Java实现Excel导入数据库，数据库中的数据导入到Excel

实现的功能：

• Java实现Excel导入数据库，如果存在就更新
• 数据库中的数据导入到Excel

1、添加jxl.jar mysql-connector-java.1.7-bin.jar包到项目的lib目录下­

2、Excel文件目录:D://book.xls

3、数据库名：javenforexcel

4、表名:stu

5、编写类：连接mysql的字符串方法、插入的方法、实体类­­

表结构如下 ：

 表的实体如下：

连接数据库的工具类

package com.javen.db;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class DBhepler {
    /*String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    String url = "jdbc:sqlserver://127.0.0.1;DatabaseName=javenforexcel";*/
    
    String driver = "com.mysql.jdbc.Driver";
    String url = "jdbc:mysql://127.0.0.1:3306/javenforexcel";
    
    
    Connection con = null;
    ResultSet res = null;

    public void DataBase() {
            try {
                Class.forName(driver);
                con = DriverManager.getConnection(url, "root", "root");
            } catch (ClassNotFoundException e) {
                // TODO Auto-generated catch block
                  System.err.println("装载 JDBC/ODBC 驱动程序失败。" );  
                e.printStackTrace();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                System.err.println("无法连接数据库" ); 
                e.printStackTrace();
            }
    }

    // 查询
    public ResultSet  Search(String sql, String str[]) {
        DataBase();
        try {
            PreparedStatement pst =con.prepareStatement(sql);
            if (str != null) {
                for (int i = 0; i < str.length; i++) {
                    pst.setString(i + 1, str[i]);
                }
            }
            res = pst.executeQuery();

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return res;
    }

    // 增删修改
    public int AddU(String sql, String str[]) {
        int a = 0;
        DataBase();
        try {
            PreparedStatement pst = con.prepareStatement(sql);
            if (str != null) {
                for (int i = 0; i < str.length; i++) {
                    pst.setString(i + 1, str[i]);
                }
            }
            a = pst.executeUpdate();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return a;
    }

}

 
表的实体如下：


package com.javen.entity;

/**
 * @author Javen
 * @Email zyw205@gmail.com
 * 
 */
public class StuEntity {
    private int id;
    private String name;
    private String sex;
    private int num;
    
    
    
    public StuEntity() {
    }
    public StuEntity(int id, String name, String sex, int num) {
        this.id = id;
        this.name = name;
        this.sex = sex;
        this.num = num;
    }
    
    @Override
    public String toString() {
        return "StuEntity [id=" + id + ", name=" + name + ", sex=" + sex
                + ", num=" + num + "]";
    }
    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 getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public int getNum() {
        return num;
    }
    public void setNum(int num) {
        this.num = num;
    }
    
    
    
    
}

Java实现Excel导入数据核心类 读取Excel表中所有的数据、操作数据（查询、更新）

数据的数据导入到Excel表

Excel表中的数据导入到MySql数据库

复制代码
package com.javen.excel;

import java.util.List;

import com.javen.db.DBhepler;
import com.javen.entity.StuEntity;
import com.javen.service.StuService;

/**
 * @author Javen
 * @Email zyw205@gmail.com
 * 
 */
public class TestExcelToDb {
    public static void main(String[] args) {
        //得到表格中所有的数据
        List<StuEntity> listExcel=StuService.getAllByExcel("d://book.xls");
        /*//得到数据库表中所有的数据
        List<StuEntity> listDb=StuService.getAllByDb();*/
        
        DBhepler db=new DBhepler();
        
        for (StuEntity stuEntity : listExcel) {
            int id=stuEntity.getId();
            if (!StuService.isExist(id)) {
                //不存在就添加
                String sql="insert into stu (name,sex,num) values(?,?,?)";
                String[] str=new String[]{stuEntity.getName(),stuEntity.getSex(),stuEntity.getNum()+""};
                db.AddU(sql, str);
            }else {
                //存在就更新
                String sql="update stu set name=?,sex=?,num=? where id=?";
                String[] str=new String[]{stuEntity.getName(),stuEntity.getSex(),stuEntity.getNum()+"",id+""};
                db.AddU(sql, str);
            }
        }
    }
}

转自：http://www.cnblogs.com/zyw-205520/p/3762954.html

源代码下载地址 http://download.csdn.net/detail/zyw_java/7430807