从数据库读数据写到 xls
【问题】
I need your help in storing the fetched values from a SQL statement to an excel file. I wrote the below code, but I am facing difficulties on how to write the fetched values under the appropriate columns. For example at the beginning, I created 3 headers (ID - Name - Salary). Now, I need to write the fetched values from the SQL statement under each appropriate header, but I do not know how to write them. So kindly assist. The code is:
public void GenerateExcel() {
Connection conn = null;
Statement stmt = null;
FileOutputStream fileOut = new FileOutputStream("C:\\Desktop\\poi-test.xls");
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet worksheet = workbook.createSheet("Employee Details");
HSSFRow row1 = worksheet.createRow((short) 0);
HSSFCell cellA1 = row1.createCell((short) 0);
cellA1.setCellValue("ID");
HSSFCell cellB1 = row1.createCell((short) 1);
cellB1.setCellValue("Name");
HSSFCell cellC1 = row1.createCell((short) 1);
cellC1.setCellValue("Salary");
try{
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(DB_URL, USER, PASS);
stmt = conn.createStatement();
String sql = "SELECT id, name, amount FROM Employee";
ResultSet rs = stmt.executeQuery(sql);
while(rs.next()){
int id = rs.getInt("id");
int age = rs.getString("name");
String first = rs.getInt("amount");
}
rs.close();
workbook.write(fileOut);
fileOut.flush();
fileOut.close();
}catch(SQLException se){
se.printStackTrace();
}catch(Exception e){
e.printStackTrace();
}finally{
try{
if(stmt!=null)
conn.close();
}catch(SQLException se){
}
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}
}
}
}
【回答】
数据库到Excel的问题，并非一定要用java编程去处理，推荐SPL去解决，只需建立数据源并输出数据。如下代码：
A |
|
1 |
$select id, name, amount FROM Employee |
2 |
=file("C:\\Desktop\\poi-test.xls ").xlsexport@t(A1) |
A1：建立数据源连接
A2：将数据输出到Excel文件
函数xlsexport支持导出为xls或xlsx，@t表示在首行写入字段名。上述代码不仅可以在命令行执行，也很容易集成到JAVA，参考【Java 如何调用 SPL 脚本】
