JAVA 关于图片上传的代码

private File file;

private String fileFileName;
private String picture;
//都有getter 和 setter

InputStream is = new FileInputStream(file);
//引入一个IO流的输入流
String root = ServletActionContext.getRequest()
.getRealPath("/bookpicture");
//通过REQUEST来得到相对地址，并在后面加上/bookpicture

File f = new File(root, this.getFileFileName());
//定义一个FILE文件，第一个参数是文件的路径，第二个是文件的名字

picture="."+"\\"+"bookpicture"+"\\"+this.getFileFileName();
//为PICTURE字符串赋值，/地址/文件名
System.out.println
("======picture====="+picture);
//从控制台输出Picture

OutputStream os = new FileOutputStream(f);
//第一个文件的输出流

byte[] buffer = new byte[1024];
//定义一个bufer的字符串，长度为1024

int len = 0;
while ((len = is.read(buffer)) > 0) {
//如果从制定文件中读取到的信息为结束就继续循环
os.write(buffer, 0, len);
//将文件读出的内容写入到指定的文件中

}

package com;import java.io.*;import javax.servlet.*;import javax.servlet.http.*;import javax.servlet.jsp.*;import com.jspsmart.upload.*;public class uploadfiles extends HttpServlet{public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{//使用了一个第三方的组件，存放在web-inf/lib下response.setContentType("text/html;charset=GB2312");//由于SmartUpload的初始化方法需要pageContext,所以我们在servlet中得到他//为了得到pageConext要首先得到JspFactory的实例//通过JspFactory的实例的getPageContext方法得到pageConext的实例JspFactory jf = null;//得到JspFactory的实例jf=JspFactory.getDefaultFactory();/*getPageContext(Servlet servlet,ServletRequest request,ServletResponse response,java.lang.String errorPageURL,boolean needsSession,int buffer,boolean autoflush)*/PageContext pageContext=jf.getPageContext(this,request,response,null,true,8192,true);try{//实例化SmartUploadSmartUpload mySmartUpload=new SmartUpload();//初始化SmartUpload的实例，需要PageContext的实例mySmartUpload.initialize(pageContext);//设定最大上传的字节数，其实可以不进行设定，表示上传的文件没有大小限制//mySmartUpload.setTotalMaxFileSize(10000000);mySmartUpload.upload();//下面是单文件上传//上传的文件以com.jspsmart.upload.File 代表，如果文件名称重复，则进行覆盖com.jspsmart.upload.File file=mySmartUpload.getFiles().getFile(0);String upLoadFileName=file.getFileName();//调用com.jspsmart.upload.File实例的saveas的方法保存文件，此时的文件名即是//保存到服务器上的文件名file.saveAs("/upload/"+upLoadFileName);Request req =Text t = .....;t.setUpload(upLoadFileName);t.set.....(req);}catch(SmartUploadException e){System.out.println(e.getMessage());}}protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, java.io.IOException{doGet(request,response);}}