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struts1的转换器

//MyActionServlet的代码

package com.actions;

import java.util.Date;

import javax.servlet.ServletException;

import org.apache.commons.beanutils.ConvertUtils;
import org.apache.struts.action.ActionServlet;

import com.convert.DateConvert;

public class MyActionServlet extends ActionServlet {

 
 @Override
 public void init() throws ServletException {
  //这是注册这个转换器,因为ConvertUtils里面有很多转换器
 
  super.init();
  //这句话必须放在Init的后面,因为读actionServlet的源代码会发现,如果你设置了convertNUll = true,那么首先会把所有的转换器全部删掉,
  //然后再注册这些默认的转换器,如果线面代码放在init的前面,那么也会把这个转换器删掉,那么还是会出错。因为formBean的java.util.Date还是不能转换。
  ConvertUtils.register(new DateConvert(), Date.class);
 }
}
 

//action的代码

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.forms.UserForm;


public class UserAction extends DispatchAction {
 
 public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) {
  UserForm userForm = (UserForm) form;
 
  return new ActionForward("/user.jsp");
 }
}

 

//convert的代码

package com.convert;

import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.Converter;

//这个类是将页面传过来的字符窜转换成某个类型
public class DateConvert implements Converter {

//其实我经过测试,struts1是不能进行双向转换器的

 public Object convert(Class clazz, Object arg1) {
  //如果桌面的日期的书写形式是yyyy/MM/dd,那么我们这里的格式化形式就是这种类型,如果是其他的形式就是其他的形式
  SimpleDateFormat 易做图DateFormat = new SimpleDateFormat("yyyy-MM-dd");
 
//  if(clazz == String.class)
//  {
  
   String des = (String)arg1;
   java.util.Date date  = null;
   try {
    //这是将String类型转换成Date类型
    date = 易做图DateFormat.parse(des);
   } catch (ParseException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
    return date;
//  }
//  else if(clazz == Date.class)
//  {
//   Date des = (Date)arg1;
//   java.lang.String date  = null;
//   try {
//    //这是将日期转换成string类型
//    date = 易做图DateFormat.format(des);
//   } catch (Exception e) {
//    // TODO Auto-generated catch block
//    e.printStackTrace();
//   }
//    return date;
//  }
//  else
//   return null;
 }

}
 

//form的代码

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.forms;

import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;


public class UserForm extends ActionForm {

 private Date date;
 private String name;
 private int id;
 public int getId() {
  return id;
 }


 public void setId(int id) {
  this.id = id;
 }


 public ActionErrors validate(ActionMapping mapping,
   HttpServletRequest request) {
  return null;
 }

 
 public void reset(ActionMapping mapping, HttpServletRequest request) {
  // TODO Auto-generated method stub
 }

 
 public Date getDate() {
  return date;
 }

 
 public void setDate(Date date) {
  this.date = date;
 }

 
 public String getName() {
  return name;
 }

 
 public void setName(String name) {
  this.name = name;
 }
}

 

//web.xml的代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>com.actions.MyActionServlet</servlet-class>
    <init-param>
    <!-- 设置这个,那么在页面的所有的界面都会设置为空,假如页面有一个身高(如果在formBean中用 int height对应),那么它的出事值会是0,这样不好看,但是如果设置了这个convertNULL,那么就会出现为空 -->
      <param-name>convertNull</param-name>
      <param-value>1</param-value>
    </init-param>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 

//struts-config的代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="userFo

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