JavaWeb开发SSM框架搭建详解

1.需要用到的jar包：由于很多的jar包不好下载，我直接上传到百度网盘：

很多，而且不好下载，我已经整理好好了：

链接：https://pan.baidu.com/s/1iIFprmstp86uKz8OgHDMWg 密码：oewl

关于SSM框架：以前的博客有介绍过

Spring框架：https://www.cnblogs.com/xuyiqing/category/1164340.html

SpringMVC框架：https://www.cnblogs.com/xuyiqing/category/1269718.html

MyBatis框架：https://www.cnblogs.com/xuyiqing/category/1181308.html

第一步：创建Dynamic Web Project

首先是整合之后的目录结构：

需要我们关注的只是我红线画出的：

先把所有的jar包复制入lib文件夹：不同于传统java项目，这里会自动build path，总之复制进去就完事了

关于mybatis和spring的配置文件，分别在两个文件夹中：

首先来配置mybatis：SqlMapConfig.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>

    <!-- 别名 -->
    <typeAliases>
        <package name="org.dreamtech.ssm.pojo"/>
    </typeAliases>

</configuration>

配置Spring:

Dao层：applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- 配置 读取properties文件 jdbc.properties -->
    <context:property-placeholder location="classpath:jdbc.properties" />

    <!-- 配置 数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>
    
    <!-- 配置SqlSessionFactory -->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 设置MyBatis核心配置文件 -->
        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
        <!-- 设置数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>
    
    <!-- 配置Mapper扫描 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 设置Mapper扫描包 -->
        <property name="basePackage" value="org.dreamtech.ssm.mapper" />
    </bean>
    
</beans>

Service层：applicationContext-service.xml:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <!-- 配置Service扫描 -->
    <context:component-scan base-package="org.dreamtech.ssm.service" />
</beans>

配置SpringMVC：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:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    <!-- 配置Controller扫描 -->
    <context:component-scan base-package="org.dreamtech.ssm.controller" />
    
        <context:property-placeholder location="classpath:resource.properties" />
    
    <!-- 配置注解驱动 -->
    <mvc:annotation-driven />
    
    <!-- 对静态资源放行  -->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/>
    <mvc:resources location="/fonts/" mapping="/fonts/**"/>
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

接下来就算最关键的一步：web.xml配置

<?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_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>SSM</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>

    <!-- 配置spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext-*.xml</param-value>
    </context-param>

    <!-- 配置监听器加载spring -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>


    <!-- 配置过滤器，解决post的乱码问题 -->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- 配置SpringMVC -->
    <servlet>
        <servlet-name>ssm</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>
        <!-- 配置springmvc什么时候启动，参数必须为整数 -->
        <!-- 如果为0或者大于0，则springMVC随着TOMCAT容器启动而启动 -->
        <!-- 如果小于0，则在第一次请求进来的时候启动 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>ssm</servlet-name>
        <!-- 所有的请求都进入springMVC -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

其余的杂项配置：

1.数据库配置：用户名，数据库名，连接配置等等

jdbc.properties:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root

2.日志文件配置：

log4j.properties:

# Global logging configuration
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

3.至于resource.properties是后边项目需要的，和SSM框架无关

最后：Get方式乱码修改方式：

打开Tomcat的配置文件修改一个URIEncoding属性

    <!-- A "Connector" represents an endpoint by which requests are received
         and responses are returned. Documentation at :
         Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
         Java AJP  Connector: /docs/config/ajp.html
         APR (HTTP/AJP) Connector: /docs/apr.html
         Define a non-SSL HTTP/1.1 Connector on port 8080
    -->
    <Connector URIEncoding="UTF-8" connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>
    <!-- A "Connector" using the shared thread pool-->
    <!--
    <Connector executor="tomcatThreadPool"
               port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />
    -->