SpringMVC过滤器
2016-06-16 15:14
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http://blog.csdn.net/chenleixing/article/details/44573495
示例一:
package com.test.spring.filter;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.filter.OncePerRequestFilter;
/**
* 登录过滤
*
* @author geloin
* @date 2012-4-10 下午2:37:38
*/
public class SessionFilter extends OncePerRequestFilter {
/*
* (non-Javadoc)
*
* @see
* org.springframework.web.filter.OncePerRequestFilter#doFilterInternal(
* javax.servlet.http.HttpServletRequest,
* javax.servlet.http.HttpServletResponse, javax.servlet.FilterChain)
*/
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
// 不过滤的uri
String[] notFilter = new String[] { "login.html", "index.html" };
// 请求的uri
String uri = request.getRequestURI();
// uri中包含background时才进行过滤
if (uri.indexOf("background") != -1) {
// 是否过滤
boolean doFilter = true;
for (String s : notFilter) {
if (uri.indexOf(s) != -1) {
// 如果uri中包含不过滤的uri,则不进行过滤
doFilter = false;
break;
}
}
if (doFilter) {
// 执行过滤
// 从session中获取登录者实体
Object obj = request.getSession().getAttribute("loginedUser");
if (null == obj) {
// 如果session中不存在登录者实体,则弹出框提示重新登录
// 设置request和response的字符集,防止乱码
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
String loginPage = "....";
StringBuilder builder = new StringBuilder();
builder.append("<script type=\"text/javascript\">");
builder.append("alert('网页过期,请重新登录!');");
builder.append("window.top.location.href='");
builder.append(loginPage);
builder.append("';");
builder.append("</script>");
out.print(builder.toString());
} else {
// 如果session中存在登录者实体,则继续
filterChain.doFilter(request, response);
}
} else {
// 如果不执行过滤,则继续
filterChain.doFilter(request, response);
}
} else {
// 如果uri中不包含background,则继续
filterChain.doFilter(request, response);
}
}
}
写完过滤器后,需要在web.xml中进行配置:
<filter>
<filter-name>sessionFilter</filter-name>
<filter-class>com.test.spring.filter.SessionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>sessionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
示例二:
package com.ucenter.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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/*
* 登录过滤器,必须登录才能访问,否则全部转发到登录页面
*/
public class LoginFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
// 获得在下面代码中要用的request,response,session对象
HttpServletRequest servletRequest = (HttpServletRequest) request;
HttpServletResponse servletResponse = (HttpServletResponse) response;
HttpSession session = servletRequest.getSession();
// 获得用户请求的URI
String path = servletRequest.getRequestURI();
// 从session里去用户信息
Integer userID = (Integer) session.getAttribute("userID");
// 登陆页面无需过滤
if (path.indexOf("finduser") > -1 || path.indexOf("modifypwd") > -1 || path.indexOf("resetpwd") > -1
|| path.indexOf("regist") > -1 || path.indexOf("addlog") > -1 || path.indexOf("login") > -1
|| path.indexOf("css") > -1 | path.indexOf("font") > -1 || path.indexOf("js") > -1
|| path.indexOf("images") > -1) {
chain.doFilter(servletRequest, servletResponse);
return;
}
// 判断如果没有取到员工信息,就跳转到登陆页面
if (userID == null || "".equals(userID)) {
// 跳转到登陆页面
servletResponse.sendRedirect("login");
} else {
// 已经登陆,继续此次请求
chain.doFilter(request, response);
}
}
@Override
public void destroy() {
}
}
示例一:
package com.test.spring.filter;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.filter.OncePerRequestFilter;
/**
* 登录过滤
*
* @author geloin
* @date 2012-4-10 下午2:37:38
*/
public class SessionFilter extends OncePerRequestFilter {
/*
* (non-Javadoc)
*
* @see
* org.springframework.web.filter.OncePerRequestFilter#doFilterInternal(
* javax.servlet.http.HttpServletRequest,
* javax.servlet.http.HttpServletResponse, javax.servlet.FilterChain)
*/
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response, FilterChain filterChain)
throws ServletException, IOException {
// 不过滤的uri
String[] notFilter = new String[] { "login.html", "index.html" };
// 请求的uri
String uri = request.getRequestURI();
// uri中包含background时才进行过滤
if (uri.indexOf("background") != -1) {
// 是否过滤
boolean doFilter = true;
for (String s : notFilter) {
if (uri.indexOf(s) != -1) {
// 如果uri中包含不过滤的uri,则不进行过滤
doFilter = false;
break;
}
}
if (doFilter) {
// 执行过滤
// 从session中获取登录者实体
Object obj = request.getSession().getAttribute("loginedUser");
if (null == obj) {
// 如果session中不存在登录者实体,则弹出框提示重新登录
// 设置request和response的字符集,防止乱码
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
String loginPage = "....";
StringBuilder builder = new StringBuilder();
builder.append("<script type=\"text/javascript\">");
builder.append("alert('网页过期,请重新登录!');");
builder.append("window.top.location.href='");
builder.append(loginPage);
builder.append("';");
builder.append("</script>");
out.print(builder.toString());
} else {
// 如果session中存在登录者实体,则继续
filterChain.doFilter(request, response);
}
} else {
// 如果不执行过滤,则继续
filterChain.doFilter(request, response);
}
} else {
// 如果uri中不包含background,则继续
filterChain.doFilter(request, response);
}
}
}
写完过滤器后,需要在web.xml中进行配置:
<filter>
<filter-name>sessionFilter</filter-name>
<filter-class>com.test.spring.filter.SessionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>sessionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
示例二:
package com.ucenter.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.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/*
* 登录过滤器,必须登录才能访问,否则全部转发到登录页面
*/
public class LoginFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException {
// 获得在下面代码中要用的request,response,session对象
HttpServletRequest servletRequest = (HttpServletRequest) request;
HttpServletResponse servletResponse = (HttpServletResponse) response;
HttpSession session = servletRequest.getSession();
// 获得用户请求的URI
String path = servletRequest.getRequestURI();
// 从session里去用户信息
Integer userID = (Integer) session.getAttribute("userID");
// 登陆页面无需过滤
if (path.indexOf("finduser") > -1 || path.indexOf("modifypwd") > -1 || path.indexOf("resetpwd") > -1
|| path.indexOf("regist") > -1 || path.indexOf("addlog") > -1 || path.indexOf("login") > -1
|| path.indexOf("css") > -1 | path.indexOf("font") > -1 || path.indexOf("js") > -1
|| path.indexOf("images") > -1) {
chain.doFilter(servletRequest, servletResponse);
return;
}
// 判断如果没有取到员工信息,就跳转到登陆页面
if (userID == null || "".equals(userID)) {
// 跳转到登陆页面
servletResponse.sendRedirect("login");
} else {
// 已经登陆,继续此次请求
chain.doFilter(request, response);
}
}
@Override
public void destroy() {
}
}
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