大家好!新的一天,新的开始。加油哦!我今天要讲解的是struts2中的数据转换。由于今天我时间很紧。只能将示例展示给大家自学。如果有不懂的地方可以留言。
首先是view(input.jsp)
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'input.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<h1>用逗号将点的两个坐标分开</h1>
<s:form action="pointConverter">
<s:textfield name="point" label="点"></s:textfield>
<s:textfield name="age" label="年龄"></s:textfield>
<s:textfield name="username" label="用户名"></s:textfield>
<s:textfield name="date" label="日期"></s:textfield>
<s:submit name="submit" label="submit"></s:submit>
</s:form>
</body>
</html>
接下来是output.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'output.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
point:
<s:property value="point" /><br>
age:
<s:property value="age" /><br>
username:
<s:property value="username" /><br>
date:
<s:property value="date" />
</body>
</html>
转换类的编写:
package com.newstar.struts2.pojo;
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;
}
}
package com.newstar.struts2.converter;
import java.util.Map;
import org.apache.struts2.util.StrutsTypeConverter;
import com.newstar.struts2.pojo.Point;
public class PointConverter2 extends StrutsTypeConverter {
@Override
public Object convertFromString(Map map, String[] arg1, Class arg2) {
String[] temp = arg1[0].split(",");
int x = Integer.parseInt(temp[0]);
int y = Integer.parseInt(temp[1]);
Point point = new Point();
point.setX(x);
point.setY(y);
return point;
}
@Override
public String convertToString(Map map, Object object) {
Point point = (Point) object;
int x = point.getX();
int y = point.getY();
String result = x + "," + y;
return result;
}
}
action编写:
package com.newstar.struts2.action;
import java.util.Date;
import com.newstar.struts2.pojo.Point;
import com.opensymphony.xwork2.ActionSupport;
public class PointConverterAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1825693787594339645L;
private Point point;
private int age;
private String username;
private Date date;
public Point getPoint() {
return point;
}
public void setPoint(Point point) {
this.point = point;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
@Override
public String execute() throws Exception {
return SUCCESS;
}
}
转换的资源文件配置:分两种:全局转换,局部转换。
全局转换的资源文件名必须以xwork-convertion.properties命名。存放位置:src下。
局部转换必须以转换类名+“-convertion.properties”命名。存放位置:和Action放在同一个目录下即可。
其实他编译后会在class目录下。大家可以在服务器下面找到。
下面说下方法:
这是全局转换的资源文件代码:com.newstar.struts2.pojo.Point=com.newstar.struts2.converter.PointConverter2
这是局部转换的资源文件爱你代码:point=com.newstar.struts2.converter.PointConverter
两者选其一而用之即可。
struts.xml配置文件和我讲解的Struts2第3期的方式是一样的。大家可以去看看。
web.xml文件没改变。
今天实在是对不住大家了,太忙了!这篇如果没有讲解真的有点不好懂。唉,真是很不好办啊。我也是没办法,现在日子不好过啊!看哪天我有时间了,在把这篇补回来吧!
goodbye!