20171108_chr_newdownInterceptor 拦截器改进

拦截器改进

• /20171108_chr_newdownInterceptor/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;    }}

• /20171108_chr_newdownInterceptor/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！");            }        }    }}

• /20171108_chr_newdownInterceptor/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;        }    }}

• /20171108_chr_newdownInterceptor/src/nuc/sw/interceptor/LogInterceptor.java

package nuc.sw.interceptor;import java.util.Date;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;public class LogInterceptor extends AbstractInterceptor {    //给拦截器起个名字    private String name;    public void setName(String name) {        this.name = name;    }    @Override    public String intercept(ActionInvocation arg0) throws Exception {        // TODO Auto-generated method stub        //获得被拦截的Action名字        String actionName=arg0.getAction().getClass().getName();        //获得被代理的方法        String methodName=arg0.getProxy().getMethod();        //记录一下马上放行前的时间        System.out.println(name+"准备要开始访问"+actionName+"的方法"+methodName+"!时间:"+new Date());        long start=System.currentTimeMillis();        long end=System.currentTimeMillis();        //放行        String result=arg0.invoke();        System.out.println(name+"访问完"+actionName+"的方法"+methodName+"!时间:"+new Date());        System.out.println("执行"+actionName+"的方法"+methodName+"共花费的时间是:"+(start-end)+"毫秒!");        return result;    }}

• /20171108_chr_newdownInterceptor/src/struts.xml

<struts> <package extends="struts-default" namespace="/" name="download">  <interceptors>   <interceptor name="login" class="nuc.sw.interceptor.LoginInterceptor"></interceptor>   <interceptor name="log" class="nuc.sw.interceptor.LogInterceptor">    <param name="name">日志拦截器</param>   </interceptor>  </interceptors>  <action name="download" class="nuc.sw.action.DownloadAction">   <interceptor-ref name="login"></interceptor-ref>   <interceptor-ref name="defaultStack"></interceptor-ref>   <interceptor-ref name="log">    <param name="name">日志拦截器1</param>    <param name="name">日志拦截器2</param>   </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>

• /20171108_chr_newdownInterceptor/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>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>

• /20171108_chr_newdownInterceptor/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>