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
2.convertResult.jsp
3.Point.java(POJO类)
4.struts.xml
5.ConvertAction.java
6.ConvertAction-conversion.properties(必须与ConvertAction类在同一级包下定义)
7.PointConverter.java
8.Point2Converter.java
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。
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;
}
@Override
public 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" class="com.hitsoft.action.ConvertAction">
<result name="success">/convertResult.jsp</result>
</action>
</package>
</struts>
5.ConvertAction.java
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.PointConverter point2=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{
@Override
public 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{
@Override
public 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。