首页 > 代码库 > MyBatis----延迟加载demo
MyBatis----延迟加载demo
一:创建数据库脚本
drop table project_info; drop table status; create table status( id number(10) primary key, name varchar2(20) not null ); create table project_info( id number(10) primary key, project_name varchar2(100) not null, start_date date not null, end_date date not null, status_id number(10) references status(id) ); drop sequence seq_status; drop sequence seq_projectinfo; create sequence seq_status; create sequence seq_projectinfo; insert into status(id,name)values(seq_status.nextval,‘已申报‘); insert into status(id,name)values(seq_status.nextval,‘审核中‘); insert into status(id,name)values(seq_status.nextval,‘已审核‘); insert into project_info(id,project_name,start_date,end_date,status_id)values(seq_projectinfo.nextval,‘北京社会科学院2017年申报‘,to_date(‘2017=04-02‘,‘yyyy-MM-dd‘),to_date(‘2017=04-03‘,‘yyyy-MM-dd‘),1); insert into project_info(id,project_name,start_date,end_date,status_id)values(seq_projectinfo.nextval,‘福建社会科学院2017年申报‘,to_date(‘2017=04-04‘,‘yyyy-MM-dd‘),to_date(‘2017=04-05‘,‘yyyy-MM-dd‘),1); insert into project_info(id,project_name,start_date,end_date,status_id)values(seq_projectinfo.nextval,‘上海社会科学院2017年申报‘,to_date(‘2017=04-06‘,‘yyyy-MM-dd‘),to_date(‘2017=04-07‘,‘yyyy-MM-dd‘),1);
二:项目目录结构
三:在src下创建jdbc.properties
driver=oracle.jdbc.driver.OracleDriver url=jdbc:oracle:thin:@127.0.0.1:1521:orcl username=system password=orcl
四:在src下创建log4j.properties
log4j.rootLogger=DEBUG, Console #Console log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n log4j.logger.java.sql.ResultSet=INFO log4j.logger.org.apache=INFO log4j.logger.java.sql.Connection=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG
五:在src下创建mybatis-config.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> <properties resource="jdbc.properties"/> <settings> <!-- 开启延时加载开关 --> <setting name="lazyLoadingEnabled" value="http://www.mamicode.com/true"/> <!-- 设置延时加载 --> <setting name="aggressiveLazyLoading" value="http://www.mamicode.com/false"/> </settings> <typeAliases> <typeAlias type="com.pojo.ProjectInfo" alias="ProjectInfo"/> <typeAlias type="com.pojo.Status" alias="Status"/> </typeAliases> <environments default="developement"> <environment id="developement"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="http://www.mamicode.com/${driver}"/> <property name="url" value="http://www.mamicode.com/${url}"/> <property name="username" value="http://www.mamicode.com/${username}"/> <property name="password" value="http://www.mamicode.com/${password}"/> </dataSource> </environment> </environments> <mappers> <mapper resource="com/mapper/ProjectInfoMapper.xml"/> </mappers> </configuration>
MyBatis----延迟加载demo
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。