Initializing parameter Bindings in SPRINGMVC

Initialization parameter bindings are similar to type conversions, with initialization bindings, mostly parameter types

---single date

Configuring binding methods in a processor class using @initbinder annotations

Here first register a user editor parameter one for the target type PropertyEditor for the property editor, where we use the Customdateeditor property editor,

Parameter one is the date format that you want to convert, and parameter two indicates whether NULL is allowed

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;/** *  * @author Jingpeppe * * */@Controllerpublic class mycontroller{     //Processor method    @RequestMapping (value= "/first.do") public    String Dofirst (Date birthday,int age) {        System.out.println ("3333");        return "/welcome.jsp";    }            Customizing a method    @InitBinder public    void Initbinder (Webdatabinder binder) {        DateFormat df=new SimpleDateFormat ("Yyyy-mm-dd");        Binder.registercustomeditor (Date.class, New Customdateeditor (DF, True));    }    }

Just configure a package scanner on the applicationcontext.xml.

<?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/bea NS 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 "> <!--Package Scanner--<context:component-scan base-package= "Cn.controller" ></context:component-scan> </bea Ns>

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" >
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" >
---multiple date formats
Configuration steps:
Using our custom property editor in the processor class
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; @Controllerpublic class mycontroller{     //Processor Method    @ Requestmapping (value= "/first.do") public    String Dofirst (Date birthday,int age) {        System.out.println ("3333") ;        return "/welcome.jsp";    }            Customize a method    @InitBinder public    void Initbinder (Webdatabinder binder) {        System.out.println ("==========");        Binder.registercustomeditor (Date.class, New Mydateeditor ());    }    }
Property Editor
At this point we need to consider which property editor we need to define our own property editor
The approximate configuration method is similar to the single date, only need to change the attribute edit
The custom property editor requires us to inherit propertieseditor, rewrite the Setastext method inside, and use the SetValue method to assign a value
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;/** * * @author Jingpeppe * */public class Mydateeditor extends Pro pertieseditor{/** * Source: Date of String type */@Override public void Setastext (string source) throws Illegalargum                Entexception {//Once error, automatically dispatched to the exception processor SimpleDateFormat Sdf=getdateformat (source);             try {Date date = Sdf.parse (source);        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; }}
Initializing parameter Bindings in SPRINGMVC