20171106_chr_downInterceptor 自定义拦截器实现下载前登陆拦截

自定义拦截器实现下载前登陆拦截

/20171106_chr_downInterce
4000
ptor/src/nuc/sw/action/DownloadAction.java

package nuc.sw.action;

import com.opensymphony.xwork2.ActionSupport;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

public class DownloadAction extends ActionSupport
{
private String inputPath;
private String contentType;
private String downFileName;

public String getContentType() {
return contentType;
}

public String getDownFileName() {
return downFileName;
}

public String getInputPath() {
return inputPath;
}

public void setContentType(String contentType) {
this.contentType = contentType;
}

public void setDownFileName(String downFileName) throws UnsupportedEncodingException {
this.downFileName = new String(downFileName.getBytes("iso8859-1"),"utf-8");
}

public void setInputPath(String inputPath) throws UnsupportedEncodingException {
this.inputPath = new String(inputPath.getBytes("iso8859-1"),"utf-8");
}
public InputStream getTargetFile() {

InputStream is = null;
try {
is = new FileInputStream(inputPath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return is;
}

}

/20171106_chr_downInterceptor/src/nuc/sw/action/LoginAction.java

package nuc.sw.action;

import java.util.regex.Pattern;

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

public class LoginAction extends ActionSupport {
//属性驱动校验
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;
}
//手动检验
@Override
public void validate() {
// TODO Auto-generated method stub
//进行数据校验，长度6~15位
if(username.trim().length()<6||username.trim().length()>15||username==null)
{
this.addFieldError("username", "用户名长度不合法！");
}
if(password.trim().length()<6||password.trim().length()>15||password==null)
{
this.addFieldError("password", "密码长度不合法！");
}
}
//登陆业务逻辑
public String loginMethod() {
if(username.equals("chenghaoran")&&password.equals("12345678")) {
ActionContext.getContext().getSession().put("user", username);
return "loginOK";
}else {
this.addFieldError("err","用户名或密码不正确！");
return "loginFail";
}
}
//手动校验validateXxx
public void validateLoginMethod() {
//使用正则校验
if(username==null||username.trim().equals("")) {
this.addFieldError("username","用户名不能为空！");
}else {
if(!Pattern.matches("[a-zA-Z]{6,15}", username.trim())) {
this.addFieldError("username", "用户名格式错误！");
}
}
if(password==null||password.trim().equals("")) {
this.addFieldError("password","密码不能为空！");
}else {
if(!Pattern.matches("\\d{6,15}", password.trim())) {
this.addFieldError("password", "密码格式错误！");
}
}
}
}

/20171106_chr_downInterceptor/src/nuc/sw/interceptor/LoginInterceptor.java

package nuc.sw.interceptor;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class LoginInterceptor extends AbstractInterceptor {

@Override
public String intercept(ActionInvocation arg0) throws Exception {
// TODO Auto-generated method stub
//判断是否登陆，通过ActionContext访问Session
ActionContext ac=arg0.getInvocationContext();
String username=(String)ac.getSession().get("user");
if(username!=null&&username.equals("chenghaoran")) {
return arg0.invoke();//放行
}else {
((ActionSupport)arg0.getAction()).addActionError("请先登录！");
return Action.LOGIN;
}
}

}

/20171106_chr_downInterceptor/src/struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
<package extends="struts-default" namespace="/" name="download">
<interceptors>
<interceptor name="login" class="nuc.sw.interceptor.LoginInterceptor"></interceptor>
</interceptors>
<action name="download" class="nuc.sw.action.DownloadAction">
<interceptor-ref name="login"></interceptor-ref>
<interceptor-ref name="defaultStack"></interceptor-ref>
<result name="login">
/login.jsp
</result>
<result type="stream">
<param name="contentType">${contentType}</param>
<param name="inputName">targetFile</param>
<param name="contentDisposition">attachment;filename${downFileName}</param>
</result>
</action>
<action name="loginAction" class="nuc.sw.action.LoginAction" method="loginMethod">
<result name="loginOK">
/download.jsp
</result>
<result name="loginFail">
/login.jsp
</result>
<result name="input">
/login.jsp
</result>
</action>
</package>
</struts>

/20171106_chr_downInterceptor/WebContent/download.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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&
ab3a
gt;下载页</title>
</head>
<body>
<a href="download?inputPath=f:/123.txt&contentType=text/plain&downFileName=123.txt">struts2下载文件</a>
</body>
</html>

/20171106_chr_downInterceptor/WebContent/login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>登录页</title>
<s:head/>
</head>
<body>
<s:actionerror/>
<s:fielderror fieldName="err"></s:fielderror>
<s:form action="loginAction" method="post">
<s:textfield label="用户名" name="username"></s:textfield>
<s:password label="密码" name="password"></s:password>
<s:submit value="登陆"></s:submit>
</s:form>
</body>
</html>