获取微信号的工具类

我就是我 2022-01-23 11:07 164阅读 0赞

package cn.itsource.wechat.controller;
    
    import java.io.IOException;
    import java.net.URLEncoder;
    
    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.annotation.WebFilter;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import cn.itsource.wechat.util.HttpClientUtils;
    import cn.itsource.wechat.util.WeixinUtils;
    import com.alibaba.fastjson.JSONObject;
    
    @WebFilter("/*")
    public class WeixinAuthFilter implements Filter {
    	@Override
    	public void init(FilterConfig filterConfig) throws ServletException {
    
    	}
    
    	@Override
    	public void doFilter(ServletRequest request, ServletResponse response,
    			FilterChain chain) throws IOException, ServletException {
            HttpServletRequest hRequest = (HttpServletRequest) request;
            HttpServletResponse hResponse = (HttpServletResponse) response;
    
            //如果session中已经存在微信号了，就不用获取了，否则要获取，获取到以后要存放sesion
            String openId = (String) hRequest.getSession().getAttribute("openId");
            if (openId == null)
            {
                String agent = hRequest.getHeader("User-Agent");
            	  //只有在微信端才做里面的操作
                if (agent != null && agent.toLowerCase().indexOf("micromessenger") >= 0)
                {
                    String code = request.getParameter("code");
                    String state = request.getParameter("state");
                    //如果code不为空，scope为base,scope为userInfo代表用户已经同意
                    if (code != null && state != null && state.equals("1"))
                    {
                    	System.out.println("1111111111111");
                        // 通过Code获取openid来进行授权
                        String url =  WeixinUtils.AUTH_GET_OID.replace("APPID", WeixinUtils.APPID)
                        		.replace("SECRET", WeixinUtils.SECRET)
                        		.replace("CODE", code);
                        String json = HttpClientUtils.httpGet(url);
                        String openid = JSONObject.parseObject(json).getString("openid");
                        hRequest.getSession().setAttribute("openId", openid);
                        System.out.println(openid+"jjjjjjjjjjjjjjj");
                    }
                    else
                    {
                    	System.out.println("2222222222222222");
                    	  //发送用户同意的请求
                        String path = hRequest.getRequestURL().toString();
                        String query = hRequest.getQueryString();
                        if (query != null)
                        {
                            path = path + "?" + query;
                        }
                        System.out.println(path);
                        String uri = WeixinUtils.AUTH_URL.replace("APPID", WeixinUtils.APPID)
                        		.replace("REDIRECT_URI", URLEncoder.encode(path, "UTF-8"))
                                .replace("SCOPE", "snsapi_userinfo").replace("STATE", "1");
                        hResponse.sendRedirect(uri);
                        return;
                    }
                }
            }
            chain.doFilter(hRequest, hResponse);
        }
    
    	@Override
    	public void destroy() {
    
    	}
    
    }