spring security3.1升级到4.1问题（1）访问/j_spring_security_check 404

升级完后，发现登录不进去，把post改成get好了，但是系统的提交表单功能都不能用了，也是解决了很长时间，最后找到了根本原因。

解决方法一：加入<csrf disabled="true" />配置

解决方法二：不过滤指定的url

自己弄一个Matcher

 1 package com.cnblogs.yjmyzz.utils;
 2 
 3 import java.util.List;
 4 import java.util.regex.Pattern;
 5 
 6 import javax.servlet.http.HttpServletRequest;
 7 
 8 import org.springframework.security.web.util.matcher.RequestMatcher;
 9 
10 public class CsrfSecurityRequestMatcher implements RequestMatcher {
11     private Pattern allowedMethods = Pattern12             .compile("^(GET|HEAD|TRACE|OPTIONS)$");
13 
14     public boolean matches(HttpServletRequest request) {
15 
16         if (execludeUrls != null && execludeUrls.size() > 0) {
17             String servletPath = request.getServletPath();
18             for (String url : execludeUrls) {
19                 if (servletPath.contains(url)) {
20                     return false;
21                 }
22             }
23         }
24         return !allowedMethods.matcher(request.getMethod()).matches();
25     }

26 
27     /**
28      * 需要排除的url列表
29      */
30     private List<String> execludeUrls;

31 
32     public List<String> getExecludeUrls() {
33         return execludeUrls;
34     }

35 
36     public void setExecludeUrls(List<String> execludeUrls) {
37         this.execludeUrls = execludeUrls;
38     }
39 }

这里添加了一个属性execludeUrls，允许人为排除哪些url。

然后在配置文件里，这样修改：

 1     <http entry-point-ref="loginEntryPoint" use-expressions="true">

 2         ...
 3         <intercept-url pattern="/rest/**" access="permitAll" />

 4         ...
 5         <csrf request-matcher-ref="csrfSecurityRequestMatcher"/> 
 6     </http>

 7     
 8     <beans:bean id="csrfSecurityRequestMatcher" class="com.cnblogs.yjmyzz.utils.CsrfSecurityRequestMatcher">
 9         <beans:property name="execludeUrls">
10             <beans:list>
11                 <beans:value>/rest/</beans:value>
12             </beans:list>
13         </beans:property>
14     </beans:bean>

这里约定所有/rest/开头的都是Rest服务地址，上面的配置就把/rest/排除在csrf验证的范围之外了.

解决方法三：加入csrf的token

参考http://docs.spring.io/spring-security/site/docs/current/reference/htmlsingle/#csrf-logout