ssm框架，就是Spring ,SpringMVC ,mybstis 的简称，我们是从mybstis 开始学起的，mybatis的作用作为一个连接数据库的框架，可以很好配置连接好数据库， 有mybatis,我们对数据库增删改查的操作更为简便了。SSM框架，我们用MAVEN工具对他们进行管理，maven 工具的主要作用就是为我们的工程自动配置好我们所需的架包，是通过POM.xml 文件进行依赖管理的。
ssm02这个工程使用maven工具进行管理和配置的，他的主要作用是实现用户的登陆和注册！以及对学生信息的管理，当然其中包括了增删改查的四个基本的操作，详细的具体的过程直接看后面的代码！
1 首先是POM.xml 文件的配置，他的作用主要是添加依懒的关系和自动下载相关的包。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.zzty</groupId><artifactId>ssm01</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>ssm01 Maven Webapp</name><url>http://maven.apache.org</url><properties> <!-- spring版本号 --> <spring.version>4.0.2.RELEASE</spring.version> <!-- mybatis版本号 --> <mybatis.version>3.1.1</mybatis.version> <!-- log4j日志文件管理包版本 --> <slf4j.version>1.7.7</slf4j.version> <log4j.version>1.2.17</log4j.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示开发的时候引入，发布的时候不会加载此包 --> <scope>test</scope> </dependency> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.1.0</version> </dependency> <!-- 导入java ee jar 包 --> <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> <version>7.0</version> </dependency> <!-- 导入Mysql数据库链接jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency> <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> </dependency> <!-- JSTL标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- 日志文件管理包 --> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <!-- 格式化对象，方便输出日志 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.1.41</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- log end --> <!-- 映入JSON --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <!-- 上传组件包 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.9</version> </dependency> </dependencies><build><finalName>ssm01</finalName></build> </project>
2 、配置resource下面的四个文件。
3、首先对resource下的jdbc.properties进行配置 ,作用就是连接你的数据库的配置
driver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/ssm01 username=root password=root #定义初始连接数 initialSize=0 #定义最大连接数 maxActive=20 #定义最大空闲 maxIdle=20 #定义最小空闲 minIdle=1 #定义最长等待时间 maxWait=60000
4、接着是log4.properties的配置，它的作用是用来记录运行时产生的信息。
#定义LOG输出级别 log4j.rootLogger=INFO,Console,File #定义日志输出目的地为控制台 log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.Target=System.out #可以灵活地指定日志输出格式，下面一行是指定具体的格式 log4j.appender.Console.layout = org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n#文件大小到达指定尺寸的时候产生一个新的文件 log4j.appender.File = org.apache.log4j.RollingFileAppender #指定输出目录 log4j.appender.File.File = logs/ssm.log #定义文件最大大小 log4j.appender.File.MaxFileSize = 10MB # 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志 log4j.appender.File.Threshold = ALL log4j.appender.File.layout = org.apache.log4j.PatternLayout log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
5、接着是spring mvc .xml的配置。
<?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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 --><context:component-scan base-package="zizai.controller" /><!--避免IE执行AJAX时，返回JSON出现下载文件 --><bean id="mappingJacksonHttpMessageConverter"class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/html;charset=UTF-8</value></list></property></bean><!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 --><beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"><property name="messageConverters"><list><ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 --></list></property></bean><!-- 定义跳转的文件的前后缀 ，视图模式配置-这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/jsp/" /><property name="suffix" value=".jsp" /></bean><!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --><property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --><property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --><property name="maxInMemorySize" value="40960" /> </bean></beans>
6、spring mybatis.xml 他的作用就是整合Spring 和Mybatis。
<?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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"><!-- 自动扫描 --><context:component-scan base-package="zizai.*" /><!-- 引入配置文件 --><bean id="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="location" value="classpath:jdbc.properties" /></bean><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close"><property name="driverClassName" value="${driver}" /><property name="url" value="${url}" /><property name="username" value="${username}" /><property name="password" value="${password}" /><!-- 初始化连接大小 --><property name="initialSize" value="${initialSize}"></property><!-- 连接池最大数量 --><property name="maxActive" value="${maxActive}"></property><!-- 连接池最大空闲 --><property name="maxIdle" value="${maxIdle}"></property><!-- 连接池最小空闲 --><property name="minIdle" value="${minIdle}"></property><!-- 获取连接最大等待时间 --><property name="maxWait" value="${maxWait}"></property></bean><!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><!-- 自动扫描mapping.xml文件 --><property name="mapperLocations" value="classpath:zizai/mapping/*.xml"></property></bean><!-- DAO接口所在包名，Spring会自动查找其下的类 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="zizai.dao" /><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property></bean><!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean></beans>
7、还有的就是webapp 下面的WEB-INF下面的web.xml 的配置了
<?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"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"version="3.0"><display-name>Archetype Created Web Application</display-name><!-- Spring和mybatis的配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mybatis.xml</param-value></context-param><!-- 编码过滤器 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><async-supported>true</async-supported><init-param><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监听器 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 防止Spring内存溢出监听器 --><listener><listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class></listener><servlet-mapping><servlet-name>default</servlet-name><url-pattern>/resources/*</url-pattern></servlet-mapping><!-- Spring MVC servlet --><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:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup><async-supported>true</async-supported></servlet><servlet-mapping><servlet-name>SpringMVC</servlet-name><!-- 此处可以可以配置成*.do，对应struts的后缀习惯 --><url-pattern>/</url-pattern></servlet-mapping><welcome-file-list><welcome-file>/index.jsp</welcome-file></welcome-file-list><!-- 配置SESSION超时，单位是分钟 --><session-config><session-timeout>15</session-timeout></session-config></web-app>
8、我们现在要写的就是Controller层，Service接口层，ServiceImp接口的实现层！就一个列子为例来说明的吧！这个UserController层，主要是实现用户的登陆和注册以及修改用户的密码。
package zizai.controller;import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView;import zizai.model.User; import zizai.service.StudentService; import zizai.service.UserService;@Controller @RequestMapping("/user") public class UserController {@Resourceprivate UserService userService;@Resourceprivate StudentService studentService;@RequestMapping("/showUser") public String showUser(HttpServletRequest request,Model model){ int userId = Integer.parseInt(request.getParameter("id")); User user = this.userService.getUserById(userId); model.addAttribute("user", user); return "showUser"; } @RequestMapping("/table") public ModelAndView showTable(HttpServletRequest request){ ModelAndView view = new ModelAndView("tables");return view; } @RequestMapping("/index") public ModelAndView toIndex(HttpServletRequest request){ ModelAndView view = new ModelAndView("login");return view; } @RequestMapping("/login2") public ModelAndView login(HttpServletRequest request,Model model){String username = request.getParameter("name");String pwd = request.getParameter("pwd");User user = this.userService.getUserByName(username);String url="login";if(user!=null&&pwd.equals(user.getPwd())){url="sucess";}else{url="fail";}ModelAndView view = new ModelAndView(url);return view;} @RequestMapping("/register") public ModelAndView register(HttpServletRequest request,Model model){ String username = request.getParameter("name");String pwd = request.getParameter("pwd");User user = new User(); user.setName(username);user.setPwd(pwd);int i=this.userService.addUser(user);String url="register";if(username!=null||pwd!=null){ if(i>0){url="login";}else{url="fail";} }ModelAndView view = new ModelAndView(url);return view;} @RequestMapping("/updateUserPwd") public String updateUserPwd(HttpServletRequest request,Model model){String name=request.getParameter("name");String pwd=request.getParameter("pwd");String pwd1=request.getParameter("pwd1");if(pwd1.equals(pwd)&&pwd1!=null){ User user=new User();user.setPwd(pwd);user.setName(name);int i=this.userService.updateUserPwdByName(user); return "success";}else{return "fail2";}}@RequestMapping("/getUserByName") public ModelAndView selectByName(HttpServletRequest request,Model model){String name = request.getParameter("name");User user=new User();user=this.userService.getUserByName(name);String url="getUserByName";if(name!=null){url="updateUserPwd";} ModelAndView view = new ModelAndView();view.setViewName(url);view.addObject("xxx", user);return view;}}
useService 接口层
package zizai.service;import zizai.model.User;public interface UserService {public User getUserById(int id);public User getUserByName(String name);public int addUser(User user);public int updateUserPwdByName(User user);}
UserServiceImp 实现层
package zizai.serviceImp;import javax.annotation.Resource;import org.springframework.stereotype.Service;import zizai.dao.UserMapper; import zizai.model.User; import zizai.service.UserService;@Service("userService") public class UserServiceImp implements UserService {@Resourceprivate UserMapper userMapper;public User getUserById(int id) {// TODO Auto-generated method stubreturn userMapper.selectByPrimaryKey(id);}public int addUser(User user) {// TODO Auto-generated method stubreturn userMapper.insert(user);}public User getUserByName(String name) {// TODO Auto-generated method stubreturn userMapper.selectByName(name);}public int updateUserPwdByName(User user) {// TODO Auto-generated method stubreturn userMapper.updateUserPwdByName(user);}}
model(USer model)层
package zizai.model;public class User {private Integer id;private String name;private String pwd;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name == null ? null : name.trim();}public String getPwd() {return pwd;}public void setPwd(String pwd) {this.pwd = pwd == null ? null : pwd.trim();} }
mapping (USer mapping)
<?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="zizai.dao.UserMapper" ><resultMap id="BaseResultMap" type="zizai.model.User" ><id column="id" property="id" jdbcType="INTEGER" /><result column="name" property="name" jdbcType="VARCHAR" /><result column="pwd" property="pwd" jdbcType="VARCHAR" /></resultMap><sql id="Base_Column_List" >id, name, pwd</sql><select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >select<include refid="Base_Column_List" />from suserwhere id = #{id,jdbcType=INTEGER}</select><select id="selectByName" resultMap="BaseResultMap" parameterType="java.lang.String" >select <include refid="Base_Column_List" />from suserwhere name = #{name,jdbcType=VARCHAR}</select><delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >delete from suserwhere id = #{id,jdbcType=INTEGER}</delete><insert id="insert" parameterType="zizai.model.User" >insert into suser (id, name, pwd)values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{pwd,jdbcType=VARCHAR})</insert><insert id="insertSelective" parameterType="zizai.model.User" >insert into suser<trim prefix="(" suffix=")" suffixOverrides="," ><if test="id != null" >id,</if><if test="name != null" >name,</if><if test="pwd != null" >pwd,</if></trim><trim prefix="values (" suffix=")" suffixOverrides="," ><if test="id != null" >#{id,jdbcType=INTEGER},</if><if test="name != null" >#{name,jdbcType=VARCHAR},</if><if test="pwd != null" >#{pwd,jdbcType=VARCHAR},</if></trim></insert><update id="updateByPrimaryKeySelective" parameterType="zizai.model.User" >update suser<set ><if test="name != null" >name = #{name,jdbcType=VARCHAR},</if><if test="pwd != null" >pwd = #{pwd,jdbcType=VARCHAR},</if></set>where id = #{id,jdbcType=INTEGER}</update><update id="updateByPrimaryKey" parameterType="zizai.model.User" >update suserset name = #{name,jdbcType=VARCHAR},pwd = #{pwd,jdbcType=VARCHAR}where id = #{id,jdbcType=INTEGER}</update><update id="updateUserPwdByName" parameterType="zizai.model.User">update suserset pwd = #{pwd,jdbcType=VARCHAR}where name = #{name,jdbcType=VARCHAR}</update> </mapper>
dao (user Dao)
package zizai.dao;import zizai.model.User;public interface UserMapper {int deleteByPrimaryKey(Integer id);int insert(User record);int insertSelective(User record);User selectByName(String name);User selectByPrimaryKey(Integer id);int updateByPrimaryKeySelective(User record);int updateByPrimaryKey(User record);int updateUserPwdByName(User user);}
最后就是剩下WEB-INF 目录下的jsp文件夹下面的jsp 文件了。
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>登录</title> </head> <h3> 欢迎来到自在天原的登陆页面</h3><body style="text-align:center"> <div ><form action="/ssm02/user/login2">用户名:<input type="text" name="name"><br><br>    密码: <input type="password" name="pwd"><br><br> <button type="submit">登陆</button><a href="/ssm02/user/register"><button>注册</button></div></body> </html>
register.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>注册</title> </head> <body> <div ><form action="/ssm02/user/register"> 用户名：<input name = "name"><br> 密码：<input name = "pwd" type = "password"><br> <input type = "submit" value = "注册"></form> </div> </body> </html>
