代碼：
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>測試Formatter接口</title>
</head>
<body>
<h3>注冊頁面</h3>
<form action="register" method="post">
<table>
<tr>
<td><label>登入名: </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="登入"></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>測試Formatter</title>
</head>
<body>
登入名：${requestScope.user.loginname }<br>
生日：<fmt:formatDate value="${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;
// 域對象，實作序列化接口
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() {
return "User [loginname=" + loginname + ", birthday=" + birthday + "]";
}
}
DateFormatter.java
package com.formatter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import org.springframework.format.Formatter;
public class DateFormatter implements Formatter<Date> {
// 日期類型模闆：如yyyy-MM-dd
private String datePattern;
// 日期格式化對象
private SimpleDateFormat dateFormat;
// 構造器，通過依賴注入的日期類型建立日期格式化對象
public DateFormatter(String datePattern) {
this.datePattern = datePattern;
this.dateFormat = new SimpleDateFormat(datePattern);
}
// 顯示Formatter<T>的T類型對象
public String print(Date date,Locale locale){
return dateFormat.format(date);
}
// 解析文本字元串傳回一個Formatter<T>的T類型對象。
public Date parse(String source, Locale locale) throws ParseException {
try {
return dateFormat.parse(source);
} catch (Exception e) {
throw new IllegalArgumentException();
}
}
}
UserController.java
package com.control;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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;
import com.bean.User;
@Controller
public class UserController{
private static final Log logger = LogFactory.getLog(UserController.class);
@RequestMapping(value="/{formName}")
public String loginForm(@PathVariable String formName){
// 動态跳轉頁面
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";
}
}
截圖：
效果與ConversionService轉換資料差不多。