初学ssm框架的信息

     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。

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">4.0.0com.zztyssm01war0.0.1-SNAPSHOTssm01 Maven Webapphttp://maven.apache.org  4.0.2.RELEASE  3.1.1  1.7.7 1.2.17    junit junit 4.11  test    org.springframework spring-core ${spring.version}   org.springframework spring-web ${spring.version}   org.springframework spring-oxm ${spring.version}   org.springframework spring-tx ${spring.version}   org.springframework spring-jdbc ${spring.version}   org.springframework spring-webmvc ${spring.version}   org.springframework spring-aop ${spring.version}   org.springframework spring-context-support ${spring.version}   org.springframework spring-test ${spring.version}    org.mybatis mybatis ${mybatis.version}    org.mybatis mybatis-spring 1.1.0    javax javaee-api 7.0    mysql mysql-connector-java 5.1.30    commons-dbcp commons-dbcp 1.2.2    jstl jstl 1.2     log4j log4j ${log4j.version}    com.alibaba fastjson 1.1.41   org.slf4j slf4j-api ${slf4j.version}   org.slf4j slf4j-log4j12 ${slf4j.version}     org.codehaus.jackson jackson-mapper-asl 1.9.13    commons-fileupload commons-fileupload 1.3.1   commons-io commons-io 2.4   commons-codec commons-codec 1.9  ssm01

  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。

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">package="zizai.controller" />class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">text/html;charset=UTF-8<beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> class="org.springframework.web.servlet.view.InternalResourceViewResolver">class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    

6、spring mybatis.xml  他的作用就是整合Spring 和Mybatis。

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">package="zizai.*" />class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close">class="org.mybatis.spring.SqlSessionFactoryBean">class="org.mybatis.spring.mapper.MapperScannerConfigurer">class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

 

7、还有的就是webapp 下面的WEB-INF下面的web.xml 的配置了

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">Archetype Created Web ApplicationcontextConfigLocationclasspath:spring-mybatis.xmlencodingFilterclass>org.springframework.web.filter.CharacterEncodingFilterclass>trueencodingUTF-8encodingFilter/*org.springframework.web.context.ContextLoaderListenerorg.springframework.web.util.IntrospectorCleanupListenerdefault/resources/*SpringMVCorg.springframework.web.servlet.DispatcherServletcontextConfigLocationclasspath:spring-mvc.xml1trueSpringMVC//index.jsp15

 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)

id, name, pwdselectfrom suserwhere id = #{id,jdbcType=INTEGER}select from suserwhere name = #{name,jdbcType=VARCHAR}delete from suserwhere id = #{id,jdbcType=INTEGER}insert into suser (id, name, pwd)values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{pwd,jdbcType=VARCHAR})insert into suser<if test="id != null" >id,if><if test="name != null" >name,if><if test="pwd != null" >pwd,if><if test="id != null" >#{id,jdbcType=INTEGER},if><if test="name != null" >#{name,jdbcType=VARCHAR},if><if test="pwd != null" >#{pwd,jdbcType=VARCHAR},if>update suser<if test="name != null" >name = #{name,jdbcType=VARCHAR},if><if test="pwd != null" >pwd = #{pwd,jdbcType=VARCHAR},if>where id = #{id,jdbcType=INTEGER}update suserset name = #{name,jdbcType=VARCHAR},pwd = #{pwd,jdbcType=VARCHAR}where id = #{id,jdbcType=INTEGER}update suserset pwd = #{pwd,jdbcType=VARCHAR}where name = #{name,jdbcType=VARCHAR}

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"%> 
 
    
 欢迎来到自在天原的登陆页面
 
用户名:

    密码: 

  登陆注册
 

register.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>  
  
          
 &nbsp;  用户名：

    密码：