------------吾亦无他,唯手熟尔，谦卑若愚，好学若饥-------------
上篇博客利用initbinder做了局部的日期类型转换，但是兼容性不要，只支持yyyy-MM-dd这种，所以我们这里进行进一步的优化
其实话说回来了，要想限定格式做最稳定的日期类型转换，就是用日期控件，让用户选，你通过js生成日期数据，这可以省好多麻烦
案例开始：
1.定义一个自己的日期编辑类，继承PropertiesEditor
package cn.dawn.day22initbinder.editor; import org.springframework.beans.propertyeditors.PropertiesEditor; import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Pattern; /**
* Created by Dawn on 2018/3/31.
*/
public class MyDateEdlitor extends PropertiesEditor {
@Override
/*网线打过来的长的像日期的字符串str*/
public void setAsText(String str) throws IllegalArgumentException {
SimpleDateFormat sdf=getSimpleDate(str);
Date date=null;
try {
date = sdf.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
setValue(date);
} private SimpleDateFormat getSimpleDate(String str) {
SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日");
if(Pattern.matches("^\\d{4}-\\d{1,2}-\\d{2}$",str)){
sdf=new SimpleDateFormat("yyyy-MM-dd");
}
if(Pattern.matches("^\\d{4}/\\d{1,2}/\\d{2}$",str)){
sdf=new SimpleDateFormat("yyyy/MM/dd");
}
if(Pattern.matches("^\\d{4}\\d{1,2}\\d{2}$",str)){
sdf=new SimpleDateFormat("yyyyMMdd");
}
return sdf;
}
}
2.自定义处理器和方法
package cn.dawn.day22initbinder; import cn.dawn.day22initbinder.editor.MyDateEdlitor;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.RequestMapping; import java.text.SimpleDateFormat;
import java.util.Date; /**
* Created by Dawn on 2018/3/31.
*/ @Controller
public class MultiController {
/*@InitBinder*/
@InitBinder("birthday")
public void initBinder(WebDataBinder binder){
binder.registerCustomEditor(Date.class,new MyDateEdlitor());
} /*initbinder*/
@RequestMapping("/multiinitbinderFirst")
public String multiinitbinderFirst(String username, Integer userage, Date birthday) throws Exception {
System.out.println("");
System.out.println(username);
System.out.println(userage);
System.out.println(birthday);
return "success";
}
}
3.和上篇博客一样的大配置xml文件，不过我也放上来
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"> <!--包扫描器-->
<context:component-scan base-package="cn.dawn.day22initbinder"></context:component-scan>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/day22/"></property>
<property name="suffix" value=".jsp"></property>
</bean> </beans>
4.修改web.xml的*调度器的上下文配置位置为上面这个xml文件
5.jsp页面：
5.1login.jsp
<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h2>登录</h2>
<form action="${pageContext.request.contextPath}/multiinitbinderFirst" method="post"> 用户名:<input name="username" value="${username}">
年龄:<input name="userage">
生日:<input name="birthday"> <input type="submit" value="登录"/>
</form>
</body>
</html>
5.2success.jsp
<%@ page language="java" pageEncoding="utf-8" isELIgnored="false" %>
<html>
<body>
<%--<img src="data:image/1.jpg">--%>
<h2>Success!</h2>
</body>
</html>
6.启动tomcat，访问login.jsp