angularjs做跨域遇到的一些问题

最近做angular跨域，发现很多问题，也搜索了很多方法都试过，还好最终都弄出来了，

首先jsonp 这个是可以做跨域的，但是只支持get请求，而且要固定返回callback，所以返回类型只能是String，测试可以，但是不考虑，

Nginx当然肯定是可以的，但是这不属于真正的跨域。

最后我直接在后台写了个filter 搞定。

直接上代码

package com.cdy.filter;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

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 net.sf.json.JSONArray;

public class SimpleCORSFilter implements Filter{  
  
    @Override  
    public void destroy() {  
          
    }  
  
    @Override  
    public void doFilter(ServletRequest req, ServletResponse res,  
            FilterChain chain) throws IOException, ServletException {  
          /*  HttpServletResponse response = (HttpServletResponse) res;  
            response.setHeader("Access-Control-Allow-Origin", "*");  // 授权的源控制
            response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  // 允许请求的HTTP Method
            response.setHeader("Access-Control-Max-Age", "3600");   // 授权的时间
            response.setHeader("Access-Control-Allow-Headers", "Origin, Accept, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers"); // 控制哪些header能发送真正的请求   
            response.setHeader("Access-Control-Allow-Credentials", "true");// 控制是否开启与Ajax的Cookie提交方式
            chain.doFilter(req, res);  */
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest)req;
        System.out.println("Origin:"+request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with, ws_auth_token");
        response.setHeader("Access-Control-Allow-Credentials","true"); //是否支持cookie跨域
        String token = request.getHeader("ws_auth_token");
        if(token==null){
        	token ="admin";
        }
        System.out.println(request.getMethod());
        try{
        	System.out.println(request.getSession().getId());
        	chain.doFilter(req, res);
        }catch(Exception e){
        	Map<String,Object> map = new HashMap<String,Object>();
    		map.put("code", "900");
    		map.put("message", e.getMessage());
    		//map.put("data", Utils.getErrorInfoFromException(e));
    		String msg = JSONArray.fromObject(map).toString();
        	PrintWriter out= response.getWriter();
    		out.write(msg);
    		out.flush();
    		out.close();
    		response.setStatus(900);
        }
          
    }  
  
    @Override  
    public void init(FilterConfig arg0) throws ServletException {  
          
    }  
  
} 

之前试了很多方法都不行，主要是这个过滤器设置有问题，参照这个一般不会有问题，问题解决了，特记录下。ps：这里面也可以制定网址访问