sturct2类型转化
类型 转化
2023-09-27 14:26:06 时间
第三种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">
- point:<input name="point" 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>
- point:<s:property value="point"/>
- </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;
- public Point getPoint() {
- return point;
- }
- public void setPoint(Point point) {
- this.point = point;
- }
- public String execute() throws Exception{
- return "success";
- }
- }
6.xwork-conversion.properties(必须与struts.xml同一级包下定义)
- point=com.hitsoft.convert.PointConverter
7.PointConverter.java
- package com.hitsoft.convert;
- import java.util.Map;
- import org.apache.struts2.util.StrutsTypeConverter;
- import com.hitsoft.model.Point;
- public class PointConverter extends StrutsTypeConverter{
- @SuppressWarnings("unchecked")
- @Override
- public Object convertFromString(Map context, String[] values, Class toClass) {
- Point point = new Point();
- String value = values[0];
- String[] result = value.split(",");
- point.setX(Integer.parseInt(result[0]));
- point.setY(Integer.parseInt(result[1]));
- return point;
- }
- @SuppressWarnings("unchecked")
- @Override
- public String convertToString(Map context, Object o) {
- Point point = (Point) o;
- int x = point.getX();
- int y = point.getY();
- String result = "x: " + x + "y:" + y;
- return result;
- }
- }
8.访问地址:
http://localhost:8080/struts2/convert.jsp
输入:
1,2
输出:
point:1,2
说明:这种类型转换的优点是,对于PointConvert转换器,只有项目中用到Point对象转换,就可以自动转换
来源:http://wanglihu.iteye.com/blog/1405647
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