struts2-写自己的转换器
b) 写自己的转换器：
c) 三种注册方式：i. 局部：XXXAction-conversion.properties
1. p（属性名称） = converter
ii. 全局：xwork-conversion.properties
1. com.xxx.XXX（类名）= converter
iii. Annotation
d) 如果遇到非常麻烦的映射转换i. request.setAttribute();
ii. session
如果遇到不能转换的类型，就到属性文件里面去看有没有转换器
1. p（属性名称） = converter
ii. 全局：xwork-conversion.properties
1. com.xxx.XXX（类名）= converter
iii. Annotation
public class MyPointConverter extends DefaultTypeConverter{
@Override
public Object convertValue(Object value, Class toType) {
if(toType == Point.class) {
Point p = new Point();
String[] strs = (String[])value;
String[] xy = strs[0].split(",");
p.x = Integer.parseInt(xy[0]);
p.y = Integer.parseInt(xy[1]);
return p;
}
if(toType == String.class) {
return value.toString();
}
return super.convertValue(value, toType);
}
}
public class MyPointConverter extends StrutsTypeConverter{
@Override
public Object convertFromString(Map context, String[] values, Class toClass) {
Point p = new Point();
String[] strs = (String[])values;
String[] xy = strs[0].split(",");
p.x = Integer.parseInt(xy[0]);
p.y = Integer.parseInt(xy[1]);
return p;
}
@Override
public String convertToString(Map context, Object o) {
// TODO Auto-generated method stub
return o.toString();
}
}
c) 三种注册方式：i. 局部：XXXAction-conversion.properties
1. p（属性名称） = converter
ii. 全局：xwork-conversion.properties
1. com.xxx.XXX（类名）= converter
iii. Annotation
d) 如果遇到非常麻烦的映射转换i. request.setAttribute();
ii. session
package com.hugui.action;
import java.awt.Point;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.opensymphony.xwork2.ActionSupport;
public class TestAction extends ActionSupport {
private String name;
private int age;
private Date d;
//传值:interests=example
Set<String> interests;
//传值：user['key']=value
Map<String, String> users;
//传值：p.x=4&p.y=5
Point p;
List<Point> ps;
Map<String, Point> points;
@Override
public String execute() throws Exception {
return super.execute();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Date getD() {
return d;
}
public void setD(Date d) {
this.d = d;
}
public Set<String> getInterests() {
return interests;
}
public void setInterests(Set<String> interests) {
this.interests = interests;
}
public Map<String, String> getUsers() {
return users;
}
public void setUsers(Map<String, String> users) {
this.users = users;
}
public Point getP() {
return p;
}
public void setP(Point p) {
this.p = p;
}
public List<Point> getPs() {
return ps;
}
public void setPs(List<Point> ps) {
this.ps = ps;
}
public Map<String, Point> getPoints() {
return points;
}
public void setPoints(Map<String, Point> points) {
this.points = points;
}
}
package com.bjsxt.converter;
import java.awt.Point;
import java.util.Map;
import org.apache.struts2.util.StrutsTypeConverter;
public class MyPointConverter extends StrutsTypeConverter{
@Override
public Object convertFromString(Map context, String[] values, Class toClass) {
Point p = new Point();
String[] strs = (String[])values;
String[] xy = strs[0].split(",");
p.x = Integer.parseInt(xy[0]);
p.y = Integer.parseInt(xy[1]);
return p;
}
@Override
public String convertToString(Map context, Object o) {
// TODO Auto-generated method stub
return o.toString();
}
}
如果遇到不能转换的类型，就到属性文件里面去看有没有转换器
1. p（属性名称） = converter
ii. 全局：xwork-conversion.properties
1. com.xxx.XXX（类名）= converter
iii. Annotation
java.awt.Point=com.bjsxt.converter.MyPointConverter
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>Type Conversion</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>
name:<s:property value="name"/><br/>
age:<s:property value="age"/><br/>
date:<s:property value="d"/><br/>
<s:date name="d" format="yyyy/MM/dd HH:mm:ss"/><br/>
<s:property value="interests"/><br/>
<s:property value="users"/><br/>
<s:property value="p"/><br/>
<s:property value="ps"/><br/>
points:<s:property value="points"/><br/>
</body>
</html>