使用ConversionService转换数据

小咪咪 2022-10-01 02:51 125阅读 0赞

代码：

registerForm.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>测试ConversionService</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>生日: </label></td>
                 <td><input type="text" id="birthday" name="birthday" ></td>
             </tr>
             <tr>
                 <td><input id="submit" type="submit" value="登录"></td>
             </tr>
         </table>
    </form>
    </body>
    </html>

success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
    <!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ConversionService</title>
    </head>
    <body>
    登录名：${requestScope.user.loginname }<br>
    生日：<fmt:formatDate value="${requestScope.user.birthday}" pattern="yyyy年MM月dd日"/><br>
    </body>
    </html>

User.java

package com.bean;
    
    import java.io.Serializable;
    import java.util.Date;
    
    public class User implements Serializable {
    	private String loginname;
    	private Date birthday;
    	public User() {
    		super();
    		// TODO Auto-generated constructor stub
    	}
    	public String getLoginname() {
    		return loginname;
    	}
    	public void setLoginname(String loginname) {
    		this.loginname = loginname;
    	}
    	public Date getBirthday() {
    		return birthday;
    	}
    	public void setBirthday(Date birthday) {
    		this.birthday = birthday;
    	}
    	@Override
    	public String toString() {
    		// TODO Auto-generated method stub
    		return "User [loginname=" + loginname + ", birthday=" + birthday + "]";
    	}
    	
    }

StringToDateConverter.java

package com.Converter;
    
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import org.springframework.core.convert.converter.Converter;
    
    // 实现Converter<S,T>接口
    public class StringToDateConverter implements Converter<String, Date>{
    	private String datePattern;	
    	public void setDatePattern(String datePattern) {
    		this.datePattern = datePattern;
    	}
    
    	// Converter<S,T>接口的类型转换方法
    	@Override
    	public Date convert(String date) {
    		try {
    			SimpleDateFormat dateFormat = new SimpleDateFormat(this.datePattern);
    			// 将日期字符串转换成Date类型返回
    			return dateFormat.parse(date);
    		} catch (Exception e) {
    			e.printStackTrace();
    			System.out.println("日期转换失败!");
    			return null;
    		}
    		
    	}
    
    }

UserController.java

package com.control;
    
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import com.bean.*;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    
    @Controller
    public class UserController{
    	private static final Log logger = LogFactory.getLog(UserController.class);
    	 
    	@RequestMapping(value="/{formName}")
    	 public String loginForm(@PathVariable String formName){	
    		// 动态跳转页面
    		return formName;
    	}
    	 
    	 @RequestMapping(value="/register",method=RequestMethod.POST)
    	 public String register(@ModelAttribute User user,Model model) {
    		 logger.info(user);
    		 model.addAttribute("user", user);
    	     return "success";
    	 }
    
    }

截图：

![Center][]

![Center 1][]

[Center]: /images/20220705/68e32598f70249b68b8c0201771897ad.png
[Center 1]: /images/20220705/42342b3145c5433b910d749682ec5b36.png