跨域請求，設(shè)置服務(wù)端請求的Origin，Access-Control-Allow-Origin，使用filter過濾器，對每次請求的這兩項數(shù)據(jù)進行設(shè)置。

對應(yīng)代碼 ，設(shè)置一個filter（當前類繼承自?implementsFilter）

?publicvoiddoFilter(ServletRequestreq, ServletResponseres, FilterChainchain)throwsIOException, ServletException {

?????????????? HttpServletResponseresponse= (HttpServletResponse)res;

?????????????? HttpServletRequestrequest= (HttpServletRequest)req;

?????????????? Stringorigin=request.getHeader("Origin");

??????????????response.setHeader("Access-Control-Allow-Origin",origin);

??????????????response.setHeader("Access-Control-Allow-Methods","POST, GET, OPTIONS, DELETE");

??????????????response.setHeader("Access-Control-Max-Age","3600");

??????????????response.setHeader("Access-Control-Allow-Headers","Content-Type,jsonRequest");//這里“Access-Token”是我要傳到后臺的內(nèi)容key?

??????????????response.setHeader("Access-Control-Allow-Credentials","true");

?????????????? Stringmethod=request.getMethod();

??????????????if(method.equalsIgnoreCase("OPTIONS")){

?????????????? ???????res.getOutputStream().write("Success".getBytes("utf-8"));

?????????????? }else{

?????????????? ???????chain.doFilter(req,res);

?????????? }

??????? }

? ? b、在項目的web問價下添加如下代碼

?? ?? ? 主要作用是注冊過濾器攔截請求

?? ??? ?<filter>

??????????<filter-name>corsFilter</filter-name>

??????????<filter-class>com.eifini.common.filter.CorsFilter</filter-class>

???????</filter>

???????<filter-mapping>

??????????<filter-name>corsFilter</filter-name>

??????????<url-pattern>/*</url-pattern>

???????</filter-mapping>