最近項目中遇到一個問題：導入數據到后臺并將數據插入到數據庫中，導入的數據量有上萬條數據，考慮采用批量插入數據的方式；
結合網上資料，寫了個小demo，文章末尾附上demo下載地址
1、新建項目：項目目錄結構如下圖所示，添加相應的jar包
2、新建數據庫表：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、創建AccountInfo實體類：
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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、新建接口映射類：AccountInfoMapper.java
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package com.oracle.mapper;import java.util.List;import com.oracle.entity.AccountInfo;public interface AccountInfoMapper { /** * 查詢所有的數據 * @return */ List<AccountInfo> queryAllAccountInfo(); /** * 批量插入數據 * * @param accountInfoList * @return */ int batchInsertAccountInfo(List<AccountInfo> accountInfoList);} |
5、創建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、創建接口映射配置文件：AccountInfoMapper.xml
Oracle的批量插入數據庫跟MySQL不一樣，
MySQL：
復制代碼 代碼如下:
INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE)values(,,,,,,)(,,,,,,,)
Oracle：
復制代碼 代碼如下:
INSERT INTO ACCOUNT_INFO(ID, USERNAME,PASSWORD,GENDER, EMAIL,CREATE_DATE) (select 1,,,,,, from dual union all select 1,,,,,, from dual)
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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"><!-- 接口的全類名 --> <!-- type:實體類的全類名 --> <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 跟接口中的方法名稱保持一致 --> <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、編寫測試類：
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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.setCreateDate(new Date(System.currentTimeMillis())); result.add(account); account = new AccountInfo(); account.setId(4L); account.setUserName("zhouzhiruo"); account.setPassword("zhangwuji"); account.setGender("0"); 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.setCreateDate(new Date(System.currentTimeMillis())); result.add(account); return result; }} |
源碼下載：java-oracle.rar
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