springMVC+spring+Mybatis
浏览数：32 /
时间：2015年06月08日
一、小工具:
fastJson：温少的json小工具，打印非常好用
JsonView: json查看工具
d
二、项目配置
1.pom.xml
注意：spring包尽量置前，防止包依赖旧版本
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>sy.testmybatis</groupId> <artifactId>testmybatis</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>testmybatis Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>3.2.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>3.2.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.2.0.RELEASE</version> </dependency> <dependency> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.17</version> <!-- <configuration> <testFailureIgnore>true</testFailureIgnore> </configuration> --> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.1.1</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.21</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>0.2.9</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.7.1</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.11</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>3.0-alpha-1</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.1.26</version> </dependency> </dependencies> <build> </build> </project>
2.web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>mybatis</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value> </context-param> <filter> <description>字符集过滤器</description> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <description>字符集编码</description> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <description>spring监听器</description> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 防止spring内存溢出监听器 --> <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> <!-- spring mvc servlet --> <servlet> <description>spring mvc servlet</description> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <description>spring mvc 配置文件</description> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <!-- 配置session超时时间，单位分钟 --> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>
3.spring.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" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd"> <!-- 引入属性文件 --> <context:property-placeholder location="classpath:config.properties" /> <!-- 自动扫描(自动注入) --> <context:component-scan base-package="sy.service" /> </beans>
4.spring-mybatis.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
">
<!-- JNDI方式配置数据源 -->
<!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> -->
<!-- 配置数据源 -->
<bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${jdbc_url}" />
<property name="username" value="${jdbc_username}" />
<property name="password" value="${jdbc_password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="0" />
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
<!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> -->
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒，也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<!-- 监控数据库 -->
<!-- <property name="filters" value="stat" /> -->
<property name="filters" value="mergeStat" />
</bean>
<!-- myBatis文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 -->
<property name="mapperLocations" value="classpath:sy/mapping/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="sy.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 注解方式配置事物 -->
<!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
<!-- 拦截器方式配置事物 -->
<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="append*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update*" propagation="REQUIRED" />
<tx:method name="modify*" propagation="REQUIRED" />
<tx:method name="edit*" propagation="REQUIRED" />
<tx:method name="delete*" propagation="REQUIRED" />
<tx:method name="remove*" propagation="REQUIRED" />
<tx:method name="repair" propagation="REQUIRED" />
<tx:method name="delAndRepair" propagation="REQUIRED" />
<tx:method name="get*" propagation="SUPPORTS" />
<tx:method name="find*" propagation="SUPPORTS" />
<tx:method name="load*" propagation="SUPPORTS" />
<tx:method name="search*" propagation="SUPPORTS" />
<tx:method name="datagrid*" propagation="SUPPORTS" />
<tx:method name="*" propagation="SUPPORTS" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* sy.service..*Impl.*(..))" />
<aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
</aop:config>
<!-- 配置druid监控spring jdbc -->
<bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
</bean>
<bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
<property name="patterns">
<list>
<value>sy.service.*</value>
</list>
</property>
</bean>
<aop:config>
<aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
</aop:config>
</beans>
5. spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"> <!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 --> <context:component-scan base-package="sy.controller" /> <!-- 避免IE执行AJAX时,返回JSON出现下载文件 --> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 --> </list> </property> </bean> <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" /> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding"> <value>UTF-8</value> </property> <property name="maxUploadSize"> <value>32505856</value> <!-- 上传文件大小限制为31M，31*1024*1024 --> </property> <property name="maxInMemorySize"> <value>4096</value> </property> </bean> </beans>
三、mybatis使用：crud操作及如何获取关联对象（用户和角色通过中间表多对多关联）
1.mybatis generator使用
1.1 generator配置：
<generatorConfiguration> <!-- 数据库驱动包位置 --> <!-- <classPathEntry location="D:\software\lib\mysql-connector-java-5.1.21.jar" /> --> <classPathEntry location="C:\oracle\product\10.2.0\db_1\jdbc\lib\ojdbc14.jar" /> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressAllComments" value="true" /> </commentGenerator> <!-- 数据库链接URL、用户名、密码 --> <!-- <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/sy" userId="sypro" password="sypro"> --> <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- 生成模型的包名和位置 --> <javaModelGenerator targetPackage="sy.model" targetProject="D:\study\mybatis\src"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- 生成的映射文件包名和位置 --> <sqlMapGenerator targetPackage="sy.mapping" targetProject="D:\study\mybatis\src"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!-- 生成DAO的包名和位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="sy.dao" targetProject="D:\study\mybatis\src"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!-- 要生成那些表(更改tableName和domainObjectName就可以) --> <table tableName="trole" domainObjectName="Role" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> <table tableName="tuser" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> <table tableName="tuser_trole" domainObjectName="UserRole" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> </context> </generatorConfiguration>
1.2 generater 生成
java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite
2.映射文件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="sy.dao.UserMapper">
<resultMap id="BaseResultMap" type="sy.model.User">
<id column="ID" property="id" jdbcType="VARCHAR" />
<result column="CREATEDATETIME" property="createdatetime" jdbcType="TIMESTAMP" />
<result column="MODIFYDATETIME" property="modifydatetime" jdbcType="TIMESTAMP" />
<result column="NAME" property="name" jdbcType="VARCHAR" />
<result column="PWD" property="pwd" jdbcType="VARCHAR" />
<result column="CREATE_TIME" property="createTime" jdbcType="DATE" />
<result column="UPDATE_TIME" property="updateTime" jdbcType="DATE" />
</resultMap>
<sql id="Base_Column_List">
ID, CREATEDATETIME, MODIFYDATETIME, NAME, PWD, CREATE_TIME, UPDATE_TIME
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String">
select
<include refid="Base_Column_List" />
from tuser
where ID = #{id,jdbcType=VARCHAR}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.String">
delete from tuser
where ID = #{id,jdbcType=VARCHAR}
</delete>
<insert id="insert" parameterType="sy.model.User">
insert into tuser (ID, CREATEDATETIME, MODIFYDATETIME,
NAME, PWD, CREATE_TIME,
UPDATE_TIME)
values (#{id,jdbcType=VARCHAR}, #{createdatetime,jdbcType=TIMESTAMP}, #{modifydatetime,jdbcType=TIMESTAMP},
#{name,jdbcType=VARCHAR}, #{pwd,jdbcType=VARCHAR}, #{createTime,jdbcType=DATE},
#{updateTime,jdbcType=DATE})
</insert>
<insert id="insertSelective" parameterType="sy.model.User">
insert into tuser
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="id != null">
ID,
</if>
<if test="createdatetime != null">
CREATEDATETIME,
</if>
<if test="modifydatetime != null">
MODIFYDATETIME,
</if>
<if test="name != null">
NAME,
</if>
<if test="pwd != null">
PWD,
</if>
<if test="createTime != null">
CREATE_TIME,
</if>
<if test="updateTime != null">
UPDATE_TIME,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="id != null">
#{id,jdbcType=VARCHAR},
</if>
<if test="createdatetime != null">
#{createdatetime,jdbcType=TIMESTAMP},
</if>
<if test="modifydatetime != null">
#{modifydatetime,jdbcType=TIMESTAMP},
</if>
<if test="name != null">
#{name,jdbcType=VARCHAR},
</if>
<if test="pwd != null">
#{pwd,jdbcType=VARCHAR},
</if>
<if test="createTime != null">
#{createTime,jdbcType=DATE},
</if>
<if test="updateTime != null">
#{updateTime,jdbcType=DATE},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="sy.model.User">
update tuser
<set>
<if test="createdatetime != null">
CREATEDATETIME = #{createdatetime,jdbcType=TIMESTAMP},
</if>
<if test="modifydatetime != null">
MODIFYDATETIME = #{modifydatetime,jdbcType=TIMESTAMP},
</if>
<if test="name != null">
NAME = #{name,jdbcType=VARCHAR},
</if>
<if test="pwd != null">
PWD = #{pwd,jdbcType=VARCHAR},
</if>
<if test="createTime != null">
CREATE_TIME = #{createTime,jdbcType=DATE},
</if>
<if test="updateTime != null">
UPDATE_TIME = #{updateTime,jdbcType=DATE},
</if>
</set>
where ID = #{id,jdbcType=VARCHAR}
</update>
<update id="updateByPrimaryKey" parameterType="sy.model.User">
update tuser
set CREATEDATETIME = #{createdatetime,jdbcType=TIMESTAMP},
MODIFYDATETIME = #{modifydatetime,jdbcType=TIMESTAMP},
NAME = #{name,jdbcType=VARCHAR},
PWD = #{pwd,jdbcType=VARCHAR},
CREATE_TIME = #{createTime,jdbcType=DATE},
UPDATE_TIME = #{updateTime,jdbcType=DATE}
where ID = #{id,jdbcType=VARCHAR}
</update>
<!-- N+1查询问题 -->
<select id="selectUserRole" parameterType="java.lang.String" resultType="sy.model.UserRole">
SELECT
tuser_trole.ID,
tuser_trole.ROLE_ID,
tuser_trole.USER_ID
FROM
tuser_trole
where tuser_trole.user_id=#{id,jdbcType=VARCHAR}
</select>
<resultMap type="sy.model.User" id="userResultMap" extends="BaseResultMap">
<collection property="userRoles" column="ID" javaType="list" select="selectUserRole" />
</resultMap>
<select id="getAll" resultMap="userResultMap">
select ID, CREATEDATETIME, MODIFYDATETIME, NAME, PWD from tuser
</select>
<resultMap type="sy.model.User" id="userResultMap2" extends="BaseResultMap">
<collection property="userRoles" javaType="list" ofType="sy.model.UserRole">
<id property="id" column="userrole_id" />
<result column="role_id" property="roleId" />
<result property="userId" column="user_id" />
</collection>
</resultMap>
<select id="getAll2" resultMap="userResultMap2">
SELECT
tuser.ID,
tuser.CREATEDATETIME,
tuser.MODIFYDATETIME,
tuser.`NAME`,
tuser.PWD,
tuser.CREATE_TIME,
tuser.UPDATE_TIME,
tuser_trole.ID userrole_id,
tuser_trole.ROLE_ID role_id,
tuser_trole.USER_ID user_id
FROM
tuser
JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
</select>
<!-- 通过中间表对象UserRole获取角色 -->
<resultMap type="sy.model.User" id="userResultMap3" extends="BaseResultMap">
<collection property="userRoles" javaType="list" ofType="sy.model.UserRole">
<id property="id" column="userrole_id" />
<result column="role_id" property="roleId" />
<result property="userId" column="user_id" />
<association property="role" javaType="sy.model.Role">
<id property="id" column="role_id" />
<result property="text" column="role_text" />
</association>
</collection>
</resultMap>
<select id="getAll3" resultMap="userResultMap3">
SELECT
tuser.ID,
tuser.CREATEDATETIME,
tuser.MODIFYDATETIME,
tuser.`NAME`,
tuser.PWD,
tuser.CREATE_TIME,
tuser.UPDATE_TIME,
tuser_trole.ID userrole_id,
tuser_trole.ROLE_ID role_id,
tuser_trole.USER_ID user_id,
trole.ID role_id,
trole.TEXT role_text
FROM
tuser
JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
JOIN trole ON tuser_trole.ROLE_ID = trole.ID
</select>
<!-- 直接获取角色，中间表对象UserRole -->
<resultMap type="sy.model.User" id="userResultMap4" extends="BaseResultMap">
<collection property="roles" javaType="list" ofType="sy.model.Role">
<id property="id" column="role_id" />
<result property="text" column="role_text" />
</collection>
</resultMap>
<select id="getAll4" resultMap="userResultMap4">
SELECT
tuser.ID,
tuser.CREATEDATETIME,
tuser.MODIFYDATETIME,
tuser.`NAME`,
tuser.PWD,
tuser.CREATE_TIME,
tuser.UPDATE_TIME,
tuser_trole.ID userrole_id,
tuser_trole.ROLE_ID,
tuser_trole.USER_ID,
trole.ID role_id,
trole.TEXT role_text
FROM
tuser
JOIN tuser_trole ON tuser.ID = tuser_trole.USER_ID
JOIN trole ON tuser_trole.ROLE_ID = trole.ID
</select>
</mapper>
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