数据库导入导出

数据库导入代码：

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WriteException;

public class Export3 {

	
	String dbDriver="org.gjt.mm.mysql.Driver";
	String url = "";
	String user = ""; 
	String passwordOfDB = "";  //������ݿⲢ��֤���	
	private static int ExpTable(Connection oConn,String FileName,String []TableName,int maxRowCount)
	{
		jxl.write.WritableWorkbook wwb=null;
		jxl.write.WritableSheet wa=null;
		OutputStream outf=null;
		try {
			
			File myFilePath=new File(FileName);   
			if(!myFilePath.exists())   
			myFilePath.createNewFile();   
			FileWriter resultFile=new FileWriter(myFilePath);   
			PrintWriter myFile=new PrintWriter(resultFile);   
			resultFile.close();
			outf = new FileOutputStream(FileName);   
	        wwb = Workbook.createWorkbook(outf);   
	        wa = wwb.createSheet("main", 0);    
			    wa.addCell(new Label(0,0,"tablename")); 
		        wa.addCell(new Label(1,0,"datasheet")); 
		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}     
		int n=1;
		int a=0;  
		
		for (int m = 0; m < TableName.length; m++)
		{
		String sql = "select * from "+TableName[m];   
		PreparedStatement stmt=null;
		ResultSet rs = null;
		try
		{
			stmt=oConn.prepareStatement(sql);
			rs=stmt.executeQuery(sql);   
			int pagecount=0;
		    jxl.write.WritableSheet ws = null;

		  
		int nColmnCount=rs.getMetaData().getColumnCount();
		int index = 0; 
		int headercount=0;
		boolean bHasnext=false; 
		while((bHasnext=rs.next())||headercount==0){   
			
			if(ws==null||index==0)
			{
				pagecount++;
		        ws=wwb.createSheet(TableName[m]+pagecount, pagecount);   
		    	wa.addCell(new Label(0,a+1,TableName[m])); 
		    	wa.addCell(new Label(1,a+1,TableName[m]+pagecount)); 
		        a++;   
				for (int k = 0; k < rs.getMetaData().getColumnCount(); k++) {
					String ColName=rs.getMetaData().getColumnName(k+1);
					String ColType=rs.getMetaData().getColumnTypeName(k+1);
					 ws.addCell(new Label(k,0,ColName+"/"+ColType));   
				}   
				index=0;
				headercount++;
			}
			index++; 
			for (int k = 0; bHasnext&&k < nColmnCount; k++) {   
			ws.addCell(new Label(k,index,rs.getString(k+1)));   
			    }  
			if(index>=maxRowCount)
			{
				index=0;
			}
		}   
		    
		}catch(Exception e){e.printStackTrace();}   
		finally{   
			if(rs!=null)
				try {
					rs.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			if(stmt!=null)
				try {
					stmt.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		}   
	}
	    try {
	    	
			wwb.write();   
			wwb.close();
			outf.close();
		} catch (WriteException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}  
		return n;
	}
	public Export3(String dbDriver,String url,String user,String passwordOfDB)
	{
		this.dbDriver=dbDriver;
		this.url=url;
		this.user=user;
		this.passwordOfDB=passwordOfDB;
		try {
			Class.forName(dbDriver);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public  int ExpTable(String FileName,String []TableName,int maxRowCount)
	{
		Connection oConn=null;
		try{ 
			oConn = DriverManager.getConnection(url, user, passwordOfDB); 
		} catch (Exception ex) 
		{ ex.printStackTrace(); 
			return -1;
		} 
		int cnt=ExpTable(oConn,FileName,TableName,maxRowCount);
		try {
			oConn.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return cnt;
	}
//	public static void main(String [] argv)
//	{
//
//		Export3 aa=new Export3
//			("org.gjt.mm.mysql.Driver",
//			"jdbc:mysql://10.4.116.12:3306/radius",
//			"root","123456");
//			String []TableName={"sys_login_rec_t","department_t"};
//		aa.ExpTable("d:\\mmm.xls",TableName,20);		
//	}
}

数据库导出代码：

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;

public class Import {

	String dbDriver="org.gjt.mm.mysql.Driver";
	String url = "";
	String user = ""; 
	String passwordOfDB = ""; 
private static int ImpTable(Connection oConn,String FileName,String[] TableName) throws SQLException{
	HashMap<String,List<String>> oTabSheets=new HashMap<String,List<String>>();
	Statement stmt=null;
	PreparedStatement pstmt=null;
try {

InputStream is = new FileInputStream(FileName);
Workbook book=Workbook.getWorkbook(is);
//Workbook book = Workbook.getWorkbook( new File("D:\\kl.xls "));
//获得第一个工作表对象
Sheet sheet = book.getSheet("main");

	for(int i=1;i<sheet.getRows();i++)
	{
		Cell cell=sheet.getCell(0, i);
		String sTablename=cell.getContents();
		cell=sheet.getCell(1, i);
		String sSheet=cell.getContents();
		List<String> curSheet=oTabSheets.get(sTablename);
		if(curSheet==null)
		{
			curSheet=new ArrayList<String>();
			oTabSheets.put(sTablename, curSheet);
		}
		curSheet.add(sSheet);
	}

	for(int i=0;i<TableName.length;i++)
	{
		List<String> curSheet=oTabSheets.get(TableName[i]);
			stmt=oConn.createStatement();
			stmt.executeUpdate("truncate table "+TableName[i] );
			stmt.close();
			stmt=null;

		for(int n=0;n<curSheet.size();n++)
		{
			String sheetname=curSheet.get(n);
			Sheet sheett = book.getSheet(sheetname);
			//拿到列，行
			int column=sheett.getColumns();
			int row=sheett.getRows();
			//拿到每一行，每列的值
			String inssql="insert into "+TableName[i] +" (";
			String sqlvalues=" values (";
			for(int j=0;j<column;j++){
			Cell colName=sheett.getCell(j,0 );
			//Cell colType=sheett.getCell(j,1);
			//System.out.println();
			 if(j>0)
				 inssql+=",";
			 String sColName=colName.getContents();
			 int pos=sColName.indexOf('/');
			 if(pos>=0)
			 {
				 sColName=sColName.substring(0,pos);
			 }
			 inssql+=sColName;
				if(j>0)
					sqlvalues+=",";
					sqlvalues+="?";
			}
			inssql=inssql+") "+sqlvalues+")";
		    pstmt=oConn.prepareStatement(inssql);
		    System.out.println(inssql);
			for(int k=1;k<row;k++){
				for(int j=0;j<column;j++){
					Cell col=sheett.getCell( j,k);
					System.out.println(col.getContents());
					String val=col.getContents();
					if(val!=null&&val.length()>0)
						pstmt.setString(j+1, val);
					else
						pstmt.setString(j+1,null);
				}
				pstmt.execute();
			}
			pstmt.close();
			pstmt=null;
		}
	}
	book.close();
} catch (Exception e) {
	e.printStackTrace();
}
finally {
	if(stmt!=null)
		try {
			stmt.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	if(pstmt!=null)
		try {
			stmt.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
}
return 0;
}
public Import (String dbDriver,String url,String user,String passwordOfDB)
{
	this.dbDriver=dbDriver;
	this.url=url;
	this.user=user;
	this.passwordOfDB=passwordOfDB;
	try {
		Class.forName(dbDriver);
	} catch (ClassNotFoundException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
}
public int ImpTable(String FileName,String[] TableName)
{
	Connection oConn=null;
	try{ 
		oConn = DriverManager.getConnection(url, user, passwordOfDB);
		Statement stmt=oConn.createStatement();
		stmt.execute("set names 'utf8'");
		stmt.close();
		int cnt=ImpTable(oConn,FileName,TableName);
	} catch (Exception ex) 
	{ ex.printStackTrace(); 
		return -1;
	} 
	try {
		oConn.close();
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	return 0;	
}

//public static void main(String [] argv)
//{
//	Import bb=new Import
//	("org.gjt.mm.mysql.Driver",
//	"jdbc:mysql://10.4.116.12:3306/radius",
//	"root","123456");
//	String []TableName={"sys_login_rec3_t","department3_t"};
//	bb.ImpTable("d:\\kl.xls",TableName);
//	
//}
}