Maven_Spring_Mybatis 实例
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Linux_Mysql 安装笔记
BaseModel.java
package com.demo.base;public class BaseModel { private int pageNum = 1; private int pageSize = 10; public BaseModel() { super(); } public BaseModel(int pageNum, int pageSize) { super(); this.pageNum = pageNum; this.pageSize = pageSize; } public int getPageNum() { return pageNum; } public void setPageNum(int pageNum) { this.pageNum = pageNum; } public int getPageSize() { return pageSize; } public void setPageSize(int pageSize) { this.pageSize = pageSize; }}BaseDao.java
package com.demo.dao;import java.util.List;public interface BaseDao<T> { public T queryById(Object id); public int queryCount(); public List<T> queryAll(); public int add(T t); public int update(T t); public int updateBySelective(T t); public int delete(Object id);}UserDao.java
package com.demo.dao;import com.demo.dao.BaseDao;public interface UserDao<T> extends BaseDao<T> {}UserMapper.xml
<?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.demo.dao.UserDao"> <!-- Result Map --> <resultMap id="BaseResultMap" type="com.demo.entity.User"> <result column="id" property="id" /> <result column="username" property="username" /> <result column="password" property="password" /> </resultMap> <!-- user table all fields --> <sql id="Base_Column_List"> id, username, password </sql> <!-- 查询条件 --> <sql id="Example_Where_Clause"> WHERE 1=1 <trim suffixOverrides=","> <if test="id != null"> AND id = #{id} </if> <if test="username != null AND username != ''"> AND username = #{username} </if> <if test="password != null AND password != ''"> AND password = #{password} </if> </trim> </sql> <!-- 根据id查询 user --> <select id="queryById" resultMap="BaseResultMap" parameterType="Object"> SELECT <include refid="Base_Column_List" /> FROM user WHERE id = #{id} </select> <!-- user 列表总数 --> <select id="queryCount" resultType="java.lang.Integer"> SELECT count(1) FROM user </select> <!-- 查询user列表 --> <select id="queryAll" resultMap="BaseResultMap"> SELECT <include refid="Base_Column_List" /> FROM user </select> <!-- 插入记录 --> <insert id="add" parameterType="Object"> <selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id"> SELECT LAST_INSERT_ID() </selectKey> INSERT INTO user ( id,username,password) VALUES ( #{id},#{username},#{password}) </insert> <!-- 根据id，修改记录 --> <update id="update" parameterType="Object"> UPDATE user SET username=#{username}, password=#{password} WHERE id = #{id} </update> <!-- 修改记录，只修改只不为空的字段 --> <update id="updateBySelective" parameterType="Object"> UPDATE user SET <trim suffixOverrides=","> <if test="username != null "> username = #{username}, </if> <if test="password != null "> password = #{password}, </if> </trim> WHERE id = #{id} </update> <!-- 删除记录 --> <delete id="delete" parameterType="Object"> DELETE FROM user WHERE id = #{id} </delete></mapper> User.java
package com.demo.entity;public class User { private Integer id; private String username; private String password; public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return this.username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return this.password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "User [id=" + id + ", username=" + username + ", password=" + password + "]"; }}BaseService.java
package com.demo.service;import java.util.List;import org.apache.log4j.Logger;import org.springframework.transaction.annotation.Transactional;import com.demo.base.BaseModel;import com.demo.dao.BaseDao;import com.github.pagehelper.PageHelper;import com.github.pagehelper.PageInfo;public abstract class BaseService<T> { private final static Logger LOGGER = Logger.getLogger(BaseService.class); public abstract BaseDao<T> getDao(); public T queryById(Object id) throws Exception { return getDao().queryById(id); } public int queryCount() throws Exception { return getDao().queryCount(); } public List<T> queryAll() throws Exception { return getDao().queryAll(); } public PageInfo<T> queryByPage(BaseModel page) throws Exception { PageHelper.startPage(page.getPageNum(), page.getPageSize()); return new PageInfo<T>(queryAll()); } @Transactional public int add(T t) throws Exception { return getDao().add(t); } @Transactional public int update(T t) throws Exception { return getDao().update(t); } @Transactional public int updateBySelective(T t) throws Exception { return getDao().updateBySelective(t); } @Transactional public int delete(Object... ids) throws Exception { if (ids == null || ids.length < 1) { return 0; } for (Object id : ids) { return getDao().delete(id); } return 0; } public static Logger getLogger() { return LOGGER; }}UserService.java
package com.demo.service.impl;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.demo.dao.UserDao;import com.demo.service.BaseService;@Service("userService")public class UserService<T> extends BaseService<T> { @Autowired private UserDao<T> dao; public UserDao<T> getDao() { return dao; }}applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/context/spring-jee.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/jpa/spring-jpa.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd"><!-- spring组件扫描 --> <context:component-scan base-package="com.demo"></context:component-scan><!-- 加载配置配置文件 --> <util:properties id="db" location="classpath:mysql.properties"></util:properties><!-- 数据库连接池 --> <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="#{db.driverClassName}"></property> <property name="url" value="#{db.url}"></property> <property name="username" value="#{db.username}"></property> <property name="password" value="#{db.password}"></property> </bean> <!-- 配置entity路径，以及entity类对应的***.xml文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="myDataSource"></property> <property name="mapperLocations" value="classpath:com/demo/dao/mapper/*.xml"></property> <property name="typeAliasesPackage" value="entityPackage"></property> <property name="configLocation" value="classpath:mybatis-config.xml"></property> </bean> <!-- Mapper接口位置配置 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.demo.dao"></property> </bean> <!-- 使用SqlSessionTemplate对象注入，类同HibernateTemplate方式访问数据库 --> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg> </bean> <!-- 声明式事务管理也有两种常用的方式，一种是基于tx和aop名字空间的xml配置文件，另一种就是基于@Transactional注解。 显然基于注解的方式更简单易用，更清爽。 测试回滚：在有@Transactional的方法中抛RuntimeException,而不是Exception --> <tx:annotation-driven transaction-manager="transactionManager" /> <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="myDataSource"></property> </bean></beans>mysql.properties
driverClassName = com.mysql.jdbc.Driverurl = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8username = rootpassword = rootmybatis-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> <!-- ====== 配置PageHelper分页插件的拦截器 ====== plugins在配置文件中的位置必须符合要求，否则会报错，顺序如下: properties?, settings?, typeAliases?, typeHandlers?, objectFactory?,objectWrapperFactory?, plugins?, environments?, databaseIdProvider?, mappers? --> <plugins> <!-- com.github.pagehelper为PageHelper类所在包名 --> <plugin interceptor="com.github.pagehelper.PageHelper"> <!-- 4.0.0以后版本可以不设置该参数 --> <property name="dialect" value="mysql" /> <!-- 该参数默认为false --> <!-- 设置为true时，会将RowBounds第一个参数offset当成pageNum页码使用 --> <!-- 和startPage中的pageNum效果一样 --> <property name="offsetAsPageNum" value="true" /> <!-- 该参数默认为false --> <!-- 设置为true时，使用RowBounds分页会进行count查询 --> <property name="rowBoundsWithCount" value="true" /> <!-- 设置为true时，如果pageSize=0或者RowBounds.limit = 0就会查询出全部的结果 --> <!-- （相当于没有执行分页查询，但是返回结果仍然是Page类型） --> <property name="pageSizeZero" value="true" /> <!-- 3.3.0版本可用 - 分页参数合理化，默认false禁用 --> <!-- 启用合理化时，如果pageNum<1会查询第一页，如果pageNum>pages会查询最后一页 --> <!-- 禁用合理化时，如果pageNum<1或pageNum>pages会返回空数据 --> <property name="reasonable" value="false" /> <!-- 3.5.0版本可用 - 为了支持startPage(Object params)方法 --> <!-- 增加了一个`params`参数来配置参数映射，用于从Map或ServletRequest中取值 --> <!-- 可以配置pageNum,pageSize,count,pageSizeZero,reasonable,orderBy,不配置映射的用默认值 --> <!-- 不理解该含义的前提下，不要随便复制该配置 --> <property name="params" value="pageNum=pageHelperStart;pageSize=pageHelperRows;" /> <!-- 支持通过Mapper接口参数来传递分页参数 --> <property name="supportMethodsArguments" value="false" /> <!-- always总是返回PageInfo类型,check检查返回类型是否为PageInfo,none返回Page --> <property name="returnPageInfo" value="none" /> </plugin> </plugins></configuration>log4j.properites
# log dir#logdir=D:/remote/logs# Global logging configuration, debug < info < warn < error < fatal# log4j.rootLogger = [debug], [info], [warn], [error], [fatal], [stdout]log4j.rootLogger=info, stdout# Console outputlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Target=System.outlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%d{yyy-MM-dd HH:mm:ss } [%t] %5p %c{1}:%L - %m%n# error outputlog4j.appender.error=org.apache.log4j.DailyRollingFileAppender#log4j.appender.error.MaxFileSize=10MB#log4j.appender.error.MaxBackupIndex=10log4j.appender.error.File=${logdir}/error.txtlog4j.appender.error.layout=org.apache.log4j.PatternLayoutlog4j.appender.error.layout.ConversionPattern=%d %-5p (%13F:%L) %3x - %m%n# debug outputlog4j.appender.debug=org.apache.log4j.DailyRollingFileAppender#log4j.appender.debug.MaxFileSize=10MB#log4j.appender.debug.MaxBackupIndex=10log4j.appender.debug.File=${logdir}/debug.txtlog4j.appender.debug.layout=org.apache.log4j.PatternLayoutlog4j.appender.debug.layout.ConversionPattern=%d %-5p (%13F:%L) %3x - %m%n# info outputlog4j.appender.debug=org.apache.log4j.DailyRollingFileAppender#log4j.appender.debug.MaxFileSize=10MB#log4j.appender.debug.MaxBackupIndex=10log4j.appender.debug.File=${logdir}/info.txtlog4j.appender.debug.layout=org.apache.log4j.PatternLayoutlog4j.appender.debug.layout.ConversionPattern=%d %-5p (%13F:%L) %3x - %m%nUserServiceTest.java
package com.demo.test;import java.util.List;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.demo.base.BaseModel;import com.demo.entity.User;import com.demo.service.impl.UserService;import com.github.pagehelper.PageInfo;/* * @TransactionConfiguration(transactionManager="transactionManager",defaultRollback=true) * transactionManager的默认取值是"transactionManager"， * defaultRollback的默认取值是true，当然，你也可以改成false。 * true表示测试不会对数据库造成污染,false的话当然就会改动到数据库中了。 * 在方法名上添加@Rollback(false)表示这个测试用例不需要回滚。 */@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations = { "classpath*:applicationContext.xml" })public class UserServiceTest { private static Object id; @Autowired private UserService<User> userService; @Test public void queryAll() throws Exception { List<User> users = userService.queryAll(); for (User user : users) { System.out.println(user); } } // @Test public void queryByPage() throws Exception { BaseModel page = new BaseModel(2, 2); PageInfo<User> pageInfo = userService.queryByPage(page); for (User user : pageInfo.getList()) { System.out.println(user); } } // @Test public void queryById() throws Exception { User user = userService.queryById(2); System.err.println(user); } // @Test public void add() throws Exception { User user = new User(); userService.add(user); id = user.getId(); System.err.println("添加返回id: " + id); } // @Test public void update() throws Exception { User user = userService.queryById(2); user.setUsername("lisi"); user.setPassword("lzg123"); System.out.println(userService.update(user)); } // @Test public void delete() throws Exception { System.out.println(userService.delete(1)); } // 修改update方法，getDao().update(t)操作后抛异常。 // @Test public void transaction() throws Exception { User user = userService.queryById(2); System.out.println(user); user.setUsername("wangwu"); userService.update(user); User user2 = userService.queryById(2); System.out.println(user2); } // @Test public void queryCount() throws Exception { System.out.println(userService.queryCount()); }}pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.demo</groupId> <artifactId>maven-spring-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <!-- junit单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- spring整合Junit --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.3.0.RELEASE</version> <scope>test</scope> </dependency> <!-- log4j日志--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.21</version> </dependency> <!-- spring上下文 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.0.RELEASE</version> </dependency> <!-- mybatis和spring的支持 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <!-- Mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.0</version> </dependency> <!-- 分页框架 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>4.1.6</version> </dependency> <!-- 数据库dbcp(BasicDataSource) --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- JDBC和事务管理器 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.0.RELEASE</version> </dependency> <!-- 数据库驱动 Driver --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> </dependencies></project>maven-spring-mybatis实例源码
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