java将excel导入数据库（java操作excel直接导入数据库）

由于篇幅有限，csdn的上传在60M内，jar包加起来就超过了，这里只保存了关键的源代码，想要详细的源代码可以私信我。

一、介绍一下我们的这个程序的流程

软件环境，win7 Myeclipse MySQL tomcat

测试浏览器：火狐

其他：jQuery bootstrap poi

二、首先看一下包的导入，这里引用下他人的文章内容(jar包下载)

项目结构

java将excel导入数据库,java操作excel直接导入数据库(1)

三、我们对上面的五个文件开始写吧。

DbUtil.java

package com.app.util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import com.app.common.Common; import com.app.po.Student_1; public class DbUtil { /** * @param sql */ public static void insert(String sql, Student_1 student) throws SQLException { Connection conn = null; PreparedStatement ps = null; try { Class.forName(Common.DRIVER); conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD); ps = conn.prepareStatement(sql); ps.setString(1, student.getNo()); ps.setString(2, student.getName()); ps.setString(3, student.getAge()); ps.setString(4, String.valueOf(student.getScore())); boolean flag = ps.execute(); if(!flag){ System.out.println("Save data : No. = " student.getNo() " , Name = " student.getName() ", Age = " student.getAge() " succeed!"); } } catch (Exception e) { e.printStackTrace(); } finally { if (ps != null) { ps.close(); } if (conn != null) { conn.close(); } } } @SuppressWarnings({ "unchecked", "rawtypes" }) public static List selectOne(String sql, Student_1 student) throws SQLException { Connection conn = null; PreparedStatement ps = null; ResultSet rs = null; List list = new ArrayList(); try { Class.forName(Common.DRIVER); conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD); ps = conn.prepareStatement(sql); rs = ps.executeQuery(); while(rs.next()){ if(rs.getString("no").equals(student.getNo()) || rs.getString("name").equals(student.getName())|| rs.getString("age").equals(student.getAge())){ list.add(1); }else{ list.add(0); } } } catch (Exception e) { e.printStackTrace(); } finally { if (rs != null) { rs.close(); } if (ps != null) { ps.close(); } if (conn != null) { conn.close(); } } return list; } public static ResultSet selectAll(String sql) throws SQLException { Connection conn = null; PreparedStatement ps = null; ResultSet rs = null; try { Class.forName(Common.DRIVER); conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD); ps = conn.prepareStatement(sql); rs = ps.executeQuery(); } catch (Exception e) { e.printStackTrace(); } finally { if (rs != null) { rs.close(); } if (ps != null) { ps.close(); } if (conn != null) { conn.close(); } } return rs; } }

student.java

package com.app.po; public class Student_1 { /** * id */ private Integer id; /** * 学号 */ private String no; /** * 姓名 */ private String name; /** * 学院 */ private String age; /** * 成绩 */ private String score; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getNo() { return no; } public void setNo(String no) { this.no = no; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getScore() { return score; } public void setScore(String score) { this.score = score; } }

common.java

package com.app.common; public class Common { // connect the database public static final String DRIVER = "com.mysql.jdbc.Driver"; public static final String DB_NAME = "test"; public static final String USERNAME = "root"; public static final String PASSWORD = "123456"; public static final String IP = "localhost"; public static final String PORT = "3306"; public static final String URL = "jdbc:mysql://" IP ":" PORT "/" DB_NAME; // common public static final String EXCEL_PATH = "lib/student_info.xls"; // sql public static final String INSERT_STUDENT_SQL = "insert into t_student(no, name, age, score) values(?, ?, ?, ?)"; public static final String UPDATE_STUDENT_SQL = "update t_student set no = ?, name = ?, age= ?, score = ? where id = ? "; public static final String SELECT_STUDENT_ALL_SQL = "select id,no,name,age,score from t_student"; public static final String SELECT_STUDENT_SQL = "select * from t_student where name like "; } readExcel.java package com.app.excel; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import com.app.common.Common; import com.app.po.Student_1; public class ReadExcel { public List<Student_1> readXls(String path) throws IOException { InputStream is = new FileInputStream(path); HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is); Student_1 student = null; List<Student_1> list = new ArrayList<Student_1>(); // 循环工作表Sheet for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet ) { HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet); if (hssfSheet == null) { continue; } // 循环行Row for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum ) { HSSFRow hssfRow = hssfSheet.getRow(rowNum); if (hssfRow != null) { student = new Student_1(); HSSFCell no = hssfRow.getCell(0); HSSFCell name = hssfRow.getCell(1); HSSFCell age = hssfRow.getCell(2); HSSFCell score = hssfRow.getCell(3); student.setNo(getValue(no)); student.setName(getValue(name)); student.setAge(getValue(age)); student.setScore(getValue(score)); list.add(student); } } } return list; } @SuppressWarnings("static-access") private String getValue(HSSFCell hssfCell) { if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) { // 返回布尔类型的值 return String.valueOf(hssfCell.getBooleanCellValue()); } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) { // 返回数值类型的值 return String.valueOf(hssfCell.getNumericCellValue()); } else { // 返回字符串类型的值 return String.valueOf(hssfCell.getStringCellValue()); } } }

saveDB.java

package com.app.excel; import java.io.IOException; import java.sql.SQLException; import java.util.List; import com.app.common.Common; import com.app.util.DbUtil; import com.app.po.Student_1; public class SaveData2DB { @SuppressWarnings({ "rawtypes" }) public void save(String path) throws IOException, SQLException { ReadExcel xlsMain = new ReadExcel(); Student_1 student = null; List<Student_1> list = xlsMain.readXls(path); for (int i = 0; i < list.size(); i ) { student = list.get(i); List l = DbUtil.selectOne(Common.SELECT_STUDENT_SQL "'%" student.getName() "%'", student); if (!l.contains(1)) { DbUtil.insert(Common.INSERT_STUDENT_SQL, student); } else { System.out.println("The Record was Exist : No. = " student.getNo() " , Name = " student.getName() ", Age = " student.getAge() ", and has been throw away!"); } } } }

Upload.java

package com.app.action; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.HashMap; import java.util.List; import java.util.UUID; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletrequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadBase; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.adtec.framework.common.util.JsonUtil; import com.app.excel.SaveData2DB; import net.sf.json.JSONObject; public class UpLoad extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; private final Logger logger = LoggerFactory.getLogger(this.getClass()); public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("coming......."); //得到上传文件的保存目录，将上传的文件存放于WEB-INF目录下，不允许外界直接访问，保证上传文件的安全 String savePath = this.getServletContext().getRealPath("/WEB-INF/upload"); //上传时生成的临时文件保存目录 String tempPath = this.getServletContext().getRealPath("/WEB-INF/temp"); File tmpFile = new File(tempPath); if (!tmpFile.exists()) { //创建临时目录 tmpFile.mkdir(); } //消息提示 String message = ""; try{ //使用Apache文件上传组件处理文件上传步骤： //1、创建一个DiskFileItemFactory工厂 DiskFileItemFactory factory = new DiskFileItemFactory(); //设置工厂的缓冲区的大小，当上传的文件大小超过缓冲区的大小时，就会生成一个临时文件存放到指定的临时目录当中。 factory.setSizeThreshold(1024*100);//设置缓冲区的大小为100KB，如果不指定，那么缓冲区的大小默认是10KB //设置上传时生成的临时文件的保存目录 factory.setRepository(tmpFile); //2、创建一个文件上传解析器 ServletFileUpload upload = new ServletFileUpload(factory); //监听文件上传进度 /*upload.setProgressListener(new ProgressListener(){ public void update(long pBytesRead, long pContentLength, int arg2) { System.out.println("文件大小为：" pContentLength ",当前已处理：" pBytesRead); } });*/ //解决上传文件名的中文乱码 upload.setHeaderEncoding("UTF-8"); //3、判断提交上来的数据是否是上传表单的数据 if(!ServletFileUpload.isMultipartContent(request)){ //按照传统方式获取数据 return; } //设置上传单个文件的大小的最大值，目前是设置为1024*1024字节，也就是1MB upload.setFileSizeMax(1024*1024); //设置上传文件总量的最大值，最大值=同时上传的多个文件的大小的最大值的和，目前设置为10MB upload.setSizeMax(1024*1024*10); // //4、使用ServletFileUpload解析器解析上传数据，解析结果返回的是一个List<FileItem>集合，每一个FileItem对应一个Form表单的输入项 List<FileItem> list = upload.parseRequest(request); for(FileItem item : list){ //如果fileitem中封装的是普通输入项的数据 if(item.isFormField()){ String name = item.getFieldName(); //解决普通输入项的数据的中文乱码问题 String value = item.getString("UTF-8"); // String value = item.getString("gbk"); //value = new String(value.getBytes("iso8859-1"),"UTF-8"); System.out.println(name "=" value); }else{//如果fileitem中封装的是上传文件 //得到上传的文件名称， String filename = item.getName(); System.out.println(filename ".."); if(filename==null || filename.trim().equals("")){ continue; } //注意：不同的浏览器提交的文件名是不一样的，有些浏览器提交上来的文件名是带有路径的，如： c:\a\b\1.txt，而有些只是单纯的文件名，如：1.txt //处理获取到的上传文件的文件名的路径部分，只保留文件名部分 filename = filename.substring(filename.lastIndexOf("\\") 1); //得到上传文件的扩展名 String fileExtName = filename.substring(filename.lastIndexOf(".") 1); //如果需要限制上传的文件类型，那么可以通过文件的扩展名来判断上传的文件类型是否合法 System.out.println("上传的文件的扩展名是：" fileExtName); //获取item中的上传文件的输入流 InputStream in = item.getInputStream(); //得到文件保存的名称 String saveFilename = makeFileName(filename); //得到文件的保存目录 String realSavePath = makePath(saveFilename, savePath); //创建一个文件输出流 FileOutputStream out = new FileOutputStream(realSavePath "\\" saveFilename); //创建一个缓冲区 byte buffer[] = new byte[1024]; //判断输入流中的数据是否已经读完的标识 int len = 0; StringBuffer sb = new StringBuffer(); //循环将输入流读入到缓冲区当中，(len=in.read(buffer))>0就表示in里面还有数据 while((len=in.read(buffer))>0){ //使用FileOutputStream输出流将缓冲区的数据写入到指定的目录(savePath "\\" filename)当中 // System.out.println(realSavePath); // System.out.println(); sb.append(new String(buffer,0,len)); // logger.info(sb.toString()); // System.out.println(sb.toString()); // sb.setLength(0); out.write(buffer, 0, len); } // System.out.println(sb.toString() "-----"); String ss = sb.toString(); // System.out.println(sb.); //关闭输入流 in.close(); //关闭输出流 out.close(); //删除处理文件上传时生成的临时文件 //item.delete(); SaveData2DB saveData2DB = new SaveData2DB(); saveData2DB.save(realSavePath "\\" saveFilename); System.out.println("end"); message = "success"; } } }catch (FileUploadBase.FileSizeLimitExceededException e) { e.printStackTrace(); message = "单个文件超出最大值！！！"; /*request.setAttribute("message", "单个文件超出最大值！！！");*/ /* request.getRequestDispatcher("/message.jsp").forward(request, response);*/ return; }catch (FileUploadBase.SizeLimitExceededException e) { e.printStackTrace(); message = "上传文件的总的大小超出限制的最大值！！！"; /*request.setAttribute("message", "上传文件的总的大小超出限制的最大值！！！");*/ /*request.getRequestDispatcher("/message.jsp").forward(request, response);*/ return; }catch (Exception e) { message= "文件上传失败！"; e.printStackTrace(); } /*request.setAttribute("message",message);*/ returnResultJson(response,message); /*request.getRequestDispatcher("/message.jsp").forward(request, response);*/ } private String makeFileName(String filename){ //2.jpg //为防止文件覆盖的现象发生，要为上传文件产生一个唯一的文件名 return UUID.randomUUID().toString() "_" filename; } private String makePath(String filename,String savePath){ //得到文件名的hashCode的值，得到的就是filename这个字符串对象在内存中的地址 int hashcode = filename.hashCode(); int dir1 = hashcode&0xf; //0--15 int dir2 = (hashcode&0xf0)>>4; //0-15 //构造新的保存目录 String dir = savePath "\\" dir1 "\\" dir2; //upload\2\3 upload\3\5 //File既可以代表文件也可以代表目录 File file = new File(dir); //如果目录不存在 if(!file.exists()){ //创建目录 file.mkdirs(); } return dir; } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } private void returnResultJson(HttpServletResponse response,Object obj) { PrintWriter pw = null; try { pw = response.getWriter(); JSONObject resultmessage = JsonUtil.generate(obj); response.setCharacterEncoding("UTF-8"); response.setContentType("application/json"); response.setHeader("Cache-Control", "no-cache"); pw.write(resultmessage.toString()); } catch (Exception e) { pw.write("系统异常，请联系管理员"); } finally { pw.flush(); pw.close(); } } }

Web.xml

<servlet> <servlet-name>Upload</servlet-name> <servlet-class>com.app.action.UpLoad</servlet-class> </servlet> <servlet-mapping> <servlet-name>Upload</servlet-name> <url-pattern>/fileUpload/UploadServlet</url-pattern> </servlet-mapping>

以上就是配置后台文件

现在配置jsp页面吧(jquery),这样的页面插件很多，可以网上搜索你喜欢的。

<div class="htmleaf-container"> <div class="container kv-main">   <input id="fileUpload" class="file" type="file" name="fileUpload" multiple data-show-preview="true">  </div> </div> <script> $("#fileUpload").fileinput({ language : "zh",//设置语言 uploadUrl: "${pageContext.request.contextPath}/fileUpload/UploadServlet",//上传地址 uploadAsync: true,//同步还是异步 showCaption:false,//是否显示标题 showUpload: true,//是否显示上传按钮 browseClass: "btn btn-primary", //按钮样式 allowedFileExtensions : ['jpg', 'png','gif','xls'],//接收的文件后缀 allowedFileTypes: ['image', 'video', 'flash','excel'],//接收的文件类型['image', 'html', 'text', 'video', 'audio', 'flash','object'] maxFileCount: 6,//最大上传文件数限制 overwriteInitial: false, maxFileSize: 1000, msgFilesTooMany: "选择上传的文件数量({n}) 超过允许的最大数值{m}！", previewFileIcon: '<i class="glyphicon glyphicon-file"></i>', enctype: 'multipart/form-data', /* allowedPreviewTypes: null, */ previewFileIconSettings: { 'docx': '<i class="glyphicon glyphicon-file"></i>', 'xlsx': '<i class="glyphicon glyphicon-file"></i>', 'pptx': '<i class="glyphicon glyphicon-file"></i>', 'jpg': '<i class="glyphicon glyphicon-picture"></i>', 'pdf': '<i class="glyphicon glyphicon-file"></i>', 'zip': '<i class="glyphicon glyphicon-file"></i>' } });

四、源文件已经也好了，开始运行吧。

浏览器选择文件，点击会显示上传进度。

java将excel导入数据库,java操作excel直接导入数据库(2)