android studio上传图片到java服务器
勇敢的小提莫 人气:01.build.gradle配置(增加)
dependencies{ implementation 'com.squareup.okhttp3:okhttp:4.9.0' implementation 'org.conscrypt:conscrypt-android:2.5.1' }
2.AndroidManifest.xml配置权限
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
在application里面添加android:usesCleartextTraffic="true"
3.安卓前端部分
3.1xml样式界面
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <Button android:id="@+id/btn" android:layout_width="150dp" android:layout_height="100dp" android:text="上传"/> </LinearLayout>
3.2安卓后台代码MainActivity
package com.example.upload; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Toast; import org.json.JSONException; import org.json.JSONObject; import java.io.File; import java.io.IOException; import okhttp3.MediaType; import okhttp3.MultipartBody; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.RequestBody; import okhttp3.Response; public class MainActivity extends AppCompatActivity { private Button btn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn = findViewById(R.id.btn); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { String result = "{\"data\": \"0\"}"; new Thread(new Runnable(){ @Override public void run() { String img = Environment.getExternalStorageDirectory()+"/1/123456789.png"; String url = "http://192.168.0.103:8019/uploadAudio"; try { uploadImage(url,img); } catch (IOException e) { Looper.prepare(); e.printStackTrace(); Looper.loop(); } catch (JSONException e) { e.printStackTrace(); } //创建信息对象 Message message = Message.obtain(); Bundle bundle = new Bundle(); bundle.putString("data",result); message.setData(bundle);//向主线程发信息 addTrackHandler.sendMessage(message); } }).start(); } }); } /** * 上传图片 * @param url * @param imagePath 图片路径 * @return 新图片的路径 * @throws IOException * @throws JSONException */ public static String uploadImage(String url, String imagePath) throws IOException, JSONException { OkHttpClient okHttpClient = new OkHttpClient(); File file = new File(imagePath); RequestBody image = RequestBody.create(MediaType.parse("image/png"), file); RequestBody requestBody = new MultipartBody.Builder() .setType(MultipartBody.FORM) .addFormDataPart("file", imagePath, image) .build(); Request request = new Request.Builder() .url(url) .post(requestBody) .build(); Response response = okHttpClient.newCall(request).execute(); JSONObject jsonObject = new JSONObject(response.body().string()); return jsonObject.optString("image"); } Handler addTrackHandler = new Handler(new Handler.Callback() { @Override public boolean handleMessage(Message message) { String result = ""; try { result = message.getData().getString("data"); Toast.makeText(MainActivity.this, "新增成功", Toast.LENGTH_SHORT).show(); }catch (Exception e){ } //Toast.makeText(MainActivity.this, "调用成功"+result, Toast.LENGTH_SHORT).show();//测试弹框 return true; } }); }
4.spring boot后台接受图片并写入本地路径
@RequestMapping("/uploadAudio") @ResponseBody public void uploadAudio(@RequestParam MultipartFile file) { System.out.println(file.getOriginalFilename()); if (!file.isEmpty()) { String filename = file.getOriginalFilename(); System.out.println("Load fn:" + filename); try { String fileurl = "d:/Download/testt.png"; File f = new File(fileurl); BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f)); if (!f.exists()) { try { f.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } out.write(file.getBytes()); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } }else { System.out.println("上传失败,因为文件是空的."); } }
注:如果上传图片提示没有权限,则长按apk图标,打开读取本地文件的权限即可
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