Struts+Hibernate实现文件存储数据库

最新推荐文章于 2026-01-07 17:24:30 发布

原创最新推荐文章于 2026-01-07 17:24:30 发布 · 829 阅读

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CC 4.0 BY-SA版权

文章标签：

#hibernate #struts #存储 #import #image #html

本文介绍使用Struts框架实现文件上传的过程，包括配置JSP页面、定义Form和JOPO类、编写DAO及Action类来处理文件的接收与数据库存储。

页面：index.jsp

要实现文件的上传必须实现:

提交方式必须为:method="post"

必须添加:enctype="multipart/form-data"

<%@ page language="java" pageEncoding="utf-8"%>

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>

<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>

<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>

<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html:html lang="true">

<head>

<html:base />

<title>index.jsp</title>

</head>

<body>

<html:form action="image.do" method="post" enctype="multipart/form-data">

<html:file property="file">

</html:file>

<br>

<html:submit value="提交"></html:submit>

</html:form>

</body>

</html:html>

Form类

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package com.struts.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;

/**

* MyEclipse Struts

* Creation date: 03-29-2008

* XDoclet definition:

* @struts.form name="imageForm"

public class ImageForm extends ActionForm {

* Generated Methods

private FormFile file; /*属性名称必须与页面<html:file property="file"> 一样且必须为FormFile类型*/

public FormFile getFile() {

return file;

}

public void setFile(FormFile file) {

this.file = file;

}

/**

* Method validate

* @param mapping

* @param request

* @return ActionErrors

public ActionErrors validate(ActionMapping mapping,

HttpServletRequest request) {

// TODO Auto-generated method stub

return null;

}

/**

* Method reset

* @param mapping

* @param request

public void reset(ActionMapping mapping, HttpServletRequest request) {

// TODO Auto-generated method stub

}

JOPO类

package com.jopo;

import java.sql.Blob;

public class Image {

private int id;

/*由于数据库中Blob为数据库中存储二进制大对象*/

private Blob image;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public Blob getImage() {

return image;

}

public void setImage(Blob image) {

this.image = image;

}

然后生成对应的xml文件

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!--

Mapping file autogenerated by MyEclipse Persistence Tools

-->

<hibernate-mapping>

</id>

</property>

</class>

</hibernate-mapping>

Dao类数据库操作

package com.dao;

import java.io.Serializable;

import org.apache.struts.upload.FormFile;

import org.hibernate.Session;

import org.hibernate.Transaction;

import com.db.HibernateSessionFactory;

import com.jopo.Image;

public class Dao {

public void save(Image image){

/**

* 实际这里对数据库操作没任何变化

* s.save(image)与s.saveOrUpdate(image)效果一样

/*通过hibernate会话工厂获取一个会话*/

Session s =HibernateSessionFactory.getSession();

/*获取事物如果加入Spring 那么这部和上一部可以省略，但现在是用Struts+Hibernate举例*/

Transaction b = s.beginTransaction();

/*存储*/

s.saveOrUpdate(image);

/*事物提交*/

b.commit();

}

Action

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

package com.struts.action;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Blob;

import java.sql.SQLException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;

import org.hibernate.Hibernate;

import com.dao.Dao;

import com.jopo.Image;

import com.struts.form.ImageForm;

/**

* MyEclipse Struts

* Creation date: 03-29-2008

* XDoclet definition:

* @struts.action path="/image" name="imageForm" input="/form/image.jsp" scope="request" validate="true"

public class ImageAction extends Action {

* Generated Methods

/**

* Method execute

* @param mapping

* @param form

* @param request

* @param response

* @return ActionForward

* @throws IOException

* @throws FileNotFoundException

* @throws SQLException

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) throws FileNotFoundException, IOException, SQLException {

ImageForm image = (ImageForm) form;

/*从页面上获取FormFile*/

FormFile f = image.getFile();

/*实例化JOPO中的im对象*/

Image im=new Image();

/*从FormFile中获取输入流*/

InputStream is=null;

is = f.getInputStream();

/*将FormFile输入流转换为Blob对象*/

Blob b = Hibernate.createBlob(is);

/*将转换后的Blob对象放入Image中*/

im.setImage(b);

/*验证文件完整性*/

System.out.println(b.length());

/*插入数据*/

Dao dao=new Dao ();

dao.save(im);

return null;

}

把核心操作写到了Action这个类中，主要用于方便阅读与理解！