Java实现Excel导入数据库，数据库中的数据导入到Excel

【注意添加jxl.jar 和 数据库jar包】

package com.hp.util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

/**

* 连接数据库的工具类

* @author Wolf

*

*/

public class DBhelper {

publicfinal String DBDriver = "com.mysql.jdbc.Driver";

publicfinal String URL = "jdbc:mysql://127.0.0.1:3306/onlinexam";

Connectioncon = null;

ResultSetres = null;

publicvoid DataBase() {

try{

Class.forName(DBDriver);

con= DriverManager.getConnection(URL, "root", "123456");

}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();

}

}

// 根据Stringsql, String str[]查询返回结果集

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;

}

/*

* 方法功能：增删修改

* 如果数组str[] 不为Object类型，为某一类型（如String）。那么如果数据类型不唯一，再转换成String类型后，与sql语句整合后执行增删改操作就会抛出类型不匹配错误。

*/

public int AddU(String sql, Object str[]) {

int a = 0;

DataBase();

try {

PreparedStatement pst =con.prepareStatement(sql);

if (str != null) {

for (int i = 0; i <str.length; i++) {

pst.setObject(i + 1, str[i]);

}

}

a = pst.executeUpdate();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return a;

}

}

===============================================================================================================================

package com.hp.excel;

import java.io.File;

import java.sql.SQLException;

import java.util.List;

import com.hp.bean.Student;

import com.hp.bean.Teacher;

import com.hp.dao.StudentDao;

import com.hp.dao.TeacherDao;

import com.hp.dao.impl.StudentDaoImpl;

import com.hp.dao.impl.TeacherDaoImpl;

import jxl.Workbook;

import jxl.write.Label;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

/**

* 数据的数据导入到Excel表

*

* @author Wolf

*

*/

public class TestDbToExcel {

/*

* 创建main（）对方法进行测试

*/

publicstatic void main(String[] args) {

TestDbToExcelaa = new TestDbToExcel();

try{

aa.StudentTestDbToExcel();

System.out.println("StudentTestDbToExcel()执行完毕");

//aa.TeacherTestDbToExcel();

//System.out.println("TeacherTestDbToExcel()执行完毕");

}catch (Exception e) {

//TODO Auto-generated catch block

e.printStackTrace();

}

}

/*

* 对学生表进行操作

*/

publicvoid StudentTestDbToExcel() throws Exception {

StudentDaostudentDao = new StudentDaoImpl();

WritableWorkbookwwb = null;

//创建可写入的Excel工作簿

StringfileName = "D://onlinexam/StudentTestDbToExcel.xls";

Filefile = new File(fileName);

if(!file.exists()) {

file.createNewFile();

}

//以fileName为文件名来创建一个Workbook

wwb= Workbook.createWorkbook(file);

//创建工作表

//学生编号(stu_id)+学生姓名(stu_name)+学生密码(stu_password)+学生性别(stu_sex)+学生出生日期(stu_born)+学生所在班级(cla_id)+学生所在系别(dep_id)

WritableSheetws = wwb.createSheet("Test Shee 1", 0);

//查询数据库中所有的数据

List<Student>list = studentDao.getStudentAllByDb();

//要插入到的Excel表格的行号，默认从0开始

Labellabelstu_id = new Label(0, 0, "学生编号(stu_id)");// 表示第一列第一行

Labellabelstu_name = new Label(1, 0, "学生姓名(stu_name)");

Labellabelstu_password = new Label(2, 0, "学生密码(stu_password)");

Labellabelstu_sex = new Label(3, 0, "学生性别(stu_sex)");

Labellabelstu_born = new Label(4, 0, "学生出生日期(stu_born)");

Labellabelcla_id = new Label(5, 0, "学生所在班级(cla_id)");

Labellabeldep_id = new Label(6, 0, "学生所在系别(dep_id)");

ws.addCell(labelstu_id);

ws.addCell(labelstu_name);

ws.addCell(labelstu_password);

ws.addCell(labelstu_sex);

ws.addCell(labelstu_born);

ws.addCell(labelcla_id);

ws.addCell(labeldep_id);

for(int i = 0; i < list.size(); i++) {

LabellabelId_i = new Label(0, i + 1, list.get(i).getStu_id() + "");//String

LabellabelName_i = new Label(1, i + 1, list.get(i).getStu_name());

LabellabelPassword_i = new Label(2, i + 1, list.get(i)

.getStu_password());

LabellabelSex_i = new Label(3, i + 1, list.get(i).getStu_sex());

LabellabelBorn_i = new Label(4, i + 1, list.get(i).getStu_born()

.toString());

LabellabelClaId_i = new Label(5, i + 1, list.get(i).getCla_id()

+"");

LabellabelDepId_i = new Label(6, i + 1, list.get(i).getDep_id()

+"");

ws.addCell(labelId_i);

ws.addCell(labelName_i);

ws.addCell(labelPassword_i);

ws.addCell(labelSex_i);

ws.addCell(labelBorn_i);

ws.addCell(labelClaId_i);

ws.addCell(labelDepId_i);

}

//写进文档

wwb.write();

//关闭Excel工作簿对象

wwb.close();

}

/*

* 对教师表进行操作

*/

publicvoid TeacherTestDbToExcel() throws Exception {

TeacherDaoteacherDao = new TeacherDaoImpl();

WritableWorkbookwwb = null;

//创建可写入的Excel工作簿

StringfileName = "D://onlinexam/TeacherTestDbToExcel.xls";

Filefile = new File(fileName);

if(!file.exists()) {

file.createNewFile();

}

//以fileName为文件名来创建一个Workbook

wwb= Workbook.createWorkbook(file);

//创建工作表

//教师编号(tea_id)+教师姓名(tea_name)+教师密码(tea_password)+教师性别(tea_sex)+教师出生日期(tea_born)+教师所在系别(dep_id)

WritableSheetws = wwb.createSheet("Test Shee 1", 0);

//查询数据库中所有的数据

List<Teacher>list = teacherDao.getTeacherAllByDb();

//要插入到的Excel表格的行号，默认从0开始

Labellabeltea_id = new Label(0, 0, "教师编号(tea_id)");// 表示第一列第一行

Labellabeltea_name = new Label(1, 0, "教师姓名(tea_name)");

Labellabeltea_password = new Label(2, 0, "教师密码(tea_password)");

Labellabeltea_sex = new Label(3, 0, "教师性别(tea_sex)");

Labellabeltea_born = new Label(4, 0, "教师出生日期(tea_born)");

Labellabeldep_id = new Label(6, 0, "教师所在系别(dep_id)");

ws.addCell(labeltea_id);

ws.addCell(labeltea_name);

ws.addCell(labeltea_password);

ws.addCell(labeltea_sex);

ws.addCell(labeltea_born);

ws.addCell(labeldep_id);

for(int i = 0; i < list.size(); i++) {

LabellabelId_i = new Label(0, i + 1, list.get(i).getTea_id() + "");//String

LabellabelName_i = new Label(1, i + 1, list.get(i).getTea_name());

LabellabelPassword_i = new Label(2, i + 1, list.get(i)

.getTea_password());

LabellabelSex_i = new Label(3, i + 1, list.get(i).getTea_sex());

LabellabelBorn_i = new Label(4, i + 1, list.get(i).getTea_born()

.toString());

LabellabelDepId_i = new Label(6, i + 1, list.get(i).getDep_id()

+"");

ws.addCell(labelId_i);

ws.addCell(labelName_i);

ws.addCell(labelPassword_i);

ws.addCell(labelSex_i);

ws.addCell(labelBorn_i);

ws.addCell(labelDepId_i);

}

//写进文档

wwb.write();

//关闭Excel工作簿对象

wwb.close();

}

}

===============================================================================================================================

package com.hp.excel;

import java.util.List;

import com.hp.bean.Student;

import com.hp.bean.Teacher;

import com.hp.dao.StudentDao;

import com.hp.dao.TeacherDao;

import com.hp.dao.impl.StudentDaoImpl;

import com.hp.dao.impl.TeacherDaoImpl;

import com.hp.util.DBhelper;

/**

* Excel表中的数据导入到MySql数据库

*

* @author Wolf

*

*/

public class TestExcelToDb {

/*

* 创建main（）对方法进行测试

*/

publicstatic void main(String[] args) throws Exception {

TestExcelToDbaa = new TestExcelToDb();

aa.StudentTestExcelToDb();

System.out.println("StudentTestExcelToDb()执行完毕");

}

/*

* 读取学生表

*/

publicvoid StudentTestExcelToDb() {

StudentDaostudentDao = new StudentDaoImpl();

//得到表格中所有的数据

List<Student>listExcel = studentDao

.getStudentAllByExcel("D://onlinexam/StudentTestDbToExcel.xls");

//得到数据库表中所有的数据

//List<Student> listDb=studentDao.getStudentAllByDb();

DBhelperdb = new DBhelper();

for(Student student : listExcel) {

intid = student.getStu_id();

if(!studentDao.isStudentExist(id)) {

//不存在就添加,stu_id未设置为自动增长

Stringsql = "insert into t_student(stu_id,stu_name,stu_password,stu_sex,stu_born,cla_id,dep_id)values(?,?,?,?,?,?,?)";

//如果数组 str 不为Object类型，为某一类型（如String）。那么如果数据类型不唯一，再转换成String类型后，与sql语句整合后执行增删改操作就会抛出类型不匹配错误。

Object[]str = new Object[] { student.getStu_id() + "",

student.getStu_name(),student.getStu_password(),

student.getStu_sex(),student.getStu_born(),

student.getCla_id()+ "", student.getDep_id() + "" };

db.AddU(sql,str);

System.out.println("TestExcelToDb类——StudentTestExcelToDb()——1");

}else {

//存在就更新

Stringsql = "update t_student setstu_name=?,stu_password=?,stu_sex=?,stu_born=?,cla_id=?,dep_id=? wherestu_id=?";

//如果数组 str 不为Object类型，为某一类型（如String）。那么如果数据类型不唯一，再转换成String类型后，与sql语句整合后执行增删改操作就会抛出类型不匹配错误。

Object[]str = new Object[] { student.getStu_name(),

student.getStu_password(),student.getStu_sex(),

student.getStu_born(),

student.getCla_id()+ "", student.getDep_id() + "",id+"" };

db.AddU(sql,str);

System.out.println("TestExcelToDb类——StudentTestExcelToDb()——2");

}

}

}

/*

* 读取教师表

*/

publicvoid TeacherTestExcelToDb() {

TeacherDaoteacherDao = new TeacherDaoImpl();

//得到表格中所有的数据

List<Teacher>listExcel = teacherDao.getTeacherAllByExcel("D://onlinexam/TeacherTestDbToExcel.xls");

//得到数据库表中所有的数据

//List<Teacher> listDb=teacherDaoImpl.getTeacherAllByDb();

DBhelperdb = new DBhelper();

for(Teacher teacher : listExcel) {

intid = teacher.getTea_id();

if(!teacherDao.isTeacherExist(id)) {

//不存在就添加,tea_id未设置为自动增长

Stringsql = "insert into t_teacher(tea_id,tea_name,tea_password,tea_sex,tea_born,dep_id)values(?,?,?,?,?,?)";

//如果数组 str 不为Object类型，为某一类型（如String）。那么如果数据类型不唯一，再转换成String类型后，与sql语句整合后执行增删改操作就会抛出类型不匹配错误。

Object[]str = new Object[] { teacher.getTea_id()+ "",

teacher.getTea_name(),teacher.getTea_password(),

teacher.getTea_sex(),teacher.getTea_born(), teacher.getDep_id() + "" };

db.AddU(sql,str);

System.out.println("TestExcelToDb类——TeacherTestExcelToDb()——1");

}else {

//存在就更新

Stringsql = "update t_teacher settea_name=?,tea_password=?,tea_sex=?,tea_born=?,dep_id=? where tea_id=?";

//如果数组 str 不为Object类型，为某一类型（如String）。那么如果数据类型不唯一，再转换成String类型后，与sql语句整合后执行增删改操作就会抛出类型不匹配错误。

Object[]str = new Object[] {teacher.getTea_name(), teacher.getTea_password(),

teacher.getTea_sex(),teacher.getTea_born(), teacher.getDep_id() + "",id+""};

db.AddU(sql,str);

System.out.println("TestExcelToDb类——TeacherTestExcelToDb()——2");

}

}

}

}

===============================================================================================================================

package com.hp.bean;

import java.io.Serializable;

import java.util.Date;

import javax.persistence.Entity;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name="t_student")

public class Student implements Serializable {

/**

*

*/

privatestatic final long serialVersionUID = 1L;

privateint stu_id;

privateString stu_name;

privateString stu_password;

privateString stu_sex;

privateDate stu_born;

privateint cla_id;

privateint dep_id;

//privateint age;

publicDate getStu_born() {

returnstu_born;

}

publicvoid setStu_born(Date stu_born) {

this.stu_born= stu_born;

}

publicString getStu_sex() {

returnstu_sex;

}

publicvoid setStu_sex(String stu_sex) {

this.stu_sex= stu_sex;

}

publicint getDep_id() {

returndep_id;

}

publicvoid setDep_id(int dep_id) {

this.dep_id= dep_id;

}

@Id

publicint getStu_id() {

returnstu_id;

}

publicvoid setStu_id(int stu_id) {

this.stu_id= stu_id;

}

publicString getStu_name() {

returnstu_name;

}

publicvoid setStu_name(String stu_name) {

this.stu_name= stu_name;

}

publicString getStu_password() {

returnstu_password;

}

publicvoid setStu_password(String stu_password) {

this.stu_password= stu_password;

}

publicint getCla_id() {

returncla_id;

}

publicvoid setCla_id(int cla_id) {

this.cla_id= cla_id;

}

@Override

publicString toString() {

return"Student [stu_id=" + stu_id + ", stu_name=" + stu_name

+", stu_password=" + stu_password + ", stu_sex=" + stu_sex

+", stu_born=" + stu_born + ", cla_id=" + cla_id + ",dep_id="

+dep_id + "]";

}

publicStudent() {

}

publicStudent(int stu_id, String stu_name, String stu_password,

Stringstu_sex, Date stu_born, int cla_id, int dep_id) {

this.stu_id= stu_id;

this.stu_name= stu_name;

this.stu_password= stu_password;

this.stu_sex= stu_sex;

this.stu_born= stu_born;

this.cla_id= cla_id;

this.dep_id= dep_id;

}

}

===================================================================================================================================

package com.hp.dao;

import java.util.Date;

import java.util.List;

import com.hp.bean.*;

import com.hp.util.Page;

//学生业务逻辑接口

public interface StudentDao {

........省略其他功能的方法

/*

* 查询学生表的所有信息

*/

publicList<Student> getStudentAllByDb();

/*

* 查询指定目录中电子表格中所有的数据

* file 文件完整路径

*/

publicList<Student> getStudentAllByExcel(String file);

/*

* 通过Id判断该学生是否存在

*/

public boolean isStudentExist(int sys_id);

}

==================================================================================================================================

package com.hp.dao.impl;

import java.io.File;

import java.io.IOException;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import jxl.Sheet;

import jxl.Workbook;

import jxl.read.biff.BiffException;

import org.hibernate.Query;

import org.hibernate.Session;

import org.hibernate.Transaction;

import com.hp.bean.CourseView;

import com.hp.bean.Department;

import com.hp.bean.QuesView;

import com.hp.bean.Questions;

import com.hp.bean.StuTest;

import com.hp.bean.StuTestSimpleView;

import com.hp.bean.StuTestView;

import com.hp.bean.Student;

import com.hp.bean.StudentView;

import com.hp.bean.Test;

import com.hp.bean.TestView;

import com.hp.dao.StudentDao;

import com.hp.util.DBhelper;

import com.hp.util.HibernateSessionFactory;

import com.hp.util.MySessionFactory;

import com.hp.util.Page;

//学生业务逻辑接口的实现类

public class StudentDaoImpl implements StudentDao {

........省略其他功能的方法

/*

* 查询学生表的所有信息

*/

publicList<Student> getStudentAllByDb() {

List<Student>list = new ArrayList<Student>();

try {

DBhelperdb = new DBhelper();

Stringsql = "select * from t_student";

ResultSetrs = db.Search(sql, null);

while(rs.next()) {

intstu_id = rs.getInt("stu_id");

Stringstu_name = rs.getString("stu_name");

Stringstu_password = rs.getString("stu_password");

Stringstu_sex = rs.getString("stu_sex");

Datestu_born = rs.getDate("stu_born");

intcla_id = rs.getInt("cla_id");

intdep_id = rs.getInt("dep_id");

//System.out.println(stu_id+" "+stu_password+" "+stu_born+

//" "+dep_id);

list.add(newStudent(stu_id, stu_name, stu_password, stu_sex,

stu_born,cla_id, dep_id));

}

} catch(SQLException e) {

// TODOAuto-generated catch block

e.printStackTrace();

}

return list;

}

/*

* 查询指定目录中电子表格中所有的数据 file 文件完整路径

*/

publicList<Student> getStudentAllByExcel(String file) {

List<Student>list_t_student = new ArrayList<Student>();

try {

Workbookrwb = Workbook.getWorkbook(new File(file));

Sheet rs= rwb.getSheet("Test Shee 1");// 或者rwb.getSheet(0)

int clos= rs.getColumns();// 得到所有的列

int rows= rs.getRows();// 得到所有的行

System.out.println("clos:"+ clos + "\t" + " rows:" + rows);

for (inti = 1; i < rows; i++) {

for(int j = 0; j < clos; j++) {

//第一个是列数，第二个是行数

Stringstu_id = rs.getCell(j++, i).getContents();// 默认最左边编号也算一列

//所以这里得j++

String stu_name =rs.getCell(j++, i).getContents();

Stringstu_password = rs.getCell(j++, i).getContents();

Stringstu_sex = rs.getCell(j++, i).getContents();

Stringstu_born = rs.getCell(j++, i).getContents();

Stringcla_id = rs.getCell(j++, i).getContents();

Stringdep_id = rs.getCell(j++, i).getContents();

//将String类型的 stu_born 转换成java.util.Date类型的 stu_born_d

SimpleDateFormatsdf = new SimpleDateFormat("yyyy-MM-dd");// 小写的mm表示的是分钟

java.util.Datestu_born_d = new Date();

try{

stu_born_d= sdf.parse(stu_born);

}catch (ParseException e) {

//TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("Student[stu_id=" + stu_id

+", stu_name=" + stu_name + ", stu_password="

+stu_password + ", stu_sex=" + stu_sex

+", stu_born=" + stu_born + ", cla_id=" + cla_id

+", dep_id=" + dep_id + "]");

list_t_student

.add(newStudent(Integer.parseInt(stu_id),

stu_name,stu_password, stu_sex,

stu_born_d,Integer.parseInt(cla_id),

Integer.parseInt(dep_id)));

}

}

} catch(BiffException e) {

// TODOAuto-generated catch block

e.printStackTrace();

} catch(IOException e) {

// TODOAuto-generated catch block

e.printStackTrace();

}

returnlist_t_student;

}

/*

* 通过Id判断是否存在

*/

public booleanisStudentExist(int stu_id) {

try {

DBhelperdb = new DBhelper();

ResultSetrs = db.Search("select * from t_student where stu_id=?",

newString[] { stu_id + "" });

if(rs.next()) {

returntrue;

}

} catch(SQLException e) {

// TODOAuto-generated catch block

e.printStackTrace();

}

return false;

}

}

===================================================================================================================================