使用CORS实现JavaWeb跨域请求问题的方法_JAVA教程

使用CORS实现JavaWeb跨域请求问题的方法

2020-06-09 12:16java教程网 JAVA教程

这篇文章主要介绍了使用Cors实现JavaWeb跨域请求问题的方法，非常不错，具有参考借鉴价值，需要的朋友可以参考下

之前用jsonp 解决跨域问题，现在用CORS实现跨域请求解决java 跨域问题：

主要代码如下

				?

									package com.hy.fliter;

									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.apache.commons.httpclient.HttpStatus;

									/**

									* Created by WangShuai on 2016/7/30.

									*/

									public class CorsFilter implements Filter {

									@Override

									public void init(FilterConfig filterConfig) throws ServletException { }

									@Override

									public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

									HttpServletResponse response = (HttpServletResponse) servletResponse;

									HttpServletRequest request = (HttpServletRequest) servletRequest;

									// 指定允许其他域名访问

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

									// 响应类型

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

									// 响应头设置

									response.setHeader("Access-Control-Allow-Headers", "Content-Type, x-requested-with, X-Custom-Header, HaiYi-Access-Token");

									if ("OPTIONS".equals(request.getMethod())){

									response.setStatus(HttpStatus.SC_NO_CONTENT);

									}

									filterChain.doFilter(servletRequest, servletResponse);

									}

									@Override

									public void destroy() { }

									}

web.xml 代码如下配置

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									<filter>

									<filter-name>cors</filter-name>

									<filter-class>com.hy.fliter.CorsFilter</filter-class>

									</filter>

									<filter-mapping>

									<filter-name>cors</filter-name>

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

									</filter-mapping>