Struts学习之局部类型转换器以及全局类型转换器
HelloWorld:
package cn.com.user;
import java.util.Date;
public class HelloWorld {
private String message;
private String savePath;
private Date birthday;
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
System.out.println(birthday);
this.birthday = birthday;
}
public String getSavePath() {
return savePath;
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String execute()
{
message="我的第一个struts应用！";
return "success";
}
}
过滤器：
package cn.com.user;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
public class DefaultTypeConverter extends
com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter {
@Override
public Object convertValue(Map<String, Object> context, Object value,
Class toType) {
SimpleDateFormat dateFormat=new SimpleDateFormat("yyyyMMdd");
try
{
if(toType==Date.class)
{
String[] params=(String[])value;
return dateFormat.parse(params[0]);
}
else if(toType==String.class)
{
Date date=(Date)value;
return dateFormat.format(date);
}
}
catch(ParseException e)
{
}
return null;
}
}
局部过滤器配置文件（名为HelloWorld-conversion.properties）：
birthday=cn.com.user.DefaultTypeConverter
全局过滤器配置文件（名为xwork-conversion.properties）：
java.util.Date=cn.com.user.DefaultTypeConverter
JSP界面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Struts</title>
</head>
<body>
<!-- 调用的是getMessage()方法 -->
${message}
<br/>
${savePath}
<br/>
${birthday}
</body>
</html>
struts配置xml文件：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <!-- 设定访问的后缀名 <constant name="struts.action.extension" value="do,action"></constant> --> <package name="struts" namespace="/test" extends="struts-default"> <action name="helloworld" class="cn.com.user.HelloWorld" method="execute"> <param name="savePath">/image</param><!-- 这是为了action的属性注入值 --> <result name="success">/WEB-INF/userOK.jsp</result> </action> </package> </struts>