java解决前后台跨域问题

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

<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>