IDEA实现 springmvc的简单登录
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
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<spring.version>4.3.18.RELEASE</spring.version>
<mysql.version>5.1.48</mysql.version>
<servlet.version>3.0-alpha-1</servlet.version>
<commons-codec.version>1.9</commons-codec.version>
<commons-dbcp.version>1.4</commons-dbcp.version>
<jetty.version>8.1.8.v20121106</jetty.version>
<slf4j.version>1.7.5</slf4j.version>
<testng.version>6.8.7</testng.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</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-context</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-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version> 1.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>3.0-alpha-1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.14.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
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
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<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">
<display-name>Archetype Created Web Application</display-name>
<display-name>Archetype Created Web Application</display-name>
<!--配置Spring的监听器,默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--设置配置文件的路径-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
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。
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
>
<!--包扫描-->
<context:component-scan base-package="dao"/>
<context:component-scan base-package="service"/>
<context:component-scan base-package="web"/>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"><value>com.mysql.jdbc.Driver</value></property>
<property name="url"><value>jdbc:mysql://localhost:3306/web1</value></property>
<property name="username"><value>root</value></property>
<property name="password"><value>123</value></property>
</bean>
<!-- 配置Jdbc模板 -->
<bean class="org.springframework.jdbc.core.JdbcTemplate"
id="jdbcTemplate" p:dataSource-ref="dataSource"/>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource"/>
</beans>
3.dispatcher-servlet.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd"
>
<context:component-scan base-package="dao"/>
<context:component-scan base-package="service"/>
<context:component-scan base-package="web"/>
<mvc:annotation-driven/>
<!--mvc视图解析-->
<bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/><!--设置JSP文件的目录位置-->
<property name="suffix" value=".jsp"/>
<property name="exposeContextBeansAsAttributes" value="true"/>
</bean>
<!--如果不写proxy-target-class="true"这句话也没问题-->
<aop:aspectj-autoproxy proxy-target-class="true"/>
</beans>
4.Jsp
1.login
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>主页</title>
</head>
<body>
${error}
<form action="<c:url value="/login"/>" method="post">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
<input type="submit" value="登录">
</form>
<a href="${pageContext.request.contextPath}/insertPage">注册</a>
</body>
</html>
2.register
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form method="post" action="${pageContext.request.contextPath}/insert">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
<input type="submit" value="注册">
</form>
</body>
</html>
3.success
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>成功</title>
</head>
<body>
${User}
</body>
</html>
4.success1
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>注册成功</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/index.html"> ${Insert}</a>
</body>
</html>
配置好Tomcat就可以运行了
很简单的登录界面