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javalearner

这是学struts1.2.4自带的例子。所有文件及目录结构请在本站下载。

  

  
  
一、web.xml配置，这里将文件上传配置为upload模块。

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE web-app
   PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
   "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
  <display-name>Struts Blank Application</display-name>
   
   <!-- Standard Action Servlet Configuration (with debugging) -->
   <servlet>
     <servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
     <init-param>
       <param-name>config</param-name>
       <param-value>/WEB-INF/struts-config.xml</param-value>
     </init-param>
     <init-param>
       <param-name>config/upload</param-name>
     <param-value>/WEB-INF/upload/struts-config.xml</param-value>
     </init-param>  
  
   
   
     
   
                     
     
   
  
  
     <init-param>
       <param-name>debug</param-name>
       <param-value>2</param-value>
     </init-param>
     <init-param>
       <param-name>detail</param-name>
       <param-value>2</param-value>
     </init-param>
     <load-on-startup>2</load-on-startup>
   </servlet>


   <!-- Standard Action Servlet Mapping -->
   <servlet-mapping>
     <servlet-name>action</servlet-name>
     <url-pattern>*.do</url-pattern>
   </servlet-mapping>


   <!-- The Usual Welcome File List -->
   <welcome-file-list>
     <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>


   <!-- Struts Tag Library Descriptors -->
   <taglib>
     <taglib-uri>/tags/struts-bean</taglib-uri>
     <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
   </taglib>

   <taglib>
     <taglib-uri>/tags/struts-HTML</taglib-uri>
     <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
   </taglib>

   <taglib>
     <taglib-uri>/tags/struts-logic</taglib-uri>
     <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
   </taglib>

   <taglib>
     <taglib-uri>/tags/struts-nested</taglib-uri>
     <taglib-location>/WEB-INF/struts-nested.tld</taglib-location>
   </taglib>

   <taglib>
     <taglib-uri>/tags/struts-tiles</taglib-uri>
     <taglib-location>/WEB-INF/struts-tiles.tld</taglib-location>
   </taglib>

</web-app>

--------------------------------------------------------------------------------

二、struts-config.xml配置和资源文件

--------------------------------------------------------------------------------
<?xml version="1.0" encoding="iso-8859-1"?>

<!DOCTYPE struts-config PUBLIC
           "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
           "http://struts.apache.org/dtds/struts-config_1_2.dtd">
<struts-config>
   <form-beans>
     <form-bean name="uploadForm" type="org.apache.struts.webapp.upload.UpLoadForm" />
   </form-beans>
   <action-mappings>
     <action path="/upload" forward="/selfile.jsp" />
     <!-- Upload Action -->
     <action path="/uploadsAction"  
             type="org.apache.struts.webapp.upload.UpLoadAction"   
             name="uploadForm" scope="request" input="input">
       <forward name="input" path="/selfile.jsp" />
       <forward name="display" path="/display.jsp" />
     </action>
   </action-mappings>
   <!-- 这里设置上传文件的最大值。 -1 不限制大小。缺省值：-1 -->
   <controller maxFileSize="2M" inputForward="true" />
   <message-resources parameter="org.apache.struts.webapp.upload.UploadResources"/>

</struts-config>

   资源文件：UploadResources_zh_CN.properties
maxLengthExceeded=已经超过了上传文件所允许的最大值。
maxLengthExplanation=注意：这个应用程序允许上传文件的最大值是2M。请看"/WEB-INF/upload/struts-config.xml" 文件更改这个值。

三、选择上传文件页面：selfile.jsp，如此访问此页面：
<html:link module="/upload" page="/upload.do"> 继续上传</html:link></h2>

--------------------------------------------------------------------------------
<%@ page contentType="text/html; charset=GBK" %>
<%@ page import="org.apache.struts.action.*,
                  java.util.Iterator,
                  org.apache.struts.Globals" %>
<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<%@ taglib uri="/tags/struts-logic" prefix="logic" %>
<logic:messagesPresent>
    <ul>
    <html:messages id="error">
       <li><bean:write name="error"/></li>
    </html:messages>
    </ul><hr />
</logic:messagesPresent>
<html:html>

<html:form action="uploadsAction.do" enctype="multipart/form-data">
<html:file property="theFile"/>
<html:submit/>
</html:form>
</html:html>

--------------------------------------------------------------------------------

四、表单bean:  UpLoadForm.java

--------------------------------------------------------------------------------
package org.apache.struts.webapp.upload;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;
import org.apache.struts.upload.*;

/**
  * <p>Title:UpLoadForm</p>
  * <p>Description: QRRSMMS </p>
  * <p>Copyright: Copyright (c) 2004 jiahansoft</p>
  * <p>Company: jiahansoft</p>
  * @author wanghw
  * @version 1.0
  */

public class UpLoadForm extends ActionForm {
   public static final String ERROR_PROPERTY_MAX_LENGTH_EXCEEDED = "org.apache.struts.webapp.upload.MaxLengthExceeded";
   protected FormFile theFile;
   public FormFile getTheFile() {
       return theFile;
   }
   public void setTheFile(FormFile theFile) {
       this.theFile = theFile;
   }
    public ActionErrors validate(
         ActionMapping mapping,
         HttpServletRequest request) {
              
         ActionErrors errors = null;
         //has the maximum length been exceeded?
         Boolean maxLengthExceeded =
             (Boolean) request.getAttribute(
                 MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
                  
         if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue())) {
             errors = new ActionErrors();
             errors.add(
                 ActionMessages.GLOBAL_MESSAGE ,
                 new ActionMessage("maxLengthExceeded"));
             errors.add(
                 ActionMessages.GLOBAL_MESSAGE ,
                 new ActionMessage("maxLengthExplanation"));
         }
         return errors;

     }

}


--------------------------------------------------------------------------------
五、处理上传的文件：UpLoadAction.java  
--------------------------------------------------------------------------------
package org.apache.struts.webapp.upload;
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;  

/**
  * <p>Title:UpLoadAction</p>
  * <p>Description: QRRSMMS </p>
  * <p>Copyright: Copyright (c) 2004 jiahansoft</p>
  * <p>Company: jiahansoft</p>
  * @author wanghw
  * @version 1.0
  */

public class UpLoadAction extends Action {
   public ActionForward execute(ActionMapping mapping,
                                ActionForm form,
                                HttpServletRequest request,
                                HttpServletResponse response)
       throws Exception {
        if (form instanceof UpLoadForm) {//如果form是UpLoadsForm
            String encoding = request.getCharacterEncoding();

        if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
         {
             response.setContentType("text/html; charset=gb2312");
         }
         UpLoadForm theForm = (UpLoadForm ) form;
         FormFile file = theForm.getTheFile();//取得上传的文件
         String contentType = file.getContentType();

         String size = (file.getFileSize() + " bytes");//文件大小
         String fileName= file.getFileName();//文件名
         try {
           InputStream stream = file.getInputStream();//把文件读入
           String filePath = request.getRealPath("/");//取当前系统路径
           ByteArrayOutputStream baos = new ByteArrayOutputStream();
           OutputStream bos = new FileOutputStream(filePath + "/" +
                                                   file.getFileName());
               //建立一个上传文件的输出流，将上传文件存入web应用的根目录。
           //System.out.println(filePath+"/"+file.getFileName());
           int bytesRead = 0;
           byte[] buffer = new byte[8192];
           while ( (bytesRead = stream.read(buffer, 0, 8192)) != -1) {
             bos.write(buffer, 0, bytesRead);//将文件写入服务器
           }
           bos.close();
           stream.close();
         }catch(Exception e){
           System.err.print(e);
         }
         //request.setAttribute("dat",file.getFileName());
          request.setAttribute("contentType", contentType);
          request.setAttribute("size", size);
          request.setAttribute("fileName", fileName);

         return mapping.findForward("display");
     }
     return null;
   }
}
------------------------------------------------------------------------------------------

五、成功页display.jsp  
<%@ page contentType="text/html; charset=GBK" %>
<%@ page import="org.apache.struts.action.*,
                  java.util.Iterator,
                  org.apache.struts.Globals" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>


上传成功！上传信息如下：
<p>
<b>The File name:</b> <%= request.getAttribute("fileName") %>
</p>
<p>
<b>The File content type:</b> <%= request.getAttribute("contentType") %>
</p>
<p>
<b>The File size:</b> <%= request.getAttribute("size") %>
</p>
<hr />
<hr />
<html:link module="/upload" page="/upload.do"> 继续上传</html:link></h2>
  六、测试
  从本站下载整个目录结构TestStruts并放入tomcat的webapps目录下，在浏览器中输入：
http://127.0.0.1:8080/TestStruts/upload/upload.do



  
  
   
   

     
   

     
   
  



源码下载：http://file.javaxxz.com/2014/10/11/005746437.zip