fmt標籤實現日期格式化，與型別轉換Converter
阿新 • • 發佈：2018-11-02
一.頁面展示時間型別資料
1.引入標頭檔案：<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
2.將從後臺取出的時間型別資料按yyyy-MM-dd格式，格式化；
<td><fmt:formatDate value="${u.birthday }" pattern="yyyy-MM-dd"/> </td>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript"> function deleteUser(userId,userName){ if(window.confirm("您確定要刪除使用者["+userName+"]嗎？")){ location.href="${pageContext.request.contextPath }/user/"+userId+"/delete.action"; } } </script> </head> <body> <h1>使用者列表</h1> <table border="1" cellpadding="0" cellspacing="0"> <tr> <th><input type="checkbox"/></th> <th>編號</th> <th>姓名</th> <th>生日</th> <th>性別</th> <th>地址</th> <th>操作</th> </tr> <c:forEach items="${users }" var="u" varStatus="status"> <c:if test="${status.index%2==0 }"> <tr style="background-color: #ccc"> </c:if> <c:if test="${status.index%2!=0 }"> <tr> </c:if> <td><input type="checkbox" value="${u.id }" name="uid"/></td> <td>${u.id }</td> <td>${u.username }</td> <td><fmt:formatDate value="${u.birthday }" pattern="yyyy-MM-dd"/> </td> <td>${u.sex==1?'男':'女' }</td> <td>${u.address }</td> <td> <a href="">檢視</a>/ <a href="${pageContext.request.contextPath }/editUser.action?id=${u.id }">修改</a>/ <a onclick="deleteUser(${u.id},'${u.username} }')" href="javascript:void(0)">刪除</a> </td> </tr> </c:forEach> </table> </body> </html>
二.後臺時間型別欄位接收前臺傳來的時間字串
1.自定義時間字串轉換類DateConverter繼承 Converter<String, Date>
註明：Converter這個類可以轉換任何型別，用的最多的是時間轉換；
package com.igeek.ssm.ex.converters; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import org.springframework.core.convert.converter.Converter; /** * @author www.igeehome.com * * TODO * * 2018年10月24日下午7:57:37 */ public class DateConverter implements Converter<String, Date> { @Override public Date convert(String dateStr) { Date date = null; SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { date = dateFormat.parse(dateStr); } catch (ParseException e) { //e.printStackTrace(); dateFormat = new SimpleDateFormat("yyyy-MM-dd"); try { date = dateFormat.parse(dateStr); } catch (ParseException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } return date; } }
2.springMVC.xml中配置：
<!-- 配置註解驅動 --> <!-- 如果配置此標籤,可以不用配置... --> <mvc:annotation-driven conversion-service="conversionService" /> <!-- 配置型別轉換器 --> <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="converters"> <set> <bean class="com.igeek.ssm.ex.converters.DateConverter" /> </set> </property> </bean>
3.頁面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>新增使用者</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/addUser.action" method="post">
<p>使用者名稱:<input type="text" name="username"/></p>
<p>生日:<input type="date" name="birthday"/></p>
<p>性別:<input type="radio" name="sex" value="1"/>男
<input type="radio" name="sex" value="2"/>女</p>
<p>地址:<input type="text" name="address"/></p>
<p><input type="submit" value="新增"/></p>
</form>
</body>
</html>4.後臺接收：
@RequestMapping("/addUser")
public String addUser(User user) {
userService.saveUser(user);
// 無論是否成功，進入列表頁面
// 重定向進入url：userList.action
return "redirect:userList.action";
}
5.實體類：
package com.igeek.ssm.ex.pojo;
import java.util.Date;
/**
* @author www.igeehome.com
*
* TODO
*
* 2018年10月29日下午7:48:30
*/
public class User implements java.io.Serializable{
private int id;
private String username;
private Date birthday;
private int sex;
private String address;
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(int id) {
this.id = id;
}
/**
* @return the username
*/
public String getUsername() {
return username;
}
/**
* @param username the username to set
*/
public void setUsername(String username) {
this.username = username;
}
/**
* @return the birthday
*/
public Date getBirthday() {
return birthday;
}
/**
* @param birthday the birthday to set
*/
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
/**
* @return the sex
*/
public int getSex() {
return sex;
}
/**
* @param sex the sex to set
*/
public void setSex(int sex) {
this.sex = sex;
}
/**
* @return the address
*/
public String getAddress() {
return address;
}
/**
* @param address the address to set
*/
public void setAddress(String address) {
this.address = address;
}
}