作者：手机用户2502937447 | 来源：互联网 | 2023-05-18 06:59
需要在android端加入commons-httpclient-3.1.jar文件而servlet端需要fileupload和io的jar包代码如下比较简单、1.Http上传封装好的类pa
需要在android端加入commons-httpclient-3.1.jar 文件 而servlet端需要 fileupload和io 的jar包
代码如下 比较简单、
1.Http上传封装好的类
package com.example.root.ppload;
import java.io.File;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.multipart.FilePart;
import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
import org.apache.commons.httpclient.methods.multipart.Part;
import org.apache.commons.httpclient.methods.multipart.StringPart;
public class Hclient
{
public void UpLoadFile(String str) {
String targetURL = null;
File targetFile = null;
targetFile = new File(str);
targetURL = "http://10.0.2.2:8899/Fuck/upload"; // servleturl
PostMethod filePost = new PostMethod(targetURL);
try {
/**
* Filepart存入文件
* StringPart存入想要附带的参数
*/
Part[] parts =
{new FilePart(targetFile.getName(), targetFile)
,new StringPart("name","xingshang")};
filePost.setRequestEntity(new MultipartRequestEntity(
parts, filePost.getParams()));
HttpClient client = new HttpClient();
client.getHttpConnectionManager().getParams()
.setConnectionTimeout(5000);
int status = client.executeMethod(filePost);
if (status == HttpStatus.SC_OK) {
System.out.println("上传成功");
// 上传成功
} else {
System.out.println("上传失败");
// 上传失败
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
filePost.releaseConnection();
}
}
}
接下来就是M啊inActivity、
package com.example.root.ppload;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
public class MainActivity extends Activity {
private Button mButton;
private String str1 = Environment.getExternalStorageDirectory()+"/android.txt";
private String str2 = Environment.getExternalStorageDirectory()+"/1.c";
private int mFlag = 0;
Hclient hclient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButton = (Button) findViewById(R.id.sub);
hclient = new Hclient();
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mFlag++;
if (mFlag == 1) {
hclient.UpLoadFile(str1);
hclient.UpLoadFile(str2);
} else if (mFlag == 2) {
hclient.UpLoadFile(str2);
} else {
}
}
});
}
}
Servlet如下
package com.web.cn;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.output.ThresholdingOutputStream;
public class TestServlets extends HttpServlet
{
private String uploadPath = "C:\\Users\\root\\Desktop\\files\\"; // 上传文件的目录
private File tempPathFile;
public void init() throws ServletException {
File uploadFile = new File(uploadPath);
if (!uploadFile.exists()) {
uploadFile.mkdirs();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
File savedFile = null;
// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory();
// Set factory constraints
factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb
factory.setRepository(tempPathFile);// 设置缓冲区目录
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Set overall request size constraint
upload.setSizeMax(4194304); // 设置最大文件尺寸，这里是4MB
List items = upload.parseRequest(request);// 得到所有的文件
Iterator i = items.iterator();
while (i.hasNext()) {
FileItem fi = (FileItem) i.next();
if(fi.isFormField()){
System.out.println(fi.getFieldName()+"/"+fi.getString());
}else{
String fileName = fi.getName();
System.out.println(fileName);
if (fileName != null) {
savedFile = new File(uploadPath, fileName);
fi.write(savedFile);
}
}
}
System.out.println(savedFile.getAbsolutePath());
System.out.print("upload succeed");
} catch (Exception e) {
System.out.println(e.getMessage());
// 可以跳转出错页面
e.printStackTrace();
}
}
}
需要的就是在web.xml中声明的哦
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