Spring Batch_DEMO_使用JdbcCursorItemReader
Spring Batch_DEMO_使用JdbcCursorItemReader
该demo主要完成的功能就是把数据从表people读出来处理加上people的desc属性然后保存到表ok_people。。
对应的People.java和PeopleDESC.java
package com.lyx.batch;
public class People {
private int id;
private String lastName;
private String firstName;
public People() {
}
public People(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return this.firstName;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
return "firstName: " + this.firstName + ", lastName: " + this.lastName;
}
}
package com.lyx.batch;
public class PeopleDESC {
private int id;
private String lastName;
private String firstName;
private String desc;
public PeopleDESC(String lastName, String firstName, String desc) {
super();
this.lastName = lastName;
this.firstName = firstName;
this.desc = desc;
}
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getFirstName() {
return this.firstName;
}
public String getLastName() {
return this.lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
return "firstName: " + this.firstName + ", lastName: " + this.lastName;
}
public String getDesc() {
return this.desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
}
对应的数据库表
CREATE TABLE ok_people ( person_id BIGINT NOT NULL AUTO_INCREMENT, first_name VARCHAR(20), last_name VARCHAR(20), batch_desc varchar(255), PRIMARY KEY (person_id) ); CREATE TABLE people ( person_id BIGINT NOT NULL AUTO_INCREMENT, first_name VARCHAR(20), last_name VARCHAR(20), PRIMARY KEY (person_id) );
主要过程还是配置job的reader，processor，writer，下面是配置文件中的reader，processor，wirter，如下配置文件：
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:batch="http://www.springframework.org/schema/batch" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd"> <bean id="exceptionHandler" class="com.lyx.batch.ExceptionListener" /> <batch:step id="abstractStep" abstract="true"> <batch:listeners> <batch:listener ref="exceptionHandler" /> </batch:listeners> </batch:step> <bean id="abstractCursorReader" abstract="true" class="org.springframework.batch.item.database.JdbcCursorItemReader"> <property name="dataSource" ref="dataSource" /> </bean> <batch:job id="addPeopleDescJob"> <batch:step id="addDescStep" parent="abstractStep"> <batch:tasklet> <batch:chunk reader="peopleAddDescReader" processor="addDescProcessor" writer="addDescPeopleWriter" commit-interval="2"/> </batch:tasklet> </batch:step> </batch:job> <bean id="peopleAddDescReader" parent="abstractCursorReader" scope="step"> <property name="sql"> <value><![CDATA[select first_name ,last_name from people where first_name like ? or last_name like ?]]></value> </property> <property name="rowMapper" ref="peopleRowMapper" /> <property name="preparedStatementSetter" ref="preparedStatementSetter" /> <property name="fetchSize" value="20" /> </bean> <bean id="peopleRowMapper" class="com.lyx.batch.PeopleRowMapper" /> <bean id="preparedStatementSetter" class="com.lyx.batch.PeoplePreparedStatementSetter" /> <bean id="addDescProcessor" class="com.lyx.batch.AddPeopleDescProcessor" /> <bean id="addDescPeopleWriter" class="com.lyx.batch.AddDescPeopleWriter" > <property name="dataSource" ref="dataSource"/> </bean> <!--tomcat jdbc pool数据源配置 --> <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close"> <property name="poolProperties"> <bean class="org.apache.tomcat.jdbc.pool.PoolProperties"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/test" /> <property name="username" value="root" /> <property name="password" value="034039" /> </bean> </property> </bean> <!-- spring batch 配置jobRepository --> <batch:job-repository id="jobRepository" data-source="dataSource" transaction-manager="transactionManager" isolation-level-for-create="REPEATABLE_READ" table-prefix="BATCH_" max-varchar-length="1000" /> <!-- spring的事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- batch luncher --> <bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher"> <property name="jobRepository" ref="jobRepository" /> </bean> </beans>
对应的类：
PeopleRowMapper.java
package com.lyx.batch;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class PeopleRowMapper implements RowMapper<People> {
public People mapRow(ResultSet rs, int rowNum) throws SQLException {
People p = new People();
p.setFirstName(rs.getString("first_name"));
p.setLastName(rs.getString("last_name"));
return p;
}
}
PeoplePreparedStatementSetter.java
package com.lyx.batch;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import org.springframework.jdbc.core.PreparedStatementSetter;
public class PeoplePreparedStatementSetter implements PreparedStatementSetter {
public void setValues(PreparedStatement ps) throws SQLException {
// TODO Auto-generated method stub
ps.setString(1, "%JOHN%");
ps.setString(2, "%DOE%");
}
}
AddPeopleDescProcessor.java
package com.lyx.batch;
import org.springframework.batch.item.ItemProcessor;
public class AddPeopleDescProcessor implements
ItemProcessor<People, PeopleDESC> {
public PeopleDESC process(People item) throws Exception {
return new PeopleDESC(item.getLastName(), item.getFirstName(), Thread
.currentThread().getName());
}
}
AddDescPeopleWriter.java
package com.lyx.batch;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.batch.item.ItemWriter;
import org.springframework.jdbc.core.JdbcTemplate;
public class AddDescPeopleWriter implements ItemWriter<PeopleDESC> {
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.jdbcTemplate = new JdbcTemplate(dataSource);
}
public void write(List<? extends PeopleDESC> items) throws Exception {
for (PeopleDESC peopleDESC : items) {
this.jdbcTemplate
.update("insert into ok_people (first_name, last_name, batch_desc) values (?, ?, ?)",
peopleDESC.getFirstName(),
peopleDESC.getLastName(), peopleDESC.getDesc());
}
}
}
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