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©Copyright 蕃薯耀 2020-01-10
https://www.cnblogs.com/fanshuyao/
一、Java权限过滤器，如登录过滤
增加了配置文件，配置不拦截的请求，可以自定义不拦截的规则，有三种：
1、不拦截包含/service/的请求（*/service/*）
2、不拦截以aaa/bbb/开头的请求（aaa/bbb/*）
3、不拦截以/ccc/aa.action结尾的请求（*/ccc/aa.action）
过滤器代码如下：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set; 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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory; public class SessionFilter implements Filter {
protected final Log logger = LogFactory.getLog(SessionFilter.class);
private Set<String> unFilterSet = new HashSet<String>(); @Override
public void init(FilterConfig config) throws ServletException {
InputStream in = null;
BufferedReader reader = null;
try {
in = SessionFilter.class.getClassLoader().getResourceAsStream("sessionUnFilter.properties");
if(in != null){
reader = new BufferedReader(new InputStreamReader(in));
String lineText = null;
logger.info("=====不拦截的匹配规则有：");
while((lineText = reader.readLine()) != null){
if(!StringUtils.isBlank(lineText) && (!lineText.trim().startsWith("#"))){//过滤掉空行和注释行
logger.info("=====" + lineText);
unFilterSet.add(lineText);
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally{
if(reader != null){
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(in != null){
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} logger.info("SessionFilter init()");
} @Override
public void destroy() {
logger.info("SessionFilter destroy()");
} /**
* 如果请求链接符合不拦截的匹配，返回true
* @param unFilterSet
* @param requestURI
* @return
*/
public boolean isPass(Set<String> unFilterSet, String requestURI){
logger.info("=====requestURI = "+requestURI);
if(unFilterSet != null && unFilterSet.size() > 0){
for (String unFilterUri : unFilterSet) {
if(!StringUtils.isBlank(unFilterUri)){
unFilterUri = unFilterUri.trim();
if(unFilterUri.equals(requestURI)){
return true;
}else if(unFilterUri.startsWith("*") && unFilterUri.length() > 1 && unFilterUri.endsWith("*")){
String text = unFilterUri.substring(1, (unFilterUri.length() - 1));
//logger.info("=====contains text = " + text);
if(requestURI.contains(text)){
return true;
}
}else if(unFilterUri.startsWith("*") && !unFilterUri.endsWith("*")){
String text = unFilterUri.substring(1, (unFilterUri.length()));
//logger.info("=====endsWith text = " + text);
if(requestURI.endsWith(text)){
return true;
}
}else if(!unFilterUri.startsWith("*") && unFilterUri.endsWith("*")){
String text = unFilterUri.substring(0, (unFilterUri.length() - 1));
//logger.info("=====startsWith text = " + text);
if(requestURI.startsWith(text)){
return true;
}
}
}
}
}
return false;
} @Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain chain) throws IOException, ServletException { HttpServletRequest req = (HttpServletRequest) servletRequest;
HttpServletResponse res = (HttpServletResponse) servletResponse; boolean isAjaxRequest = false;//判断是否Ajax请求
if(!StringUtils.isBlank(req.getHeader("x-requested-with")) && req.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")){
isAjaxRequest = true;
}
UserInfo userInfo = null;
try {
userInfo = SecurityExtApi.getUserInfo(req);
} catch (GeneralFailureException e) {
e.printStackTrace();
}
if(userInfo != null && !StringUtils.isBlank(userInfo.getUserID())){
chain.doFilter(req, res);
}else{
String requestURI = req.getRequestURI();
//logger.info("=====requestURI = "+requestURI);
if(requestURI.endsWith(".js") || requestURI.endsWith(".css") || requestURI.endsWith(".png")
|| requestURI.endsWith(".jpg") || requestURI.endsWith(".jpeg") || requestURI.endsWith(".gif")
|| requestURI.endsWith(".ico")){
chain.doFilter(req, res);
return;
}else if(isPass(unFilterSet, requestURI)){
chain.doFilter(req, res);
return;
}else{
String msg = "登录已失效，请刷新页面或重新登录";
logger.info("=====" + msg);
if(isAjaxRequest){//Ajax请求结果处理
res.setContentType("application/json;charset=GBK");
res.setCharacterEncoding("GBK");
res.setHeader("error_code", "-999");
res.setHeader("error_msg", "The login is timeout, please login again!");
throw new RuntimeException(msg);//需要增加Ajax异常处理js全局配置文件ajax.config.js
}else{
res.sendRedirect("/");
}
}
}
}
}
不拦截请求配置文件（sessionUnFilter.properties）如下：
#配置说明：
#*/services/* ：不拦截包含/services/路径的
#/aa/startwith/* ：不拦截以/aa/startwith/开头的
#*/endwith/end.jsp ：不拦截以/endwith/end.jsp结尾的 /pro_name/aaa/login_local.jsp
/pro_name/bbb/ccc.action
*/services/*
Ajax请求处理需要增加一个js的全局处理配置文件
$(document).ajaxError(function(event,XHR){
var error_code = XHR.getResponseHeader("error_code");
var error_msg = XHR.getResponseHeader("error_msg");
if(error_code != null && error_code != undefined){
if("-999" == error_code){
error_msg = "异常信息：登录已失效，请重新登录或刷新页面";
}else{
error_msg = "异常信息："+ error_msg;
}
error_code = "异常代码："+error_code;
var error_tip = error_code +"<p>" + error_msg;
top.$.messager.alert('异常提示：',error_tip,'error');
}
});
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©Copyright 蕃薯耀 2020-01-10