springMVC初始化绑定器
单日期
在处理器类中配置绑定方法 使用@InitBinder注解
在这里首先注册一个用户编辑器 参数一为目标类型 propertyEditor为属性编辑器，此处我们选用 CustomDateEditor属性编辑器，
参数一为想转换的日期格式，参数二表示是否允许为空
package cn.controller;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
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;
@Controller
public class MyController{
//处理器方法
@RequestMapping(value="/first.do")
public String doFirst(Date birthday,int age) {
System.out.println("-----------------3333-----------------");
return "/welcome.jsp";
}
//自定义一个方法
@InitBinder
public void initBinder(WebDataBinder binder){
DateFormat df=new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, new CustomDateEditor(df, true));
}
}
只需在applicationContext.xml配置一个包扫描器就行
<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<!-- 包扫描器 -->
<context:component-scan base-package="cn.controller"></context:component-scan>
</beans>
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head
<title></title>
</head>
<body>
<form action="${pageContext.request.contextPath }/first.do" method="post">
出生日期:<input name="birthday" value="${birthday }"/>${birthdayerror }
年龄:<input name="age" value="${age }"/>${ageerror }
<input type="submit" value="注册"/>
</form>
${ex.message }
</body> </html>
welcome.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>欢迎页面</title>
</head>
<body>
<h1>欢迎访问${uname },${param.uage }</h1>
</body>
</html>
多日期格式
配置步骤：
在处理器类中使用我们自定的属性编辑器
MyController.java
package cn.controller;
import java.util.Date;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class MyController{
//处理器方法
@RequestMapping(value="/first.do")
public String doFirst(Date birthday,int age) {
System.out.println("--------------------3333--------------------");
return "/welcome.jsp";
}
//自定义一个方法
@InitBinder
public void initBinder(WebDataBinder binder){
binder.registerCustomEditor(Date.class, new MyDateEditor());
}
}
属性编辑器
此时我们需要考虑使用哪个属性编辑器，需要定义自己的属性编辑器
大致的配置方式如单日期相似，只需要更换属性编辑即可
自定义的属性编辑器，需要我们继承PropertiesEditor，重写里面的setAsText方法，使用setValue方法赋值
MyDateEditor.java
package cn.controller;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Pattern;
import org.springframework.beans.TypeMismatchException;
import org.springframework.beans.propertyeditors.PropertiesEditor;
public class MyDateEditor extends PropertiesEditor{
@Override
public void setAsText(String str) throws Exception {
//一旦报错，自动调度到异常处理器
SimpleDateFormat sdf=getDateFormat(str);
try {
Date date = sdf.parse(str);
setValue(date);
} catch (ParseException e) {
e.printStackTrace();
}
}
private SimpleDateFormat getDateFormat(String source){
SimpleDateFormat sdf=new SimpleDateFormat();
if (Pattern.matches("^\\d{4}-\\d{2}-\\d{2}$", source)) {
sdf=new SimpleDateFormat("yyyy-MM-dd");
}else if (Pattern.matches("^\\d{4}/\\d{2}/\\d{2}$", source)) {
sdf=new SimpleDateFormat("yyyy/MM/dd");
}else if (Pattern.matches("^\\d{4}\\d{2}\\d{2}$", source)) {
sdf=new SimpleDateFormat("yyyyMMdd");
}else {
throw new TypeMismatchException("",Date.class);
}
return sdf;
}
}
