@RequestMapping和RequestParam注解的使用
2017-03-21 22:00
363 查看
1.在Web.xml中配置前端控制器DispatcherServlet
[html] view
plain copy
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>RequestMappingTest</display-name>
<!-- 定义Spring MVC的前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 让Spring MVC的前端控制器拦截所有请求 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 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>
2.配置Spring MVC的Controller
springmvc-config.xml
[html] view
plain copy
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">
<!-- spring可以自动去扫描base-pack下面的包或者子包下面的java文件，
如果扫描到有Spring的相关注解的类，则把这些类注册为Spring的bean -->
<context:component-scan base-package="org.fkit.controller"/>
<!-- 视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix">
<value>/WEB-INF/content/</value>
</property>
<!-- 后缀 -->
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
3.前端页面
loginForm.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录页面</title>
</head>
<body>
<h3>登录页面</h3>
<form action="login" method="post">
<table>
<tr>
<td><label>登录名: </label></td>
<td><input type="text" id="loginname" name="loginname" ></td>
</tr>
<tr>
<td><label>密码: </label></td>
<td><input type="password" id="password" name="password"></td>
</tr>
<tr>
<td><input id="submit" type="submit" value="登录"></td>
</tr>
</table>
</form>
</body>
</html>
registerForm.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册页面</title>
</head>
<body>
<h3>注册页面</h3>
<form action="register" method="post">
<table>
<tr>
<td><label>登录名: </label></td>
<td><input type="text" id="loginname" name="loginname" ></td>
</tr>
<tr>
<td><label>密码: </label></td>
<td><input type="password" id="password" name="password"></td>
</tr>
<tr>
<td><label>真实姓名: </label></td>
<td><input type="text" id="username" name="username" ></td>
</tr>
<tr>
<td><input id="submit" type="submit" value="注册"></td>
</tr>
</table>
</form>
</body>
</html>
welcome.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>测试@RequestMapping注解</title>
</head>
<body>
<!-- 页面可以访问Controller传递传递出来的模型User对象 -->
欢迎[${requestScope.user.username }]登陆
<br>
</body>
</html>
4.后端的实现
User.Java
[java] view
plain copy
package org.fkit.domain;
import java.io.Serializable;
//域对象，实现序列化接口
public class User implements Serializable {
private String loginname;
private String password;
private String username;
public User() {
super();
// TODO Auto-generated constructor stub
}
public String getLoginname() {
return loginname;
}
public void setLoginname(String loginname) {
this.loginname = loginname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
UserController.java
[java] view
plain copy
package org.fkit.controller;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.fkit.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
//Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
@Controller
//RequestMapping可以用来注释一个控制器类，此时，所有方法都将映射为相对于类级别的请求,
//表示该控制器处理所有的请求都被映射到 value属性所指示的路径下
@RequestMapping(value="/user")
public class UserController {
// 静态List<User>集合，此处代替数据库用来保存注册的用户信息
private static List<User> userList;
// UserController类的构造器，初始化List<User>集合
public UserController() {
super();
userList = new ArrayList<User>();
// TODO Auto-generated constructor stub
}
// 静态的日志类LogFactory
private static final Log logger = LogFactory.getLog(UserController.class);
// 该方法映射的请求为http://localhost:8080/context/user/register，该方法支持GET请求
@RequestMapping(value="/register",method=RequestMethod.GET)
public String registerForm() {
logger.info("register GET方法被调用...");
// 跳转到注册页面
return "registerForm";
}
// 该方法映射的请求为http://localhost:8080/RequestMappingTest/user/register，该方法支持POST请求
@RequestMapping(value="/register",method=RequestMethod.POST)
// 将请求中的loginname参数的值赋给loginname变量,password和username同样处理
public String register(@RequestParam("loginname") String loginname,
@RequestParam("password") String password,
@RequestParam("username") String username){
logger.info("register POST方法被调用...");
// 创建User对象
User user=new User();
user.setLoginname(loginname);
user.setPassword(password);
user.setUsername(username);
// 模拟数据库存储User信息
userList.add(user);
// 跳转到登录页面
return "loginForm";
}
// 该方法映射的请求为http://localhost:8080/RequestMappingTest/user/login
@RequestMapping("/login")
public String login(
// 将请求中的loginname参数的值赋给loginname变量,password同样处理
@RequestParam("loginname") String loginname,
@RequestParam("password") String password,
Model model){
logger.info("登录名:"+loginname + " 密码:" + password);
// 到集合中查找用户是否存在，此处用来模拟数据库验证
for(User user :userList){
if(user.getLoginname().equals(loginname) && user.getPassword().equals(password)){
model.addAttribute("user",user);
return "welcome";
}
}
return "loginForm";
}
}
截图：
------->源码：百度网盘极速下载
[html] view
plain copy
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>RequestMappingTest</display-name>
<!-- 定义Spring MVC的前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 让Spring MVC的前端控制器拦截所有请求 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 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>
2.配置Spring MVC的Controller
springmvc-config.xml
[html] view
plain copy
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">
<!-- spring可以自动去扫描base-pack下面的包或者子包下面的java文件，
如果扫描到有Spring的相关注解的类，则把这些类注册为Spring的bean -->
<context:component-scan base-package="org.fkit.controller"/>
<!-- 视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix">
<value>/WEB-INF/content/</value>
</property>
<!-- 后缀 -->
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
3.前端页面
loginForm.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录页面</title>
</head>
<body>
<h3>登录页面</h3>
<form action="login" method="post">
<table>
<tr>
<td><label>登录名: </label></td>
<td><input type="text" id="loginname" name="loginname" ></td>
</tr>
<tr>
<td><label>密码: </label></td>
<td><input type="password" id="password" name="password"></td>
</tr>
<tr>
<td><input id="submit" type="submit" value="登录"></td>
</tr>
</table>
</form>
</body>
</html>
registerForm.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册页面</title>
</head>
<body>
<h3>注册页面</h3>
<form action="register" method="post">
<table>
<tr>
<td><label>登录名: </label></td>
<td><input type="text" id="loginname" name="loginname" ></td>
</tr>
<tr>
<td><label>密码: </label></td>
<td><input type="password" id="password" name="password"></td>
</tr>
<tr>
<td><label>真实姓名: </label></td>
<td><input type="text" id="username" name="username" ></td>
</tr>
<tr>
<td><input id="submit" type="submit" value="注册"></td>
</tr>
</table>
</form>
</body>
</html>
welcome.jsp
[html] view
plain copy
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>测试@RequestMapping注解</title>
</head>
<body>
<!-- 页面可以访问Controller传递传递出来的模型User对象 -->
欢迎[${requestScope.user.username }]登陆
<br>
</body>
</html>
4.后端的实现
User.Java
[java] view
plain copy
package org.fkit.domain;
import java.io.Serializable;
//域对象，实现序列化接口
public class User implements Serializable {
private String loginname;
private String password;
private String username;
public User() {
super();
// TODO Auto-generated constructor stub
}
public String getLoginname() {
return loginname;
}
public void setLoginname(String loginname) {
this.loginname = loginname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
UserController.java
[java] view
plain copy
package org.fkit.controller;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.fkit.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
//Controller注解用于指示该类是一个控制器，可以同时处理多个请求动作
@Controller
//RequestMapping可以用来注释一个控制器类，此时，所有方法都将映射为相对于类级别的请求,
//表示该控制器处理所有的请求都被映射到 value属性所指示的路径下
@RequestMapping(value="/user")
public class UserController {
// 静态List<User>集合，此处代替数据库用来保存注册的用户信息
private static List<User> userList;
// UserController类的构造器，初始化List<User>集合
public UserController() {
super();
userList = new ArrayList<User>();
// TODO Auto-generated constructor stub
}
// 静态的日志类LogFactory
private static final Log logger = LogFactory.getLog(UserController.class);
// 该方法映射的请求为http://localhost:8080/context/user/register，该方法支持GET请求
@RequestMapping(value="/register",method=RequestMethod.GET)
public String registerForm() {
logger.info("register GET方法被调用...");
// 跳转到注册页面
return "registerForm";
}
// 该方法映射的请求为http://localhost:8080/RequestMappingTest/user/register，该方法支持POST请求
@RequestMapping(value="/register",method=RequestMethod.POST)
// 将请求中的loginname参数的值赋给loginname变量,password和username同样处理
public String register(@RequestParam("loginname") String loginname,
@RequestParam("password") String password,
@RequestParam("username") String username){
logger.info("register POST方法被调用...");
// 创建User对象
User user=new User();
user.setLoginname(loginname);
user.setPassword(password);
user.setUsername(username);
// 模拟数据库存储User信息
userList.add(user);
// 跳转到登录页面
return "loginForm";
}
// 该方法映射的请求为http://localhost:8080/RequestMappingTest/user/login
@RequestMapping("/login")
public String login(
// 将请求中的loginname参数的值赋给loginname变量,password同样处理
@RequestParam("loginname") String loginname,
@RequestParam("password") String password,
Model model){
logger.info("登录名:"+loginname + " 密码:" + password);
// 到集合中查找用户是否存在，此处用来模拟数据库验证
for(User user :userList){
if(user.getLoginname().equals(loginname) && user.getPassword().equals(password)){
model.addAttribute("user",user);
return "welcome";
}
}
return "loginForm";
}
}
截图：
------->源码：百度网盘极速下载
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