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

<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>

以上所述是小编给大家介绍的使用CORS实现JavaWeb跨域请求问题的方法，希望对大家有所帮助，如果大家有任何疑问请给我们留言，小编会及时回复大家的。在此也非常感谢大家对查字典教程网的支持！