跨域失敗 過濾器_通過添加filter過濾器 徹底解決ajax 跨域問題

1、在web.xml添加filter

contextfilter

com.cf.hr.filter.WebContextFilter

contextfilter

/*

2、filter實作

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.HttpServletResponse;

public class WebContextFilter implements Filter {

@Override

public void destroy() {

// TODO Auto-generated method stub

}

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)

throws IOException, ServletException {

HttpServletResponse httpServletResponse = (HttpServletResponse) response;

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

httpServletResponse.setHeader("Access-Control-Allow-Headers", "accept,content-type");

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

chain.doFilter(request, httpServletResponse);

}

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

}

}

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