基于tomcat使用servlet实现写入excel文件中的数据到数据库

如上图，想把excel表里的内容存入数据库对应的地方（通过前端导入excel表，自动写入）

（利用servlet实现）

ImportMsg.java代码：

package interfaceServlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Iterator;
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 jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import databaseOrm.DatabaseOperation;

/**
 * Servlet implementation class ImportMsg
 */
@WebServlet("/ImportMsg")
public class ImportMsg extends HttpServlet {
    private static final long serialVersionUID = 1L;

    // JDBC 驱动名及数据库 URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost:3306/sx";

    // 数据库的用户名与密码，需要根据自己的设置
    static final String USER = "root";
    static final String PASS = "******";//此处为自己数据库的密码

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

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

        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);

        java.sql.Connection conn = null;
        java.sql.Statement stmt = null;
        try {
            // 注册 JDBC 驱动器
            Class.forName("com.mysql.jdbc.Driver");
            // 打开一个连接
            conn = DriverManager.getConnection(DB_URL, USER, PASS);
            // 执行 SQL 查询
            stmt = conn.createStatement();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }

        try {
            List items = upload.parseRequest(request);
            InputStream is = null;
            Iterator iter = items.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();
                if (!item.isFormField()) {
                    is = item.getInputStream();
                }
            }
            Workbook workbook = Workbook.getWorkbook(is);
            Sheet sheet = workbook.getSheet(0);
            // 行数
            int rows = sheet.getColumns();
            // 列数
            int columns = sheet.getColumns();

            PreparedStatement ps = conn
                    .prepareStatement("insert into students(sid,sname,ssex,stelephone) values(?,?,?,?)");

            for (int i = 0; i < rows; i++) {
                if (i == 0) {// 第一行是属性，不读取
                    continue;
                }
                Cell ce0 = ((jxl.Sheet) sheet).getCell(0, i);
                Cell ce1 = ((jxl.Sheet) sheet).getCell(1, i);
                Cell ce2 = ((jxl.Sheet) sheet).getCell(2, i);
                Cell ce3 = ((jxl.Sheet) sheet).getCell(3, i);

                String c0 = ce0.getContents();
                String c1 = ce1.getContents();
                String c2 = ce2.getContents();
                String c3 = ce3.getContents();

                ps.setString(1, c0);
                ps.setString(2, c1);
                ps.setString(3, c2);
                ps.setString(4, c3);
                ps.execute();
            }
            ps.close();
            conn.close();
            response.sendRedirect("ImportMsgSuccess.html");// 重定向到成功插入学生数据的页面
        } catch (FileUploadException e) {
            e.printStackTrace();
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

前端ImportMsg.html代码：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="ImportMsg" enctype="multipart/form-data" method="post">
     选择文件： <input type="file" name="excelfilename"><br>
     <input type="submit" value="数据入库"/>
</form>
</body>
</html>

效果：