折腾了好几天的 HTTP 终于搞定了，经测试正常，不过是初步用例测试用的，因为后面还要修改先把当前版本保存在博客里吧。

其中POST因为涉及多段上传需要导入两个包文件，我用的是最新的 httpmine4.3 发现网上很多 MultipartEntity 相关的文章都是早起版本的，以前的一些方法虽然还可用，但新版本中已经不建议使用了，所以全部使用新的方式 MultipartEntityBuilder 来处理了。

httpmime-4.3.2.jar  
httpcore-4.3.1.jar 

下载地址：http://hc.apache.org/downloads.cgi

有些镜像貌似打不开，页面上可以可以选择国内的 .cn 后缀的域名镜像服务器来下载

如果是 android studio 这里可能会遇到一个问题：Android Duplicate files copied in APK

经测试 POST 对中文处理也是正常的，没有发现乱码

下面是完整代码：

ZHttpRequest.java

package com.ai9475.util;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

/**
 * Created by ZHOUZ on 14-2-3.
 */
public class ZHttpRequest
{
    protected String url = "";

    protected Map<String, String> headers = null;

    protected int connectionTimeout = 5000;

    protected int soTimeout = 10000;

    protected int statusCode = 200;

    protected String charset = HTTP.UTF_8;

    protected HttpGet httpGet;

    protected HttpPost httpPost;

    protected HttpParams httpParameters;

    protected HttpResponse httpResponse;

    protected HttpClient httpClient;

    protected String inputContent;

    /**
     * 设置当前请求的链接
     *
     * @param url
     * @return
     */
    public ZHttpRequest setUrl(String url)
    {
        this.url = url;
        return this;
    }

    /**
     * 设置请求的 header 信息
     *
     * @param headers
     * @return
     */
    public ZHttpRequest setHeaders(Map headers)
    {
        this.headers = headers;
        return this;
    }

    /**
     * 设置连接超时时间
     *
     * @param timeout 单位（毫秒），默认 5000
     * @return
     */
    public ZHttpRequest setConnectionTimeout(int timeout)
    {
        this.connectionTimeout = timeout;
        return this;
    }

    /**
     * 设置 socket 读取超时时间
     *
     * @param timeout 单位（毫秒），默认 10000
     * @return
     */
    public ZHttpRequest setSoTimeout(int timeout)
    {
        this.soTimeout = timeout;
        return this;
    }

    /**
     * 设置获取内容的编码格式
     *
     * @param charset 默认为 UTF-8
     * @return
     */
    public ZHttpRequest setCharset(String charset)
    {
        this.charset = charset;
        return this;
    }

    /**
     * 获取 HTTP 请求响应信息
     *
     * @return
     */
    public HttpResponse getHttpResponse()
    {
        return this.httpResponse;
    }

    /**
     * 获取 HTTP 客户端连接管理器
     *
     * @return
     */
    public HttpClient getHttpClient()
    {
        return this.httpClient;
    }

    /**
     * 获取请求的状态码
     *
     * @return
     */
    public int getStatusCode()
    {
        return this.statusCode;
    }

    /**
     * 通过 GET 方式请求数据
     *
     * @param url
     * @return
     * @throws IOException
     */
    public String get(String url) throws IOException
    {
        // 设置当前请求的链接
        this.setUrl(url);
        // 实例化 GET 连接
        this.httpGet = new HttpGet(this.url);
        // 自定义配置 header 信息
        this.addHeaders(this.httpGet);
        // 初始化客户端请求
        this.initHttpClient();
        // 发送 HTTP 请求
        this.httpResponse = this.httpClient.execute(this.httpGet);
        // 读取远程数据
        this.getInputStream();
        // 远程请求状态码是否正常
        if (this.statusCode != HttpStatus.SC_OK) {
            return null;
        }
        // 返回全部读取到的字符串
        return this.inputContent;
    }

    public String post(String url, Map<String, String> datas, Map<String, String> files) throws IOException
    {
        this.setUrl(url);
        // 实例化 GET 连接
        this.httpPost = new HttpPost(this.url);
        // 自定义配置 header 信息
        this.addHeaders(this.httpPost);
        // 初始化客户端请求
        this.initHttpClient();
        Iterator iterator = datas.entrySet().iterator();
        MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
        multipartEntityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
        multipartEntityBuilder.setCharset(Charset.forName(this.charset));
        // 发送的数据
        while (iterator.hasNext()) {
            Map.Entry<String, String> entry = (Map.Entry<String, String>) iterator.next();
            multipartEntityBuilder.addTextBody(entry.getKey(), entry.getValue(), ContentType.create("text/plain", Charset.forName(this.charset)));
        }
        // 发送的文件
        if (files != null) {
            iterator = files.entrySet().iterator();
            while (iterator.hasNext()) {
                Map.Entry<String, String> entry = (Map.Entry<String, String>) iterator.next();
                String path = entry.getValue();
                if ("".equals(path) || path == null) continue;
                File file = new File(entry.getValue());
                multipartEntityBuilder.addBinaryBody(entry.getKey(), file);
            }
        }
        // 生成 HTTP 实体
        HttpEntity httpEntity = multipartEntityBuilder.build();
        // 设置 POST 请求的实体部分
        this.httpPost.setEntity(httpEntity);
        // 发送 HTTP 请求
        this.httpResponse = this.httpClient.execute(this.httpPost);
        // 读取远程数据
        this.getInputStream();
        // 远程请求状态码是否正常
        if (this.statusCode != HttpStatus.SC_OK) {
            return null;
        }
        // 返回全部读取到的字符串
        return this.inputContent.toString();
    }

    /**
     * 为 HTTP 请求添加 header 信息
     *
     * @param request
     */
    protected void addHeaders(HttpRequestBase request)
    {
        if (this.headers != null) {
            Set keys = this.headers.entrySet();
            Iterator iterator = keys.iterator();
            Map.Entry<String, String> entry;
            while (iterator.hasNext()) {
                entry = (Map.Entry<String, String>) iterator.next();
                request.addHeader(entry.getKey().toString(), entry.getValue().toString());
            }
        }
    }

    /**
     * 配置请求参数
     */
    protected void setParams()
    {
        this.httpParameters = new BasicHttpParams();
        this.httpParameters.setParameter("charset", this.charset);
        // 设置 连接请求超时时间
        HttpConnectionParams.setConnectionTimeout(this.httpParameters, this.connectionTimeout);
        // 设置 socket 读取超时时间
        HttpConnectionParams.setSoTimeout(this.httpParameters, this.soTimeout);
    }

    /**
     * 初始化配置客户端请求
     */
    protected void initHttpClient()
    {
        // 配置 HTTP 请求参数
        this.setParams();
        // 开启一个客户端 HTTP 请求
        this.httpClient = new DefaultHttpClient(this.httpParameters);
    }

    /**
     * 读取远程数据
     *
     * @throws IOException
     */
    protected void getInputStream() throws IOException
    {
        // 接收远程输入流
        InputStream inStream = this.httpResponse.getEntity().getContent();
        // 分段读取输入流数据
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];
        int len = -1;
        while ((len = inStream.read(buf)) != -1) {
            baos.write(buf, 0, len);
        }
        // 将数据转换为字符串保存
        this.inputContent = new String(baos.toByteArray());
        // 数据接收完毕退出
        inStream.close();
        // 获取请求返回的状态码
        this.statusCode = this.httpResponse.getStatusLine().getStatusCode();
    }

    /**
     * 关闭连接管理器释放资源
     */
    protected void shutdownHttpClient()
    {
        if (this.httpClient != null && this.httpClient.getConnectionManager() != null) {
            this.httpClient.getConnectionManager().shutdown();
        }
    }
}

MainActivity.java

这个我就只写事件部分了

    public void doClick(View view)
    {
        ZHttpRequest request = new ZHttpRequest();
        String url = "";
        TextView textView = (TextView) findViewById(R.id.showContent);
        String content = "空内容";
        try {
            if (view.getId() == R.id.doGet) {
                url = "http://www.baidu.com";
                content = "GET数据：" + request.get(url);
            } else {
                url = "http://192.168.1.6/test.php";
                HashMap<String, String> datas = new HashMap<String, String>();
                datas.put("p1", "abc");
                datas.put("p2", "中文");
                datas.put("p3", "abc中文cba");
                datas.put("pic", this.picPath);
                HashMap<String, String> files = new HashMap<String, String>();
                files.put("file", this.picPath);
                content = "POST数据：" + request.post(url, datas, files);
            }

        } catch (IOException e) {
            content = "IO异常：" + e.getMessage();
        } catch (Exception e) {
            content = "异常：" + e.getMessage();
        }
        textView.setText(content);
    }

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    >
    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        >
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="vertical"
            >
            <Button
                android:id="@+id/doGet"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginBottom="10dp"
                android:text="GET请求"
                android:onClick="doClick"
                />
            <Button
                android:id="@+id/doPost"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginBottom="10dp"
                android:text="POST请求"
                android:onClick="doClick"
                />
            <Button
                android:id="@+id/doPhoto"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginBottom="10dp"
                android:text="拍照"
                android:onClick="doPhoto"
                />
            <ImageView
                android:id="@+id/showPhoto"
                android:layout_width="fill_parent"
                android:layout_height="250dp"
                android:scaleType="centerCrop"
                android:src="@drawable/add"
                android:layout_marginBottom="10dp"
                />
            <TextView
                android:id="@+id/showContent"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginBottom="10dp"
                />
        </LinearLayout>
    </ScrollView>
</LinearLayout>

Android 发送HTTP GET POST 请求以及通过 MultipartEntityBuilder 上传文件