java文件导入数据库

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java文件导入数据库

本文目录一览：

1、用java如何将txt文件导入mysql？
2、用java代码把txt文档中资料导入到数据库
3、Java获取网络文件并插入数据库
4、如何用java导入Excel数据到数据库
5、怎样用Java实现从文本文档中读取数据并存入数据库

用java如何将txt文件导入mysql？

Java中将txt文件导入到mysql基本困启码的思路，操作流获取到文件具体信息，然后将信息拼接成mysql插入到数据库中。

1.先读取txt文件的内容，文件内容可以按照一定的规律进行排列旁告，这样程序读取就方便。

2.java.io.IOExceptionimportjava.io.RandomAccessFileimportjava.io.UnsupportedEncodingException。

3.import java.text.SimpleDateFormat，汪哪import java.util.Date， import java.util.regex.Matcher，

import java.util.regex.Pattern

4.import com.config.Constants; import com.utils.UUIDUtil;

5.public static final String TXT_FILE_PATH =“D：//testUser.txt。

public static final String openFileStyle =“r”。

用java代码把txt文档中资料导入到数据库

BufferedReader input;

try {

String s = new String();

input = new BufferedReader(new FileReader("f:\\123.txt"));

while ((s = input.readLine()) != null) { // 判断是否读到了最后一行

String info[] = s.split("培激 "败唤);

System.out.println( info[0] + " " + info[1] + " " + info[2] );

}

input.close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

把info[0] + " " + info[1] + " " + info[2] 这配枯袜三个值放在insert语句里就行了经过测试

Java获取网络文件并插入数据库

抓取各大网站的数据插入数据库这样就不用为没有数据而烦恼了

获取百度的歌曲名歌手和链接！！

package webTools;

import java io BufferedReader;

import java io IOException;

import java io InputStreamReader;

import java io UnsupportedEncodingException;

import MalformedURLException;

import URL;

import java util ArrayList;

　虚旁　import java util HashMap;

李含import java util List;

import java util regex Matcher;

import java util regex Pattern;

哪誉笑import dbTools DBTools;

public class IOTOWeb {

public String getHtmlContent(String URL) {

URL url = null;

String rowContent = ;

StringBuffer Content = new StringBuffer();

try {

url = new URL(URL);

BufferedReader in = new BufferedReader(new InputStreamReader(url

openStream() gb ));

while ((rowContent = in readLine()) != null) {

Content append(rowContent);

}

in close();

} catch (MalformedURLException e) {

// TODO Auto generated catch block

e printStackTrace();

} catch (UnsupportedEncodingException e) {

// TODO Auto generated catch block

e printStackTrace();

} catch (IOException e) {

// TODO Auto generated catch block

e printStackTrace();

}

return Content toString();

}

public List getLink(String Content) {

ArrayList listLink = new ArrayList();

String regex = td[^]*[\\(]*a[^]*href=(\ ([^\ ]*)\ |\ ([^\ ]*)\ |([^\\s]*))[^]*( *?)[\\)]*[\\s]*/td ;

Pattern pattern = pile(regex Pattern DOTALL);

Matcher matcher = pattern matcher(Content);

while (matcher find()) {

listLink add(matcher group());

}

return listLink;

}

public ListString getHref(String Content) {

String regex;

List listtHref = new ArrayList();

regex = href=(\ ([^\ ]*)\ |\ ([^\ ]*)\ |([^\\s]*))\ ;

Pattern pa = pile(regex Pattern DOTALL);

Matcher ma = pa matcher(Content);

while (ma find()) {

listtHref add(ma group() replaceFirst( href=\ ) replace( \

));

}

return listtHref;

}

public ListString getPerson(String Content) {

String regex;

List list = new ArrayList();

regex = ]*href=(\"([^\"]*)\"|\ ([^\ ]*)\ |([^\\s]*))[^]*( *?)\\ \\(a[^]*href=(\ ([^\ ]*)\ |\ ([^\ ]*)\ |([^\\s]*))[^]*( *?)\\) ;

Pattern pa = pile(regex Pattern DOTALL);

Matcher ma = pa matcher(Content);

while (ma find()) {

list add(ma group() replaceFirst( href=\ ) replace( \ ));

}

return list;

}

public ListString getSongName(String Content) {

String regex;

List listPerson = new ArrayList();

regex = a[^]*href=(\ ([^\ ]*)\ |\ ([^\ ]*)\ |([^\\s]*))[^]*( *?)/a\\s ;

Pattern pa = pile(regex Pattern DOTALL);

Matcher ma = pa matcher(Content);

while (ma find()) {

listPerson add(ma group());

}

return listPerson;

}

public String getMainContent(String Content) {

String regex = table width=\ %\ align=\ center\ cellpadding=\ \ cellspacing=\ \ class=\ list\ ( *?)/table ;

StringBuffer mainContent = new StringBuffer();

Pattern pattern = pile(regex Pattern DOTALL);

Matcher matcher = pattern matcher(Content);

while (matcher find()) {

mainContent append(matcher group());

}

return mainContent toString();

}

public String outTag(final String s) {

return s replaceAll( *? );

}

DBTools dbTools = new DBTools();

public void getFromBaiduMap (String URL) throws Throwable {

HashMap ContentMap = new HashMap();

String Content = getHtmlContent(URL);

String mainContent = getMainContent(Content);

List listLink = getLink(mainContent);

for (int j = ; j listLink size(); j++) {

String tdTag = listLink get(j) toString();

List songNameList = getSongName(tdTag);

String songName = outTag(songNameList get( ) toString());

List personList = getPerson(tdTag);

String songPerson = ;

if (personList size() != ) {

for (int n = ; n personList size(); n++) {

// System out println(personList get(n) toString());

songPerson = outTag(personList get(n) toString());

}

} else {

songPerson = 无 ;

}

// System out print(songNameList get( ) toString());

List hrefList = getHref(songNameList get( ) toString());

String songHref = hrefList get( ) toString();

System out println();

String sql = insert into song(songName songPerson songHref) values(? ? ?) ;

ArrayList list_values = new ArrayList();

list_values add(songName);

list_values add(songPerson);

list_values add(songHref);

dbTools update(sql list_values);

}

DBTools数据库链接类

package dbTools;

import java util ArrayList;

import java sql *;

public class DBTools {

private PreparedStatement preparedStatement;

private ResultSet resultSet;

private Connection connection;

public DBTools() {

try {

Class forName( mysql jdbc Driver );

} catch (ClassNotFoundException e) {

// TODO Auto generated catch block

e printStackTrace();

}

try {

connection = DriverManager getConnection(

jdbc:mysql://localhost: /TestURL root zhuyi );

} catch (SQLException e) {

// TODO Auto generated catch block

e printStackTrace();

}

public ArrayList query(String sql ArrayList list_values) throws Throwable {

ArrayList listRows = new ArrayList();

preparedStatement = connection prepareStatement(sql);

for (int i = ; i list_values size(); i++) {

preparedStatement setObject(i + list_values get(i));

}

resultSet = preparedStatement executeQuery();

while (resultSet next()) {

String[] rowinfo = new String[resultSet getMetaData()

getColumnCount()];

for (int i = ; i rowinfo length; i++) {

rowinfo[i] = resultSet getString(i + );

}

listRows add(rowinfo);

}

return listRows;

}

public void update(String sql ArrayList list_values) throws Throwable {

preparedStatement = connection prepareStatement(sql);

for (int i = ; i list_values size(); i++) {

preparedStatement setObject(i + list_values get(i));

}

preparedStatement executeUpdate();

preparedStatement close();

}

Servlet调用

代码

package controller;

import java io IOException;

import java io PrintWriter;

import java util List;

import javax servlet ServletException;

import javax servlet HttpServlet;

import javax servlet HttpServletRequest;

import javax servlet HttpServletResponse;

import webTools IOTOWeb;

public class TestURL extends HttpServlet {

/**

* Constructor of the object

public TestURL() {

super();

}

/**

* Destruction of the servlet br

public void destroy() {

super destroy(); // Just puts destroy string in log

// Put your code here

}

/**

* The doGet method of the servlet br

* This method is called when a form has its tag value method equals to get

* @param request

* the request send by the client to the server

* @param response

* the response send by the server to the client

* @throws ServletException

* if an error occurred

* @throws IOException

* if an error occurred

public void doGet(HttpServletRequest request HttpServletResponse response)

throws ServletException IOException {

try {

IOTOWeb iotoWeb = new IOTOWeb();

iotoWeb getFromBaiduMap ( ?id= ?top );

} catch (Throwable e) {

// TODO Auto generated catch block

e printStackTrace();

}

/**

* The doPost method of the servlet br

* This method is called when a form has its tag value method equals to

* post

* @param request

* the request send by the client to the server

* @param response

* the response send by the server to the client

* @throws ServletException

* if an error occurred

* @throws IOException

* if an error occurred

public void doPost(HttpServletRequest request HttpServletResponse response)

throws ServletException IOException {

response setContentType( text/ );

PrintWriter out = response getWriter();

out

println( !DOCTYPE HTML PUBLIC \ //W C//DTD HTML Transitional//EN\ );

out println( HTML );

out println( HEADTITLEA Servlet/TITLE/HEAD );

out println( BODY );

out print( This is );

out print(this getClass());

out println( using the POST method );

out println( /BODY );

out println( /HTML );

out flush();

out close();

}

/**

* Initialization of the servlet br

* @throws ServletException

* if an error occurs

public void init() throws ServletException {

// Put your code here

}

获取金书网的图书名

代码

package webTools;

import java io BufferedReader;

import java io InputStreamReader;

import URL;

import java util ArrayList;

import java util List;

import java util regex Matcher;

import java util regex Pattern;

import dbTools DBTools;

public class GetBook {

public String getHtmlContent(String URL) throws Throwable {

URL url = null;

String rowContent = ;

StringBuffer Content = new StringBuffer();

url = new URL(URL);

BufferedReader in = new BufferedReader(new InputStreamReader(url

openStream() gb ));

while ((rowContent = in readLine()) != null) {

Content append(rowContent);

}

in close();

return Content toString();

}

public String getBookName(String Content) {

String bookName = ;

String regex = span class=\ style \ [^]*/span ;

Pattern pattern = pile(regex Pattern DOTALL);

Matcher matcher = pattern matcher(Content);

if (matcher find()) {

bookName = matcher group();

}

return bookName;

}

public String outTag(final String s) {

return s replaceAll( *? );

}

DBTools dbtools = new DBTools();

public void getFromJINSHU(String URL) throws Throwable {

String Content = getHtmlContent(URL);

String bookName = outTag(getBookName(Content));

if (bookName != null ! equals(bookName)) {

System out println(bookName);

String sql = insert into bookinfo(bookName) values(?) ;

ArrayList list_values = new ArrayList();

list_values add(bookName);

dbtools update(sql list_values);

}

调用Servlet

代码

package controller;

import java io IOException;

import java io PrintWriter;

import javax servlet ServletException;

import javax servlet HttpServlet;

import javax servlet HttpServletRequest;

import javax servlet HttpServletResponse;

import webTools GetBook;

public class TestBook extends HttpServlet {

/**

* Constructor of the object

public TestBook() {

super();

}

/**

* Destruction of the servlet br

public void destroy() {

super destroy(); // Just puts destroy string in log

// Put your code here

}

/**

* The doGet method of the servlet br

* This method is called when a form has its tag value method equals to get

* @param request

* the request send by the client to the server

* @param response

* the response send by the server to the client

* @throws ServletException

* if an error occurred

* @throws IOException

* if an error occurred

int i = ;

public void doGet(HttpServletRequest request HttpServletResponse response)

throws ServletException IOException {

GetBook bookinfo = new GetBook();

for (; i ; i++) {

String bookURL = /booksinfo/ / + i

+ l ;

try {

bookinfo getFromJINSHU(bookURL);

} catch (Throwable e) {

i++;

doPost(request response);

}

/**

* The doPost method of the servlet br

* This method is called when a form has its tag value method equals to

* post

* @param request

* the request send by the client to the server

* @param response

* the response send by the server to the client

* @throws ServletException

* if an error occurred

* @throws IOException

* if an error occurred

public void doPost(HttpServletRequest request HttpServletResponse response)

throws ServletException IOException {

GetBook bookinfo = new GetBook();

for (; i ; i++) {

String bookURL = /booksinfo/ / + i

+ l ;

try {

bookinfo getFromJINSHU(bookURL);

} catch (Throwable e) {

i++;

doGet(request response);

}

/**

* Initialization of the servlet br

* @throws ServletException

* if an error occurs

public void init() throws ServletException {

// Put your code here

}

lishixinzhi/Article/program/Java/hx/201311/25707

如何用java导入Excel数据到数据库

public static void main(String args[]) throws BiffException, IOException, WriteException{

//1 从Excel文件读取数据表

//缓信汪Java Excel API既可以从本地文件系统的一个文件(.xls)，也可以从输入流中读取Excel数据表。

//读取Excel数据表的第一步是创建Workbook(术语：工作薄)，下面的代码片段举例说明了应该如何操作：

//(完整代码见ExcelReading.java)

try

{

//构建Workbook对象, 只读Workbook对象

//直接从本地文件创建Workbook

//从输入流创建Workbook

InputStream is = new FileInputStream("D:/user.xls");

jxl.Workbook rwb = Workbook.getWorkbook(is);

//一旦创建了Workbook，我们就可以通过它来访问Excel Sheet(术语：工作表)。参考下面的代码片段：

//获取第一张Sheet表

Sheet rs = (Sheet) rwb.getSheet(0);

//我们既可能通过Sheet的名称来访问它，也可以通过下标来访问它。如果通扰仔过下标来访问的话，

//要注意的一点是下标从0开始，就像数组一样。

//一旦得到了Sheet，我们就可以通过它来访问Excel Cell(术语：单元格)。参考下面的代码片段：

//获取第一行，第一列的值

Cell c00 = ((jxl.Sheet) rs).getCell(0, 0);

String strc00 = c00.getContents();

//获取第一行，第二列的值

Cell c10 = ((jxl.Sheet) rs).getCell(1, 0);

String strc10 = c10.getContents();

//获取第二行，第二列的值

Cell c11 = ((jxl.Sheet) rs).getCell(1, 1);

String strc11 = c11.getContents();

System.out.println("Cell(0, 0)" + " value : " + strc00 + "; type : " + c00.getType());

System.out.println("Cell(1, 0)" + " value : " + strc10 + "; type : " + c10.getType());

System.out.println("Cell(1, 1)" + " value : " + strc11 + "; type : " + c11.getType());

//如果仅仅是坦辩取得Cell的值，我们可以方便地通过getContents()方法，

//它可以将任何类型的Cell值都作为一个字符串返回。示例代码中Cell(0, 0)是文本型，

//Cell(1, 0)是数字型，Cell(1,1)是日期型，通过getContents()，三种类型的返回值都是字符型。

//如果有需要知道Cell内容的确切类型，API也提供了一系列的方法。参考下面的代码片段：

String strcc00 = null;

double strcc10 = 0.00;

Date strcc11 = null;

Cell cc00 = ((jxl.Sheet) rs).getCell(0, 0);

Cell cc10 = ((jxl.Sheet) rs).getCell(1, 0);

Cell cc11 = ((jxl.Sheet) rs).getCell(1, 1);

if(c00.getType() == CellType.LABEL)

{

LabelCell labelc00 = (LabelCell)cc00;

strcc00 = labelc00.getString();

}

if(c10.getType() == CellType.NUMBER)

{

NumberCell numc10 = (NumberCell)cc10;

strcc10 = numc10.getValue();

}

if(c11.getType() == CellType.DATE)

{

DateCell datec11 = (DateCell)cc11;

strcc11 = datec11.getDate();

}

System.out.println("Cell(0, 0)" + " value : " + strcc00 + "; type : " + cc00.getType());

System.out.println("Cell(1, 0)" + " value : " + strcc10 + "; type : " + cc10.getType());

System.out.println("Cell(1, 1)" + " value : " + strcc11 + "; type : " + cc11.getType());

//在得到Cell对象后，通过getType()方法可以获得该单元格的类型，然后与API提供的基本类型相匹配，

//强制转换成相应的类型，最后调用相应的取值方法getXXX()，就可以得到确定类型的值。

//API提供了以下基本类型，与Excel的数据格式相对应，如下图所示：

//每种类型的具体意义，请参见Java Excel API Document。

//当你完成对Excel电子表格数据的处理后，一定要使用close()方法来关闭先前创建的对象，

//以释放读取数据表的过程中所占用的内存空间，在读取大量数据时显得尤为重要。参考如下代码片段：

//操作完成时，关闭对象，释放占用的内存空间

rwb.close();

}

catch (Exception e)

{

e.printStackTrace();

}

//Java Excel API提供了许多访问Excel数据表的方法，在这里我只简要地介绍几个常用的方法，

//其它的方法请参考附录中的Java Excel API Document。

//Workbook类提供的方法

//1. int getNumberOfSheets();

//获得工作薄（Workbook）中工作表（Sheet）的个数，示例：

jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

int sheets = rwb.getNumberOfSheets();

//2. Sheet[] getSheets();

//返回工作薄（Workbook）中工作表（Sheet）对象数组，示例：

jxl.Workbook rwb2 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

Sheet[] sheets2 = (Sheet[]) rwb2.getSheets();

//3. String getVersion();

//返回正在使用的API的版本号，好像是没什么太大的作用。

jxl.Workbook rwb3 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

String apiVersion = rwb3.getVersion();

//Sheet接口提供的方法

//1) String getName();

//获取Sheet的名称，示例：

jxl.Workbook rwb4 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs = rwb4.getSheet(0);

String sheetName = rs.getName();

//2) int getColumns()

//获取Sheet表中所包含的总列数，示例：

jxl.Workbook rwb5 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs2 = rwb5.getSheet(0);

int rsColumns = rs2.getColumns();

//3) Cell[] getColumn(int column)

//获取某一列的所有单元格，返回的是单元格对象数组，示例：

jxl.Workbook rwb6 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs3 = rwb6.getSheet(0);

Cell[] cell = rs3.getColumn(0);

//4) int getRows()

//获取Sheet表中所包含的总行数，示例：

jxl.Workbook rwb7 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs4 = rwb7.getSheet(0);

int rsRows = rs4.getRows();

//5) Cell[] getRow(int row)

//获取某一行的所有单元格，返回的是单元格对象数组，示例子：

jxl.Workbook rwb8 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs5 = rwb8.getSheet(0);

Cell[] cell5 = rs5.getRow(0);

//6) Cell getCell(int column, int row)

//获取指定单元格的对象引用，需要注意的是它的两个参数，第一个是列数，第二个是行数，

//这与通常的行、列组合有些不同。

jxl.Workbook rwb9 = jxl.Workbook.getWorkbook(new File("D:/user.xls"));

jxl.Sheet rs6 = rwb9.getSheet(0);

Cell cell6 = rs6.getCell(0, 0);

怎样用Java实现从文本文档中读取数据并存入数据库

不知道你要什么样的文本，文本中的内容是否是有格式的：

这里提供下思路，供参考：

1.文本文件，基本上式字符格式的了，可以用Reader io流

2.如果是格式化的文本，可以按数据的长度读取， readInt readByte...

3.保存到数据库当然用JDBC了，如果你读取出来封装成POJO了，也可以选择 OM框架

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

/**

* 文件读取和写入数据库

* @author 樊云升

告皮*

public class FilesReader {

public FilesReader(){

}

/**

* 读取文件内容

* @param FILE

* @return

public String re_content(String FILE){

String content="";

try{ 察改

BufferedReader bufRead=new BufferedReader(new InputStreamReader(new FileInputStream(FILE)));

String str;

while((str=bufRead.readLine())!=null){

content+=str+"\r\n";

}

}catch(IOException ioe){

ioe.printStackTrace();

}

return content;

}

/**

* 将特定字符写入数据库中（原来我写的是重写文件，你这里这里将content写入数据库就OK）

* @param path

* @return

public boolean writeFile(String content){

try{

//数据库写入代码

}catch(Exception e){

out.close();

return false;

}

return true;

}

public static void main(String[] args) {

String content=new FilesReader().re_content("D:\\AJAX.htm"败友判);

new FilesReader().writeFile(content);

}