Struts2文件上传详解

Struts2文件上传： 一：请选参看Struts2_9中的Struts2上传原理 二：加入Struts2的支持 三：页面  <s:form action="upload" method="post" enctype="multipart/form-data">   <s:textfield name="username" label="用户名"></s:textfield>   <s:password name="password" label="密码"></s:password>   <s:file name="myfile" label="文件"></s:file>   <s:submit></s:submit>  </s:form> 四：strus.xml配置说明：  <struts>   <!-- 设置request的编码方式 -->   <constant name="struts.i18n.encoding" value="gbk"></constant>   <!-- 上传大文件临时目录 -->   <constant name="struts.multipart.saveDir" value="c:\"></constant>   <!--    上传的文件大于多少时将放到临时目录中，否则放到内存中    Struts2默认的大为2097152即2M     <constant name="struts.multipart.maxSize" value=""></constant>    -->   <package name="mengya" extends="struts-default">        <action name="upload" class="com.mengya.action.UploadAction">     <result name="success">/result.jsp</result>    </action>       </package>  </struts> 五：上传的Action说明：  /**   * Struts2上传   * @author 张明学   *   */  public class UploadAction extends ActionSupport {   private String username;     private String password;   /**    * 对应页面中的File标签的名称    */   private File myfile;     /**    * 这个属性由Struts2自动生成。规则：File字段的属性名+FileName和File字段的属性名+ContentType    * File字段的属性名+FileName表示上传的文件名    */   private String myfileFileName;     /**    * File字段的属性名+ContentType表示上传的文件的类型    */   private String myfileContentType;     @Override   public String execute() throws Exception {        InputStream is=new FileInputStream(myfile);    /**     * 上传到服务器的目录     */    String root=ServletActionContext.getRequest().getRealPath("/upload");        File destFile=new File(root,this.getMyfileFileName());        OutputStream os=new FileOutputStream(destFile);        byte[] buffer=new byte[400];        int length=0;        while((length=is.read(buffer))>0){     os.write(buffer,0,length);    }    os.close();    is.close();        return SUCCESS;   }     public File getMyfile() {    return myfile;   }     public void setMyfile(File myfile) {    this.myfile = myfile;   }     public String getPassword() {    return password;   }     public void setPassword(String password) {    this.password = password;   }     public String getUsername() {    return username;   }     public void setUsername(String username) {    this.username = username;   }     public String getMyfileContentType() {    return myfileContentType;   }     public void setMyfileContentType(String myfileContentType) {    this.myfileContentType = myfileContentType;   }     public String getMyfileFileName() {    return myfileFileName;   }     public void setMyfileFileName(String myfileFileName) {    this.myfileFileName = myfileFileName;   }    }