java-上传文件与现实上传文件

项目结构：

项目展示：

数据库：

/*
SQLyog Ultimate v12.09 (64 bit)
MySQL - 5.5.53 : Database - fileupload
*********************************************************************
*/


/*!40101 SET NAMES utf8 */;

/*!40101 SET SQL_MODE=''*/;

/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`fileupload` /*!40100 DEFAULT CHARACTER SET utf8 */;

USE `fileupload`;

/*Table structure for table `fileupload` */

DROP TABLE IF EXISTS `fileupload`;

CREATE TABLE `fileupload` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',
  `name` varchar(255) DEFAULT NULL COMMENT '产品名称',
  `path` varchar(255) DEFAULT NULL COMMENT '产品存储路径',
  `realname` varchar(255) DEFAULT NULL COMMENT '产品描述图片真实名称',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;

/*Data for the table `fileupload` */

insert  into `fileupload`(`id`,`name`,`path`,`realname`) values (20,'jack','/2017/8/16/cfd0d04e92714dcdb08c64c9db5fa638.jpg','jklh.jpg'),(21,'小米','/2017/8/16/72ee3800c2e44679a5df17a083f7759d.jpg','timg.jpg');

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

-------------------------------

代码：

com.gordon.dao:

--ProductDao.java

package com.gordon.dao;

import java.sql.SQLException;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import com.gordon.domain.Product;
import com.gordon.utils.DataSourceUtil;

public class ProductDao {

	/**
	 * 添加产品
	 * @param product_name
	 * @param fileRealName
	 * @param saveDbPath
	 * @return
	 * @throws SQLException 
	 */
	public int addProduct(String product_name, String fileRealName, String saveDbPath) throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtil.getDataSource());
		String sql = "INSERT INTO fileupload (name,realname, path) VALUES (?, ?, ?)";
		return qr.update(sql, product_name, fileRealName, saveDbPath);
	}

	/**
	 * 
	 * @return
	 * @throws SQLException 
	 */
	public List<Product> getAllProduct() throws SQLException {
		QueryRunner qr = new QueryRunner(DataSourceUtil.getDataSource());
		String sql = "select * from fileupload";
		return qr.query(sql, new BeanListHandler<Product>(Product.class));
	}

}

com.gordon.domain:
--Product.java

package com.gordon.domain;

public class Product {
	
	private int id;
	private String name;
	private String realname;
	private String path;

	public Product() {
	}

	public int getId() {
		return id;
	}

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

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getRealname() {
		return realname;
	}

	public void setRealname(String realname) {
		this.realname = realname;
	}

	public String getPath() {
		return path;
	}

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

com.gordon.service:
--ProductService.java

package com.gordon.service;

import java.sql.SQLException;
import java.util.List;

import com.gordon.dao.ProductDao;
import com.gordon.domain.Product;

public class ProductService {

	/**
	 * 添加产品
	 * @param product_name
	 * @param fileRealName
	 * @param saveDbPath
	 * @return
	 * @throws SQLException 
	 */
	public int addProduct(String product_name, String fileRealName, String saveDbPath) throws SQLException {
		return new ProductDao().addProduct(product_name, fileRealName, saveDbPath);
	}

	/**
	 * 获取所有商品
	 * @return 
	 * @throws SQLException 
	 */
	public List<Product> getAllProduct() throws SQLException {
		return new ProductDao().getAllProduct();
	}

}

com.gordon.utils:

--DataSourceUtil.java

package com.gordon.utils;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.sql.DataSource;

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class DataSourceUtil {
	private static ComboPooledDataSource ds = new ComboPooledDataSource();

	/**
	 * 获取数据源
	 * 
	 * @return 连接池
	 */
	public static DataSource getDataSource() {
		return ds;
	}

	/**
	 * 获取连接
	 * 
	 * @return 连接
	 * @throws SQLException
	 */
	public static Connection getConnection() throws SQLException {
		return ds.getConnection();
	}

	/**
	 * 释放资源
	 * 
	 * @param conn
	 *            连接
	 * @param st
	 *            语句执行者
	 * @param rs
	 *            结果集
	 */
	public static void closeResource(Connection conn, Statement st, ResultSet rs) {
		closeResultSet(rs);
		closeStatement(st);
		closeConn(conn);
	}

	/**
	 * 释放连接
	 * 
	 * @param conn
	 *            连接
	 */
	public static void closeConn(Connection conn) {
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			conn = null;
		}

	}

	/**
	 * 释放语句执行者
	 * 
	 * @param st
	 *            语句执行者
	 */
	public static void closeStatement(Statement st) {
		if (st != null) {
			try {
				st.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			st = null;
		}

	}

	/**
	 * 释放结果集
	 * 
	 * @param rs
	 *            结果集
	 */
	public static void closeResultSet(ResultSet rs) {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			rs = null;
		}

	}
}

com.gordon.web.servlet:

--AddProductServlet.java

package com.gordon.web.servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Calendar;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

import org.apache.commons.io.IOUtils;

import com.gordon.service.ProductService;

/**
 * 添加产品
 */
@WebServlet("/addProduct")
@MultipartConfig
public class AddProductServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		request.setCharacterEncoding("utf-8");

		String product_name = request.getParameter("name");
		Part part = request.getPart("file");

		// 获取真实文件名称
		String fileRealName = this.getFileRealName(part);

		// 获取服务器上的绝对存储路径与数据库上的相对路径
		String[] savePath = this.getSavePath(request, fileRealName);

		int res = 0;
		try {
			// 上传文件
			this.uploadFile(part, savePath[0]);

			// 将数据存入数据库
			res = new ProductService().addProduct(product_name, fileRealName, savePath[1]);
		} catch (Exception e) {
			e.printStackTrace();
		}

		if (res != 1) {
			request.setAttribute("msg", "添加文件失败！");
			request.getRequestDispatcher("/error_page.jsp").forward(request, response);
		}
		
		response.sendRedirect(request.getContextPath() + "/showProduct");
	}

	/**
	 * 获取保存路径 [0] 服务器存储路径 [1]数据库存储路径
	 * 
	 * @param request
	 * @param fileRealName
	 * @return
	 */
	private String[] getSavePath(HttpServletRequest request, String fileRealName) {
		// 获取存储时的随机产品名称
		String randomFilePath = this.getRandomFileName(fileRealName);

		// 获取存储绝对路径
		String savepath = request.getServletContext().getRealPath("/upload");
		// 获取存储目录 如：/2017/12/23/ 2017-12-23
		String savedir = this.getSaveDir();

		// 最终存储路径
		String saveWebPosition = savepath + savedir;
		String saveDbPosition = savedir;

		// 服务器文件夹不存在则创建
		File file = new File(saveWebPosition);
		if (!file.exists()) {
			file.mkdirs();
		}

		String[] res = { saveWebPosition + randomFilePath, saveDbPosition + randomFilePath };
		return res;
	}

	/**
	 * 获取存储目录
	 * 
	 * @return
	 */
	private String getSaveDir() {
		Calendar now = Calendar.getInstance();
		int year = now.get(Calendar.YEAR);
		int month = now.get(Calendar.MONTH) + 1;
		int day = now.get(Calendar.DAY_OF_MONTH);

		return ("/" + year + "/" + month + "/" + day + "/").toString();
	}

	/**
	 * 获取上传文件名称
	 * 
	 * @param part
	 * @return
	 */
	private String getFileRealName(Part part) {
		String contentDisposition = part.getHeader("Content-Disposition");
		String filerealname = contentDisposition.substring(contentDisposition.lastIndexOf("filename="));
		return filerealname.substring(10, filerealname.length() - 1);
	}

	/**
	 * 上传文件
	 * 
	 * @param part
	 */
	private void uploadFile(Part part, String saveWebPath) throws Exception {
		InputStream is = part.getInputStream();
		FileOutputStream os = new FileOutputStream(saveWebPath);

		IOUtils.copy(is, os);

		is.close();
		os.close();

		part.delete();
	}

	/**
	 * 获取随机产品名称
	 * 
	 * @param part
	 * @return
	 */
	private String getRandomFileName(String fileRealName) {
		String fileSuffix = fileRealName.substring(fileRealName.lastIndexOf("."));
		String randomName = UUID.randomUUID().toString().replace("-", "").toLowerCase();
		return randomName + fileSuffix;
	}
}

--ShowProductServlet.java

package com.gordon.web.servlet;

import java.io.IOException;
import java.sql.SQLException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.gordon.domain.Product;
import com.gordon.service.ProductService;

/**
 * 展示数据
 */
@WebServlet("/showProduct")
public class ShowProductServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		List<Product> list = null;
		try {
			list = new ProductService().getAllProduct();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
		request.setAttribute("list", list);
		request.getRequestDispatcher("/show_product.jsp").forward(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}
}

c3p0-config.xml

<c3p0-config>
	<!-- 默认配置，如果没有指定则使用这个配置 -->
	<default-config>
		<!-- 基本配置 -->
		<property name="driverClass">com.mysql.jdbc.Driver</property>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/fileupload</property>
		<property name="user">root</property>
		<property name="password">root</property>
	
		<!--扩展配置-->
		<property name="checkoutTimeout">30000</property>
		<property name="idleConnectionTestPeriod">30</property>
		<property name="initialPoolSize">10</property>
		<property name="maxIdleTime">30</property>
		<property name="maxPoolSize">100</property>
		<property name="minPoolSize">10</property>
		<property name="maxStatements">200</property>
	</default-config> 
	
	
	<!-- 命名的配置 -->
	<named-config name="itcast">
		<property name="driverClass">com.mysql.jdbc.Driver</property>
		<property name="jdbcUrl">jdbc:mysql://127.0.0.1:3306/xxxx</property>
		<property name="user">root</property>
		<property name="password">1234</property>
		
		
		<!-- 如果池中数据连接不够时一次增长多少个 -->
		<property name="acquireIncrement">5</property>
		<property name="initialPoolSize">20</property>
		<property name="minPoolSize">10</property>
		<property name="maxPoolSize">40</property>
		<property name="maxStatements">20</property>
		<property name="maxStatementsPerConnection">5</property>
	</named-config>
</c3p0-config> 

-------------------------------

add_product.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="${ pageContext.request.contextPath }/addProduct" method="post"
		enctype="multipart/form-data">
		<table>
			<tr>
				<td>产品名称：</td>
				<td><input type="text" name="name" /></td>
			</tr>
			<tr>
				<td>产品图片：</td>
				<td><input type="file" name="file" /></td>
			</tr>
			<tr>
				<td colspan="2"><input type="submit" value="添加产品" /></td>
			</tr>
		</table>
	</form>
</body>
</html>

error_page.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	${ msg }
</body>
</html>

index.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<a href="${ pageContext.request.contextPath }/add_product.jsp">添加产品</a>
</body>
</html>

show_product.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<table border="1">
		<tr>
			<td>id</td>
			<td>产品名称</td>
			<td>产品展示</td>
		</tr>

		<c:forEach var="p" items="${ list }">
			<tr>
				<td>${ p.id }</td>
				<td>${ p.name }</td>
				<td><img alt="" width="100" height="100" src="${ pageContext.request.contextPath}/upload${ p.path }"></td>
			</tr>
		</c:forEach>

	</table>
</body>
</html>