基于注解的数据绑定测试与@SessionAttributes注解的使用

傷城~ 2022-10-01 02:53 81阅读 0赞

代码：

index.jsp

loginForm.jsp

<%@ 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>测试@SessionAttributes注解</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>

welcome.jsp

User.java

package org.fkit.domain;
    
    import java.io.Serializable;
    //域对象，实现序列化接口
    public class User implements Serializable {
    	// 私有字段
        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;
    	}
    	
    }

DataBindingController.java

package org.fkit.controller;
    
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.CookieValue;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestHeader;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    // 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
    public class DataBindingController{
    
    	// 静态的日志类LogFactory
    	private static final Log logger = LogFactory.getLog(DataBindingController.class);
    
    	// 测试@PathVariable注解
    	// 该方法映射的请求为http://localhost:8080/DataBindingTest/pathVariableTest/{userId}
    	@RequestMapping(value="/pathVariableTest/{userId}")
    	 public void pathVariableTest(@PathVariable Integer userId) {
    		 logger.info("通过@PathVariable获得数据： " + userId);
    	 }
    	
    	// 测试@RequestHeader注解
    	// 该方法映射的请求为http://localhost:8080/DataBindingTest/requestHeaderTest
    	@RequestMapping(value="/requestHeaderTest")
    	 public void requestHeaderTest(
    			 @RequestHeader("User-Agent") String userAgent,  
    		     @RequestHeader(value="Accept") String[] accepts) {
    		 logger.info("通过@requestHeaderTest获得数据： " + userAgent);
    		 for(String accept : accepts){
    			 logger.info(accept);
    		 }
    	 }
    	
    	// 测试@CookieValue注解
    	@RequestMapping(value="/cookieValueTest")
    	 public void cookieValueTest( @CookieValue(value="JSESSIONID", defaultValue="") String sessionId) {
    		 logger.info("通过@requestHeaderTest获得数据： " + sessionId);
    	 }
    
    
    }

SessionAttributesController.java

package org.fkit.controller;
    
    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.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.SessionAttributes;
    
    // 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
    // 将Model中的属性名为user的放入HttpSession对象当中
    @SessionAttributes("user")
    public class SessionAttributesController{
    
    	// 静态的日志类LogFactory
    	private static final Log logger = LogFactory.getLog(SessionAttributesController.class);
    	
    	// 该方法映射的请求为http://localhost:8080/DataBindingTest/{formName}
    	@RequestMapping(value="/{formName}")
    	 public String loginForm(@PathVariable String formName){
    		// 动态跳转页面
    		return formName;
    	}
    
    	// 该方法映射的请求为http://localhost:8080/DataBindingTest/login
    	@RequestMapping(value="/login")
    	 public String login(
    			 @RequestParam("loginname") String loginname,
    			 @RequestParam("password") String password,
    			 Model model ) {
    		 // 创建User对象，装载用户信息
    		 User user = new User();
    		 user.setLoginname(loginname);
    		 user.setPassword(password);
    		 user.setUsername("admin");
    		 // 将user对象添加到Model当中
    		 model.addAttribute("user",user);
    		 return "welcome";
    	 }
    	
    	
    
    }

截图：

![Center][]

![Center 1][]

测试@PathVariable注解

![Center 2][]

测试@RequestHeader注解

![Center 3][]

测试@CookieValue注解

![Center 4][]

![Center 5][]

[Center]: /images/20220705/527521b25828408592a5dcc84de53d33.png
[Center 1]: /images/20220705/b06baea69f004ecfb0eccc2ca230368e.png
[Center 2]: /images/20220705/6305507140bf49e5837c67bd9fa84ab5.png
[Center 3]: /images/20220705/7c39f22792af4e9caf2c8fb1250253f4.png
[Center 4]: /images/20220705/bc83e21be1cb4cad86af9310816f3457.png
[Center 5]: /images/20220705/2023698471034534a3855565a0a80c35.png