概述
搭建Spring + SpringMVC + MyBatis集成环境。
一，依赖的jar
二，配置web.xml
<!-- 开启编码过滤器 -->
<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>
<!-- Spring的监听器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!-- 配置SpringMVC的处理请求的Servlet -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 表示系统启动时自动加载这个servlet -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 设置是否支持put和delete请求 -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>
org.springframework.web.filter.HiddenHttpMethodFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 实现druid监控 -->
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>
之后添加四个配置文件分别是如下：
1.由于MyBatis依赖与log4j输出sql语句信息，所以需要配置log4j.properties配置文件。
#设置输出级别和输出位置 log4j.rootLogger=debug,Console #设置控制台相关的参数 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 #设置MyBatis的输出内容 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
2.添加springmvc.xml的配置文件，设置自动扫描包路径，静态资源处理，视图解析器等。
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 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/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> <!-- 关闭默认的包扫描，限定智能扫描指定的包 --> <context:component-scan base-package="com.znsd.ssm" use-default-filters="false"> <!-- 扫描@Controller注解扫描的包 --> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> <!-- 扫描@ControllerAdvice注解扫描的包 --> <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/> </context:component-scan> <!-- 视图解析器：将逻辑视图转发到对应的物理视图 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/" /> <property name="suffix" value=".html" /> </bean> <!-- 配置文件上传组件 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 指定默认的编码格式 --> <property name="defaultEncoding" value="UTF-8" /> <!-- 指定允许上传的文件大小，单位Byte--> <property name="maxUploadSize" value="512000" /> </bean> <!-- 将静态资源交由tomcat来处理 --> <mvc:default-servlet-handler /> <!-- 注册类型转换器 --> <mvc:annotation-driven /> </beans>
3.添加spring.xml配置文件，在Spring中提供Service，Dao，事务，连接池等信息。
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd"> <!-- 指定不扫描的包 --> <context:component-scan base-package="com.znsd.ssm"> <!-- 排除@Controller注解的包 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> <!-- 排除@ControllerAdvice注解的包 --> <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/> </context:component-scan> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="jdbc:mysql://localhost:3306/mybatis" /> <property name="username" value="root" /> <property name="password" value="100" /> <property name="filters" value="stat" /> <property name="maxActive" value="20" /> <property name="initialSize" value="1" /> <property name="maxWait" value="60000" /> <property name="minIdle" value="1" /> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <property name="poolPreparedStatements" value="true" /> <property name="maxOpenPreparedStatements" value="20" /> <property name="asyncInit" value="true" /> </bean> <!-- Spring扫描所有的mapper文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 设置连接池对象 --> <property name="dataSource" ref="dataSource" /> <!-- Mappper所在的包路径 --> <property name="mapperLocations" value="classpath:com/znsd/ssm/dao/mapper/*.xml" /> <!-- 指定mybatis的配置文件 --> <property name="configLocation" value="classpath:mybatis.xml"></property> </bean> <!-- Spring 扫描DAO包 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- DAO包所在的包路径 --> <property name="basePackage" value="com.znsd.ssm.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> <!-- 配置事务 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 事务的通知方式 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="find*" propagation="REQUIRED" read-only="true" /> <tx:method name="search*" propagation="REQUIRED" read-only="true" /> <tx:method name="query*" propagation="REQUIRED" read-only="true" /> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="submit*" propagation="REQUIRED" /> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="del*" propagation="REQUIRED" /> <tx:method name="remove*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="modify*" propagation="REQUIRED" /> <tx:method name="*" propagation="REQUIRED" read-only="true" /> </tx:attributes> </tx:advice> <!-- AOP切面拦截事务 --> <aop:config> <aop:pointcut id="serviceMethod" expression="execution(* com.znsd.ssm.service.*.*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceMethod" /> </aop:config> </beans>
4.在SSM中，可以省略mybatis.xml配置文件，也可以添加，只不过需要在sqlSessionFactory中配置configLocation属性即可。
<?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> <!-- 取别名，这个必须按照一定的顺序配置 --> <typeAliases> <!-- 将这个包下面的所有的类全部倒入进来，明明规则就是类名首字母小写 --> <package name="com.znsd.ssm.entities"/> </typeAliases> </configuration>
三.最后是三层架构分别是Dao,Service,Controller层。还有entities实体类。
entities实体类代码如下:
package com.znsd.ssm.entities; import java.io.Serializable; public class Student implements Serializable{ /** * */ private static final long serialVersionUID = 1L; private Integer id; private String stuName; private Integer age; private Integer sex; //省略getter,setter,toString方法 }
Dao接口层代码如下:
package com.znsd.ssm.dao; import java.util.List; import com.znsd.ssm.entities.Student; public interface StudentDao { public List<Student> selectList(); }
Dao层下创建mapper文件夹，再在该文件夹下添加映射文件代码如下:
<?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.znsd.ssm.dao.StudentDao"> <resultMap type="com.znsd.ssm.entities.Student" id="studentMap"> <id column="id" property="id" /> <result column="stuName" property="stuName" /> <result column="age" property="age" /> <result column="sex" property="sex" /> </resultMap> <!-- 查询学生列表 --> <select id="selectList" resultMap="studentMap"> select * from student </select> </mapper>
Service接口层和实现层代码如下:
package com.znsd.ssm.service; import java.util.List; import com.znsd.ssm.entities.Student; public interface StudentService { public List<Student> find(); }
package com.znsd.ssm.service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.znsd.ssm.dao.StudentDao; import com.znsd.ssm.entities.Student; import com.znsd.ssm.service.StudentService; @Service public class StudentServiceImpl implements StudentService{ @Autowired private StudentDao studentDao; @Override public List<Student> find() { return studentDao.selectList(); } }
最后是Controller层代码如下:
package com.znsd.ssm.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.znsd.ssm.entities.Student; import com.znsd.ssm.service.StudentService; @Controller public class IndexController { @Autowired private StudentService studentService; @RequestMapping("/index") public String indnx() { List<Student> list = studentService.find(); for (Student stu : list) { System.out.println(stu); } return "index"; } }
五.最后在项目下的WEB-INF文件夹下创建views文件夹，再创建index.html文件如下：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <h1>Hello word SSM!</h1> </body> </html>
再在WebContent文件夹下添加测试test.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <% response.sendRedirect("index"); %> </body> </html>
如果运行成功会跳转到index.html页面。那么一个简单的SSM框架搭好了！
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