Java|java教程
Cors，java，完全跨域
Java-java教程
本篇文章主要介绍了Cors实现java后端完全跨域实例，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧
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/article/114838.htm这篇文章很详细的介绍了JS的跨域，给出的解决方案是springboot的方式，假如不用spring boot 或者 spring版本低于4.2就需要自己实现；
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参考了spring boot的实现方式，并有所简化，代码如下：
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package com.lvluo.web.filter.CorsFilter;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 org.springframework.http.HttpHeaders;public class CorsFilter implements Filter { public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method"; public static final String OPTIONS = "OPTIONS"; public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; if (isCorsRequest(httpRequest)) { httpResponse.setHeader("Access-Control-Allow-Origin", "*"); httpResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE"); httpResponse.setHeader("Access-Control-Allow-Credentials", "true"); // response.setIntHeader("Access-Control-Max-Age", 1728000); httpResponse .setHeader( "Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Accept-Encoding, Authorization"); if (isPreFlightRequest(httpRequest)) { return; } } chain.doFilter(request, response); } public void init(FilterConfig filterConfig) { } public void destroy() { } public boolean isCorsRequest(HttpServletRequest request) { return (request.getHeader(HttpHeaders.ORIGIN) != null); } /** * Returns {@code true} if the request is a valid CORS pre-flight one. */ public boolean isPreFlightRequest(HttpServletRequest request) { return (isCorsRequest(request) && OPTIONS.equals(request.getMethod()) && request .getHeader(ACCESS_CONTROL_REQUEST_METHOD) != null); }}
接着在web.xml配置filter即可
corsFilter com.lvluo.web.filter.CorsFilter corsFilter /api/*
前端测试的JS代码，其中客户端的
$.ajax({ headers : { Authorization :Bearer iBoxSO9QdrHR0 }, url: http://localhost:8080/service/api/ping, type: GET, dataType: json, success : function(result){ $("#result").html(result.code); } })
