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Struts2 访问Servlet API（ActionContext）以及校验框架

2017-07-02 10:19 363 查看

访问Servlet API

Action类：

package com.Actions;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport {
private  String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

public String fun3(){
if("admin".equals(this.username) &&"123".equals(this.password)){
ActionContext context=ActionContext.getContext();
if(null !=context.getSession().get("uName")){
String msg=this.username+": 你已经登录了";
System.out.println(msg);

}
else{
context.getSession().put("uName",username);
}
return SUCCESS;
}
else{
String msg="登陆错误，请检查用户名和密码";
System.out.println(msg);
return "error";
}

}

}

Struts2.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
<!--  <action name="index" class="com.Actions.HelloWorldAction">
<result>
/index2.jsp
</result>
</action>
<action name="name"  method="get" class="com.Actions.GetFormValuesAction">
<result name="get">
/index2.jsp
</result>
</action> -->
<action name="ServletAPI" method="fun3" class="com.Actions.LoginAction">
<result name="error">/index3.jsp</result>
<result >/index2.jsp</result>
</action>
</package>
</struts>

index3.jsp:

<form action="ServletAPI.action" method="post" >
<input type="text" name="username">
<input type="password" name="password">
<input type="submit" value="提交">
</form>

校验框架

Struts2两种校验方式

1.Action类：

package com.Actions;

import com.opensymphony.xwork2.ActionSupport;

public class LoginvalidateAction extends ActionSupport {

/**
*
*/
private static final long serialVersionUID = 1L;

private String username;
private String password;
private String FORWORD=null;

public String execute(){
return SUCCESS;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

}

2.在该Action相同目录下建一个xml文件，

命名为：ActionName-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//Apache Struts//XWork Validator 1.0.2//EN"
"http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">

<validators>
<field name="username">
<field-validator type="requiredstring">
<message key="username.empty"/>
</field-validator>
</field>

<field name="password">
<field-validator type="requiredstring">
<message key="密码不能为空"/>
</field-validator>
<field-validator type="stringlength">
<param name="minlength">6</param>
<param name="maxlength">12</param>
<message key="username.size"></message>
</field-validator>
</field>
</validators>

3.在Struts.xml文件中配置Action，视图一定是input

<action name="validate" class="com.Actions.LoginvalidateAction">
<result name="input">/loginvalidate.jsp</result>
</action>

添加一个loginvalidate.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>FirstStruts2</title>

</head>
<form action="ServletAPI.action" method="post" >
<s:fielderror/>
<input type="text" name="username">
<input type="password" name="password">
<input type="submit" value="提交">
</form>
<body>

</body>
</html>

4.运行url

http://localhost:8080/Struts2kuangjia/validate

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