Question

我试图在我的应用程序中包含一些功能，允许将CSV和XML格式的数据导入到我的数据库模式中的数据库表中。

以下是我目前编码的内容

  import java.io.FileOutputStream;

  import java.io.IOException;

  import javax.faces.bean.ManagedBean;

  import javax.faces.bean.SessionScoped;

  import javax.faces.context.ExternalContext;

  import javax.faces.context.FacesContext;

  import org.apache.myfaces.custom.fileupload.UploadedFile;

  import java.io.File;


 @ManagedBean (name="importBean")
 @SessionScoped

public class ImportBean {

private UploadedFile uploadedFile;
private String uploadedFileContents;
private String fileName;
private long fileSize;
private String fileContentType;

public UploadedFile getUploadedFile() {
    return uploadedFile;
}
public void setUploadedFile(UploadedFile uploadedFile) {
    this.uploadedFile = uploadedFile;
}
public String getUploadedFileContents() {
    return uploadedFileContents;
}
public void setUploadedFileContents(String uploadedFileContents) {
    this.uploadedFileContents = uploadedFileContents;
}
public String getFileName() {
    return fileName;
}
public void setFileName(String fileName) {
    this.fileName = fileName;
}
public long getFileSize() {
    return fileSize;
}
public void setFileSize(long fileSize) {
    this.fileSize = fileSize;
}
public String getFileContentType() {
    return fileContentType;
}
public void setFileContentType(String fileContentType) {
    this.fileContentType = fileContentType;
}



public void processFileUpload() 

{
    uploadedFileContents = null;
    FacesContext fc = FacesContext.getCurrentInstance();
    ExternalContext ec = fc.getExternalContext();
    String path = ec.getRealPath("/");

    File tempFile = null;
    FileOutputStream fos = null;

    try {

        fileName = uploadedFile.getName();
        fileName = FilenameUtils.getName(uploadedFile.getName());
        fileSize = uploadedFile.getSize();
        fileContentType = uploadedFile.getContentType();

        tempFile = new File(path + fileName);
        fos = new FileOutputStream(tempFile);
        fos.close();

        }
    catch (IOException e)
    {e.getMessage();}   
}
}

JSP的代码如下所示

    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
    <title>s16g26 File Upload</title>
    </head>
    <body>
    <f:view>

     <h:form enctype = "multipart/form-data">

     <h:outputText value = "Select a File to Upload">
     </h:outputText>
     <h:inputFile value = "#{importBean.uploadedFile}">
     </h:inputFile>

     <h:commandButton type = "submit" value = "Upload"
     action = "#{importBean.processFileUpload}">
     </h:commandButton>

     </h:form>

     </f:view>
     </body>
     </html>

执行后，我在jsp代码行上出错。

错误状态无法将类org.apache.myfaces.shared.renderkit.html.util.HttpPartWrapper@39e0b28f的{{1}}转换为接口org.apache.myfaces.shared.renderkit.html.util.HttpPartWrapper

我不知道如何解决此错误，并且在上传后，我不确定如何在数据库中动态创建表而不提及列名和列类型。任何帮助，将不胜感激。感谢。

如何在尝试使用JSF 2.2将文件上传到在线数据库时修复此错误？

0 个答案: