Struts2的自定义类型转换器实例

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CircleConverter.java

package com.liuxi.typeconverter;import java.util.Map;import org.apache.struts2.util.StrutsTypeConverter;import com.liuxi.bean.Circle;import com.liuxi.bean.Point;/** * * @author liuxi * *Aug 18, 2010 5:21:17 PM *圆的转换器 */public class CircleConverter extends StrutsTypeConverter{@Overridepublic Object convertFromString(Map context, String[] values, Class toClass) {Circle circle=new Circle();Point center=new Point();String centerValues[]=values[0].split(",");double x=Double.parseDouble(centerValues[0]);double y=Double.parseDouble(centerValues[1]);center.setX(x);center.setY(y);circle.setRadius(Double.parseDouble(centerValues[2]));circle.setCenter(center);return circle;}@Overridepublic String convertToString(Map context, Object value) {Circle circle=(Circle)value; return circle.toString();}}

CircleAction.java

package com.liuxi.typeconverter;import com.liuxi.bean.Circle;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionContext;public class CircleAction implements Action { private Circle circle;public Circle getCircle() {return circle;}public void setCircle(Circle circle) {this.circle = circle;}public String execute(){System.out.println("在CircleAction中输出圆的信息");System.out.println(this.getCircle());ActionContext.getContext().put("circle", circle);return SUCCESS;}}

在包com.liuxi.typeconverter下创建文件CircleAction-conversion.properties:

circle=com.liuxi.typeconverter.CircleConverter

jsp页面:

createCircle.jsp页面：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>输入一个圆</title></head><body> <TABLE bgcolor="orange" width="100%"> <tr ><td align="center">自定义类型转换器测试</td></tr> </TABLE> <s:form action="createCircle"> <table align="center" border="1" > <tr ><td colspan="2"><font color="#3737DE">按要求输入数据就能创建一个圆哦</font></td></tr> <tr> <td> <input type="text" name="circle"/> </td> <td> <font color="red">x,y,radius</font> </td> </tr> <tr><td colspan="3" align="center"><s:submit value="submit"/></td></tr> </table> </s:form></body></html>

circleMessage.jsp页面:

在struts.xml中配置:

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <package name="converter" extends="struts-default" > <action name="createCircle" class="com.liuxi.typeconverter.CircleAction"> <result>/circleMessage.jsp</result> </action> </package> </struts>

运行效果:

数据输入页面:

结果显示: