Java实现mybatis批量插入数据到Oracle

Z时代
2024-01-10
分类：IT

最近项目中遇到一个问题：导入数据到后台并将数据插入到数据库中，导入的数据量有上万条数据，考虑采用批量插入数据的方式；

结合网上资料，写了个小demo，文章末尾附上demo下载地址

1、新建项目：项目目录结构如下图所示，添加相应的jar包

2、新建数据库表：ACCOUNT_INFO


CREATE TABLE ACCOUNT_INFO (
 "ID" NUMBER(12) NOT NULL ,
 "USERNAME" VARCHAR2(64 BYTE) NULL ,
 "PASSWORD" VARCHAR2(64 BYTE) NULL ,
 "GENDER" CHAR(1 BYTE) NULL ,
 "EMAIL" VARCHAR2(64 BYTE) NULL ,
 "CREATE_DATE" DATE NULL 
)

3、创建AccountInfo实体类：


package com.oracle.entity;
import java.sql.Date;
public class AccountInfo {
 private Long id;
 private String userName;
 private String password;
 private String gender;
 private String email;
 private Date createDate;
 public Long getId() {
 return id;
 }
 public void setId(Long id) {
 this.id = id;
 }
 public String getUserName() {
 return userName;
 }
 public void setUserName(String userName) {
 this.userName = userName;
 }
 public String getPassword() {
 return password;
 }
 public void setPassword(String password) {
 this.password = password;
 }
 public String getGender() {
 return gender;
 }
 public void setGender(String gender) {
 this.gender = gender;
 }
 public String getEmail() {
 return email;
 }
 public void setEmail(String email) {
 this.email = email;
 }
 public Date getCreateDate() {
 return createDate;
 }
 public void setCreateDate(Date createDate) {
 this.createDate = createDate;
 }
 @Override
 public String toString() {
 return "AccountInfo [id=" + id + ", userName=" + userName
 + ", password=" + password + ", gender=" + gender + ", email="
 + email + ", createDate=" + createDate + "]";
 }
}

4、新建接口映射类：AccountInfoMapper.java


package com.oracle.mapper;
import java.util.List;
import com.oracle.entity.AccountInfo;
public interface AccountInfoMapper {
 /**
 * 查询所有的数据
 * @return
 */
 List<AccountInfo> queryAllAccountInfo();
 /**
 * 批量插入数据
 * 
 * @param accountInfoList
 * @return
 */
 int batchInsertAccountInfo(List<AccountInfo> accountInfoList);
}

5、创建mybatis配置文件：mybatis-configuration.xml


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
 <environments default="development">
 <environment id="development">
 <transactionManager type="JDBC" />
 <dataSource type="POOLED">
 <property name="driver" value="oracle.jdbc.driver.OracleDriver" />
 <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
 <property name="username" value="xxx" />
 <property name="password" value="xxx" />
 </dataSource>
 </environment>
 </environments>
 <mappers>
 <mapper resource="config/AccountInfoMapper.xml" />
 </mappers>
</configuration>

6、创建接口映射配置文件：AccountInfoMapper.xml

Oracle的批量插入数据库跟MySQL不一样，

MySQL：

代码如下:

 INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE)values(,,,,,,)(,,,,,,,)

Oracle：

代码如下:

INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE) (select 1,,,,,, from dual union all select 1,,,,,, from dual) 


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.oracle.mapper.AccountInfoMapper"><!-- 接口的全类名 -->
 <!-- type:实体类的全类名 -->
 <resultMap id="BaseResultMap" type="com.oracle.entity.AccountInfo">
 <id column="ID" property="id" jdbcType="DECIMAL" />
 <result column="USERNAME" property="userName" jdbcType="VARCHAR" />
 <result column="PASSWORD" property="password" jdbcType="VARCHAR" />
 <result column="GENDER" property="gender" jdbcType="CHAR" />
 <result column="EMAIL" property="email" jdbcType="VARCHAR" />
 <result column="CREATE_DATE" property="createDate" jdbcType="DATE" />
 </resultMap>
 <!-- id 跟接口中的方法名称保持一致 -->
 <select id="queryAllAccountInfo" resultMap="BaseResultMap">
 select ID,
 USERNAME,PASSWORD,
 GENDER, EMAIL, CREATE_DATE from ACCOUNT_INFO
 </select>
 <insert id="batchInsertAccountInfo" parameterType="java.util.List">
 INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE)
 (
 <foreach collection="list" index="" item="accountInfo"
 separator="union all">
 select
 #{accountInfo.id},
 #{accountInfo.userName},
 #{accountInfo.password},
 #{accountInfo.gender},
 #{accountInfo.email},
 #{accountInfo.createDate}
 from dual
 </foreach>
 )
 </insert>
</mapper>

7、编写测试类：


package com.oracle.test;
import java.io.InputStream;
import java.sql.Date;
import java.util.ArrayList;
import java.util.List;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.oracle.entity.AccountInfo;
import com.oracle.mapper.AccountInfoMapper;
public class MybatisTest {
 public static void main(String[] args) throws Exception {
 String resource = "config/mybatis-configuration.xml";
 InputStream inputStream = Resources.getResourceAsStream(resource);
 SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder()
 .build(inputStream);
 SqlSession session = sessionFactory.openSession();
 AccountInfoMapper mapper = session.getMapper(AccountInfoMapper.class);
 List<AccountInfo> accountInfoList = mapper.queryAllAccountInfo();
 if (accountInfoList == null) {
 System.out.println("The result is null.");
 } else {
 for (AccountInfo personInfo : accountInfoList) {
 System.out.println(personInfo);
 }
 }
 mapper.batchInsertAccountInfo(generateData());
 session.commit();
 }
 static List<AccountInfo> generateData(){
 List<AccountInfo> result = new ArrayList<AccountInfo>();
 AccountInfo account = new AccountInfo();
 account.setId(3L);
 account.setUserName("zhangsanfeng");
 account.setPassword("123456");
 account.setGender("1");
 account.setEmail("zhangsanfeng@wudang.com");
 account.setCreateDate(new Date(System.currentTimeMillis()));
 result.add(account);
 account = new AccountInfo();
 account.setId(4L);
 account.setUserName("zhouzhiruo");
 account.setPassword("zhangwuji");
 account.setGender("0");
 account.setEmail("zhouzhiruo@emei.com");
 account.setCreateDate(new Date(System.currentTimeMillis()));
 result.add(account);
 account = new AccountInfo();
 account.setId(5L);
 account.setUserName("zhaomin");
 account.setPassword("zhangwuji");
 account.setGender("0");
 account.setEmail("zhaomin@yuan.com");
 account.setCreateDate(new Date(System.currentTimeMillis()));
 result.add(account);
 return result;
 }
}