Question

我正在尝试使用hibernate和spring在mysql数据库中上传图像 ajax调用在createImge.jsp页面中完成，并提供控制器来处理请求，其中图像绝对路径存储在变量中，并将整个实体对象传递给daoImpl类，其中hibernate程序用于存储在数据库中。

我没有收到任何错误，但问题是它没有插入到数据库中并且收到的警报未从ajax插入，即使在控制台上也没有错误。

请为此提供任何解决方案。

CreateImge.jsp

       <html>
       <body>
       <form class="form-horizontal bucket-form" id="myform" method="post" >
               <div class="control-label text-center">
               <p class="required"><em>required fields</em></p></div>

                <div class="form-group"> 
                    <label class="col-sm-3 control-label">ID</label>
                    <div class="col-sm-6">
                        <input type="number" class="form-control" id="id" >
                    </div>
                    </div>


                <div class="form-group"> 
                    <label class="col-sm-3 control-label">Upload 
                  image</label>
                    <div class="col-sm-6">
                        <input type="file" class="form-control" id="path" 
             accept="image/*">
                    </div>
                </div>                  

                <div class="form-group">
                    <div class="col-lg-offset-3 col-lg-6">
                        <button class="btn btn-primary" id="speakerSubmit" 
               type="submit">Save</button>
                        <button type="reset" class="btn btn" 
              onClick="myFunction()">Reset</button>
                        <script type="text/javascript">
                            function myFunction() {
                            document.getElementById("myform").reset();
                            }
                        </script>
                    </div>
                </div>

            </form>

         <script src="js/jquery2.0.3.min.js"></script>
         <script 
   src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js">
   </script>
   <script src="js/bootstrap.js"></script><!--bootstrap script-->
   <script src="js/jquery.dcjqaccordion.2.7.js"></script><!--accordion 
   script-->
  <script src="js/scripts.js"></script><!--accordion script-->
   <script src="js/jquery.nicescroll.js"></script><!--toggle_effect script-->

  <script>
  $( document ).ready(function() {
  $("#speakerSubmit").click(function(event){
  event.preventDefault();
   alert("create ready");
   var id=document.getElementById("id").value;
   var path=document.getElementById("path").value;
   alert(path);
 var details={id:id,path:path};
 alert(details.id+" "+details.path);
 var res=JSON.stringify(details);
 alert("mytxt "+res);

  $.ajax({ 
    url: "http://localhost:8080/EMS_APP/imgadd",
    type: "POST",
    contentType:"application/json",
    data : res,
    success: function(data, status) {
        if(data){

            alert("inserted");

        }else{
        //window.open("index.jsp","_self");
            alert("not inserted");
        }
    },
     error: function(e) { 
        console.log("error");
    }  
  });
  });
  });
 </script>
 </body>
 </html>

Pojo课程

package com.ems.DO;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="forimgs")
public class ImgeClass {

@Id
@Column(name="id")
private int id;

@Column(name="path")
private String path;
public String getPath() {
    return path;
}

public void setPath(String path) {
    this.path = path;
}

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

@Column(name="imgstore")
 private byte[] image;

public byte[] getImage() {
    return image;
}

public void setImage(byte[] image) {
    this.image = image;
}
}

控制器类方法

  @RequestMapping(value="/imgadd",method=RequestMethod.POST)
  public @ResponseBody void addimage (@RequestBody ImgeClass e){
    System.out.println(e.getPath());
    speakerService.addImg(e);
}

ServiceImpl类方法

    @Override
    public void addImg(ImgeClass e) {
    System.out.println("in service");
    speakerDao.addImage(e);
    }

DaoImpl类方法

   public void addImage(ImgeClass e)
    {

    System.out.println("in dao");
    System.out.println(e.getId());
    System.out.println(e.getPath());
    String path=e.getPath();
    File file=new File(path);
    System.out.println("Your file length is "+file.length());
    byte[] bfile=new byte[(int) file.length()];
    try {

     FileInputStream fileInputStream =new FileInputStream(file);

     fileInputStream.read(bfile);
     fileInputStream.close();
     for(byte b : bfile) {     //Just to check whether bfile has any content
         System.out.print(b +" ");
     }
     }
    catch(Exception ex) {
    ex.printStackTrace();
   }
   e.setImage(bfile);
    Session session = sessionFactory.getSessionFactory().openSession();
    System.out.println(e.getId()+" "+e.getPath()+" "+e.getImage());

     session.persist(e);
    //System.out.println("value");
    System.out.println("One image uploaded into database");
     }

Image for Output in the console

Empty table in forImgs

使用spring mvc和hibernate使用ajax存储在mysql数据库中的图像

0 个答案: