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Java使用commons-fileupload进行文件上传

2016-05-16 17:21 591 查看

1.index.jsp

<body>
<form action="CommonsFileUploadServlet" method="post" enctype="multipart/form-data">
<input type="file" name="file"/><br>
<input type="file" name="file"/><br>
文件描述<br><textarea rows="3" cols="20" name="desc"></textarea><br>
<input type="text" name="t"/><br>
<input type="submit" value="上传"/>
</form>
</body>

CommonsFileUploadServlet

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
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.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class CommonsFileUploadServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//服务器存储客户端传输的文件目录
String root = this.getInitParameter("root");
ServletFileUpload sfu = new ServletFileUpload(new DiskFileItemFactory());
//设置允许上传的文件大小
sfu.setFileSizeMax(1024*1024*200);
//设置允许上传数据总大小
sfu.setSizeMax(1024*1024*200);
try {
//对request进行解析
List<FileItem> list = sfu.parseRequest(request);
Iterator<FileItem> it = list.iterator();
while(it.hasNext()){
FileItem item = it.next();
//判断当前迭代到的FileItem对象是否是一个表单字段
if(item.isFormField()){
//获取表单字段的name值
String name = item.getFieldName();
//获取表单字段value值
String value = item.getString();
}else{
//说明当前对象是一个文件对象
//获取文件名
String fname = item.getName();
//将文件写入服务器中指定的空文件
item.write(new File(root,fname));
System.out.println("!!!!");
}
}
} catch (FileUploadException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
}

}

3.web.xml

<servlet>
<servlet-name>CommonsFileUploadServlet</servlet-name>
<servlet-class>com.softeem.servlet.CommonsFileUploadServlet</servlet-class>
<init-param>
<param-name>root</param-name>
<param-value>G:\\fileupload</param-value>
</init-param>
</servlet>

jar包下载地址：
http://download.csdn.net/detail/hoho_12/9521875

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标签： java

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