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
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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:
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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
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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
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<? 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 = "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:
Oracle:
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<? 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:
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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; } } |
源码下载:java-oracle.rar
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