android 封装post请求，包含header data cookie file，并简单调用

好的，以下是一个封装了POST请求的示例代码，它包含了header、data、cookie和file的参数，并且提供了简单的调用方法：

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;

public class HttpUtil {

    private static String boundary = "---------------------------" + System.currentTimeMillis();
    private static String CRLF = "\r\n";

    /**
     * 发送POST请求
     *
     * @param urlStr  请求地址
     * @param headers 请求头部参数
     * @param params  请求参数
     * @param cookies 请求cookie
     * @param files   请求文件
     * @return 返回响应结果
     */
    public static String sendPostRequest(String urlStr, Map<String, String> headers, Map<String, String> params, Map<String, String> cookies, Map<String, File> files) {
        HttpURLConnection conn = null;
        DataOutputStream dos = null;
        FileInputStream fis = null;
        BufferedReader reader = null;
        try {
            URL url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setConnectTimeout(10000);
            conn.setReadTimeout(10000);
            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);

            // 设置请求头部参数
            if (headers != null && !headers.isEmpty()) {
                for (Map.Entry<String, String> entry : headers.entrySet()) {
                    conn.setRequestProperty(entry.getKey(), entry.getValue());
                }
            }

            // 设置请求cookie
            if (cookies != null && !cookies.isEmpty()) {
                StringBuilder sbCookie = new StringBuilder();
                for (Map.Entry<String, String> entry : cookies.entrySet()) {
                    sbCookie.append(entry.getKey()).append("=").append(entry.getValue()).append("; ");
                }
                conn.setRequestProperty("Cookie", sbCookie.toString());
            }

            dos = new DataOutputStream(conn.getOutputStream());

            // 设置请求参数
            if (params != null && !params.isEmpty()) {
                StringBuilder sbParams = new StringBuilder();
                for (Map.Entry<String, String> entry : params.entrySet()) {
                    sbParams.append("--").append(boundary).append(CRLF);
                    sbParams.append("Content-Disposition: form-data; name=\"").append(entry.getKey()).append("\"").append(CRLF);
                    sbParams.append(CRLF);
                    sbParams.append(entry.getValue()).append(CRLF);
                }
                dos.write(sbParams.toString().getBytes());
            }

            // 设置请求文件
            if (files != null && !files.isEmpty()) {
                for (Map.Entry<String, File> entry : files.entrySet()) {
                    File file = entry.getValue();
                    if (!file.exists()) {
                        continue;
                    }
                    // 文件参数头部
                    StringBuilder sbFile = new StringBuilder();
                    sbFile.append("--").append(boundary).append(CRLF);
                    sbFile.append("Content-Disposition: form-data; name=\"").append(entry.getKey()).append("\"; filename=\"").append(file.getName()).append("\"").append(CRLF);
                    sbFile.append("Content-Type: application/octet-stream").append(CRLF);
                    sbFile.append(CRLF);
                    dos.write(sbFile.toString().getBytes());

                    // 文件内容
                    fis = new FileInputStream(file);
                    byte[] buffer = new byte[1024];
                    int len;
                    while ((len = fis.read(buffer)) != -1) {
                        dos.write(buffer, 0, len);
                    }
                    dos.write(CRLF.getBytes());
                }
            }

            // 请求结束标志
            byte[] endData = ("\r\n--" + boundary + "--\r\n").getBytes();
            dos.write(endData);

            // 响应结果
            reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            StringBuilder sbResponse = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sbResponse.append(line);
            }
            return sbResponse.toString();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (dos != null) {
                    dos.close();
                }
                if (fis != null) {
                    fis.close();
                }
                if (reader != null) {
                    reader.close();
                }
                if (conn != null) {
                    conn.disconnect();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}

使用示例：

Map<String, String> headers = new HashMap<>();
headers.put("User-Agent", "Mozilla/5.0");
headers.put("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3");

Map<String, String> params = new HashMap<>();
params.put("name", "John");
params.put("age", "18");

Map<String, String> cookies = new HashMap<>();
cookies.put("session_id", "xxxxxxxxxxxx");

Map<String, File> files = new HashMap<>();
files.put("image", new File("image.png"));

String response = HttpUtil.sendPostRequest("http://localhost:8080/api", headers, params, cookies, files);
System.out.println(response);

以上代码中，首先根据传入的参数构建了一个HTTP连接，并设置了请求的方法为POST。然后根据传入的headers、params、cookies和files参数分别设置了请求头部参数、请求参数、请求cookie和请求文件。最后向服务器发送请求，并读取响应结果返回。