Filter_编码过滤，登录过滤，权限过滤
2024-06-21 15:46:31
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"><display-name>scm</display-name><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list><!-- 编码过滤器注册 --><filter><filter-name>encode</filter-name><filter-class>com.scm.filter.EncodeFilter</filter-class><!-- 配置初始化信息 --><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param></filter><!-- 登录过滤器注册 --><filter><filter-name>login</filter-name><filter-class>com.scm.filter.LoginFilter</filter-class></filter><!-- 权限过滤器注册配置 --><filter><filter-name>auth</filter-name><filter-class>com.scm.filter.AuthFilter</filter-class></filter><!-- 编码过滤器 --><filter-mapping><filter-name>encode</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- 登录过滤器：过滤具体部门 --><filter-mapping><filter-name>login</filter-name><url-pattern>/system/*</url-pattern></filter-mapping><filter-mapping><filter-name>login</filter-name><url-pattern>/purchase/*</url-pattern></filter-mapping><filter-mapping><filter-name>login</filter-name><url-pattern>/warehouse/*</url-pattern></filter-mapping><filter-mapping><filter-name>login</filter-name><url-pattern>/finance/*</url-pattern></filter-mapping><filter-mapping><filter-name>login</filter-name><url-pattern>/sale/*</url-pattern></filter-mapping><filter-mapping><filter-name>login</filter-name><url-pattern>/system/*</url-pattern></filter-mapping><!-- 权限过滤器：过滤具体部门 --><filter-mapping><filter-name>auth</filter-name><url-pattern>/system/*</url-pattern></filter-mapping><filter-mapping><filter-name>auth</filter-name><url-pattern>/purchase/*</url-pattern></filter-mapping><filter-mapping><filter-name>auth</filter-name><url-pattern>/warehouse/*</url-pattern></filter-mapping><filter-mapping><filter-name>auth</filter-name><url-pattern>/finance/*</url-pattern></filter-mapping><filter-mapping><filter-name>auth</filter-name><url-pattern>/sale/*</url-pattern></filter-mapping><filter-mapping><filter-name>auth</filter-name><url-pattern>/system/*</url-pattern></filter-mapping>
</web-app>
EncodeFilter
package com.scm.filter;import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;/*** Servlet Filter implementation class EncodeFilter*/
@WebFilter("/EncodeFilter")
public class EncodeFilter implements Filter {String encode;/*** Default constructor. */public EncodeFilter() {// TODO Auto-generated constructor stub}/*** @see Filter#destroy()*/public void destroy() {// TODO Auto-generated method stub}/*** @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)*/public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {request.setCharacterEncoding(encode);response.setCharacterEncoding(encode);chain.doFilter(request, response);}/*** @see Filter#init(FilterConfig)*/public void init(FilterConfig fConfig) throws ServletException {Filter.super.init(fConfig);encode=fConfig.getInitParameter("encoding");}}LoginFilter
package com.scm.filter;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;/*** Servlet Filter implementation class LoginFilter*/
@WebFilter("/LoginFilter")
public class LoginFilter implements Filter {/*** Default constructor. */public LoginFilter() {// TODO Auto-generated constructor stub}/*** @see Filter#destroy()*/public void destroy() {// TODO Auto-generated method stub}/*** @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)*/public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {HttpServletRequest req=(HttpServletRequest)request;Object obj = req.getSession().getAttribute("user");if(obj==null) {//未登录response.setContentType("text/html;charset=utf-8");response.getWriter().println("<script language=\"javascript\">alert(\"您还没有登录，请先登录!\");"+ "if(window.opener==null){window.top.location.href=\"../login.jsp\";}"+ "else{window.opener.top.location.href=\"../login.jsp\";window.close();}</script>"); response.getWriter().flush();response.getWriter().close();}else {//登录chain.doFilter(request, response);}}/*** @see Filter#init(FilterConfig)*/public void init(FilterConfig fConfig) throws ServletException {// TODO Auto-generated method stub}
}AuthFilter
package com.scm.filter;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;import com.scm.model.User;
import com.scm.service.AuthService;/*** Servlet Filter implementation class AuthFilter*/
@WebFilter("/AuthFilter")
public class AuthFilter implements Filter {/*** Default constructor. */public AuthFilter() {// TODO Auto-generated constructor stub}/*** @see Filter#destroy()*/public void destroy() {// TODO Auto-generated method stub}/*** @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)*/public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {HttpServletRequest req=(HttpServletRequest) request;String path=req.getServletPath();User user=(User) req.getSession().getAttribute("user");boolean flag=new AuthService().authCheck(path, user.getModelUri());if(flag) {chain.doFilter(request, response);}else {response.getWriter().println("<script language=\"javascript\">alert(\"您还没有权限！\");</script>");response.getWriter().flush();response.getWriter().close();}}/*** @see Filter#init(FilterConfig)*/public void init(FilterConfig fConfig) throws ServletException {// TODO Auto-generated method stub}
}package com.scm.service;import java.util.ArrayList;public class AuthService {/*** 根据servlet路径和user modeluri判断其是否具有权限* @param path* @param modelUri* @return*/public boolean authCheck(String path,ArrayList<String> modelUri) {for(String s:modelUri) {if(path.startsWith(s)) {return true;}}return false;}
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