[android]-如何在向服务器发送request时附加已保存的cookie数据

应用场景:
在开发android基于手机端+服务器端的应用时,登陆->获取用户信息->获取授权用户相关业务数据(如用户工作任务安排)
,此时就涉及到在登陆后必须把保存有用户已登陆的cookie数据(和服务器端使用cookie或session来判断用户是否登陆没关系,因为这两种方式,在客户端来说,都是通过保存cookie数据来实现的)一同发送到服务器端,不然,服务器端会认为你没有登陆,而不给提供用户工作任务安排的数据

我在工作中就遇到过这问题

一开始我是这样书写代码的

  
    01
    import java.io.IOException;

    02
    import java.net.SocketTimeoutException;

    03
    import java.util.ArrayList;

    04
    import java.util.List;

    05
    import org.apache.http.HttpResponse;

    06
    import org.apache.http.NameValuePair;

    07
    import org.apache.http.client.methods.HttpPost;

    08
    import org.apache.http.impl.client.AbstractHttpClient;

    09
    import org.apache.http.impl.client.DefaultHttpClient;

    10
     
    11
     
    12
    String result = "";

    13
    /* HTTP Post */

    14
    HttpPost httpRequest = new HttpPost(url);

    15
     
    16
    List<NameValuePair> params = new ArrayList<NameValuePair>();

    17
    params.add(new BasicNameValuePair(para, data));// jsonParameter

    18
     
    19
    try {

    20
        // HTTP request

    21
        httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

    22
        // HTTP response

    23
     
    24
        DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

    25
        // 请求超时

    26
        defaultHttpClient.getParams().setParameter(

    27
                CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

    28
        // 读取超时

    29
        defaultHttpClient.getParams().setParameter(

    30
                CoreConnectionPNames.SO_TIMEOUT, 10000);

    31
                 
    32
     
    33
        // 发送请求

    34
        HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

    35
     
    36
        // 得到应答的字符串

    37
        // 200 ok

    38
        if (httpResponse.getStatusLine().getStatusCode() == 200) {

    39
            result = EntityUtils.toString(httpResponse.getEntity());

    40
             
    41
        }

    42
    } catch (ClientProtocolException e) {

    43
        System.out.println("ClientProtocolException:" + e.toString());

    44
        e.printStackTrace();

    45
        return null;

    46
    } catch (UnsupportedEncodingException e) {

    47
        System.out.println("UnsupportedEncodingException:" + e.toString());

    48
        e.printStackTrace();

    49
    } catch (SocketTimeoutException e) {

    50
        System.out.println("SocketTimeoutException:" + e.toString());

    51
        e.printStackTrace();

    52
    } catch (IOException e) {

    53
        System.out.println("IOException:" + e.toString());

    54
        e.printStackTrace();

    55
    }

调用发现登陆成功后在获取工作任务时服务器提示未登陆,看来是没把cookie发送到服务器,由是找资料

修改后如下,有两个类
WebHelperResponse.java

  
    1
    package com.demo.utils;

    2
     
    3
    public class WebHelperResponse {

    4
        public String ResponseText = "";

    5
        public boolean IsOk = false;

    6
        public boolean IsError = false;

    7
        public String ErrMsg = "";

    8
    }

WebHelper.java

  
    001
    package com.nt.android.app.slorders.utils;

    002
     
    003
    import java.io.IOException;

    004
    import java.net.SocketTimeoutException;

    005
    import java.util.ArrayList;

    006
    import java.util.List;

    007
    import org.apache.http.HttpResponse;

    008
    import org.apache.http.NameValuePair;

    009
    import org.apache.http.client.CookieStore;

    010
    import org.apache.http.client.entity.UrlEncodedFormEntity;

    011
    import org.apache.http.client.methods.HttpPost;

    012
    import org.apache.http.impl.client.AbstractHttpClient;

    013
    import org.apache.http.impl.client.DefaultHttpClient;

    014
    import org.apache.http.message.BasicNameValuePair;

    015
    import org.apache.http.params.CoreConnectionPNames;

    016
    import org.apache.http.protocol.HTTP;

    017
    import org.apache.http.util.EntityUtils;

    018
     
    019
    public class WebHelper {

    020
     
    021
        private static CookieStore cookieStore;

    022
     
    023
        public static WebHelperResponse postJson(String url, String data) {

    024
            return postData(url, data, "jsondata");

    025
        }

    026
     
    027
        public static WebHelperResponse postXml(String url, String data) {

    028
            return postData(url, data, "xmldata");

    029
        }

    030
     
    031
        // url参数中不允许有空格,否则将在new HttpPost(url)引发java.lang.IllegalArgumentException错误

    032
        public static WebHelperResponse postData(String url, String data,

    033
                String para) {

    034
            WebHelperResponse m_response = new WebHelperResponse();

    035
            m_response.IsOk = false;

    036
            m_response.IsError = false;

    037
     
    038
            String result = "";

    039
            /* HTTP Post */

    040
            HttpPost httpRequest = new HttpPost(url);

    041
            // param NameValuePair[]

    042
            // request.getParameter("name")

    043
            List<NameValuePair> params = new ArrayList<NameValuePair>();

    044
            params.add(new BasicNameValuePair(para, data));// jsonParameter

    045
     
    046
            try {

    047
                // HTTP request

    048
                httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

    049
                // HTTP response

    050
     
    051
                DefaultHttpClient defaultHttpClient = new DefaultHttpClient();

    052
                // 请求超时

    053
                defaultHttpClient.getParams().setParameter(

    054
                        CoreConnectionPNames.CONNECTION_TIMEOUT, 10000);

    055
                // 读取超时

    056
                defaultHttpClient.getParams().setParameter(

    057
                        CoreConnectionPNames.SO_TIMEOUT, 10000);

    058
                // 添加Cookie

    059
                if (cookieStore != null) {

    060
                    defaultHttpClient.setCookieStore(cookieStore);

    061
                }

    062
     
    063
                // 发送请求

    064
                HttpResponse httpResponse = defaultHttpClient.execute(httpRequest);

    065
                int responseStatusCode = httpResponse.getStatusLine()

    066
                        .getStatusCode();

    067
                System.out.println("response statuscode:" + responseStatusCode);

    068
                // 得到应答的字符串

    069
                // 200 ok

    070
                if (responseStatusCode == 200) {

    071
                    result = EntityUtils.toString(httpResponse.getEntity());

    072
                    // 保存Cookie

    073
                    cookieStore = ((AbstractHttpClient) defaultHttpClient)

    074
                            .getCookieStore();

    075
     
    076
                    m_response.IsError = false;

    077
                    m_response.IsOk = true;

    078
                    m_response.ResponseText = result;

    079
     
    080
                } else if (responseStatusCode == 404) {

    081
                    // 找不到页面

    082
                    m_response.IsError = true;

    083
                    m_response.IsOk = false;

    084
                    System.out.println("404:page not found.");

    085
                    m_response.ErrMsg = "不存在此服务,请检查服务器地址配置";

    086
                } else {

    087
                    m_response.IsError = true;

    088
                    m_response.IsOk = false;

    089
                    System.out.println("error,responsestatuscode:"

    090
                            + responseStatusCode);

    091
                    m_response.ErrMsg = "服务出错";

    092
                }

    093
            } catch (SocketTimeoutException e) {

    094
                System.out.println("ClientProtocolException:" + e.toString());

    095
                e.printStackTrace();

    096
     
    097
                m_response.IsError = true;

    098
                m_response.IsOk = false;

    099
                m_response.ErrMsg = "连接错误:未能连接到服务器!";

    100
     
    101
            } catch (IOException e) {

    102
                System.out.println("ClientProtocolException:" + e.toString());

    103
                e.printStackTrace();

    104
     
    105
                m_response.IsError = true;

    106
                m_response.IsOk = false;

    107
                m_response.ErrMsg = "错误:服务器未能提供服务!";

    108
     
    109
            }

    110
            return m_response;

    111
        }

    112
     
    113
    }

原文地址：http://www.cnblogs.com/daishuguang/p/3775004.html