Java中通过方法创建一个http连接并请求(服务器间进行通信)

packagedemo2.x.com;
importjava.io.BufferedReader;
importjava.io.InputStream;
importjava.io.InputStreamReader;
importjava.net.HttpURLConnection;
importjava.net.URL;
importjavax.print.attribute.standard.RequestingUserName;
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServletRequest;
importorg.apache.struts2.ServletActionContext;
importcom.opensymphony.xwork2.ActionSupport;
/**
 * Demo2主页，访问主页要先验证cookie
 * 
 * @author: qlq
 * @date : 2017年8月29日下午12:02:31
 */
public class Demo2Action extendsActionSupport {
    privateString gotoUrl;
    publicString getGotoUrl() {
        returngotoUrl;
    }
    public voidsetGotoUrl(String gotoUrl) {
        this.gotoUrl =gotoUrl;
    }
    @Override
    public String execute() throwsException {
        HttpServletRequest request =ServletActionContext.getRequest();
        Cookie cookies[] =request.getCookies();
        if (cookies != null) {
            for(Cookie cookie : cookies) {
                if ("ssocookie".equals(cookie.getName())) {
                    String result = this.doGet("http://check.x.com:8080/sso/checkCookie.action", cookie.getName(),
                            cookie.getValue());
                    if ("1".equals(result)) {
                        returnSUCCESS;
                    }
                }
            }
        }
        //登陆失败后将gotoUrl写到JSP页面
        gotoUrl = "http://demo2.x.com:8080/demo2/main.action";
        returnLOGIN;
    }
    publicString doGet(String url, String cookieName, String cookieValue) {
        //用于接收返回的数据
        StringBuffer sb = newStringBuffer();
        //创建一个连接的请求
        HttpURLConnection httpURLConnection = null;
        try{
            //包装请求的地址
            URL urls = new URL(url + "?cookieName=" + cookieName + "&cookieValue=" +cookieValue);
            //打开连接
            httpURLConnection =(HttpURLConnection) urls.openConnection();
            httpURLConnection.setRequestMethod("GET");
            //通过BufferReader读取数据
            InputStream iStream =httpURLConnection.getInputStream();
            InputStreamReader inputStreamReader = newInputStreamReader(iStream);
            BufferedReader bReader = newBufferedReader(inputStreamReader);
            String temp = null;
            while ((temp = bReader.readLine()) != null) {
                sb.append(temp);
            }
            //关闭流(先开后关，后开先关)
bReader.close();
            inputStreamReader.close();
            iStream.close();
        } catch(Exception e) {
            e.printStackTrace();
        } finally{
            if (httpURLConnection != null) {
                //关闭连接
httpURLConnection.disconnect();
            }
        }
        returnsb.toString();
    }
}

packagecheck.x.com;
importjava.awt.image.VolatileImage;
importjava.io.IOException;
importjavax.servlet.http.Cookie;
importjavax.servlet.http.HttpServletResponse;
importorg.apache.struts2.ServletActionContext;
importcom.opensymphony.xwork2.ActionSupport;
importcom.sun.org.apache.bcel.internal.generic.IF_ACMPEQ;
importcheck.x.com.utils.CheckCookie;
public class LoginAction extendsActionSupport {
    privateString username;
    privateString password;
    privateString gotoUrl;
    privateString cookieName;
    privateString cookieValue;
    publicString getCookieName() {
        returncookieName;
    }
    public voidsetCookieName(String cookieName) {
        this.cookieName =cookieName;
    }
    publicString getCookieValue() {
        returncookieValue;
    }
    public voidsetCookieValue(String cookieValue) {
        this.cookieValue =cookieValue;
    }
    publicString getGotoUrl() {
        returngotoUrl;
    }
    public voidsetGotoUrl(String gotoUrl) {
        this.gotoUrl =gotoUrl;
    }
    publicString getUsername() {
        returnusername;
    }
    public voidsetUsername(String username) {
        this.username =username;
    }
    publicString getPassword() {
        returnpassword;
    }
    public voidsetPassword(String password) {
        this.password =password;
    }
    @Override
    public String execute() throwsException {
        boolean OK = this.check();
        if(OK) {
            Cookie cookie = new Cookie("ssocookie", "sso");
            //设置cookie的作用范围是父域(.x.com)
            cookie.setDomain(".x.com");
            //斜杠代表设置到父域的顶层，也就是父域下的所有应用都可访问
            cookie.setPath("/");
            HttpServletResponse response =ServletActionContext.getResponse();
            //增加cookie，未设置生命周期默认为一次会话
response.addCookie(cookie);
            returnSUCCESS;
        }
        return null;
    }
    public void checkCookie() throwsIOException{
        String result="0";
        if(CheckCookie.checkCookie(cookieName, cookieValue)){
            result="1";
        }
        HttpServletResponse response =ServletActionContext.getResponse();
        response.getWriter().print(result);
        response.getWriter().close();
    }
    public booleancheck() {
        if ("user".equals(username) && "123".equals(password))
            return true;
        return false;
    }
}