Struts2 文件上传下载-优快云博客

文件上传

必须，导入commons-fileupload-1.3.2.jar和commons-io-2.2.jar

jsp
表单的提交类型需要，改成字节

<h1>文件上传</h1>
  <form action="updata" method="post" enctype="multipart/form-data">
       <input type="file" name="fileName"/><br/>
       <input type="file" name="fileName"/>
       <input type="submit" value="上传"/>
  </form>

建立一个Action

public class FileUpLoad  extends ActionSupport{

    private static final long serialVersionUID = 1L;

    //这个，名字，必须，和 input file  name 相同
    private List<File> fileName;  //具体上传文件的 引用 , 指向临时目录中的临时文件  
    private String [] fileNameFileName; // 上传文件的名字 ,FileName 固定的写法 
    private String[]  fileNameContentType;//上传文件的类型， ContentType 固定的写法



   @Override
    public String execute() throws Exception {
        //取到，文件，需要储存的路径
        String path=ServletActionContext.getRequest().getRealPath("/upload");
        byte[] by=new byte[500];
        int len=0;
        for (int i = 0; i < fileName.size(); i++) {//遍历  需要，上传的文件

            //使用字节输出流  读取
            FileInputStream fileinput=new FileInputStream(fileName.get(i));
            //字节，缓冲输出流
            BufferedInputStream bufferd=new BufferedInputStream(fileinput);

           //字节输入流
            FileOutputStream outPut=new FileOutputStream(path+"\\"+this.getFileNameFileName()[i]);

            BufferedOutputStream Bufferedout=new BufferedOutputStream(outPut);

            while((len=bufferd.read(by))!=-1){  //读取，文件到  字节数组中
                Bufferedout.write(by, 0, len);  //写入  文件                
                Bufferedout.flush();
            }
            fileinput.close();
            bufferd.close();
            outPut.close();
            Bufferedout.close();

            len=0;      
        }

        return Action.SUCCESS;
    }





public List<File> getFileName() {
    return fileName;
}


public void setFileName(List<File> fileName) {
    this.fileName = fileName;
}


public String[] getFileNameFileName() {
    return fileNameFileName;
}


public void setFileNameFileName(String[] fileNameFileName) {
    this.fileNameFileName = fileNameFileName;
}



public String[] getFileNameContentType() {
    return fileNameContentType;
}



public void setFileNameContentType(String[] fileNameContentType) {
    this.fileNameContentType = fileNameContentType;
}



}

xml配置

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>


   <package name="default" extends="struts-default">  
      <!-- 文件 上传 -->
      <action name="updata" class="com.file.movement.FileUpLoad" >
         <result name="success">accomplish.jsp</result>  
      </action> 
   </package>  

</struts>