用java怎样把数据存到数据库中

只能写个大概的，要写数据到数据库中，先得在数据库中建库，库里建表，表里建字段，然后java里建立数据库连接，用SQL语言写数据到表中的字段

ClassforName("commicrosoftsqlserverjdbcSQLServerDriver")newInstance();

//String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=数据库名"; //70、2000

String url="jdbc:sqlserver://localhost:1433;DatabaseName=数据库名"; //2005

Connection conn=null;

conn= DriverManagergetConnection(url,用户名,密码);

PreparedStatement pst=null;

pst=connprepareStatement("Insert Into grade(表名) Values ()");

pstsetInt(1,你要写的整弄数据);

//pstsetString(2,你要写的字符串数据);

pstaddBatch();

pstexecuteBatch();

前段时间正好做了，导入和导出的，你自己看吧

/导出数据为XLS格式

@param fos

@param bo

/

public void writeExcelBo(FileOutputStream fos, javautilVector ve)

{

jxlwriteWritableWorkbook wwb;

try

{

wwb= WorkbookcreateWorkbook(fos);

jxlwriteWritableSheet ws= wwbcreateSheet("booksheet", 10);

wsaddCell(new jxlwriteLabel(0, 1, "书目ID"));

wsaddCell(new jxlwriteLabel(1, 1, "ISBN"));

wsaddCell(new jxlwriteLabel(2, 1, "定价"));

wsaddCell(new jxlwriteLabel(3, 1, "书名"));

wsaddCell(new jxlwriteLabel(4, 1, "原书名"));

wsaddCell(new jxlwriteLabel(5, 1, "副题名"));

wsaddCell(new jxlwriteLabel(6, 1, "著者"));

wsaddCell(new jxlwriteLabel(7, 1, "译者"));

wsaddCell(new jxlwriteLabel(8, 1, "版次"));

wsaddCell(new jxlwriteLabel(9, 1, "出版地"));

wsaddCell(new jxlwriteLabel(10, 1, "出版社"));

wsaddCell(new jxlwriteLabel(11, 1, "出版日期"));

wsaddCell(new jxlwriteLabel(12, 1, "页数"));

wsaddCell(new jxlwriteLabel(13, 1, "书高"));

wsaddCell(new jxlwriteLabel(14, 1, "装帧"));

wsaddCell(new jxlwriteLabel(15, 1, "丛书名"));

wsaddCell(new jxlwriteLabel(16, 1, "一般性附注项"));

wsaddCell(new jxlwriteLabel(17, 1, "简介"));

wsaddCell(new jxlwriteLabel(18, 1, "主题词"));

wsaddCell(new jxlwriteLabel(19, 1, "中图法分类"));

wsaddCell(new jxlwriteLabel(20, 1, "更新日期"));

wsaddCell(new jxlwriteLabel(21, 1, "本数"));

book=new Book[vesize()];

for (int i= 0; i < vesize(); i++)

{

book[i]= (Book)veget(i);

wsaddCell(new jxlwriteLabel(0, i + 2, "" + book[i]getBookId()));

wsaddCell(new jxlwriteLabel(1, i + 2, book[i]getIsbn()));

wsaddCell(new jxlwriteLabel(2, i + 2, "" + book[i]getPrice()));

wsaddCell(new jxlwriteLabel(3, i + 2, book[i]getBookTitle()));

wsaddCell(new jxlwriteLabel(4, i + 2, book[i]getOldFilename()));

wsaddCell(new jxlwriteLabel(5, i + 2, book[i]getSubTitle()));

wsaddCell(new jxlwriteLabel(6, i + 2, book[i]getWriter()));

wsaddCell(new jxlwriteLabel(7, i + 2, book[i]getTranscribe()));

wsaddCell(new jxlwriteLabel(8, i + 2, "" + book[i]getVersion()));

wsaddCell(new jxlwriteLabel(9, i + 2, book[i]getPublishCity()));

wsaddCell(new jxlwriteLabel(10, i + 2, book[i]getPublisher()));

wsaddCell(new jxlwriteLabel(11, i + 2, book[i]getPublishDate()toString()));

wsaddCell(new jxlwriteLabel(12, i + 2, "" + book[i]getPage()));

wsaddCell(new jxlwriteLabel(13, i + 2, "" + book[i]getHight()));

wsaddCell(new jxlwriteLabel(14, i + 2, book[i]getInstall()));

wsaddCell(new jxlwriteLabel(15, i + 2, book[i]getSeries()));

wsaddCell(new jxlwriteLabel(16, i + 2, book[i]getNotes()));

wsaddCell(new jxlwriteLabel(17, i + 2, book[i]getPrecisnotes()));

wsaddCell(new jxlwriteLabel(18, i + 2, book[i]getSubject()));

wsaddCell(new jxlwriteLabel(19, i + 2, book[i]getCls()replaceAll("_", "")));

wsaddCell(new jxlwriteLabel(20, i + 2, book[i]getUpdatedate()toString()));

wsaddCell(new jxlwriteLabel(21, i + 2, "0"));

}

jxlwriteWritableFont wfc=

new jxlwriteWritableFont(

WritableFontARIAL,

255,

WritableFontBOLD,

false,

UnderlineStyleNO_UNDERLINE,

jxlformatColourBLACK);

jxlwriteWritableCellFormat wcfFC= new jxlwriteWritableCellFormat(wfc);

wsaddCell(new jxlwriteLabel(0, 0, "为保证您提交定单的稳定和正确，导入定单时候请勿更改此表格式（请勿更改书目ID,订购本数自行添加！）"));

wwbwrite();

//关闭Excel工作薄对象

wwbclose();

} catch (IOException e)

{} catch (RowsExceededException e)

{} catch (WriteException e)

{}

}

//导入EXCEL

if (fgetName()indexOf("xls") > 0)

{

try

{

fis= new FileInputStream(f);

BookBean bob= new BookBean();

UserBean usb= new UserBean();

jxlWorkbook rwb= WorkbookgetWorkbook(fis);

jxlSheet sh= rwbgetSheet(0);

int rowCount= shgetRows();

SimpleDateFormat sdf= new SimpleDateFormat("dd/MM/yyyy");

book= new Book[rowCount - 1];

for (int i= 1; i < rowCount; i++)

{

book[i - 1]= new Book();

jxlCell[] ce= shgetRow(i);

book[i - 1]setIsbn(ce[0]getContents()toString());

book[i - 1]setSeries(ce[1]getContents()toString());

book[i - 1]setBookTitle(ce[2]getContents()toString());

book[i - 1]setWriter(ce[3]getContents()toString());

book[i - 1]setTranscribe(ce[4]getContents()toString());

book[i - 1]setPublisher(ce[5]getContents()toString());

book[i - 1]setPublishDate(sdfparse(ce[6]getContents()toString(), new ParsePosition(0)));

book[i-1]setVersion(IntegerparseInt(ce[7]getContents()toString()));

book[i-1]setPage(IntegerparseInt(ce[8]getContents()toString()));

book[i-1]setCls(ce[9]getContents()toString());

book[i-1]setPrecisnotes(ce[10]getContents()toString());

book[i-1]setInstall(ce[11]getContents()toString());

book[i-1]setPrice(FloatparseFloat(ce[12]getContents()toString()));

book[i-1]setUserid(usbgetUser()getUserid());

getVector()addElement(book[i - 1]);

}

rwbclose();

fisclose();

} catch (FileNotFoundException e)

{} catch (BiffException e)

{} catch (IOException e)

{} catch (NumberFormatException e)

{

ShowMessage("数据导入失败，请按照本软件要求的EXCEL格式导入定单");

}

}

import jxl; \x0d\import jxlwrite; \x0d\import javaio; \x0d\import javaioFile; \x0d\import javautil; \x0d\\x0d\public class excel \x0d\{ \x0d\public static void main(String[] args) \x0d\{ \x0d\\x0d\String targetfile = "c:/outxls";//输出的excel文件名 \x0d\String worksheet = "List";//输出的excel文件工作表名 \x0d\String[] title = {"ID","NAME","DESCRIB"};//excel工作表的标题 \x0d\\x0d\WritableWorkbook workbook; \x0d\try \x0d\{ \x0d\//创建可写入的Excel工作薄,运行生成的文件在tomcat/bin下 \x0d\//workbook = WorkbookcreateWorkbook(new File("outputxls")); \x0d\Systemoutprintln("begin"); \x0d\\x0d\OutputStream os=new FileOutputStream(targetfile); \x0d\workbook=WorkbookcreateWorkbook(os); \x0d\\x0d\WritableSheet sheet = workbookcreateSheet(worksheet, 0); //添加第一个工作表 \x0d\//WritableSheet sheet1 = workbookcreateSheet("MySheet1", 1); //可添加第二个工作 \x0d\/ \x0d\jxlwriteLabel label = new jxlwriteLabel(0, 2, "A label record"); //put a label in cell A3, Label(column,row) \x0d\sheetaddCell(label); \x0d\/ \x0d\\x0d\jxlwriteLabel label; \x0d\for (int i=0; i回答于 2022-11-16

下面的代码是读取文本文件的例子，程序会读取texttxt文件，并将它的内容显示出来。

1importjavaio;

2importjavaioFile;

3importjavaioFileReader;

4importjavaio;

5importjavaioIOException;

6

7publicclass

8{

9publicstaticvoidmain(String[]args)

10{

11Filefile=newFile("testtxt");

12contents=new();

13reader=null;

14

15try

16{

17reader=new(newFileReader(file));

18Stringtext=null;

19

20//repeatuntilalllinesisread

21while((text=readerreadLine())!=null)

22{

23contentsappend(text)

24append(SystemgetProperty(

25"lineseparator"));

26}

27}catch(e)

28{

29e();

30}catch(IOExceptione)

31{

32e();

33}finally

34{

35try

36{

37if(reader!=null)

38{

39readerclose();

40}

41}catch(IOExceptione)

42{

43e();

44}

45}

46

47//showfilecontentshere

48Systemoutprintln(contentstoString());

下面是我写的一个运用jxl生成Excel文件的方法

该方法接收一个保存MarkesData数据的ArrayList arlist和文件生成路径Path

通过取得arlist里的数据生成Excel文件

感觉应该是你想要的 我没调试过也许有错 你也可以根据你的需要进行修改^_^

import javaioFile;

import javaioIOException;

import javautilArrayList;

import javautilIterator;

import jxlWorkbook;

import jxlwriteLabel;

import jxlwriteWritableSheet;

import jxlwriteWritableWorkbook;

import jxlwriteWriteException;

import jxlwritebiffRowsExceededException;

public class WriteExcel {

WritableWorkbook book=null;

public void OutputExcel(ArrayList arlist,String Path){

try{

book = WorkbookcreateWorkbook(new File(Path));

//设置表名

WritableSheet sheet = bookcreateSheet("考试单",0);

//生成表格题头

Label labe1 = new Label(0, 0, "考生姓名" );

Label labe2 = new Label(1, 0, "地区");

Label labe3 = new Label(2, 0, "所属院校");

Label labe4 = new Label(3, 0, "班级");

Label labe5 = new Label(4, 0, "考试号");

Label labe6 = new Label(5, 0, "考试时间");

Label labe7 = new Label(6, 0, "科目名称");

//将生成的单元格添加到工作表中

sheetaddCell(labe1);

sheetaddCell(labe2);

sheetaddCell(labe3);

sheetaddCell(labe4);

sheetaddCell(labe5);

sheetaddCell(labe6);

sheetaddCell(labe7);

Iterator it = arlistiterator();

int i = 1;

while(ithasNext()){

//通过迭代获得arlist里的MarkesData对象

MarkesData temp = (MarkesData)itnext();

//取得数据生成单元格

Label label1=new Label(0,i,tempgetUser_name());

Label label2=new Label(1,i,tempgetArea_name());

Label label3=new Label(2,i,tempgetCollege_name());

Label label4=new Label(3,i,tempgetClass_name());

Label label5=new Label(4,i,tempgetTest_name());

Label label6=new Label(5,i,tempgetStarttime());

Label label7=new Label(6,i,tempgetSubject_name());

//将生成的单元格添加到工作表中

sheetaddCell(label1);

sheetaddCell(label2);

sheetaddCell(label3);

sheetaddCell(label4);

sheetaddCell(label5);

sheetaddCell(label6);

sheetaddCell(label7);

i++;

}

bookwrite();

bookclose();

} catch (RowsExceededException e) {

eprintStackTrace();

} catch (WriteException e) {

eprintStackTrace();

} catch (IOException e) {

eprintStackTrace();

} finally{

try{

if(book!=null)bookclose();

}catch(Exception e){

Systemoutprintln("exception when closing Connection in finally");

Systemoutprintln(egetMessage()toString());

}

}

}

}

该是一些特殊符被转义了，你可以把mysqldump -u root -proot --opt mysql > C:/Users/success/aksql 这句写到一个bat文件里面，然后java中就直接调用这个bat文件就可以避免了！

刚刚漏了帐号密码了，现在补上

try {

//这里的是MYSQL 举例

//加载驱动 

ClassforName("commysqljdbcDriver");

//创建数据库连接

Connection con = DriverManagergetConnection("jdbc:mysql://localhost:3306/test","root","root");

//创建查询 “请求”

PreparedStatement ps = conprepareStatement("select  from user");

//返回查询结果

ResultSet rs = psexecuteQuery();

//遍历结果

while(rsnext()) {

//假如 User 表中 有个 name 列

Systemoutprintln("name >> "+rsgetString("name"));

}

//关闭

rsclose();

psclose();

conclose();

} catch (Exception e) {

eprintStackTrace();

}

oracle

数据库导入导出（用dmp的方法）

cmd

1

将数据库SampleDB完全导出,用户名system

密码manager

导出到E:\SampleDBdmp中

exp

file=E:\sampleDBdmp

full=y

2将备份数据库文件中的数据导入指定的数据库SampleDB

中,如果

SampleDB

已存在该表,则不再导入;

imp

file=D:\SampleDBdmp

full=y

ignore=y

如果没有DBA权限，用以下命令授予DBA权限

sqlplus

/

as

sysdba;

conn

system/manager

sql>grant

dba

to

SampleDB

以上就是关于用java怎样把数据存到数据库中全部的内容，包括:用java怎样把数据存到数据库中、java中把SQL数据库中的表导出到excel中.怎么实现、在Java编程中怎么将从数据库查询出来的数据导成Excel文件等相关内容解答，如果想了解更多相关内容，可以关注我们，你们的支持是我们更新的动力！