eclipse开发java的web项目时使用SSM框架的方法

xiaoxiao2021-02-28 81

本次采用的spring MVC Jar包如下：

spring-aop-4.1.3.RELEASE.jar spring-beans-4.1.3.RELEASE.jar spring-context-4.1.3.RELEASE.jar spring-context-support-4.1.3.RELEASE.jar spring-core-4.1.3.RELEASE.jar spring-expression-4.1.3.RELEASE.jar spring-jdbc-4.1.3.RELEASE.jar spring-oxm-4.1.3.RELEASE.jar spring-tx-4.1.3.RELEASE.jar spring-web-4.1.3.RELEASE.jar spring-webmvc-4.1.3.RELEASE.jar

1.首先创建Web项目 web.mvc 2.引入所有的jar文件 3.配置web.xml 做web开发的都知道,web.xml是项目的入口，我们既然使用spring那么当然要添加Spring的支持啦！ spring默认加载的是applicationContext.xml，由于我们需要集成MyBatis 所以我把Spring的配置文件强制指定名称，并与MyBatis一起配置，减少配置文件数量先指定spring配置文件名名称与路径

[html] view plain copy  <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:xmlconfig/springmvc-mybatis.xml</param-value> </context-param> 再执行Spring上下文监听配置 [html] view plain copy <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> 添加支持Spring mvc 的配置说明：添加支持目前有3种方式。第一种：拦截 /*.do

第二种：拦截 /*

第三种，也是我推荐的一种：拦截 /

[html] view plain copy  <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/xmlconfig/springmvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> 优点：支持rest风格，URL美观，不拦截静态资源我们采用第三种做为我们的拦截方案，将配置添加到web.xml中。大家都知道，web项目最怕的就是乱码，而spring为我们提供了字符编码的过滤器，我们也给配置到web.xml中 [html] view plain copy  <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> [html] view plain copy  <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 我们采用的是tomcat服务器，为了让静态的资源直接交给tomcat处理，所以我们在web.xml中配置了以下配置

[html] view plain copy  <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.gif</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> [html] view plain copy  <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.gif</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping> 4.配置springmvc-mybatis.xml和springmvc-servlet.xml 相信很多人都在这里卡主了，因为配置实在是太多了，各种方式都有为了不妨碍大家，我决定直接将完整的配置直接贴出来 springmvc-mybatis.xml [html] view plain copy <?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">  <bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource"> <property name="driverClass" value="jdbc:mysql://127.0.0.1:3306/web" /> <property name="jdbcUrl" value="root" /> <property name="username" value="123456" /> <property name="password" value="com.mysql.jdbc.Driver" /> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="mapperLocations" value="classpath*:dbmap/*Mapper.xml" /> </bean>  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource"> <ref bean="dataSource" /> </property> </bean> <bean id="defaultLobHandler" class="org.springframework.jdbc.support.lob.DefaultLobHandler" lazy-init="true"/>  <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ansitech.web.orm.mapper" /> </bean> </beans> spring-servlet.xml [html] view plain copy <?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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"> <description>Spring MVC Configuration</description>  <mvc:default-servlet-handler/>  <context:annotation-config />  <mvc:annotation-driven />  <context:component-scan base-package="com.ansitech.web"></context:component-scan>  <bean class= "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/view/"/> <property name="suffix" value=".jsp"/> <property name="viewNames" value="jsp/*"/> <property name="order" value="1"/> </bean> <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="prefix" value="/WEB-INF/view/"/> <property name="suffix" value=".jsp"/> <property name="order" value="2"/> </bean>  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  <property name="maxUploadSize"> <value>5242880</value> </property> </bean> </beans> web.xml [html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">  <session-config>  <session-timeout>30</session-timeout> </session-config>  <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.gif</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.css</url-pattern> </servlet-mapping>  <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:xmlconfig/springmvc-mybatis.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/xmlconfig/springmvc-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <welcome-file-list> <welcome-file>/index.html</welcome-file> </welcome-file-list> </web-app> 接下来就是包的结构了前缀大家可以自己定义自己喜欢的，但是后边的结构，是整个框架的核心，所以请大家按照我的格式去建前缀com.ansitech com.ansitech.orm com.ansitech.orm.base com.ansitech.orm.mapper com.ansitech.service com.ansitech.service.po com.ansitech.service.impl com.ansitech.web com.ansitech.web.controller 大家可能不理解，为什么要这么建呢？那么我们来以用户管理模块来解释，用户对象为User 那么我们需要建立基础对象： com.ansitech.orm.base.User.Java [html] view plain copy package com.ansitech.orm.base; /** * 用户对象 * * @author qsyang */ public class User { private int id; private String loginName; private String loginPwd; /** * 用户类型 1 管理员 2 普通用户 */ private int typeId; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getLoginName() { return loginName; } public void setLoginName(String loginName) { this.loginName = loginName; } public String getLoginPwd() { return loginPwd; } public void setLoginPwd(String loginPwd) { this.loginPwd = loginPwd; } public int getTypeId() { return typeId; } public void setTypeId(int typeId) { this.typeId = typeId; } } 基础对象建好了，我们需要做一个Mapper来实现用户对象的增删改查

com.ansitech.orm.mapper.UserMapper.Java

[html] view plain copy package com.ansitech.orm.mapper; import com.ansitech.orm.base.User; import org.apache.ibatis.annotations.Param; /** * 用户数据接口 * * @author qsyang */ public interface UserMapper { void add(User user); User get(@Param("id") int id); void update(User user); int delete(@Param("id") int id); }

使用ORM模式，我们需要创建一个抽象的用户对象来解决额外属性查询的问题

com.ansitech.orm.AbstractUser.java

[html] view plain copy package com.ansitech.orm; import com.ansitech.orm.base.User; /** * 抽象用户对象 * * 提供其他属性获取 * * @author qsyang */ public abstract class AbstractUser extends User{ //获取当前用户所属分类名称 public abstract String findTypeName(); }

有了数据接口了，我们需要对外提供服务

com.ansitech.service.IUserService.java

[html] view plain copy package com.ansitech.service; import com.ansitech.orm.AbstractUser; import com.ansitech.orm.base.User; /** * 用户服务接口 * * @author qsyang */ public interface IUserService { //添加系统管理员 void addSystemUser(String loginName, String loginPwd); //添加普通用户 void addNormalUser(String loginName, String loginPwd); //根据用户Id查询抽象用户 AbstractUser getAbstractUserById(int userId); //根据用户Id查询用户 User getUserById(int userId); //修改用户信息 void updateUser(int userId, String loginName, String loginPwd); //根据用户Id删除用户 int deleteUser(int userId); }

有了服务接口，就要有实现接口

com.ansitech.service.impl.UserService.java

[html] view plain copy package com.ansitech.service.impl; import com.ansitech.orm.AbstractUser; import com.ansitech.orm.base.User; import com.ansitech.orm.mapper.UserMapper; import com.ansitech.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; /** * 用户接口实现类 * * @author qsyang */ @Service public class UserService implements IUserService { @Autowired private UserMapper userMapper; @Override public void addSystemUser(String loginName, String loginPwd) { User user = new User(); user.setLoginName(loginName); user.setLoginPwd(loginPwd); //用户类型 1 管理员 2 普通用户 user.setTypeId(1); userMapper.add(null); } @Override public void addNormalUser(String loginName, String loginPwd) { User user = new User(); user.setLoginName(loginName); user.setLoginPwd(loginPwd); //用户类型 1 管理员 2 普通用户 user.setTypeId(2); userMapper.add(null); } @Override public AbstractUser getAbstractUserById(int userId) { throw new UnsupportedOperationException("Not supported yet."); } @Override public User getUserById(int userId) { return userMapper.get(userId); } @Override public void updateUser(int userId, String loginName, String loginPwd) { //先根据用户Id查询用户对象 User user = userMapper.get(userId); if (user != null) { user.setLoginName(loginName); user.setLoginPwd(loginPwd); //修改用户 userMapper.update(user); } } @Override public int deleteUser(int userId) { return userMapper.delete(userId); } }细心的便宜，可能已经看到了，getAbstractUserById()这个方法我们还没有实现 因为AbstractUser还有具体的实现类，所以我们来新建实现类 [html] view plain copy <pre name="code" class="html">package com.ansitech.service.po; import com.ansitech.orm.AbstractUser; import com.ansitech.orm.base.User; import com.ansitech.service.impl.UserService; /** * 用户数据操作对象 * * @author qsyang */ public class UserPO extends AbstractUser { private final UserService userService; public UserPO(UserService userService) { this.userService = userService; } public UserPO copyFrom(User obj) { this.setId(obj.getId()); this.setLoginName(obj.getLoginName()); this.setLoginPwd(obj.getLoginPwd()); this.setTypeId(obj.getTypeId()); return this; } @Override public String findTypeName() { return userService.findTypeName(this.getTypeId()); } } 对象已经创建好了，这个时候我们可以修改下service实现类的方法了，并且我们增加了一个方法增加这个方法，只是因为我们有可能需要继续调用其他的Mapper去查询。修改的实现方法 [html] view plain copy @Override public AbstractUser getAbstractUserById(int userId) { User user = userMapper.get(userId); if (user != null) { UserPO po = new UserPO(this); po.copyFrom(user); return po; } return null; } 新增的方法：

[html] view plain copy public String findTypeName(int typeId) { if (typeId == 1) { return "系统管理员"; } else { return "普通用户"; } } 只有一来，Service架构和orm架构就已经完成了，下面只需要建立控制器就可以了

[html] view plain copy package com.ansitech.web.controller.user; import com.ansitech.orm.base.User; import com.ansitech.service.impl.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; /** * 用户控制器 * * @author qsyang */ @Controller public class UserController { @Autowired private UserService userService; @RequestMapping("/user/user-index") public String index() { User user = userService.getUserById(1); if (user != null) { System.out.println("user name = " + user.getLoginName()); } return "jsp/user/index"; } } 到此为止，这个架构就已经搭建起来了。

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