项目目录结构

引入pom文件

<?xml version="1.0" encoding="UTF-8"?>

<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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>dly-01</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>dly-01 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <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>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.6</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.5</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.5</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.5</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.json/json -->
    <dependency>
      <groupId>org.json</groupId>
      <artifactId>json</artifactId>
      <version>20180130</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>dly-01</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

控制层

package com.wenxin.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.HashMap;
import java.util.Map;
//用户控制类
@Controller
@ResponseBody//返回json格式数据
public class UserController {
//注册
    @RequestMapping(value = "/register1",method= RequestMethod.GET,produces = "application/json;charset=utf-8")
//    @RequestMapping("/register1")
    public Map register(String user_name, String user_pwd){
        Map map =new HashMap();
        int result=1;
        if(result > 0){
            //注册成功，跳转到登录界面
            //重定向和转发
//            return "redirect:/login.html";
            map.put("code",200);
            map.put("message","登录成功");
        }else{
            //注册失败
            map.put("code",500);
            map.put("message","登录失败");
//            return "redirect:/register.html";
        }

        return map;
    }
    //登录
    @RequestMapping("/login")
    public String login(){
        return null;
    }
}

spring_mvc配置文件

<?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/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">

    <!--1.开启Springioc 自动扫描注解包  只对mvc的包做扫描  -->
    <context:component-scan base-package="com.wenxin.controller"/>

    <!--2. 开启注解，对jackson数据支持 -->
    <mvc:annotation-driven/>

    <!--3. 放行所有的静态资源html+css...-->
    <mvc:default-servlet-handler />

    <!--4.配置视图解析器  -->
    <!-- 配置视图解析器:如何把handle方法返回值解析为实际的物理视图
         name="prefix"代表前面的目录，为空代表根目录  name="suffix"代表返回的地址为后缀为.JSP的文件 -->
    <!--<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">-->
    <!--<property name="prefix" value="/WEB-INF/" />-->
    <!--<property name="suffix" value=".jsp" />-->
    <!--</bean>-->
</beans>

web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <!--Spring核心监听器 -->
  <!--在服务器启动时加载Spring容器，且只会加载一次 -->
<!--  <context-param>-->
<!--    <param-name>contextConfigLocation</param-name>-->
<!--    <param-value>classpath:spring_config.xml</param-value>-->
<!--  </context-param>-->
<!--  <listener>-->
<!--    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>-->
<!--  </listener>-->

  <!--配置springmvc -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--配置初始化参数：作用是配置SpringMVC配置文件的位置和名称 -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring_mvc.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>

  <servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.html</url-pattern>
  </servlet-mapping>

  <!--配置由Spring 提供的针对中文乱码的编码过滤器 -->
  <!-- 编码过滤器 -->
  <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>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

注册界面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
    <script type="text/javascript" src="js/jquery-2.0.3.min.js"></script>
    <script>
        $(function () {
     
            //注册按钮的点击事件
            $("#btn_submit").click(function(){
     
                var user_name = $("input[name=user_name]").val();
                var user_pwd = $("input[name=user_pwd]").val();
                //通过ajax方式传递后台
                $.ajax({
     
                    url:"/register1",  //提交后台URI地址
                    type:"get", //请求方式：get、post
                    data:{
     user_name:user_name,user_pwd:user_pwd}, //提交参数：js对象，json字符串，序列化
                    dataType:"json", //响应类型
                    success:function(response){
      //成功后回调函数
                        if(response.code == 200){
     
                            window.location.href = "/login.html";
                        }
                        if(response.code == 500){
     
                            alert(response.message);
                        }
                    }
                })
            })
        })
    </script>
</head>
<body>
<!--<form action="/register1" method="POST">-->
<!--    <p>-->
<!--        用户名称：<input type="text" name="user_name" />-->
<!--    </p>-->
<!--    <p>-->
<!--        用户密码：<input type="password" name="user_pwd" />-->
<!--    </p>-->
<!--    <p>-->
<!--        <input type="submit" value="注册">-->
<!--    </p>-->
<!--</form>-->
<div>
    <p>
        用户名称：<input type="text" name="user_name" />
    </p>
    <p>
        用户密码：<input type="password" name="user_pwd" />
    </p>
    <p>
        <input id="btn_submit" type="button" value="注册">
    </p>
</div>
</body>
</html>

登录界面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录页面</title>
</head>
<body>
<form action="login" method="post">
    <p>
        用户名称：<input type="text" name="user_name" />
    </p>
    <p>
        用户密码：<input type="password" name="user_pwd" />
    </p>
    <p>
        <input type="submit" value="登录">
    </p>
</form>
</body>
</html>