java传输本地图片到Android java传输本地图片到Android

【java传输本地图片到Android】实现将本地存储的图片发送到后台
使用springMVC框架，获取本地图片，转换成流输出

@RequestMapping(value="https://www.it610.com/article/showImageDiaLog.do",params={"action=showImageDiaLog"}) public void showImageByType(String filename,HttpServletRequest request,HttpServletResponse response) throws IOException{ InputStream inputStream = null; OutputStream writer = null; filename = new String(filename.getBytes("ISO-8859-1"),"UTF-8"); try { inputStream = new FileInputStream(new File(Constants.getApplicationValue("C\:\\\myeclipseWork\\image\\")+filename)); writer = response.getOutputStream(); byte[] buf = new byte[1024]; int len = 0; while ((len = inputStream.read(buf)) != -1) { writer.write(buf, 0, len); //写 } } catch (Exception e) { logger.error(e.toString()); } finally{ if(inputStream != null){ inputStream.close(); } if(writer != null){ writer.close(); } } }

Android代码请求地址，出入请求的文件名

private String url = "http://192.168.1.132:8080/eSAM/showImageDiaLog.do?action=showImageDiaLog&filename=1.jpg";

使用glide框架获取图片展示

Glide.with(MainActivity.this) .load(url) .into(imageView);

保存在本地，工具类

package com.example.image; import android.content.Context; import android.os.Environment; import android.util.Log; import android.widget.Toast; import com.bumptech.glide.Glide; import com.bumptech.glide.request.animation.GlideAnimation; import com.bumptech.glide.request.target.SimpleTarget; import java.io.File; import java.io.FileOutputStream; /** * Created by user on 20/9/2017. */public class SDFileHelper { private Context context; public SDFileHelper() { }public SDFileHelper(Context context) { super(); this.context = context; }//Glide保存图片 public void savePicture(final String fileName, String url){ Glide.with(context).load(url).asBitmap().toBytes().into(new SimpleTarget() { @Override public void onResourceReady(byte[] bytes, GlideAnimation glideAnimation) { try { savaFileToSD(fileName,bytes); } catch (Exception e) { e.printStackTrace(); } } }); } //往SD卡写入文件的方法 public void savaFileToSD(String filename, byte[] bytes) throws Exception { //如果手机已插入sd卡,且app具有读写sd卡的权限 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { String filePath = Environment.getExternalStorageDirectory().getCanonicalPath()+"/budejie"; File dir1 = new File(filePath); if (!dir1.exists()){ dir1.mkdirs(); } filename = filePath+ "/" + filename; //这里就不要用openFileOutput了,那个是往手机内存中写数据的 FileOutputStream output = new FileOutputStream(filename); output.write(bytes); //将bytes写入到输出流中 output.close(); //关闭输出流 Toast.makeText(context, "图片已成功保存到"+filePath, Toast.LENGTH_SHORT).show(); Log.e("filePath:",filePath); } else { Toast.makeText(context, "SD卡不存在或者不可读写", Toast.LENGTH_SHORT).show(); } } }

保存在sd卡