java web开发入门八（ssm整合）基于intellig idea
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ssm整合
一、导入相关包
二、开发流程
1.写entity
package com.eggtwo.euq.entity; import java.io.Serializable; import java.math.BigDecimal; import java.util.Date; public class Member { private int id; public int getId() { return id; } public void setId(int id) { this.id = id; } private String name; private int age; private Date birthday; private boolean man; private BigDecimal score; public BigDecimal getScore() { return score; } public void setScore(BigDecimal score) { this.score = score; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public boolean isMan() { return man; } public void setMan(boolean man) { this.man = man; } @Override public String toString() { return "Member{" + "id=" + id + ", name=\'" + name + \'\\\'\' + ", age=" + age + ", birthday=" + birthday + ", man=" + man + ", score=" + score + \'}\'; } }
2.配mapper.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"> <!--映射文件命名空间：要唯一--> <mapper namespace="com.eggtwo.euq.dao.MemberDao"> <!-- *******当实体属性和表字段名称一致的话resultMap标签可以省略******** resultMap标签：映射实体和表关系 id:映射关系id,要唯一 type:实体全路径 --> <resultMap id="memberMap" type="com.eggtwo.euq.entity.Member"> <!--id：映射主键属性 result:映射非主键属性 property:实体属性名称 column:表字段名称 --> <id property="id" column="id"/> <result property="name" column="name"/> <result property="age" column="age"/> <result property="birthday" column="birthday"/> <result property="man" column="man"/> <result property="score" column="score"/> </resultMap> <insert id="add" parameterType="com.eggtwo.euq.entity.Member" useGeneratedKeys="true" keyProperty="id"> insert into t_member(name,age,birthday,man,score) values(#{name},#{age},#{birthday},#{man},#{score}) </insert> <update id="update" parameterType="com.eggtwo.euq.entity.Member"> update t_member set name = #{name}, age = #{age}, birthday = #{birthday}, man = #{man}, score = #{score} where id = #{id} </update> <delete id="delete" parameterType="int"> delete from t_member where id = #{id} </delete> <!-- <select id="getById" parameterType="int" resultType="com.eggtwo.entity.Member">--> <!--resultType使用mybatis.xml中设置的别名，这样可以简化难度--> <select id="getById" parameterType="int" resultMap="memberMap"> select id,name,age,birthday,man,score from t_member where id=#{id} </select> <!-- 理论上resultType的值应该是:List<com.eggtwo.entity.Member> 实际上只需要写List集合中的类型就可以 --> <select id="getAll" resultMap="memberMap"> select * from t_member </select> <!--分页：多参数的写法--> <select id="getPageList" parameterType="map" resultMap="memberMap"> select id,name,age,birthday,man,score from t_member limit #{start},#{size} </select> <!--多条件查询--> <select id="getListByWhere" parameterType="map" resultMap="memberMap"> select id,name,age,birthday,man,score from t_member <where> <if test="name!=null and name!=\'\'"> and name like #{name} </if> <if test="score!=null"> and score > #{score} </if> </where> </select> <!--动态更新：可以支持部分字段更新--> <update id="dynamicUpdate" parameterType="map"> update t_member <set> <if test="name!=null"> name = #{name}, </if> <if test="age!=null"> age = #{age}, </if> <if test="birthday!=null"> birthday = #{birthday}, </if> <if test="man!=null"> man = #{man}, </if> <if test="score!=null"> score = #{score}, </if> </set> where id=#{id} </update> <!--根据ids数组批量删除数据--> <delete id="batchDelete" > delete from t_member where id in <!-- 循环数组 解析成：(1,2,34) #id表示数组中的每一个元素，名称可以任意写 --> <foreach collection="array" open="(" close=")" separator="," item="id"> #{id} </foreach> </delete> <!--根据ids列表批量删除数据--> <delete id="batchDeleteList" > delete from t_member where id in <!-- 循环数组 解析成：(1,2,34) #id表示数组中的每一个元素，名称可以任意写 --> <foreach collection="list" open="(" close=")" separator="," item="id"> #{id} </foreach> </delete> </mapper>
3.配mybatis.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> <!--配置类的别名：使用type的地方可以直接写alias的值--> <typeAliases> <!--用类名做别名--> <package name="com.eggtwo.euq.entity"/> </typeAliases> </configuration>
4.编写dao
package com.eggtwo.euq.dao; import com.eggtwo.euq.entity.Member; public interface MemberDao { public void add(Member member); }
4.1编写service
package com.eggtwo.euq.service; import com.eggtwo.euq.dao.MemberDao; import com.eggtwo.euq.entity.Member; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import javax.annotation.Resource; //用注解实现IOC @Service("memberService") public class MemberService { @Autowired private MemberDao memberDao; public void add(Member member) throws Exception { memberDao.add(member); // int a = 3 / 0; } }
5.配置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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/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/mvc http://www.springframework.org/schema/tx/spring-mvc.xsd "> <!-- 配置C3P0连接池,目的：管理数据库连接 --> <bean id="comboPooledDataSourceID" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver"/> <property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8"/> <property name="user" value="root"/> <property name="password" value="123456"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30" /> <property name="minPoolSize" value="10" /> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false" /> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000" /> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2" /> </bean> <!-- 配置SqlSessionFactoryBean，目的：加载mybaits配置文件和映射文件，即替代原Mybatis工具类的作用 --> <bean id="sqlSessionFactoryBeanID" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="comboPooledDataSourceID"/> <!--加载mybatis.xml文件--> <property name="configLocation" value="classpath:mybatis.cfg.xml"/> <!--配置扫描式加载sql映射文件，去掉mybatis.xml中的mappers--> <property name="mapperLocations" value="classpath:com/eggtwo/euq/entity/*.xml"/> </bean> <!-- 配置Mybatis的事务管理器，即因为Mybatis底层用的是JDBC事务管事器，所以在这里依然配置JDBC事务管理器 --> <bean id="dataSourceTransactionManagerID" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="comboPooledDataSourceID"/> </bean> <!-- 配置事务通知，即让哪些方法需要事务支持 --> <tx:advice id="tx" transaction-manager="dataSourceTransactionManagerID"> <tx:attributes> <!-- 默认只处理运行时异常，可加rollback-for="Exception/Throwable"等处理所有异常或包括错误 --> <tx:method name="add*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="update*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception"/> <tx:method name="*" propagation="SUPPORTS"/> </tx:attributes> </tx:advice> <!-- 配置事务切面，即让哪些包下的类需要事务 --> <aop:config> <!--在service包下面使用事务--> <aop:pointcut id="pointcut" expression="execution(* com.eggtwo.euq.service.*.*(..))"/> <aop:advisor advice-ref="tx" pointcut-ref="pointcut"/> </aop:config> <!-- 配置SessionTemplate，已封装了繁琐的数据操作 --> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBeanID"/> </bean> <!-- 自动扫描组件，要把controller去除，他们是在spring-mvc.xml中配置，如果不去除会影响事务管理。 --> <context:component-scan base-package="com.eggtwo.euq"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 配置 转换器，对于在basePackage设置的包（包括子包）下的接口类， 如果接口类的全类名在Mapper.xml文件中和定义过命名空间一致， 将被转换成spring的BEAN，在调用的地方通过@Autowired方式将可以注入接口实例 --> <!--ps:mappeer.xml中的namespace="com.eggtwo.euq.dao.MemberDao 标签：id="add" servcie中的类在调用dao中的方法时会查找（dao.way=com.eggtwo.euq.dao.MemberDao.add） --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactory" ref="sqlSessionFactoryBeanID"/> <property name="basePackage" value="com.eggtwo.euq.dao"/> </bean> </beans>
6.配置springmvc.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" 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/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/mvc http://www.springframework.org/schema/tx/spring-mvc.xsd "> <!-- 注册Action：自动扫描 单例模式--> <context:component-scan base-package="com.eggtwo.euq.action" /> <!-- 通知springioc容器这些注解的作用 --> <context:annotation-config/> <!--注解映射器：可省略--> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> <!--视图解析器--> <!-- 如果Action中书写的是视图逻辑名称，那么视图解析器就必须配置 如果Action中书写的是视图真实名称，那么视图解析器就不能配置 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 路径前缀 --> <property name="prefix" value="/WEB-INF/jsp/"/> <!-- 路径后缀 --> <property name="suffix" value=".jsp"/> <!-- 前缀+视图逻辑名+后缀=真实路径 --> </bean> <!-- 注册json解析适配器 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/> </list> </property> </bean> <!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"/> <property name="maxUploadSize" value="10485760000"/> <property name="maxInMemorySize" value="40960"/> </bean> </beans>
7.配置web.xml