SSM整合配置——快速搭一个能连接数据库的demo

为了快速入门SSM框架,本码农总结了以下的经验。开发工具以eclipse j2ee为例。

1、新建一个JavaWeb工程,选择以下工程类型

2、创建工程的步骤流程

(1)给项目命名,点击next

(2)给项目新添一个资源文件名叫config,点击next

(3)图中的web.xml记得勾上,点击finish

3、项目创建好了,如果你没有配置服务器,先配置一下,本文以tomcat为例;如果配置好的就不需要这一步了。

(1)点击如下红框的内容,跳出来配置服务器

(2)选择appache的tomcat,请选择tomcat版本,要和本地的一致,点击next

              

(3)将项目部署到tomcat上,双击你想要添加的项目。最后点击finish

               

4、接下来就是整合ssm框架了。

(1)首先导入ssm需要的jar包,放入如下文件夹。(只需复制粘贴进去,大概33个必须的jar包)

(2)配置web.xml(这个不做详细解释,复制代码就能用了)

<?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_2_5.xsd" version="2.5">
  <display-name>SSM_demo</display-name>
  <context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring/applicationContext-*.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
  <servlet>
  	<servlet-name>SSM_demo</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:spring/springmvc.xml</param-value>
  	</init-param>
  
  </servlet>
  <servlet-mapping>
  	<servlet-name>SSM_demo</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <welcome-file-list>
    <welcome-file></welcome-file>
  </welcome-file-list>
</web-app>

(3)根据mvc理念建立一下的包结构:

web层:com.test.controller;

service层:com.test.service和com.test.service.impl;

dao层:com.test.mapper

另外还有一个实体类包:com.test.pojo

(4)接下来是config文件中配置

A.首先将db.properties和log4j.properties放入config根目录下(以mysql数据库为例)

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm_demo
jdbc.username=user
jdbc.password=123

log4j.properties

# Global logging configuration
#\u5728\u5f00\u53d1\u73af\u5883\u4e0b\u65e5\u5fd7\u7ea7\u522b\u8981\u8bbe\u7f6e\u6210DEBUG\uff0c\u751f\u4ea7\u73af\u5883\u8bbe\u7f6e\u6210info\u6216error
log4j.rootLogger=debug, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

B.在config下建立两个包:spring和mybatis

C.先配置mybatis,在mybatis包下放入一个叫SqlMapConfig.xml的配置文件

<?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>
	<typeAliases>
		<package name="com.test.pojo"/>
	</typeAliases>
</configuration>

注意:中间的com.test.pojo对应的是你项目中的com.test.pojo包,不能出错!

D.spring配置管理dao层,在spring包下面创建application-dao.xml

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-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/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

	<context:property-placeholder location="classpath:db.properties" />
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<property name="maxActive" value="30" />
		<property name="maxIdle" value="5" />
	</bean>
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
	</bean>
	<!-- mapper扫描器 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.test.mapper"></property>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
	</bean>
</beans>

注意:configLocation的value值不能写错,必须和你的mybatis包下的SqlMapConfig对应,同样com.test.maper同样也要对应。

E.spring配置管理service层,在spring包下放入application-service.xml配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-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/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">


<context:component-scan base-package="com.test.service" />
</beans>

注意:com.test.service要和工程中的包对应

F.spring配置事务层,在spring包下放入application-transation.xml

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-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/aop 
		http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	<property name="dataSource" ref="dataSource"/>
</bean>

<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
	<tx:attributes>
		<!-- 传播行为 -->
		<tx:method name="save*" propagation="REQUIRED"/>
		<tx:method name="del*" propagation="REQUIRED"/>
		<tx:method name="insert*" propagation="REQUIRED"/>
		<tx:method name="update*" propagation="REQUIRED"/>
		<tx:method name="add*" propagation="REQUIRED"/>
		<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
		<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
		<tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
	</tx:attributes>
</tx:advice>
<aop:config>
	<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.test.service.impl.*.*(..))"/>
</aop:config>
</beans>

最后第三行的代码是正则表达式匹配的是com.test.service.impl包下面的所有类的所有方法,同样要匹配

G.配置springmvc,在spring下面放入springmvc.xml配置文件

<?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: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/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
	<context:component-scan base-package="com.test.controller"></context:component-scan>
	<!-- 配置SpringMVC -->
	<!-- 1.开启SpringMVC注解模式 -->
	<!-- 简化配置: (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter 
		(2)提供一些列:数据绑定,数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 -->
	<mvc:annotation-driven />

	<!-- 2.静态资源默认servlet配置 (1)加入对静态资源的处理:js,gif,png (2)允许使用"/"做整体映射 -->
	<mvc:resources mapping="/resources/**" location="/resources/" />
	<mvc:default-servlet-handler />
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/"/>
		<property name="suffix" value=".jsp"/>
	</bean>
	
</beans>

注意:同样的,第十一行com.test.controller也要对应包名

5、配置差不多OK了,接下来终于可以写demo了。

(1)pojo包、mapper包

如果数据库创好了,mybatis提供了一个人性化的技术——逆向工程(具体怎么使用不细讲了)。使用逆向工程后自动生成数据库中对应的实体类,以及最基础的sql语句(即XXXMapper.xml)

(2)service包、service.impl(包)

service包下面直接写接口,service.impl下写对应的实现类

(3)controller包

(4)在WebContent下新建一个index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	id:${user.userid},name:${user.username}
</body>
</html>

(5)启动tomcat,在浏览器中输入localhost:8080/SSM_demo/user,跳出如下的页面。

6、以上就是快速搭建一个SSM框架的demo案例,搭建SSM框架其实不难,主要是细节不要忘记。

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转载自blog.csdn.net/MaxwellQAQ/article/details/81231243
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