1
我有點困惑。它並不是爲我填充錯誤，而是在沒有加載頁面的情況下。<html:errors>不起作用
附上我的代碼：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"struts-config_1_2.dtd">
<struts-config>
<display-name>CSV File Upload</display-name>
<description>CSV File Upload</description>
<form-beans>
<form-bean name="FileUploadForm"
type="example.struts.FileUploadForm">
</form-bean>
</form-beans>
<action-mappings>
<action path="/uploadfile"
input="/jsp/index.jsp"
name="FileUploadForm"
validate="true"
scope="request"
type="example.struts.FileUploadAction">
<forward name="failure" path="/jsp/error.jsp" />
<forward name="success" path="/jsp/uploadsuccess.jsp" />
</action>
</action-mappings>
<message-resources parameter="resources.MessageResources" />
</struts-config>
這是index.jsp的：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Home</title>
</head>
<body>
<h2>File upload</h2>
<html:errors />
<html:form action="uploadfile.do" enctype="multipart/form-data" method="POST">
<html:file property="file" />
<br/>
<html:submit value="Upload" />
</html:form>
</body>
</html>
這是Action類：
package example.struts;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.upload.FormFile;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.StringTokenizer;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
*
* @author Sean C. Sullivan
*
*
*
*/
public class FileUploadAction extends Action
{
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception
{
System.out.println("Hello");
FileUploadForm uploadForm = (FileUploadForm) form;
FormFile file = uploadForm.getFile();
ActionForward forward = null;
try
{
CommonUtility utility = new Utility();
utility.parseCSV(file);
forward = mapping.findForward(Forward.KEY_SUCCESS);
}
finally
{
file.destroy();
}
return forward;
}
}
這是形式：
package example.struts;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.upload.FormFile;
import javax.servlet.http.HttpServletRequest;
/**
*
* @author Sean C. Sullivan
*
*/
public class FileUploadForm extends ActionForm
{
private FormFile file;
public void setFile(FormFile f)
{
this.file = f;
}
public FormFile getFile()
{
return this.file;
}
public void reset(ActionMapping mapping, HttpServletRequest request)
{
this.file = null;
}
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request)
{
ActionErrors errors = new ActionErrors();
if (this.getFile() == null)
{
errors.add("file", new ActionMessage("error.file.missing"));
}
else if (this.getFile().getFileName() == null)
{
errors.add("file", new ActionMessage("error.empty.filename"));
}
else if (this.getFile().getFileName().length() < 1)
{
errors.add("file", new ActionMessage("error.empty.filename"));
}
else if (this.getFile().getFileSize() < 1)
{
errors.add("file", new ActionMessage("error.file.size"));
}
else if (!this.getFile().getFileName().endsWith(".csv"))
{
errors.add("file", new ActionMessage("error.file.type"));
}
return errors;
}
public String toString()
{
return "file=" + String.valueOf(this.getFile());
}
}
所以在執行後，我上傳了一個xls文件，如果在validate方法中進行了驗證，那麼在最後一個文件中應該會失敗。它在裏面，但是當它返回到jsp時，它不顯示任何東西。
請幫忙。
感謝 薩欽
您使用的是什麼版本的Struts？ – 2010-07-08 15:52:18