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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:
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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)
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