【IT168 技术文章】
最近项目需要读取Excel，将数据导入数据库保存，最终可以用报表读取数据库并显示，比较简单。查了一下两者的资料，觉的也无所谓，我需要的功能比较简单，只要能读取Excel数据就行，最后决定使用POI，比较信任Apache。
下面付的代码是一个Demo，功能点有两个：一就是POI读取Excel，二是DB2数据库的连接和SQL执行。
import Java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
public class POITest {
private static Connection conn = null;
private static Statement stmt = null;
private static boolean connectDB2() {
String url = "";
String username = "username";
String password = "password";
//加载驱动程序以连接数据库
try {
//添加类库驱动包db2jcc.jar和db2jcc_license_cu.jar
Class.forName("com.ibm.db2.jcc.DB2Driver");
url = "JDBC:db2://192.168.0.1:50000/dbname";
//添加类库驱动包db2java.jar
//Class.forName("com.ibm.db2.jdbc.app.DB2Driver").newInstance();
//url = "jdbc:db2:njtcdata";
conn = DriverManager.getConnection(url, username, password);
stmt = conn.createStatement();
}
//捕获加载驱动程序异常
catch (ClassNotFoundException cnfex) {
System.err.println("装载JDBC驱动程序失败。");
cnfex.printStackTrace();
return false;
}
//捕获连接数据库异常
catch (SQLException sqlex) {
System.err.println("无法连接数据库");
sqlex.printStackTrace();
//System.exit(1); // terminate program
return false;
}
return true;
}
private static boolean readExcelToDB2() {
POIFSFileSystem fs = null;
HSSFWorkbook wb = null;
try {
fs = new POIFSFileSystem(new FileInputStream("c:test.xls"));
wb = new HSSFWorkbook(fs);
} catch (IOException e) {
e.printStackTrace();
return false;
}
HSSFSheet sheet = wb.getSheetAt(0);
HSSFRow row = null;
HSSFCell cell = null;
String name = "";
int id = 0;
int rowNum, cellNum;
int i;
rowNum = sheet.getLastRowNum();
for (i = 0; i <= rowNum; i++) {
row = sheet.getRow(i);
//cellNum = row.getLastCellNum();
cell = row.getCell((short) 0);
name = cell.getStringCellValue();
cell = row.getCell((short) 1);
id = (int) cell.getNumericCellValue();
String sql = "insert into TEST(ID, NAME) values(" + id + ","" + name + "")";
try {
stmt.executeUpdate(sql);
} catch (SQLException e1) {
e1.printStackTrace();
return false;
}
}
return true;
}
public static void main(String[] args) {
if (connectDB2()==true){
if (readExcelToDB2()==true)
System.out.println("数据导入成功");
else
System.out.println("数据导入失败");
}
else{
System.out.println("数据库连接失败");
}
}
}
