Struts2+Spring+Mybatis框架集成的搭建。（SSM形式）

时间：2021-09-30 18:36:07

1. jar包
struts2：相关jar
spring：相关加入
struts2-spring-plugin.jar：spring和struts集成jar
mybatis：相关jar
mysql：数据库驱动包（这里用mysql作为样本）
mybatis-spring-1.2.1.jar：mybatis和spring集成jar
dbcp：database连接池
jstl：c标签（前台）
junit：测试相关
如果还需其他jar，自己加

2. 首先配置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" 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>SSM</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<!-- 配置Spring监视器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath：applicationContext.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- 配置strtus请求过滤器 -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>

</web-app>

3. 配置连接数据库参数： jdbc.properties

username=root
password=123
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssm

4. 配置Spring主配置文件(就是Spring监视器中的location)

<?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.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">

<!-- 注解扫描路径 -->
<context:component-scan base-package="com.spring_struts"></context:component-scan>

<!-- 解析datasource -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath:jdbc.properties"></property>
</bean>

<bean class="org.apache.commons.dbcp2.BasicDataSource" id="dataSource" destroy-method="close">
<property name="url" value="${url}"></property>
<property name="username" value="${username}"></property>
<property name="driverClassName" value="${driverClassName}"></property>
<property name="password" value="${password}"></property>
</bean>

<!-- 以下两个是Mybatis配置文件 -->
<!-- 配置自定义注解映射扫描范围和名称 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="mapperScannerConfigurer">
<!-- 用到自定义注解类的包 -->
<property name="basePackage" value="com.spring_struts.mapper"></property>
<!-- 自定义注解 -->
<property name="annotationClass" value="com.spring_struts.annotation.MybatisAnotation"></property>
</bean>

<!-- 配置SqlSessionFactoryBean -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">
<!-- 配置datasource -->
<property name="dataSource" ref="dataSource"></property>
<!-- 如果一个包下有多个， -->
<property name="mapperLocations" value="classpath:com/spring_struts/mapper/mapperxml/*.xml"></property>
<!-- 主配置文件（可以配置别名） -->
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
</bean>

</beans>

5. 创建struts.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="user_default" extends="struts-default" namespace="/user" >
<!-- 这里的class是spring中@Controller中bean别名 -->
<action name="findall" class="userAction">
<result>/WEB-INF/jsp/userlist.jsp</result>
</action>
<!-- 这里的class是@controller 类的 Javabean 的 ID -->
<action name="add" class="userAction" method="addUser">
<result type="chain">findall</result>
</action>
<action name="delete" class="userAction" method="delete">
<result type="chain" >findall</result>
</action>
</package>
</struts>

6.注解类 com.spring_struts.annotation.MybatisAnotation： 

package com.spring_struts.annotation;

public @interface MybatisAnotation {
//定义属性,类名称
    String value() default "";
}

7.Mybatis接口：Mapper.java

package com.spring_struts.mapper;
import java.util.List;
import com.spring_struts.annotation.MybatisAnotation;
import com.spring_struts.entity.User;

//自定义的注解
@MybatisAnotation
public interface Mapper {

public List<User> findAll();

public void addUser(String uname);

public void delete(User user);

public void dele(int id);
}

8.Mybatis的xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" 
 "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<!-- 接口名 -->
<mapper namespace="com.spring_struts.mapper.Mapper">

<select id="findAll" resultType="com.spring_struts.entity.User">
        select * from t_user    
</select>

<insert id="addUser" parameterType="java.lang.String">
        insert into t_user values(null,#{uname})
</insert>

<update id="delete" parameterType="com.spring_struts.entity.User">
        update t_user set uname=#{uname} where id=#{id}
</update> 

<delete id="dele" parameterType="int">
        delete from t_user where id=#{id}
</delete> 
</mapper>

9.mybatis主配置文件：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN" 
 "http://ibatis.apache.org/dtd/ibatis-3-config.dtd">

<configguration>
<!-- 配置别名 -->
<typeAliases>
<typeAlias type="com.ssm.entity.Emp" alias="emp"/>
</typeAliases>
<!-- 
 配置Mybatis映射文件 
 <mappers>
 <mapper resource="com/ssm/mapper/mapperxml/*.xml"/>
 </mappers> 
 -->
</configguration>

注意：在Struts的Action中，要是使用注解 @Controller(“userAction”)

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