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/ 2017-12-23String 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>

转载于:https://www.cnblogs.com/hfultrastrong/p/7374065.html