IDEA实现 springmvc的简单注册登录功能的示例代码

IDEA实现 springmvc的简单注册登录功能的示例代码

1.基本环境搭建

spring简介

SpringMVC框架是以请求为驱动，围绕Servlet设计，将请求发给控制器，然后通过模型对象，分派器来展示请求结果视图。其中核心类是DispatcherServlet，它是一个Servlet，顶层是实现的Servlet接口。

project创建

在图中填上项目名称即可，其他直接next

如上图所示，创建两个包，并且指定包的类型，如下图，java包指定为Sources Root,resouces包指定为Resources root

整个目录结构：

pom依赖

UTF-8

1.7

1.7

4.3.18.RELEASE

5.1.48

3.0-alpha-1

1.9

1.4

8.1.8.v20121106

1.7.5

6.8.7

org.springframework

spring-core

4.3.18.RELEASE

org.springframework

spring-beans

${spring.version}

org.springframework

spring-jdbc

${spring.version}

org.springframework

spring-context

${spring.version}

org.springframework

spring-webmvc

${spring.version}

org.springframework

spring-context-support

${spring.version}

org.springframework

spring-tx

${spring.version}

mysql

mysql-connector-java

${mysql.version}

commons-dbcp

commons-dbcp

1.4

javax.servlet

servlet-api

3.0-alpha-1

provided

javax.servlet.jsp

jsp-api

2.2

org.aspectj

aspectjweaver

1.9.4

org.springframework

spring-web

${spring.version}

jstl

jstl

1.2

org.testng

testng

6.14.3

test

org.springframework

spring-test

${spring.version}

test

2.

1.domain 实体类

package domain;

public class User {

private String username;

private String password;

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

}

2.dao层（实现了查询和插入）

package dao;

import domain.User;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.stereotype.Repository;

@Repository

public class UserDao{

private JdbcTemplate jdbcTemplate;

private final static String sql=" Select count(*) from user_name where username=? and password=? ";

private final static String sqlInsert="insert into user_name(username,password) values (?,?)";

@Autowired

public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {

this.jdbcTemplate = jdbcTemplate;

}

public int FindUser(String username,String password)

{

return jdbcTemplate.queryForObject(sql,new Object[]{username,password},Integer.class);

}

//

public void InsertUser(String username,String password){

jdbcTemplate.update(sqlInsert, username,password);

}

}

3.service层

package service;

import dao.UserDao;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

@Service

public class UserService {

private UserDao userdao;

@Autowired

public void setUserDao(UserDao userdao) {

this.userdao = userdao;

}

public boolean Match(String username,String password)

{

int count=userdao.FindUser(username,password);

return count>0;

}

public void InsertUser(String username,String password){

userdao.InsertUser(username,password);

}

}

4.controller层（这里用的包名为web）

package web;

import domain.User;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

import service.UserService;

import javax.servlet.http.HttpServletRequest;

@Controller

public class UserController {

private UserService userService;

@Autowired

public void setUserService(UserService userService)

this.userService = userService;

}

@RequestMapping(value = "/index.html")

public String tologin()

{

return "login";

}

@RequestMapping(value = "/login")

public ModelAndView login(HttpServletRequest request, User user){

boolean isValidUser=userService.Match(user.getUsername(),user.getPassword());

if (isValidUser){

request.getSession().setAttribute("User",user.getUsername()+":登录成功");

return new ModelAndView("success");

}else{

return new ModelAndView("login");

}

}

@RequestMapping("/insert")

public String InsertUser(User user, Model model){

userService.InsertUser(user.getUsername(),user.getPassword());

model.addAttribute("Insert","注册成功");

return "success1";

}

@RequestMapping("/insertPage")

public String InsertPage()

{

return "register";

}

}

3.xml配置

1.web.xml

"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

"http://java.sun.com/dtd/web-app_2_3.dtd" >

xmlns:xsi="http://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">

Archetype Created Web Application

Archetype Created Web Application

org.springframework.web.context.ContextLoaderListener

contextConfigLocation

classpath:applicationContext.xml

dispatcherServlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:dispatcher-servlet.xml

1

dispatcherServlet

/

xmlns:xsi="http://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">

Archetype Created Web Application

Archetype Created Web Application

org.springframework.web.context.ContextLoaderListener

contextConfigLocation

classpath:applicationContext.xml

dispatcherServlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:dispatcher-servlet.xml

1

dispatcherServlet

/

resource里面新建两个spring xml文件

2.applicationContext.xml

spring的配置文件applicationContext.xml中的一些配置的作用。

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:tx="http://springframework.org/schema/tx"

xmlns:aop="http://springframework.org/schema/aop"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd

http://springframework.org/schema/tx

http://springframework.org/schema/tx/spring-tx.xsd

http://springframework.org/schema/aop

http://springframework.org/schema/aop/spring-aop.xsd"

xmlns:context="http://springframework.org/schema/context"

xmlns:p="http://springframework.org/schema/p"

>

com.mysql.jdbc.Driver

jdbc:mysql://localhost:3306/web1

root

123

id="jdbcTemplate" p:dataSource-ref="dataSource"/>

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource"/>

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:tx="http://springframework.org/schema/tx"

xmlns:aop="http://springframework.org/schema/aop"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd

http://springframework.org/schema/tx

http://springframework.org/schema/tx/spring-tx.xsd

http://springframework.org/schema/aop

http://springframework.org/schema/aop/spring-aop.xsd"

xmlns:context="http://springframework.org/schema/context"

xmlns:p="http://springframework.org/schema/p"

>

com.mysql.jdbc.Driver

jdbc:mysql://localhost:3306/web1

root

123

id="jdbcTemplate" p:dataSource-ref="dataSource"/>

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource"/>

id="jdbcTemplate" p:dataSource-ref="dataSource"/>

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource"/>

class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

p:dataSource-ref="dataSource"/>

3.dispatcher-servlet.xml

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xmlns:mvc="http://springframework.org/schema/mvc" xmlns:p="http://springframework.org/schema/p"

xmlns:aop="http://springframework.org/schema/aop" xmlns:tx="http://springframework.org/schema/cache"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc.xsd http://springframework.org/schema/aop http://springframework.org/schema/aop/spring-aop.xsd http://springframework.org/schema/cache http://springframework.org/schema/cache/spring-cache.xsd"

>

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xmlns:context="http://springframework.org/schema/context"

xmlns:mvc="http://springframework.org/schema/mvc" xmlns:p="http://springframework.org/schema/p"

xmlns:aop="http://springframework.org/schema/aop" xmlns:tx="http://springframework.org/schema/cache"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans.xsd

http://springframework.org/schema/context

http://springframework.org/schema/context/spring-context.xsd

http://springframework.org/schema/mvc

http://springframework.org/schema/mvc/spring-mvc.xsd http://springframework.org/schema/aop http://springframework.org/schema/aop/spring-aop.xsd http://springframework.org/schema/cache http://springframework.org/schema/cache/spring-cache.xsd"

>

4.Jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

${error}

用户名:

密码:

注册

2.register

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

用户名:

密码:

3.success

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

${User}

4.success1

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

${Insert}

配置好Tomcat就可以运行了

很简单的登录界面

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