Java设置接口跨域
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现在我们很多项目都是基于Java的REST结构风格前后端分离,在前端访问后端的时候就存在跨域,这个时候后端接口不处理就会存在访问不了。上代码!
1、创建一个Filter 在web.xml中配置
<filter> <filter-name>xssAndSqlFilter</filter-name> <filter-class>com.tzdr.btc.user.filter.XssAndSqlFilter</filter-class> <!--过滤掉 静态资源文件 指定字符串 多个值用英文逗号隔开--> <init-param> <param-name>excludedPages</param-name> <param-value>/tesra/</param-value> </init-param> </filter> <filter-mapping> <filter-name>xssAndSqlFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
2、在Filter的doFiler方法中添加设置
@Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { boolean isExcludedPage = Boolean.TRUE; HttpServletResponse httpResponse = (HttpServletResponse) response; HttpServletRequest request1 = (HttpServletRequest) request; //*表示允许所有域名跨域 httpResponse.setHeader("Access-Control-Allow-Origin", request1.getHeader("Origin")); httpResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE"); httpResponse.setHeader("Access-Control-Max-Age", "0"); httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token,Access-Control-Allow-Headers"); httpResponse.setHeader("Access-Control-Allow-Credentials", "true");//这个是设置运行携带cookie httpResponse.setHeader("XDomainRequestAllowed","1"); //判断是否在过滤url之外 for (String page : excludedPageArray) { if(((HttpServletRequest) request).getServletPath().contains(page)){ isExcludedPage = Boolean.FALSE; break; } } //在过滤url之外 if (isExcludedPage) { XssAndSqlHttpServletRequestWrapper xssRequest = new XssAndSqlHttpServletRequestWrapper((HttpServletRequest) request); chain.doFilter(xssRequest, response); } else{ chain.doFilter(request, response); } }
这样完成以后 再访问接口就能成功访问了。
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