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我正在尝试创建一个具有文件上传功能的网页。

文件上传.jsp

<%@taglib prefix="s" uri="/struts-tags"%>

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>file upload Page</title>
</head>
<body bgColor="lightBlue">
     <s:form action="fileUpload" method="post" enctype="multipart/form-data" >
        <s:file name="userTmp" label="File" />
        <br/>
        <s:submit value="uploadFile"/>
    </s:form>
</body>
</html>

Struts.xml

<package name="upload" namespace="/FileUpload" extends="struts-default">
        <action name="fileUpload" class="FileUploadAction">
            <result name="success">success.jsp</result>
            <result name="error">error.jsp</result>
        </action>
</package>

文件上传动作.java

public class FileUploadAction  extends ActionSupport{


    private File userTmp;

    private String userTmpContentType;

    private String userTmpFileName;


Connection conn = null;

    public String execute() throws Exception
    {
           String result = ERROR;
           try {  
               Class.forName("com.mysql.jdbc.Driver").newInstance();
               conn= DriverManager.getConnection(".....");  

               System.out.println("DATABASE CONNECTED");  
               String sql = "insert into Evidence(Filename, FileType, FileContent,DateSubmitted) values(?, ?, ?, now())";
                   PreparedStatement pstmt = conn.prepareStatement(sql);  
                   FileInputStream fis = new FileInputStream(userTmp); 
                   pstmt.setString(1, userTmpFileName);
                   pstmt.setString(2, userTmpContentType);
                   pstmt.setBinaryStream(3, fis, (int)userTmp.length()); 
                   pstmt.executeUpdate(); 
                   pstmt.close(); 
                   fis.close(); 
                   result = SUCCESS;
             }             
             catch (Exception e) {  
                 e.printStackTrace();  
             }
             finally  
             {  
                 conn.close();  
             }  

          return result;
    }

    public File getUserTmp() {
        return userTmp;
    }

    public void setUserTmp(File userTmp) {
        this.userTmp = userTmp;
    }

    public String getUserTmpContentType() {
        return userTmpContentType;
    }

    public void setUserTmpContentType(String userTmpContentType) {
        this.userTmpContentType = userTmpContentType;
    }

    public String getUserTmpFileName() {
        return userTmpFileName;
    }

    public void setUserTmpFileName(String userTmpFileName) {
        this.userTmpFileName = userTmpFileName;
    }

}

当我在本地 tomcat 服务器上运行它时，它工作正常。

但是当我将它部署在不同的 tomcat 服务器上时，它给出了这个错误：

No result defined for action FileUploadAction and result input

我尝试在 FileUploadAction 类的执行方法中不做任何事情，只返回 SUCCESS。但它抛出了同样的错误。

经过一些代码调试后，我发现这是因为 enctype="multipart/form-data"。我用不同的enctype修改了FileUpload.jsp页面并删除了<s:file>jsp页面中的标签，它没有给出任何错误。

似乎很奇怪，为什么它在我的本地 tomcat 服务器上工作，但在不同的服务器上却没有。我是否应该更改 tomcat 服务器中的任何内容以使 encype="multipart/form-data" 正常工作...

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