Java 将多部分表单数据上载到php_Java_Php_Android_Forms_Upload

Java 将多部分表单数据上载到php

java php android forms

Java 将多部分表单数据上载到php,java,php,android,forms,upload,Java,Php,Android,Forms,Upload,我想上传任何数据（用户名，描述，…）和照片从我的Android应用到我的服务器（PHP脚本）通过搜索，我找到了一个解决方案：点击我的发送按钮，上传过程开始，php脚本工作，但是$u POST-Vars是空的？有人能帮我吗？我的请求代码： [...] case R.id.btnSend: String strName = tName.getText().toString(); String strEmail = tEmail.getText().toString();

我想上传任何数据（用户名，描述，…）和照片从我的Android应用到我的服务器（PHP脚本）

通过搜索，我找到了一个解决方案：

点击我的发送按钮，上传过程开始，php脚本工作，但是$u POST-Vars是空的？有人能帮我吗？我的请求代码：

[...]
case R.id.btnSend:
    String strName = tName.getText().toString();
    String strEmail = tEmail.getText().toString();
    String strDatum = tDatum.getText().toString();
    String strBeschreibung = tBeschreibung.getText().toString();        

    nvPairs = new ArrayList<NameValuePair>(2);
    nvPairs.add(new BasicNameValuePair("sender", "AndoidApp"));
    nvPairs.add(new BasicNameValuePair("name", strName));
    nvPairs.add(new BasicNameValuePair("email", strEmail));
    nvPairs.add(new BasicNameValuePair("datum", strDatum));
    nvPairs.add(new BasicNameValuePair("beschreibung", strBeschreibung));
    nvPairs.add(new BasicNameValuePair("bild", bmpUrl));

    new UploadTask().execute();
}
[...]

private class UploadTask extends AsyncTask<Void, Void, List<String>> {
    @Override
    protected List<String> doInBackground(Void... params) {
        String response = "";
        try {
            response = new MultipartServer().postData(new URL(postUrl), nvPairs);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }       
}

为此：

if ((avatarName = pair.getName()).equals("bild")) {
    avatarPath = pair.getValue();
}

变量“bmpUrl”和“postrl”在代码的另一行正确设置。

谢谢您的帮助！我找到了解决这个问题的办法。问题出在来自的脚本上

我把它改成这样：

public class MultipartServer {

    private static final String TAG = "MultipartServer";
    private static final String crlf = "\r\n";
    private static final String twoHyphens = "--";
    private static final String boundary = "AaB03x"; //*****
    private String avatarName = null;
    private String avatarPath = null;

    public String postData(URL url, List<NameValuePair> nameValuePairs) throws IOException {

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setReadTimeout(10000);
        connection.setConnectTimeout(15000);
        connection.setRequestMethod("POST");
        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);

        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);

        FileInputStream inputStream;
        OutputStream outputStream = connection.getOutputStream();
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);

        for (NameValuePair pair : nameValuePairs) {
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + crlf);
            dataOutputStream.writeBytes(
                    "Content-Disposition: form-data; name=\""
                    + URLEncoder.encode(pair.getName(), "UTF-8") 
                    + "\";" + crlf);
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(URLEncoder.encode(pair.getValue(), "UTF-8"));
            if (pair.getName().equals("bild")) {
                avatarName = pair.getName();
                avatarPath = pair.getValue();
            }
        }

        // Write Avatar (if any)
        if (avatarName != null && avatarPath != null) {
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + crlf);
            dataOutputStream
                    .writeBytes("Content-Disposition: form-data; name=\""
                            + avatarName + "\";filename=\""
                            + new File(avatarPath).getName() + "\";" + crlf);
            dataOutputStream.writeBytes(crlf);

            inputStream = new FileInputStream(avatarPath);
            byte[] data = new byte[1024];
            int read;
            while ((read = inputStream.read(data)) != -1)
                dataOutputStream.write(data, 0, read);
            inputStream.close();

            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + twoHyphens + crlf);
        }

        dataOutputStream.flush();
        dataOutputStream.close();

        String responseMessage = connection.getResponseMessage();
        Log.d(TAG, responseMessage);

        InputStream in = connection.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(
                new InputStreamReader(in, "UTF-8"));

        StringBuilder response = new StringBuilder();
        char[] b = new char[512];
        int read;
        while ((read = bufferedReader.read(b)) != -1) {
            response.append(b, 0, read);
        }

        connection.disconnect();
        Log.d(TAG, response.toString());
        return response.toString();
    }
}

公共类MultipartServer{
私有静态最终字符串TAG=“MultipartServer”；
私有静态最终字符串crlf=“\r\n”；
私有静态最终字符串twoHyphens=“--”；
私有静态最终字符串边界=“AaB03x”//*****
私有字符串avatarName=null；
私有字符串avatarPath=null；
公共字符串postData（URL、列表nameValuePairs）引发IOException{
HttpURLConnection connection=（HttpURLConnection）url.openConnection（）；
connection.setReadTimeout（10000）；
连接。设置连接超时（15000）；
connection.setRequestMethod（“POST”）；
connection.setUseCaches（false）；
connection.setDoInput（true）；
connection.setDoOutput（真）；
setRequestProperty（“连接”，“保持活动”）；
setRequestProperty（“缓存控制”、“无缓存”）；
connection.setRequestProperty（“内容类型”、“多部分/表单数据；边界=“+boundary”）；
文件输入流输入流；
OutputStream OutputStream=connection.getOutputStream（）；
DataOutputStream DataOutputStream=新的DataOutputStream（outputStream）；
for（NameValuePair对：nameValuePairs）{
dataOutputStream.writeBytes（crlf）；
dataOutputStream.writeBytes（两个连字符+边界+crlf）；
dataOutputStream.writeBytes(
“内容处置：表单数据；名称=\”
+URLEncoder.encode（pair.getName（），“UTF-8”）
+“\”；“+crlf）；
dataOutputStream.writeBytes（crlf）；
dataOutputStream.writeBytes（urlcoder.encode（pair.getValue（），“UTF-8”）；
if（pair.getName（）.equals（“bild”））{
avatarName=pair.getName（）；
avatarPath=pair.getValue（）；
}
}
//编写化身（如果有）
if（avatarName！=null&&avatarPath！=null）{
dataOutputStream.writeBytes（crlf）；
dataOutputStream.writeBytes（两个连字符+边界+crlf）；
数据输出流
.writeBytes（“内容处置：表单数据；名称=\”
+虚拟名称+“\”文件名=\“”
+新文件（avatarPath.getName（）+“\”；“+crlf）；
dataOutputStream.writeBytes（crlf）；
inputStream=新文件inputStream（虚拟路径）；
字节[]数据=新字节[1024]；
int-read；
而（（read=inputStream.read（data））！=-1）
写入（数据，0，读取）；
inputStream.close（）；
dataOutputStream.writeBytes（crlf）；
dataOutputStream.writeBytes（两个连字符+边界+两个连字符+crlf）；
}
dataOutputStream.flush（）；
dataOutputStream.close（）；
字符串responseMessage=connection.getResponseMessage（）；
Log.d（标签、响应消息）；
InputStream in=connection.getInputStream（）；
BufferedReader BufferedReader=新的BufferedReader(
新的InputStreamReader（在“UTF-8”中）；
StringBuilder响应=新建StringBuilder（）；
char[]b=新字符[512]；
int-read；
而（（read=bufferedReader.read（b））！=-1）{
追加（b，0，read）；
}
连接断开（）；
Log.d（TAG，response.toString（））；
返回response.toString（）；
}
}

美元后变元是空的？

。这就是php。但是您没有显示php脚本。请吧。如果postData（）？在

newuploadtask（）.execute（）中，返回字符串是什么您没有传递数据。有关示例，请参阅，并特别注意，execute在调用时传递变量。@Jeremy。请不要混淆OP。他正在将所有名称-值对作为postData（）调用的参数传递。@greenapps为您的混淆感到抱歉。您是否看到这些变量以线程安全的方式出现在异步任务中的作用域。我从未见过AsyncTask使用全局（到活动）数据时出现问题。
public class MultipartServer {

    private static final String TAG = "MultipartServer";
    private static final String crlf = "\r\n";
    private static final String twoHyphens = "--";
    private static final String boundary = "AaB03x"; //*****
    private String avatarName = null;
    private String avatarPath = null;

    public String postData(URL url, List<NameValuePair> nameValuePairs) throws IOException {

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setReadTimeout(10000);
        connection.setConnectTimeout(15000);
        connection.setRequestMethod("POST");
        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);

        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Cache-Control", "no-cache");
        connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);

        FileInputStream inputStream;
        OutputStream outputStream = connection.getOutputStream();
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);

        for (NameValuePair pair : nameValuePairs) {
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + crlf);
            dataOutputStream.writeBytes(
                    "Content-Disposition: form-data; name=\""
                    + URLEncoder.encode(pair.getName(), "UTF-8") 
                    + "\";" + crlf);
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(URLEncoder.encode(pair.getValue(), "UTF-8"));
            if (pair.getName().equals("bild")) {
                avatarName = pair.getName();
                avatarPath = pair.getValue();
            }
        }

        // Write Avatar (if any)
        if (avatarName != null && avatarPath != null) {
            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + crlf);
            dataOutputStream
                    .writeBytes("Content-Disposition: form-data; name=\""
                            + avatarName + "\";filename=\""
                            + new File(avatarPath).getName() + "\";" + crlf);
            dataOutputStream.writeBytes(crlf);

            inputStream = new FileInputStream(avatarPath);
            byte[] data = new byte[1024];
            int read;
            while ((read = inputStream.read(data)) != -1)
                dataOutputStream.write(data, 0, read);
            inputStream.close();

            dataOutputStream.writeBytes(crlf);
            dataOutputStream.writeBytes(twoHyphens + boundary + twoHyphens + crlf);
        }

        dataOutputStream.flush();
        dataOutputStream.close();

        String responseMessage = connection.getResponseMessage();
        Log.d(TAG, responseMessage);

        InputStream in = connection.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(
                new InputStreamReader(in, "UTF-8"));

        StringBuilder response = new StringBuilder();
        char[] b = new char[512];
        int read;
        while ((read = bufferedReader.read(b)) != -1) {
            response.append(b, 0, read);
        }

        connection.disconnect();
        Log.d(TAG, response.toString());
        return response.toString();
    }
}