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[Java教程][javaSE] java上传图片给PHP

java通过http协议上传图片给php文件,对安卓上传图片给php接口的理解

java文件:

import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;public class HttpUpload {  public static final String API="http://localhost/test.php";  public static void main(String[] args) throws Exception {    String imgUrl="E:\\11.png";    String result=uploadImg(imgUrl);    System.out.println(result);  }  private static String uploadImg(String imgUrl) throws Exception {    File imgFile=new File(imgUrl);    URL url=new URL(API);    HttpURLConnection conn=(HttpURLConnection) url.openConnection();    conn.setConnectTimeout(10000);    conn.setRequestMethod("POST");    conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=----123456789");    conn.setDoInput(true);    conn.setDoOutput(true);        OutputStream os=new DataOutputStream(conn.getOutputStream());    StringBuilder body=new StringBuilder();    body.append("------123456789\r\n");    body.append("Content-Disposition: form-data; name='img'; filename='"+imgFile.getName()+"'\r\n");    body.append("Content-Type: image/jpeg\r\n\r\n");    os.write(body.toString().getBytes());        InputStream is=new FileInputStream(imgFile);    byte[] b=new byte[1024];    int len=0;    while((len=is.read(b))!=-1){      os.write(b,0,len);    }    String end="\r\n------123456789--";    os.write(end.getBytes());        //输出返回结果    InputStream input=conn.getInputStream();    byte[] res=new byte[1024];    int resLen=input.read(res);    return new String(res,0,resLen);  }}

PHP文件

<?phpclass Test{  public static function main(){    header("content-type:text/html;charset=utf-8");    if(!empty($_FILES)){      $test=new Test();      $test->uploadImg();      exit;    }  }  /**  * 上传图片  */  public function uploadImg(){    $res=move_uploaded_file($_FILES['img']['tmp_name'], './'.$_FILES['img']['name']);    if($res){      echo "upload success";    }else{      echo "upload error";    }  }}Test::main();?><form enctype="multipart/form-data" action="test.php" method="post"><input type="file" name="img" /><input type="submit" value="上传" /></form>