struts2类型转换实现1（通过继承DefaultTypeConverter抽象类）
一.第一种struts2类型转换方式实例
1.convert.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>类型转换</title> </head> <body> <form action="convert.action" method="post"> point1:<input name="point" type="text"></br> point2:<input name="point2" type="text"></br> <input type="submit" value="submit"> </form> </body></html>
2.convertResult.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%><%@ taglib uri="/struts-tags" prefix="s" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>类型转换结果页面</title> </head> <body> point1:<s:property value="point"/><br> point2:<s:property value="point2"/> </body></html>
3.Point.java(POJO类)
package com.hitsoft.model;public class Point {private int x;private int y;public int getX() {return x;}public void setX(int x) {this.x = x;}public int getY() {return y;}public void setY(int y) {this.y = y;}@Overridepublic String toString() {String result = "x = " + x + " , y = " +y;return result;}}4.struts.xml
<?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="struts2" extends="struts-default"><action name="convert" name="code">package com.hitsoft.action;import java.util.Date;import com.hitsoft.model.Point;import com.opensymphony.xwork2.ActionSupport;public class ConvertAction extends ActionSupport{private Point point;private Point point2;public Point getPoint() {return point;}public void setPoint(Point point) {this.point = point;}public Point getPoint2() {return point2;}public void setPoint2(Point point2) {this.point2 = point2;}public String execute() throws Exception{return "success";}}6.ConvertAction-conversion.properties(必须与ConvertAction类在同一级包下定义)
point=com.hitsoft.convert.PointConverterpoint2=com.hitsoft.convert.Point2Converter
7.PointConverter.java
package com.hitsoft.convert;import java.util.Map;import com.hitsoft.model.Point;import ognl.DefaultTypeConverter;public class PointConverter extends DefaultTypeConverter{@Overridepublic Object convertValue(Map context, Object value, Class toType) {if(Point.class == toType){String[] str = (String[])value;String firstValue = str[0];String[] resultValue = firstValue.split(",");Point point = new Point();point.setX(Integer.parseInt(resultValue[0]));point.setY(Integer.parseInt(resultValue[1]));return point;}else if(String.class == toType){Point point = (Point)value;int x = point.getX();int y = point.getY();String result = "x: " + x + "y:" + y;return result;}return null;}}8.Point2Converter.java
package com.hitsoft.convert;import java.util.Map;import com.hitsoft.model.Point;import ognl.DefaultTypeConverter;public class Point2Converter extends DefaultTypeConverter{@Overridepublic Object convertValue(Map context, Object value, Class toType) {if(Point.class == toType){String[] str = (String[])value;String firstValue = str[0];String[] resultValue = firstValue.split(",");Point point = new Point();point.setX(Integer.parseInt(resultValue[0]));point.setY(Integer.parseInt(resultValue[1]));return point;}else if(String.class == toType){Point point = (Point)value;int x = point.getX();int y = point.getY();String result = "x: " + x + "y:" + y;return result;}return null;}}9.访问地址：
http://localhost:8080/struts2/convert.jsp
输入：
1,2
3,4
输出：
point1:1,2
point2:3,4
说明：这种类型转换不能代码复用，有多个对象转换时就需要编写多个转换器。
point1:1,2 point2:3,4
都没有执行这个判断
}else if(String.class == toType){ Point point = (Point)value; int x = point.getX(); int y = point.getY(); String result = "x: " + x + "y:" + y; return result; } 或者是调用Point类的toString方法~