上传文件，路径存储在数据库jsf中

Question

我使用jsf 2上传文件，首先我将文件上传到系统目录中，然后尝试将路径与其他信息存储到数据库中，我的卡住是，当提交我上传文件成功时，找到它在正确的位置，找到其他信息如描述，文件名…在数据库中，但找不到路径。这是我管理的bean:

package mbeans;
    import java.io.File;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.net.URL;
    import java.util.List;
    import javax.faces.bean.ManagedBean;
    import javax.faces.bean.RequestScoped;
    import javax.faces.bean.SessionScoped;
    import javax.faces.context.ExternalContext;
    import javax.faces.context.FacesContext;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.Part;
    import daoImpl.DocDAO;
    import entities.Document;
    @ManagedBean
    @RequestScoped
    public class DocBean {
        public DocDAO docDAO;
        private Part file;
        private  String titreDocument;
        private  String descriptionDocument;
        private  String lien;
        private  String dateMise;
        private String Categorie;
        private String chemin;
        private String sousCategorie;
        private Integer idDocument;
        public DocBean(){
            docDAO=new DocDAO();
        }
        public String upload() throws IOException{
        file.write(getFilename(file));
        docDAO.createDoc(idDocument, titreDocument, descriptionDocument, sousCategorie, Categorie, chemin, dateMise, lien);
        idDocument=null;
        titreDocument="";
        descriptionDocument="";
        lien="";
        sousCategorie="";
        dateMise="";
        Categorie="";
        chemin +="C:\data\" ;
        try{
     File afile =new File("C:\Users\free\Desktop\glassfish-4.0\glassfish4\glassfish\domains\domain1\generated\jsp\copy2mavenTest1111\"+ getFilename(file));
           if(afile.renameTo(new File("C:\data\" +getFilename(file) ))){
            System.out.println("File is moved successful!");
           }else{
            System.out.println("File is failed to move!");
           }
        }catch(Exception e){
            e.printStackTrace();
        }
            return"succes";
        }
        private static String getFilename(Part part){
            for(String cd: part.getHeader("Content-Disposition").split(";")){
                if(cd.trim().startsWith("filename")){
                    String filename=cd.substring(cd.indexOf('=')+1).trim().replace(""", "");
                    return filename.substring(filename.lastIndexOf('/')+1).substring(filename.lastIndexOf('\')+1);
                }
            }
            return null;
        }

        public List<Document> getAlldoc(){
            return docDAO.getAllDoc();
            }
        public String getSousCategorie() {
            return sousCategorie;
        }
        public void setSousCategorie(String sousCategorie) {
            this.sousCategorie = sousCategorie;
        }
        public String getTitreDocument() {
            return titreDocument;
        }
        public void setTitreDocument(String titreDocument) {
            this.titreDocument = titreDocument;
        }
        public String getDescriptionDocument() {
            return descriptionDocument;
        }
        public void setDescriptionDocument(String descriptionDocument) {
            this.descriptionDocument = descriptionDocument;
        }
        public String getDateMise() {
            return dateMise;
        }
        public Integer getIdDocument() {
            return idDocument;
        }
        public void setIdDocument(Integer idDocument) {
            this.idDocument = idDocument;
        }
        public void setDateMise(String dateMise) {
            this.dateMise = dateMise;
        }
        public String getCategorie() {
            return Categorie;
        }
        public void setCategorie(String categorie) {
            Categorie = categorie;
        }
        public String getLien() {
            return lien;
        }
        public void setLien(String lien) {
            this.lien = lien;
        }

        public Part getFile() {
            return file;
        }
        public void setFile(Part file) {
            this.file = file;
        }
        public String getChemin() {
            return chemin;
        }
        public void setChemin(String chemin) {
            this.chemin = chemin;
        }
    }

my dao，用于在数据库中存储有关文件的信息:

    package daoImpl;
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import entities.Document;
@Stateless
public class DocDAO {
    private static EntityManager em;
    private static EntityManagerFactory factory;

    public DocDAO() {
        if(factory==null)
            factory=Persistence.createEntityManagerFactory("mavenTest");
        if(em==null)
            em=factory.createEntityManager();
    }
    public List<Document> getAllDoc() {
        List<Document> listeDoc;
        Query q;
        em.getTransaction().begin();
        q=em.createQuery("select d from Document d ORDER BY d.dateMise");
        listeDoc = q.getResultList();
        em.getTransaction().commit();
        return listeDoc ;
    }
   public void createDoc(Integer idDocument, String titreDocument, 
            String descriptionDocument, String sousCategorie
            , String Categorie, String chemin, String dateMise, String lien) {
        em.getTransaction().begin();
        Document f =new Document();
        f.setIdDocument(idDocument);
        f.setDateMise(dateMise);
        f.setDescriptionDocument(descriptionDocument);
        f.setLien(lien);
        f.setTitreDocument(titreDocument);
        f.setCategorie(Categorie);
        f.setSousCategorie(sousCategorie);  
        em.persist(f);
        em.getTransaction().commit();
    }
}

最后是XHTML页面:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core">
<head></head>
<body>
 <h3>ajouter un nouveau document </h3><br/>
    <h:form enctype="multipart/form-data" id="form1">
        <h:outputText value="Nom du document"> </h:outputText>
        <h:inputText value="#{docBean.titreDocument}"></h:inputText><br/>
        <h:outputText  value="description"></h:outputText>
        <h:inputText value="#{docBean.descriptionDocument}"></h:inputText><br/>
        <h:outputText  value="chemin"></h:outputText>
        <h:inputHidden value="#{docBean.chemin}"></h:inputHidden><br/> 
        <h:outputText  value="Date de la mise "></h:outputText>
        <h:inputText value="#{docBean.dateMise}"></h:inputText><br/>
        <h:outputText  value="Lien"></h:outputText>
        <h:inputText value="#{docBean.lien}"></h:inputText><br/>
        <h:outputText  value="Catégorie"></h:outputText>
        <h:inputText value="#{docBean.categorie}"></h:inputText><br/>
        <h:outputText  value="sous catégorie"> </h:outputText>
        <h:inputText value="#{docBean.sousCategorie}"></h:inputText><br/>
        <h:outputText> télécharger le document</h:outputText>
        <h:inputFile value="#{docBean.file}"></h:inputFile><br/>
        <h:commandButton value="valider" action="#{docBean.upload}"/>
    </h:form>
</body>                   
</html>

谢谢。

Answer 1

我在DocDAO类中没有看到任何f.setChemin(chemin)。这可能是问题，如果路径没有设置在您的实体的其他地方。