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struts2对action中的方法进行输入校验(2)

struts2输入校验流程:

1.类型转换器对请求参数执行类型转换,并把转换后的值赋给aciton中的属性

2.如果在执行类型转换的过程中出现异常,系统会将异常信息保存到ActionContext,

conversionError拦截器将异常信息添加到fieldErrors里,不管类型转换是否出现异常,都会进入第三步

3.系统通过反射技术先调用action的validateXXX方法

4.再调用aciton中的validate方法

5.经过上述的4步,如果系统中的fieldErrors存在错误信息,系统自动将请求转发至名称为input的视图

如果系统中的fieldErrors没有任何错误信息,系统将执行aciton中的处理方法。


也就是说转发至input视图有两个原因:1.类型转换异常

2.输入校验不合法


如下:

InvidateAction.java:

package com.itheima.action;

import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class InvidateAction extends ActionSupport{

	private String username;
	private String tel;
	private Date birthday;
	private String msg;
	public void setUsername(String username) {
		this.username = username;
	}
	public void setTel(String tel) {
		this.tel = tel;
	}
	
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getMsg() {
		return msg;
	}
	public void validate() {
		
	}
	public String execute1() {
		msg = "execute1";
		return "success";
	}
	public String execute2() {
		msg = "execute2";
		return "success";
	}
}

person.jsp:

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
	<s:fielderror/>
	<form action="${pageContext.request.contextPath }/invidateAction_execute1.action" method="post">
		用户名:<input type="text" name="username"><br>
		手机号:<input type="text" name="tel"><br>
		生日:<input type="text" name="birthday"><br>
		<input type="submit" value=http://www.mamicode.com/"提交">>struts2.xml

<action name="invidateAction_*" class="com.itheima.action.InvidateAction" method="{1}">
	<result name="success">/success.jsp</result>
	<result name="input">/person.jsp</result>
</action>


我在jsp中输入信息如下:

则会提示:

======================================================================================================

解决以上问题可以通过创建Action的类型转换器:

类型转换器教程参见:http://blog.csdn.net/m631521383/article/details/40680723

InvidateAction.java:

package com.itheima.action;

import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class InvidateAction extends ActionSupport{

	private String username;
	private String tel;
	private Date birthday;
	private String msg;
	public void setUsername(String username) {
		this.username = username;
	}
	public void setTel(String tel) {
		this.tel = tel;
	}
	
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public String getMsg() {
		return msg;
	}
	public void validate() {
		
	}
	public String execute1() {
		msg = "execute1";
		return "success";
	}
	public String execute2() {
		msg = "execute2";
		return "success";
	}
}

DateTypeConverter.java:

package com.itheima.converter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter;

public class DateTypeConverter extends DefaultTypeConverter{

	@Override
	public Object convertValue(Map<String, Object> context, Object value,
			Class toType) {
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmdd");
		if(toType == Date.class) {
			String[] strs = (String[])value;
			Date date = null;
			try {
				date = dateFormat.parse(strs[0]);
			} catch (ParseException e) {
				e.printStackTrace();
				throw new RuntimeException(e);
			}
			return date;
		} else if(toType == String.class) {
			return dateFormat.format((Date)value);
		}
		
		return null;
	}

	
}
InvidateAction-conversion.properties:

birthday=com.itheima.converter.DateTypeConverter

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struts2对action中的方法进行输入校验(2)