springbatch学习笔记2：使用批处理操作数据库

在上一篇对springbatch简单有了了解，接下来加入操作数据库操作

需要用到两张表：

 

 

需求：将这两个表的信息按照班级关联并输出为txt文件

1.创建项目引入依赖：

<dependency>
            <groupId>org.springframework.batch</groupId>
            <artifactId>spring-batch-core</artifactId>
            <version>LATEST</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.45</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.11</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper</artifactId>
            <version>3.4.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>

2.编辑实体类，mapper等：

package com.zs.springbatch.model;

import lombok.Data;
import lombok.experimental.Accessors;

import javax.persistence.*;
import java.io.Serializable;

/**
 * create by Mybatis-generator
 */
@Table(name = "batch_class")
@Data
@Accessors(chain = true)
public class BatchClass implements Serializable {
    @Id
    @Column(name = "c_id")
    @GeneratedValue(generator = "JDBC")
    private Long cId;

    @Column(name = "c_name")
    private String cName;

    @Column(name = "c_teacher")
    private String cTeacher;

    private static final long serialVersionUID = 1L;

}

View Code

package com.zs.springbatch.model;

import lombok.Data;
import lombok.experimental.Accessors;

import javax.persistence.*;
import java.io.Serializable;

/**
 * create by Mybatis-generator
 */
@Table(name = "batch_student")
@Data
@Accessors(chain = true)
public class BatchStudent implements Serializable {
    @Id
    @Column(name = "s_id")
    @GeneratedValue(generator = "JDBC")
    private Long sId;

    @Column(name = "s_name")
    private String sName;

    @Column(name = "s_age")
    private String sAge;

    @Column(name = "s_class")
    private String sClass;

    private static final long serialVersionUID = 1L;
}

View Code