详解Spring batch 入门学习教程(附源码)

详解Spring batch 入门学习教程(附源码)

Spring batch 是一个开源的批处理框架.执行一系列的任务. 在 spring batch 中 一个job 是由许多 step 组成的。而每一个 step  又是由 READ-PROCESS-WRITE task或者 单个 task 组成。

1. "READ-PROCESS-WRITE" 处理，根据字面意思理解就可以:

READ 就是从资源文件里面读取数据，比如从xml文件,csv文件,数据库中读取数据.

PROCESS 就是处理读取的数据

WRITE 就是将处理过的数据写入到其他资源文件中去，可以是XML,CSV,或者数据库.

比如：从CSV文件中 读取数据，经过处理之后，保存到数据库. spring batch 提供了很多类去处理这方面的东西。

2.单个task, 也就是处理单个任务。比如在一个step 开始之前或者完成之后清除资源文件等.

3.许多个step 组成在一起，就组成了一个job. 所以他们之间的关系，就如同下面的描述:

一个 job = 很多steps

一个step = 一个READ-PROCESS-WRITE 或者 一个task.

同样一个job = step1 -->step2--step3 这样链表形式的组成.

Spring batch 例子

考虑如下一个批处理的例子,看起来有点啰嗦，只是为了说明用途:

1. step1 : 从 A 文件夹中读取csv 文件，处理之后，写入到B文件夹中(READ-PROCESS-WRITE)

2. step2 : 从 B 文件夹中读取CSV文件 ，处理之后， 存储到数据库中(READ-PROCESS-WRITE).

3. step3 : 删除B文件夹下的CSV文件。(用到单个task)

4. step4 : 从数据库读取数据，处理之后，生成XML报表文件(READ-PROCESS-WRITE).

5. step5 : 读取XML报表,并发送EMAIL给管理员(用到单个task)

用spring batch 我们可以如下定义这个job:

processor="itemProcesser" commit-interval="1" />

processor="itemProcesser" commit-interval="1" />

processor="itemProcesser" commit-interval="1" />

整个 job 的执行是存储在数据库中的，所以即使是某一个step出错失败，也不需要全部从头开始执行这个job.下面是一个真正的入门教程例子.

采用 jar包如下:

spring-batch-2.2.3 以上版本，但是我在2.2.3版本中发现 org/springframework/batch/core/schema-mysql.sql 里面的的mysql 创建表的语句是有问题的，也就是少了“," 号导致的问题( NOT NULL, 后面几个创建表的语句NOT NULL 后面少了逗号)，当然你可以自己修改后再执行，执行完毕后有如下几个表:

xstream-1.3.jar 必须的。

jettison-1.3.3.jar也是必须的, 否则会出现

java.lang.NoClassDefFoundError: org/codehaus/jettison/mapped/MappedXMLOutputFactory错误。

另外我用的spring 是 3.1 版本的，可以下载相关jar包，还有apache common 相关jar包就可以了。

mysql-connect-java-5.1.jar 连接mysql  数据库用的。

假设要将如下 csv 文件读取出来处理之后，写入到一个xml文件之中.

,"213,100",980,"mkyong", 29/7/2013

,"320,200",1080,"staff 1", 30/7/2013

,"342,197",1200,"staff 2", 31/7/2013

用 FlatFileItemReader 去读取CSV 文件, 用 itemProcessor 去处理数据，用 StaxEventItemWriter 去写数据

job 的定义如下(job-hello-world.xml):

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

xsi:schemaLocation="http://springframework.org/schema/batch

http://springframework.org/schema/batch/spring-batch-2.2.xsd

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.1.xsd

">

commit-interval="10">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

yihaomen.model.Report

映射csv文件到 Report 对象并写XML文件 (通过 jaxb annotations).

package yihaomen.model;

import java.math.BigDecimal;

import java.util.Date;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "record")

public class Report {

private int id;

private BigDecimal sales;

private int qty;

private String staffName;

private Date date;

@XmlAttribute(name = "id")

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

@XmlElement(name = "sales")

public BigDecimal getSales() {

return sales;

}

BMjTjpublic void setSales(BigDecimal sales) {

this.sales = sales;

}

@XmlElement(name = "qty")

public int getQty() {

return qty;

}

public void setQty(int qty) {

this.qty = qty;

}

@XmlElement(name = "staffName")

public String getStaffName() {

return staffName;

}

public void setStaffName(String staffName) {

this.staffName = staffName;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

@Override

public String toString() {

return "Report [id=" + id + ", sales=" + sales + ", qty=" + qty + ", staffName=" + staffName + "]";

}

}

为了转换日期,用了自定义的 FieldSetMapper. 如果没有数据需要转换, BeanWrapperFieldSetMapper 通过名称name 去自动映射值。

package yihaomen;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import org.springframework.batch.item.file.mapping.FieldSetMapper;

import org.springframework.batch.item.file.transform.FieldSet;

import org.springframework.validation.BindException;

import yihaomen.model.Report;

public class ReportFieldSetMapper implements FieldSetMapper {

private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

@Override

public Report mapFieldSet(FieldSet fieldSet) throws BindException {

Report report = new Report();

report.setId(fieldSet.readInt(0));

report.setSales(fieldSet.readBigDecimal(1));

report.setQty(fieldSet.readInt(2));

report.setStaffName(fieldSet.readString(3));

//default format yyyy-MM-dd

//fieldSet.readDate(4);

String date = fieldSet.readString(4);

try {

report.setDate(dateFormat.parse(date));

} catch (ParseException e) {

e.printStackTrace();

}

return report;

}

}

在写入数据之前调用itemProcessor 处理数据

package yihaomen;

import org.springframework.batch.item.ItemProcessor;

import yihaomen.model.Report;

public class CustomItemProcessor implements ItemProcessor {

@Override

public Report process(Report item) throws Exception {

System.out.println("Processing..." + item);

return item;

}

}

spring 配置文件和数据库配置文件

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.2.xsd">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

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

http://springframework.org/schema/beans/spring-beans-3.2.xsd

http://springframework.org/schema/jdbc

http://springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

运行程序

package yihaomen;

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;

public class App {

public static void main(String[] args) {

String[] springConfig =

{

"spring/batch/jobs/job-hello-world.xml"

};

ApplicationContext context =

new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");

Job job = (Job) context.getBean("helloWorldJob");

try {

JobExecution execution = jobLauncher.run(job, new JobParameters());

System.out.println("Exit Status : " + execution.getStatus());

} catch (Exception e) {

e.printStackTrace();

}

System.out.println("Done");

}

}

运行结果 ：

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] launched with the following parameters: [{}]

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.job.SimpleStepHandler handleStep

INFO: Executing step: [step1]

Processing...Report [id=1001, sales=213100, qty=980, staffName=yihaomen]

Processing...Report [id=1002, sales=320200, qty=1080, staffName=staff 1]

Processing...Report [id=1003, sales=342197, qty=1200, staffName=staff 2]

十二月 03, 2013 8:56:25 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] completed with the following parameters: [{}] and the following status: [COMPLETED]

Exit Status : COMPLETED

Done

结果生成了output.xml 在你工程目录的 xml 目录下。

整个源代码，除去jar包之后下载:Spring batch 入门教程下载

processor="itemProcesser" commit-interval="1" />

processor="itemProcesser" commit-interval="1" />

processor="itemProcesser" commit-interval="1" />

整个 job 的执行是存储在数据库中的，所以即使是某一个step出错失败，也不需要全部从头开始执行这个job.下面是一个真正的入门教程例子.

采用 jar包如下:

spring-batch-2.2.3 以上版本，但是我在2.2.3版本中发现 org/springframework/batch/core/schema-mysql.sql 里面的的mysql 创建表的语句是有问题的，也就是少了“," 号导致的问题( NOT NULL, 后面几个创建表的语句NOT NULL 后面少了逗号)，当然你可以自己修改后再执行，执行完毕后有如下几个表:

xstream-1.3.jar 必须的。

jettison-1.3.3.jar也是必须的, 否则会出现

java.lang.NoClassDefFoundError: org/codehaus/jettison/mapped/MappedXMLOutputFactory错误。

另外我用的spring 是 3.1 版本的，可以下载相关jar包，还有apache common 相关jar包就可以了。

mysql-connect-java-5.1.jar 连接mysql  数据库用的。

假设要将如下 csv 文件读取出来处理之后，写入到一个xml文件之中.

,"213,100",980,"mkyong", 29/7/2013

,"320,200",1080,"staff 1", 30/7/2013

,"342,197",1200,"staff 2", 31/7/2013

用 FlatFileItemReader 去读取CSV 文件, 用 itemProcessor 去处理数据，用 StaxEventItemWriter 去写数据

job 的定义如下(job-hello-world.xml):

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

xsi:schemaLocation="http://springframework.org/schema/batch

http://springframework.org/schema/batch/spring-batch-2.2.xsd

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.1.xsd

">

commit-interval="10">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

yihaomen.model.Report

映射csv文件到 Report 对象并写XML文件 (通过 jaxb annotations).

package yihaomen.model;

import java.math.BigDecimal;

import java.util.Date;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "record")

public class Report {

private int id;

private BigDecimal sales;

private int qty;

private String staffName;

private Date date;

@XmlAttribute(name = "id")

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

@XmlElement(name = "sales")

public BigDecimal getSales() {

return sales;

}

BMjTjpublic void setSales(BigDecimal sales) {

this.sales = sales;

}

@XmlElement(name = "qty")

public int getQty() {

return qty;

}

public void setQty(int qty) {

this.qty = qty;

}

@XmlElement(name = "staffName")

public String getStaffName() {

return staffName;

}

public void setStaffName(String staffName) {

this.staffName = staffName;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

@Override

public String toString() {

return "Report [id=" + id + ", sales=" + sales + ", qty=" + qty + ", staffName=" + staffName + "]";

}

}

为了转换日期,用了自定义的 FieldSetMapper. 如果没有数据需要转换, BeanWrapperFieldSetMapper 通过名称name 去自动映射值。

package yihaomen;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import org.springframework.batch.item.file.mapping.FieldSetMapper;

import org.springframework.batch.item.file.transform.FieldSet;

import org.springframework.validation.BindException;

import yihaomen.model.Report;

public class ReportFieldSetMapper implements FieldSetMapper {

private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

@Override

public Report mapFieldSet(FieldSet fieldSet) throws BindException {

Report report = new Report();

report.setId(fieldSet.readInt(0));

report.setSales(fieldSet.readBigDecimal(1));

report.setQty(fieldSet.readInt(2));

report.setStaffName(fieldSet.readString(3));

//default format yyyy-MM-dd

//fieldSet.readDate(4);

String date = fieldSet.readString(4);

try {

report.setDate(dateFormat.parse(date));

} catch (ParseException e) {

e.printStackTrace();

}

return report;

}

}

在写入数据之前调用itemProcessor 处理数据

package yihaomen;

import org.springframework.batch.item.ItemProcessor;

import yihaomen.model.Report;

public class CustomItemProcessor implements ItemProcessor {

@Override

public Report process(Report item) throws Exception {

System.out.println("Processing..." + item);

return item;

}

}

spring 配置文件和数据库配置文件

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.2.xsd">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

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

http://springframework.org/schema/beans/spring-beans-3.2.xsd

http://springframework.org/schema/jdbc

http://springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

运行程序

package yihaomen;

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;

public class App {

public static void main(String[] args) {

String[] springConfig =

{

"spring/batch/jobs/job-hello-world.xml"

};

ApplicationContext context =

new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");

Job job = (Job) context.getBean("helloWorldJob");

try {

JobExecution execution = jobLauncher.run(job, new JobParameters());

System.out.println("Exit Status : " + execution.getStatus());

} catch (Exception e) {

e.printStackTrace();

}

System.out.println("Done");

}

}

运行结果 ：

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] launched with the following parameters: [{}]

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.job.SimpleStepHandler handleStep

INFO: Executing step: [step1]

Processing...Report [id=1001, sales=213100, qty=980, staffName=yihaomen]

Processing...Report [id=1002, sales=320200, qty=1080, staffName=staff 1]

Processing...Report [id=1003, sales=342197, qty=1200, staffName=staff 2]

十二月 03, 2013 8:56:25 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] completed with the following parameters: [{}] and the following status: [COMPLETED]

Exit Status : COMPLETED

Done

结果生成了output.xml 在你工程目录的 xml 目录下。

整个源代码，除去jar包之后下载:Spring batch 入门教程下载

processor="itemProcesser" commit-interval="1" />

processor="itemProcesser" commit-interval="1" />

整个 job 的执行是存储在数据库中的，所以即使是某一个step出错失败，也不需要全部从头开始执行这个job.下面是一个真正的入门教程例子.

采用 jar包如下:

spring-batch-2.2.3 以上版本，但是我在2.2.3版本中发现 org/springframework/batch/core/schema-mysql.sql 里面的的mysql 创建表的语句是有问题的，也就是少了“," 号导致的问题( NOT NULL, 后面几个创建表的语句NOT NULL 后面少了逗号)，当然你可以自己修改后再执行，执行完毕后有如下几个表:

xstream-1.3.jar 必须的。

jettison-1.3.3.jar也是必须的, 否则会出现

java.lang.NoClassDefFoundError: org/codehaus/jettison/mapped/MappedXMLOutputFactory错误。

另外我用的spring 是 3.1 版本的，可以下载相关jar包，还有apache common 相关jar包就可以了。

mysql-connect-java-5.1.jar 连接mysql  数据库用的。

假设要将如下 csv 文件读取出来处理之后，写入到一个xml文件之中.

,"213,100",980,"mkyong", 29/7/2013

,"320,200",1080,"staff 1", 30/7/2013

,"342,197",1200,"staff 2", 31/7/2013

用 FlatFileItemReader 去读取CSV 文件, 用 itemProcessor 去处理数据，用 StaxEventItemWriter 去写数据

job 的定义如下(job-hello-world.xml):

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

xsi:schemaLocation="http://springframework.org/schema/batch

http://springframework.org/schema/batch/spring-batch-2.2.xsd

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.1.xsd

">

commit-interval="10">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

yihaomen.model.Report

映射csv文件到 Report 对象并写XML文件 (通过 jaxb annotations).

package yihaomen.model;

import java.math.BigDecimal;

import java.util.Date;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "record")

public class Report {

private int id;

private BigDecimal sales;

private int qty;

private String staffName;

private Date date;

@XmlAttribute(name = "id")

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

@XmlElement(name = "sales")

public BigDecimal getSales() {

return sales;

}

BMjTjpublic void setSales(BigDecimal sales) {

this.sales = sales;

}

@XmlElement(name = "qty")

public int getQty() {

return qty;

}

public void setQty(int qty) {

this.qty = qty;

}

@XmlElement(name = "staffName")

public String getStaffName() {

return staffName;

}

public void setStaffName(String staffName) {

this.staffName = staffName;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

@Override

public String toString() {

return "Report [id=" + id + ", sales=" + sales + ", qty=" + qty + ", staffName=" + staffName + "]";

}

}

为了转换日期,用了自定义的 FieldSetMapper. 如果没有数据需要转换, BeanWrapperFieldSetMapper 通过名称name 去自动映射值。

package yihaomen;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import org.springframework.batch.item.file.mapping.FieldSetMapper;

import org.springframework.batch.item.file.transform.FieldSet;

import org.springframework.validation.BindException;

import yihaomen.model.Report;

public class ReportFieldSetMapper implements FieldSetMapper {

private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

@Override

public Report mapFieldSet(FieldSet fieldSet) throws BindException {

Report report = new Report();

report.setId(fieldSet.readInt(0));

report.setSales(fieldSet.readBigDecimal(1));

report.setQty(fieldSet.readInt(2));

report.setStaffName(fieldSet.readString(3));

//default format yyyy-MM-dd

//fieldSet.readDate(4);

String date = fieldSet.readString(4);

try {

report.setDate(dateFormat.parse(date));

} catch (ParseException e) {

e.printStackTrace();

}

return report;

}

}

在写入数据之前调用itemProcessor 处理数据

package yihaomen;

import org.springframework.batch.item.ItemProcessor;

import yihaomen.model.Report;

public class CustomItemProcessor implements ItemProcessor {

@Override

public Report process(Report item) throws Exception {

System.out.println("Processing..." + item);

return item;

}

}

spring 配置文件和数据库配置文件

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.2.xsd">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

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

http://springframework.org/schema/beans/spring-beans-3.2.xsd

http://springframework.org/schema/jdbc

http://springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

运行程序

package yihaomen;

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;

public class App {

public static void main(String[] args) {

String[] springConfig =

{

"spring/batch/jobs/job-hello-world.xml"

};

ApplicationContext context =

new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");

Job job = (Job) context.getBean("helloWorldJob");

try {

JobExecution execution = jobLauncher.run(job, new JobParameters());

System.out.println("Exit Status : " + execution.getStatus());

} catch (Exception e) {

e.printStackTrace();

}

System.out.println("Done");

}

}

运行结果 ：

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] launched with the following parameters: [{}]

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.job.SimpleStepHandler handleStep

INFO: Executing step: [step1]

Processing...Report [id=1001, sales=213100, qty=980, staffName=yihaomen]

Processing...Report [id=1002, sales=320200, qty=1080, staffName=staff 1]

Processing...Report [id=1003, sales=342197, qty=1200, staffName=staff 2]

十二月 03, 2013 8:56:25 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] completed with the following parameters: [{}] and the following status: [COMPLETED]

Exit Status : COMPLETED

Done

结果生成了output.xml 在你工程目录的 xml 目录下。

整个源代码，除去jar包之后下载:Spring batch 入门教程下载

processor="itemProcesser" commit-interval="1" />

整个 job 的执行是存储在数据库中的，所以即使是某一个step出错失败，也不需要全部从头开始执行这个job.下面是一个真正的入门教程例子.

采用 jar包如下:

spring-batch-2.2.3 以上版本，但是我在2.2.3版本中发现 org/springframework/batch/core/schema-mysql.sql 里面的的mysql 创建表的语句是有问题的，也就是少了“," 号导致的问题( NOT NULL, 后面几个创建表的语句NOT NULL 后面少了逗号)，当然你可以自己修改后再执行，执行完毕后有如下几个表:

xstream-1.3.jar 必须的。

jettison-1.3.3.jar也是必须的, 否则会出现

java.lang.NoClassDefFoundError: org/codehaus/jettison/mapped/MappedXMLOutputFactory错误。

另外我用的spring 是 3.1 版本的，可以下载相关jar包，还有apache common 相关jar包就可以了。

mysql-connect-java-5.1.jar 连接mysql  数据库用的。

假设要将如下 csv 文件读取出来处理之后，写入到一个xml文件之中.

,"213,100",980,"mkyong", 29/7/2013

,"320,200",1080,"staff 1", 30/7/2013

,"342,197",1200,"staff 2", 31/7/2013

用 FlatFileItemReader 去读取CSV 文件, 用 itemProcessor 去处理数据，用 StaxEventItemWriter 去写数据

job 的定义如下(job-hello-world.xml):

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

xsi:schemaLocation="http://springframework.org/schema/batch

http://springframework.org/schema/batch/spring-batch-2.2.xsd

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.1.xsd

">

commit-interval="10">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

yihaomen.model.Report

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

xsi:schemaLocation="http://springframework.org/schema/batch

http://springframework.org/schema/batch/spring-batch-2.2.xsd

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.1.xsd

">

commit-interval="10">

commit-interval="10">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">

yihaomen.model.Report

映射csv文件到 Report 对象并写XML文件 (通过 jaxb annotations).

package yihaomen.model;

import java.math.BigDecimal;

import java.util.Date;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "record")

public class Report {

private int id;

private BigDecimal sales;

private int qty;

private String staffName;

private Date date;

@XmlAttribute(name = "id")

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

@XmlElement(name = "sales")

public BigDecimal getSales() {

return sales;

}

BMjTjpublic void setSales(BigDecimal sales) {

this.sales = sales;

}

@XmlElement(name = "qty")

public int getQty() {

return qty;

}

public void setQty(int qty) {

this.qty = qty;

}

@XmlElement(name = "staffName")

public String getStaffName() {

return staffName;

}

public void setStaffName(String staffName) {

this.staffName = staffName;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

@Override

public String toString() {

return "Report [id=" + id + ", sales=" + sales + ", qty=" + qty + ", staffName=" + staffName + "]";

}

}

为了转换日期,用了自定义的 FieldSetMapper. 如果没有数据需要转换, BeanWrapperFieldSetMapper 通过名称name 去自动映射值。

package yihaomen;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import org.springframework.batch.item.file.mapping.FieldSetMapper;

import org.springframework.batch.item.file.transform.FieldSet;

import org.springframework.validation.BindException;

import yihaomen.model.Report;

public class ReportFieldSetMapper implements FieldSetMapper {

private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

@Override

public Report mapFieldSet(FieldSet fieldSet) throws BindException {

Report report = new Report();

report.setId(fieldSet.readInt(0));

report.setSales(fieldSet.readBigDecimal(1));

report.setQty(fieldSet.readInt(2));

report.setStaffName(fieldSet.readString(3));

//default format yyyy-MM-dd

//fieldSet.readDate(4);

String date = fieldSet.readString(4);

try {

report.setDate(dateFormat.parse(date));

} catch (ParseException e) {

e.printStackTrace();

}

return report;

}

}

在写入数据之前调用itemProcessor 处理数据

package yihaomen;

import org.springframework.batch.item.ItemProcessor;

import yihaomen.model.Report;

public class CustomItemProcessor implements ItemProcessor {

@Override

public Report process(Report item) throws Exception {

System.out.println("Processing..." + item);

return item;

}

}

spring 配置文件和数据库配置文件

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.2.xsd">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-3.2.xsd">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

class="org.springframework.batch.core.launch.support.SimpleJobLauncher">

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

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

http://springframework.org/schema/beans/spring-beans-3.2.xsd

http://springframework.org/schema/jdbc

http://springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

xmlns:jdbc="http://springframework.org/schema/jdbc"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

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

http://springframework.org/schema/beans/spring-beans-3.2.xsd

http://springframework.org/schema/jdbc

http://springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

运行程序

package yihaomen;

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;

public class App {

public static void main(String[] args) {

String[] springConfig =

{

"spring/batch/jobs/job-hello-world.xml"

};

ApplicationContext context =

new ClassPathXmlApplicationContext(springConfig);

JobLauncher jobLauncher = (JobLauncher) context.getBean("jobLauncher");

Job job = (Job) context.getBean("helloWorldJob");

try {

JobExecution execution = jobLauncher.run(job, new JobParameters());

System.out.println("Exit Status : " + execution.getStatus());

} catch (Exception e) {

e.printStackTrace();

}

System.out.println("Done");

}

}

运行结果 ：

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] launched with the following parameters: [{}]

十二月 03, 2013 8:56:24 下午 org.springframework.batch.core.job.SimpleStepHandler handleStep

INFO: Executing step: [step1]

Processing...Report [id=1001, sales=213100, qty=980, staffName=yihaomen]

Processing...Report [id=1002, sales=320200, qty=1080, staffName=staff 1]

Processing...Report [id=1003, sales=342197, qty=1200, staffName=staff 2]

十二月 03, 2013 8:56:25 下午 org.springframework.batch.core.launch.support.SimpleJobLauncher$1 run

INFO: Job: [FlowJob: [name=helloWorldJob]] completed with the following parameters: [{}] and the following status: [COMPLETED]

Exit Status : COMPLETED

Done

结果生成了output.xml 在你工程目录的 xml 目录下。

整个源代码，除去jar包之后下载:Spring batch 入门教程下载

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