Spring Batch Xml Generation

Hi Friends ,i will going to demosntrate how we can generate xml using spring batch application .

In this example i have used maven project structure ,

Project Structure is look like given below

The Code is as given below :
database script :: 

(1)

DROP TABLE IF EXISTS `studentdb`.`batchstrn`;
CREATE TABLE  `studentdb`.`batchstrn` (
  `BATCHRUNID` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `BATCHID` int(10) unsigned NOT NULL,
  `REQDATE` datetime NOT NULL,
  `PROCSTARTDATE` datetime NOT NULL,
  `STATUSCODE` varchar(45) NOT NULL,
  PRIMARY KEY (`BATCHRUNID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;


Main Class  :
package org.zip;

import java.util.HashMap;
import java.util.Map;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParameter;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
//@Component
public class App {

public static void main(String[] args) {

App obj = new App();
obj.run();


}
//batchstrn
private void run() {

String[] springConfig = { "spring/batch/jobs/student_excelList.xml" };

ApplicationContext context = new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("XML_GEN");

Map<String, JobParameter> mapofParam = new  HashMap<String, JobParameter>();

mapofParam.put("BATCHID", new JobParameter("3"));

JobParameters jobparam= new JobParameters(mapofParam);

try {

JobExecution execution = jobLauncher.run(job, jobparam);
System.out.println("Exit Status : " + execution.getStatus());
System.out.println("Exit Status : " + execution.getAllFailureExceptions());

} catch (Exception e) {
e.printStackTrace();

}

System.out.println("Done");

}


}

The Configuration file for job is as given below :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/batch
http://www.springframework.org/schema/batch/spring-batch-2.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/task
    http://www.springframework.org/schema/task/spring-task-3.2.xsd
">

<context:annotation-config />
<context:component-scan base-package="org.batch" />


<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/studentdb" />
<property name="username" value="root" />
<property name="password" value="admin!@#" />
</bean>

<bean id="readListener" class="org.batch.listener.XmlReadListener" />

<batch:job id="XML_GEN" >
<batch:step id="XML_GEN_STEP1"  next="XML_GEN_STEP2">
<batch:tasklet ref="XML_GEN_batchinit" >


</batch:tasklet>
</batch:step>


<batch:step id="XML_GEN_STEP2" >
<batch:tasklet>
<batch:chunk reader="XML_GEN_itemreader" writer="XML_GEN_itemwriter"
processor="XML_GEN_itemprocessor" commit-interval="10">

<batch:listeners>
<batch:listener ref="readListener"/>
</batch:listeners>
</batch:chunk>
</batch:tasklet>
</batch:step>


</batch:job>



<!-- TASKLET -->
<bean id="XML_GEN_batchinit" class="org.batch.tasklet.Student_InitTasklet"
scope="step">
<property name="batchId" value="#{jobParameters['BATCHID']}" />

</bean>




<!-- READ -->
<bean id="XML_GEN_itemreader"
class="org.springframework.batch.item.database.JdbcCursorItemReader"
scope="step">
<property name="dataSource" ref="dataSource" />
<property name="sql"
value="select * from student where status='A'"
/>
<property name="rowMapper">
<bean class="org.batch.mapper.Student_RowMapper" />
</property>
  </bean>


<!-- PROCESS -->
<bean id="XML_GEN_itemprocessor" class="org.batch.processor.Student_Processor"
scope="step" >

<property name="batchRunId" value="#{jobExecutionContext['BATCHRUNID']}" />

</bean>


<!-- WRITE -->
<bean id="XML_GEN_itemwriter" class="org.batch.writer.StudentGeneration_Writer" scope="step">
<property name="dataSource" ref="dataSource" />
<property name="batchRunId" value="#{jobExecutionContext['BATCHRUNID']}" />
</bean>

<bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
        <property name="jobRepository" ref="jobRepository"/>
    </bean>
 
<bean id="jobRepository" class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean">
        <property name="transactionManager" ref="transactionManager"/>
    </bean>
 
     <bean id="transactionManager" class="org.springframework.batch.support.transaction.ResourcelessTransactionManager
     "/>


</beans>

 
CONTEXT.XML

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">

<!-- stored job-meta in memory -->
<bean id="jobRepository"
class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean">
<property name="transactionManager" ref="transactionManager" />
</bean>
 
<bean id="transactionManager"
class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>



<!-- Read environment property -->

<bean id="envProperties"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:META-INF/i18n/zip-batch.properties</value>
</list>
</property>
</bean>



</beans>

PROCESSOR:

package org.batch.processor;

import org.batch.model.Student;

import org.springframework.batch.item.ItemProcessor;

public class Student_Processor implements ItemProcessor<Student, Student> {

private int batchRunId;

@Override

public Student process(Student stdent) throws Exception {

// TODO Auto-generated method stub

return stdent;

}

public int getBatchRunId() {

return batchRunId;

}

public void setBatchRunId(int batchRunId) {

this.batchRunId = batchRunId;

}

}

WRITER :

package org.batch.writer;

/*import org.apache.commons.beanutils.PropertyUtils;*/

import java.io.File;

import java.util.ArrayList;

import java.util.List;

import javax.sql.DataSource;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.Transformer;

import javax.xml.transform.TransformerFactory;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.batch.model.Student;

import org.springframework.batch.core.ExitStatus;

import org.springframework.batch.core.StepExecution;

import org.springframework.batch.core.StepExecutionListener;

import org.springframework.batch.item.ItemWriter;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.jdbc.core.JdbcTemplate;

import org.w3c.dom.Attr;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

public class StudentGeneration_Writer  implements ItemWriter<Student>,StepExecutionListener{

private JdbcTemplate jdbcTemplate;

int batchRunId;

@Autowired

public void setDataSource(DataSource dataSource) {

this.jdbcTemplate = new JdbcTemplate(dataSource);

}

@Override

public ExitStatus afterStep(StepExecution stepExecution) {

// TODO Auto-generated method stub

String sqlUpdate="UPDATE batchstrn SET STATUSCODE='S' WHERE BATCHRUNID=?";

jdbcTemplate.update(sqlUpdate,batchRunId);

return ExitStatus.COMPLETED;

}

@Override

public void beforeStep(StepExecution arg0) {

// TODO Auto-generated method stub

}

@Override

public void write(List<? extends Student> studentList) throws Exception {

// TODO Auto-generated method stub

List<Student> listStudent = new  ArrayList<Student>();

for(Student dto:studentList)

{

Student studentObj = new Student();

studentObj.setId(dto.getId());

studentObj.setName(dto.getName());

studentObj.setCollege(dto.getCollege());

studentObj.setStatus(dto.getStatus());

listStudent.add(studentObj);

}

createXml(listStudent);

}

public int getBatchRunId() {

return batchRunId;

}

public void setBatchRunId(int batchRunId) {

this.batchRunId = batchRunId;

}

//new

public static void  createXml(List<? extends Student> studentList)

{

/*

private String id ;

private String name;

private String college;

private String status;

*/

try {

DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();

DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

// root elements

Document doc = docBuilder.newDocument();

Element rootElement = doc.createElement("college");

doc.appendChild(rootElement);

// staff elements

for (Student student : studentList) {

Element staff = doc.createElement("Student");

rootElement.appendChild(staff);

// set attribute to staff element

Attr attr = doc.createAttribute("id");

attr.setValue(student.getId());

staff.setAttributeNode(attr);

Element firstname = doc.createElement("name");

firstname.appendChild(doc.createTextNode(student.getName()));

staff.appendChild(firstname);

Element lastname = doc.createElement("college");

lastname.appendChild(doc.createTextNode(student.getCollege()));

staff.appendChild(lastname);

Element nickname = doc.createElement("status");

nickname.appendChild(doc.createTextNode(student.getStatus()));

staff.appendChild(nickname);

// write the content into xml file

TransformerFactory transformerFactory = TransformerFactory.newInstance();

Transformer transformer = transformerFactory.newTransformer();

DOMSource source = new DOMSource(doc);

StreamResult result = new StreamResult(new File("D:\\file.xml"));

// Output to console for testing

// StreamResult result = new StreamResult(System.out);

transformer.transform(source, result);

System.out.println("File saved!");

 } 

}

catch (Exception pce) {

pce.printStackTrace();

 }

}

}

THANKS for reading this article.for any query ping me on pathak.nisarg@yahoo.com

Happy Learning!!

Spring Batch Processing Example

Hello Friends ,hope you all are fine.today i am going to demonstrate you ,how we can configure spring batch application.

Spring batch is useful to  process large volume data.consider scenario where we want to read data from database and write those all data into xml file.in this we can use Spring Batch.Spring Batch Provides classes and api's to read/write resources, transaction management,job processing statistics etc.

Apart from Spring jars, i have used two main jars which will be used for batch processing  :
(1)spring-batch-core-2.2.0.RELEASE.jar,
(2)spring-batch-infrastructure-2.2.0.RELEASE.jar

In this example i have used maven project structure ,i will read all files from particular directory ,make one zip of it and then i will dump all file details of that particular directory in database, apart from that i am also keeping track how many times batch will get executed.

Project Structure is look like given below :

database script ::

(1)

DROP TABLE IF EXISTS `studentdb`.`batchstrn`;
CREATE TABLE  `studentdb`.`batchstrn` (
  `BATCHRUNID` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `BATCHID` int(10) unsigned NOT NULL,
  `REQDATE` datetime NOT NULL,
  `PROCSTARTDATE` datetime NOT NULL,
  `STATUSCODE` varchar(45) NOT NULL,
  PRIMARY KEY (`BATCHRUNID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;

(2)

DROP TABLE IF EXISTS `studentdb`.`zip_dtl`;
CREATE TABLE  `studentdb`.`zip_dtl` (
  `ZIP_ID` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `FILE_NAME` varchar(45) NOT NULL,
  `FILE_PATH` varchar(45) NOT NULL,
  PRIMARY KEY (`ZIP_ID`)
) ENGINE=InnoDB AUTO_INCREMENT=288 DEFAULT CHARSET=latin1;





Main Class  :
package org.zip;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
//@Component
public class App {

public static void main(String[] args) {

App obj = new App();
obj.run();


}

private void run() {

String[] springConfig = { "spring/batch/jobs/job-zip-gen.xml" }; //xml that contains job configuration parameters

ApplicationContext context = new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");
Job job = (Job) context.getBean("zipGenJob");


try {

JobExecution execution = jobLauncher.run(job, new JobParameters());
System.out.println("Exit Status : " + execution.getStatus());
System.out.println("Exit Status : " + execution.getAllFailureExceptions());

} catch (Exception e) {
e.printStackTrace();

}

System.out.println("Done");

}

}


The Configuration file for job is as given below :
job-zip-gen.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/batch
http://www.springframework.org/schema/batch/spring-batch-2.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-3.2.xsd
">


<import resource="../config/context.xml" />

<context:annotation-config/>
<context:component-scan base-package="org.zip"></context:component-scan>


<!-- datasource -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/studentdb" />
<property name="username" value="root" />
<property name="password" value="admin!@#" />
</bean>

<!-- <bean id="baseReader" class="org.springframework.batch.item.database.JdbcCursorItemReader">
        <property name="dataSource" ref="dataSource" />
        <property name="sqlQuery" value="select * from contact" />
</bean> -->


<job id="zipGenJob" xmlns="http://www.springframework.org/schema/batch">

<step id="zipGen">
   <tasklet ref="ZipGenerationTasklet" />
</step>
</job>


<bean id="ZipGenerationTasklet" class="org.zip.tasklet.ZipGenerationTasklet" >

<!-- <property name="dataSource" ref="dataSource"/> -->
<!-- <property name="directory" value="file:csv/inputs/" /> -->
<!--  <property name="SOURCE_FOLDER" value="${zip.batch.output_zip_file}"></property> -->
<!-- <property name="OUTPUT_ZIP_FILE" value="${zip.batch.source_folder}"></property> -->

</bean>



<!-- <task:scheduled-tasks>
   
<task:scheduled ref="zipGenJob" method="run" cron="*/5 * * * * *" />
   </task:scheduled-tasks>   -->

</beans>

context.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">


<bean id="jobRepository"
class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean">
<property name="transactionManager" ref="transactionManager" />
</bean>
 
<bean id="transactionManager"
class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>

<!-- addd by nisarg pathak  -->

<!-- Read property -->

<bean id="envProperties"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:META-INF/i18n/zip-batch.properties</value>
</list>
</property>
</bean>


</beans>

Model Class :

package org.zip.model;

import java.io.Serializable;

public class ZIPGEN implements Serializable {


/**
*
*/
private static final long serialVersionUID = 1L;
private int  ZIP_ID;
private String FILE_NAME;
public int getZIP_ID() {
return ZIP_ID;
}
public void setZIP_ID(int zIP_ID) {
ZIP_ID = zIP_ID;
}
public String getFILE_NAME() {
return FILE_NAME;
}
public void setFILE_NAME(String fILE_NAME) {
FILE_NAME = fILE_NAME;
}
public String getFILE_PATH() {
return FILE_PATH;
}
public void setFILE_PATH(String fILE_PATH) {
FILE_PATH = fILE_PATH;
}
private String FILE_PATH;



}



Tasklet to get files as well as dump those file details is as given below :

package org.zip.tasklet;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import javax.sql.DataSource;

import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.StepExecutionListener;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.SqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcCall;
import org.springframework.stereotype.Component;

@Component
public class ZipGenerationTasklet implements Tasklet, InitializingBean,StepExecutionListener {

/*private Resource directory;*/
List<String> fileList =new ArrayList<String>();
    private  String OUTPUT_ZIP_FILE= "D:\\MyFile.zip";
    private String SOURCE_FOLDER ="D:\\NisargPics";

private JdbcTemplate jdbcTemplate;
int batchid;
BigInteger batch_run_id;
private long batchId=2;

private SimpleJdbcCall simpleJdbcCall;
@Autowired
public void setDataSource(DataSource dataSource) {
this.jdbcTemplate = new JdbcTemplate(dataSource);
simpleJdbcCall = new SimpleJdbcCall(dataSource).withFunctionName("get_id");
}

@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {



System.out.println("Proc call to get auto incr. value .....!");

SqlParameterSource  mapParam = new MapSqlParameterSource().addValue("name_","zip_dtl");


Map<String,Object> map =  simpleJdbcCall.execute(mapParam);

System.out.println("Executing The Procedure  .....!");
BigInteger id = (BigInteger)map.get("sequence_no_");

// batch_run_id=jdbcTemplate.queryForObject("SELECT sequence_no+1 FROM sequence_generate_tab", BigInteger.class);

String sql="INSERT INTO BATCHSTRN (BATCHRUNID,BATCHID,REQDATE,PROCSTARTDATE,STATUSCODE)"
+ "VALUES (?, ?, ?, ?, 'S')";

jdbcTemplate.update(sql,batch_run_id,batchId,getCurrentTimeStamp(),getCurrentTimeStamp());



System.out.println("Execution Start .....!");

generateFileList(new File(SOURCE_FOLDER));
zipIt(OUTPUT_ZIP_FILE,id);
   


System.out.println("Execution End .....!");

return RepeatStatus.FINISHED;

}
/*
public Resource getDirectory() {
return directory;
}

public void setDirectory(Resource directory) {
this.directory = directory;
}
*/
public void zipIt(String zipFile, BigInteger id){

//System.out.println("id:::::::::->"+id);

String sql = "INSERT INTO ZIP_DTL " +
"(ZIP_ID,FILE_NAME, FILE_PATH) VALUES (?, ?, ?)";
    byte[] buffer = new byte[1024];

    try{

    FileOutputStream fos = new FileOutputStream(zipFile);
    ZipOutputStream zos = new ZipOutputStream(fos);

    System.out.println("Output to Zip : " + zipFile);

    int i =2;
    for(String file : this.fileList){
   
    System.out.println("File Added : " + file);
   
    //
   
    jdbcTemplate.update(sql,new Object[]{id,file,file});
     
    i=i+1;
     
   
    ZipEntry ze= new ZipEntry(file);
        zos.putNextEntry(ze);

        FileInputStream in =
                      new FileInputStream(SOURCE_FOLDER + File.separator + file);

        int len;
        while ((len = in.read(buffer)) > 0) {
        zos.write(buffer, 0, len);
        }

        in.close();
    }

    zos.closeEntry();
    //remember close it
    zos.close();

    System.out.println("Done");
   }catch(IOException ex){
      ex.printStackTrace();  
   }
  }

   /**
    * Traverse a directory and get all files,
    * and add the file into fileList
    * @param node file or directory
    */
   public void generateFileList(File node){

    //add file only
if(node.isFile()){
fileList.add(generateZipEntry(node.getAbsoluteFile().toString()));
}

if(node.isDirectory()){
String[] subNote = node.list();
for(String filename : subNote){
generateFileList(new File(node, filename));
}
}

   }

   /**
    * Format the file path for zip
    * @param file file path
    * @return Formatted file path
    */
   private String generateZipEntry(String file){
    return file.substring(SOURCE_FOLDER.length()+1, file.length());
   }

@Override
public void afterPropertiesSet() throws Exception {
// TODO Auto-generated method stub

}

@Override
public ExitStatus afterStep(StepExecution stepExecution) {
// TODO Auto-generated method stub

stepExecution.getJobExecution().getExecutionContext()
.put("BATCHRUNID", batch_run_id);

return null;
}

@Override
public void beforeStep(StepExecution arg0) {
// TODO Auto-generated method stub

}

public static String getCurrentTimeStamp() {
SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//dd/MM/yyyy
Date now = new Date();
String strDate = sdfDate.format(now);
return strDate;
}
}




for the sake of simplicity , I have shared the  project ,you can download it from following link
Download Project


for any query ping me on npjava90@gmail.com
Happy Learning...!!

Thanks

Multiple File Upload Using Spring MVC and Hibernate

Hello Friends,Hope you all are fine,its been very long i posted new post,very hactic schedule,i am going  to demonstrate how we can upload file using future provided by Spring 3.0 with hibernate as a backend.

The Code is as given below :

MODEL CLASS 

package org.fileupload.model;

import java.util.List;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Transient;

import org.springframework.web.multipart.MultipartFile;

@Entity
@Table(name="trnimage")
public class FileuploadVO {

public int getID() {
return ID;
}

public void setID(int iD) {
ID = iD;
}

public byte[] getData() {
return data;
}

public void setData(byte[] data) {
this.data = data;
}

public String getIMAGE_NAME() {
return IMAGE_NAME;
}

public void setIMAGE_NAME(String iMAGE_NAME) {
IMAGE_NAME = iMAGE_NAME;
}

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "ID", unique = true, nullable = false)
private int ID;
@Column(name = "DATA", unique = false, nullable = false, length = 100000)
private byte[] data;
@Column(name = "IMAGE_NAME", unique = false, nullable = false, length = 100)
private String IMAGE_NAME;
@Transient

private List<MultipartFile> Files;

public List<MultipartFile> getFiles() {
return Files;
}

public void setFiles(List<MultipartFile> files) {
Files = files;
}

 
}

Controller :

package org.fileupload.controller;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.fileupload.dao.fileUploadDaoImpl;

import org.fileupload.model.FileuploadVO;

import org.fileupload.service.fileUploadServiceImpl;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.context.WebApplicationContext;

import org.springframework.web.context.support.WebApplicationContextUtils;

import org.springframework.web.multipart.MultipartFile;

@Controller

public class FileUploadController {

//

@RequestMapping(value = "/upload.htm", method = RequestMethod.POST)

    public String SaveImage(

            @ModelAttribute("uploadForm") FileuploadVO uploadForm,

            Model map,HttpServletRequest request ) throws IllegalStateException, IOException {

WebApplicationContext context =WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());

fileUploadServiceImpl  service=(fileUploadServiceImpl) context.getBean("fileuploadService");

fileUploadDaoImpl dao=(fileUploadDaoImpl) context.getBean("fileuploadDAO");

ResourceBundle rb = ResourceBundle.getBundle("resources/filePath");  //filePath is Property file
String saveDirectory = rb.getString("file.fileUploadPath");

        List<MultipartFile> listFiles = uploadForm.getFiles();

        List<String> fileNames = new ArrayList<String>();

        if (null != listFiles && listFiles.size() > 0) {

            for (MultipartFile multipartFile : listFiles) {

                String fileName = multipartFile.getOriginalFilename();

                if (!"".equalsIgnoreCase(fileName)) {

                    // Handle file content - multipartFile.getInputStream()

                    multipartFile

                            .transferTo(new File(saveDirectory + fileName));

                    fileNames.add(fileName);

                   

                    uploadForm.setData(fileName.getBytes());

                    uploadForm.setIMAGE_NAME(fileName);

                   service.saveImage(uploadForm);

                   

                }

            }

            

        } 

       

        map.addAttribute("files", fileNames);

        return "uploadfilesuccess";

    }
@RequestMapping(value = "/download.htm", method = RequestMethod.GET)
    public String download(  @RequestParam("id") String id,      
            Model map,HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException {

System.out.println("id is  : "+id);

WebApplicationContext context =WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());

fileUploadServiceImpl  service=(fileUploadServiceImpl) context.getBean("fileuploadService");

FileuploadVO f = service.downloadImg(id);
        response.setContentLength(f.getData().length);
        response.setHeader("Content-Disposition","attachment; filename=\"" + f.getIMAGE_NAME() +"\"");

        FileCopyUtils.copy(f.getData(), response.getOutputStream());

        return null;

}

}

DAO LAYER

package org.fileupload.dao;

import org.fileupload.model.FileuploadVO;

public interface fileUploadDao {

public void saveImage(FileuploadVO fileupload);

 public FileuploadVO downloadImg(String id);
}

package org.fileupload.dao;

import org.fileupload.model.FileuploadVO;

import org.springframework.orm.hibernate3.HibernateTemplate;

public class fileUploadDaoImpl  implements fileUploadDao{

private HibernateTemplate template;

public fileUploadDaoImpl(HibernateTemplate template) {

this.template = template;

}

@Override

public void saveImage(FileuploadVO fileupload) {

template.save(fileupload);

}

public FileuploadVO downloadImg(String id)
{
// String  query = "select * from  trnimage where ID = ?";
FileuploadVO file  = (FileuploadVO) template.getSessionFactory().openSession().load(FileuploadVO.class, new Integer(id));

return file;
}

}

SERVICE LAYER:

package org.fileupload.service;

import org.fileupload.model.FileuploadVO;

public interface fiileUploadService {

public void saveImage(FileuploadVO fileupload);
public FileuploadVO downloadImg(String id);

}

package org.fileupload.service;

import org.fileupload.dao.fileUploadDaoImpl;

import org.fileupload.model.FileuploadVO;

import org.springframework.beans.factory.annotation.Autowired;

public class fileUploadServiceImpl  implements fiileUploadService{

@Autowired

private fileUploadDaoImpl fileuploadDAO;

@Override

public void saveImage(FileuploadVO fileupload) {

fileuploadDAO.saveImage(fileupload);

}
public FileuploadVO downloadImg(String id) {

return fileuploadDAO.downloadImg(id);

}

}

dbConfig.properties

jdbc.driverClassName = com.mysql.jdbc.Driver

jdbc.url = jdbc:mysql://localhost:3306/studentdb

jdbc.username = root

jdbc.password = admin!@#

WEB.XML

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

id="WebApp_ID" version="2.5">

<display-name>Optic Solution</display-name>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list> 

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/applicationcontext-servlet.xml</param-value>

</context-param>

<listener>

<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>

</listener>

<servlet>

<servlet-name>applicationcontext</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>applicationcontext</servlet-name>

<url-pattern>*.htm</url-pattern>

</servlet-mapping>

</web-app>

applicationcontext-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p" xmlns:mvc="http://www.springframework.org/schema/mvc"

xsi:schemaLocation="http://www.springframework.org/schema/beans 

    http://www.springframework.org/schema/beans/spring-beans.xsd 

    http://www.springframework.org/schema/context  

    http://www.springframework.org/schema/context/spring-context.xsd

     http://www.springframework.org/schema/mvc 

     http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:component-scan base-package="org.fileupload.controller"></context:component-scan>

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<property name="location"><value>classpath:resources/dbConfig.properties</value> </property> 

 

</bean> 

<!-- Hibernate Configuration -->

<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource"

destroy-method="close">

<property name="driverClassName" value="${jdbc.driverClassName}" />

<property name="url" value="${jdbc.url}" />

<property name="username" value="${jdbc.username}" />

<property name="password" value="${jdbc.password}" />

</bean>

<bean id="mySessionFactory"

class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

<property name="dataSource" ref="myDataSource" />

<property name="annotatedClasses">

<list>

<value>org.fileupload.model.FileuploadVO</value>

</list>

</property>

<property name="hibernateProperties">

<props>

<prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</prop>

<prop key="hibernate.show_sql">true  </prop> 

 <prop key="hibernate.dbcp.initialSize">8</prop>

 <prop key="hibernate.dbcp.maxActive">20</prop>

 <prop key="hibernate.dbcp.maxIdle">20</prop>

 <prop key="hibernate.dbcp.minIdle">0</prop>

<prop key="hibernate.hbm2ddl.auto">none</prop>

</props>

</property>

</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">

<constructor-arg ref="mySessionFactory" />

</bean>

<!-- list of bean definations -->

<bean id="fileuploadDAO" class="org.fileupload.dao.fileUploadDaoImpl">

<constructor-arg ref="hibernateTemplate" />

</bean>

<bean id="fileuploadService" class="org.fileupload.service.fileUploadServiceImpl">

</bean> 

<bean id="JsonMapper" class="org.optical.handler.JsonMapper"></bean>

                           

<bean

class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

<property name="cacheSeconds" value="0" />

</bean>

 

<bean id="viewResolver"

          class="org.springframework.web.servlet.view.InternalResourceViewResolver"

          p:prefix="/WEB-INF/jsp/"

          p:suffix=".jsp" />

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <property name="maxUploadSize" value="5242880" />

    </bean>

</beans>

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

<html>

  <head><title>Upload and Download files using Spring</title></head>

  <body>

   

    <h2>Add New File</h2>

    

   <%--  <form action="upload.htm" method="post" enctype="multipart/form-data">

        <table width="60%" border="1" cellspacing="0">

            <tr>

                <td width="35%"><strong>File to upload</strong></td>

                <td width="65%"><input type="file" name="file" /></td>

            </tr>

            <tr>

                <td><strong>Notes</strong></td>

                <td><input type="text" name="notes" width="60" /></td>

            </tr>

            <tr>

                <td>&nbsp;</td>

                <td><input type="submit" name="submit" value="Add"/></td>

            </tr>

        </table>

    </form> --%>

     <form:form method="post" action="upload.htm"

            modelAttribute="uploadForm" enctype="multipart/form-data">

            <p>Select files to upload. Press Add button to add more file

                inputs.</p>

            <table id="fileTable">

                <tr>

                    <td><input name="files[0]" type="file" /></td>

                </tr>

                <tr>

                    <td><input name="files[1]" type="file" /></td>

                </tr>

            </table>

            <br />

            <input type="submit" value="Upload" />

            <input id="addFile" type="button" value="Add File" />

        </form:form>

  </body>

</html>

uploadfilesuccess.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"

    pageEncoding="ISO-8859-1"%>

    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

        <p>Awesome.. Following file  is uploaded successfully.</p>

         <table width="80%" border="1" cellspacing="0" cellpadding="5">

        <tr>

            <th width="4%">No</th>

            <th width="30%">Filename</th>

            

            <th width="20%">&nbsp;</th>

        </tr>

        <c:choose>

            <c:when test="${files != null}">

                <c:forEach var="file" items="${files}" varStatus="counter">

                    <tr>

                        <td>${counter.index + 1}</td>

                        <td>${file}</td>

                      <td><div align="center"><a href="download.htm?id=${ids}">Download</a> </div></td>

                        </td>

                    </tr>

                </c:forEach>

            </c:when>

        </c:choose>

    </table>

</body>

</html>

Screenshot of application is as given below: 

Thanks for reading this article 

for any query ping me on pathak.nisarg@yahoo.com