Spring Batch之读数据库——JdbcCursorItemReader之自定义PreparedStatementSetter（三十八）

一、自定义PreparedStatementSetter

详情参考我的另一篇博客：

Spring Batch之读数据库——JdbcCursorItemReader（三十五）_人……杰的博客-CSDN博客

二、项目实例

1.项目实例

2.代码实现

BatchMain.java：

package com.xj.demo29;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * @Author : xjfu
 * @Date : 2021/10/26 20:01
 * @Description : demo29 JdbcCursorItemReader之自定义PreparedStatementSetter
 */
public class BatchMain {
    public static void main(String[] args) {

        ApplicationContext context = new ClassPathXmlApplicationContext("demo29/job/demo29-job.xml");
        //Spring Batch的作业启动器,
        JobLauncher launcher = (JobLauncher) context.getBean("jobLauncher");
        //在batch.xml中配置的一个作业
        Job job  = (Job)context.getBean("billJob");

        try{
            //开始执行这个作业,获得处理结果(要运行的job,job参数对象)
            JobExecution result = launcher.run(job, new JobParametersBuilder()
                    .addLong("time",System.currentTimeMillis())//主要是为了防止出现“A job instance already exists and is complete for parameters”异常
                    .toJobParameters());
            System.out.println(result.toString());
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

CreditBill.java：

package com.xj.demo29;

/**
 * @Author : xjfu
 * @Date : 2021/10/26 19:27
 * @Description :
 */
public class CreditBill {
    //银行卡账户ID
    private String accountID = "";
    //持卡人姓名
    private String name = "";
    //消费金额
    private double amount = 0;
    //消费日期
    private String date = "";
    //消费场所
    private String address = "";

    public String getAccountID() {
        return accountID;
    }

    public void setAccountID(String accountID) {
        this.accountID = accountID;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getAmount() {
        return amount;
    }

    public void setAmount(double amount) {
        this.amount = amount;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return this.accountID + "," + this.name + "," + this.amount + "," + this.date + "," + this.address;
    }
}

CreditBillPreparedStatementSetter.java：

package com.xj.demo29;

import org.springframework.jdbc.core.PreparedStatementSetter;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class CreditBillPreparedStatementSetter implements
        PreparedStatementSetter {

	public void setValues(PreparedStatement ps) throws SQLException {
		//此处设置第一个参数为“5”
		ps.setString(1, "5");
	}

}

CreditBillProcessor.java：

package com.xj.demo29;

import org.springframework.batch.item.ItemProcessor;

public class CreditBillProcessor implements
        ItemProcessor {

	public CreditBill process(CreditBill bill) throws Exception {
		System.out.println(bill.toString());
		return bill;
	}
}

CreditBillRowMapper.java：

package com.xj.demo29;

import org.springframework.jdbc.core.RowMapper;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
 * @Author : xjfu
 * @Date : 2023/7/17 01:31
 * @Description : 自定义RowMapper实现CreditBillRowMapper，将给定的结果集ResultSet转化为CreditBill对象
 */
public class CreditBillRowMapper implements RowMapper {

	public CreditBill mapRow(ResultSet rs, int rowNum) throws SQLException {
		CreditBill bill = new CreditBill();
		bill.setAccountID(rs.getString("ACCOUNTID"));
		bill.setAddress(rs.getString("ADDRESS"));
		bill.setAmount(rs.getDouble("AMOUNT"));
		bill.setDate(rs.getString("DATE"));
		bill.setName(rs.getString("NAME"));
		return bill;
	}
}

DummyCreditItemWriter.java：

package com.xj.demo29;

import org.springframework.batch.item.ItemWriter;
import java.util.ArrayList;
import java.util.List;

public class DummyCreditItemWriter implements ItemWriter {

	public List creditBills = new ArrayList();

	public void write(List items) throws Exception {
		creditBills.addAll(items);
	}

	public List getCredits() {
		return creditBills;
	}
}

demo29-job.xml：

demo29-jobContext.xml：

    
    

    
    

    
    
        
    

    
    
        
        
    

    
    
        
            ${datasource.driver}
        
        
            ${datasource.url}
        
        
        
    

    
    
        
        
        
        
        
        
        
    

    
    

    
    

    
    

    
    

create-tables-mysql.sql：

DROP TABLE IF EXISTS t_credit;
DROP TABLE IF EXISTS t_destcredit;

CREATE TABLE t_credit
    (ID VARCHAR(10),
        ACCOUNTID VARCHAR(20),
        NAME VARCHAR(10),
        AMOUNT NUMERIC(10,2),
        DATE VARCHAR(20),
        ADDRESS VARCHAR(128),
        primary key (ID)
    )
    ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
CREATE TABLE t_destcredit
    (ID VARCHAR(10),
        ACCOUNTID VARCHAR(20),
        NAME VARCHAR(10),
        AMOUNT NUMERIC(10,2),
        DATE VARCHAR(20),
        ADDRESS VARCHAR(128),
        primary key (ID)
    )
    ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
    
INSERT INTO t_credit(ID,ACCOUNTID,NAME,AMOUNT,DATE,ADDRESS) VALUES('1','4047390012345678','tom',100.00,'2013-2-2 12:00:08','Lu Jia Zui road');
INSERT INTO t_credit(ID,ACCOUNTID,NAME,AMOUNT,DATE,ADDRESS) VALUES('2','4047390012345678','tom',320.00,'2013-2-3 10:35:21','Lu Jia Zui road');
INSERT INTO t_credit(ID,ACCOUNTID,NAME,AMOUNT,DATE,ADDRESS) VALUES('3','4047390012345678','tom',674.70,'2013-2-6 16:26:49','South Linyi road');
INSERT INTO t_credit(ID,ACCOUNTID,NAME,AMOUNT,DATE,ADDRESS) VALUES('4','4047390012345678','tom',793.20,'2013-2-9 15:15:37','Longyang road');
INSERT INTO t_credit(ID,ACCOUNTID,NAME,AMOUNT,DATE,ADDRESS) VALUES('5','4047390012345678','tom',360.00,'2013-2-11 11:12:38','Longyang road');

demo29-batch-mysql.properties：

datasource.driver=com.mysql.jdbc.Driver
datasource.url=jdbc:mysql://127.0.0.1:3306/spring_batch_demo1?serverTimezone=UTC
datasource.username=root
datasource.password=12345

3.运行结果