使用ConversionService转换数据

最新推荐文章于 2025-09-12 15:58:40 发布

原创最新推荐文章于 2025-09-12 15:58:40 发布 · 2.4k 阅读

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#select #数据 #spring #spring mvc #jsp

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本文介绍了一个简单的用户注册流程，包括使用JSP实现的注册页面、用户实体类、日期转换器及控制器。通过这些组件，可以实现从表单输入到后台处理的完整过程。

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：