问题
How do I use Apache POI to pre-define an auto-filter region in an Excel 2007 document?
A small code example or link would be nice.
回答1:
Save the first and the last cell from the filter area, and execute:
sheet.setAutoFilter(new CellRangeAddress(firstCell.getRow(), lastCell.getRow(), firstCell.getCol(), lastCell.getCol()));
For example, from the sheet below.
>x (x, y)
0123456
0|--hhh--| h = header
1|--+++--| + = values
2|--+++--| - = empty fields
3|--+++--|
4|-------|
fist cell will be the header above the first + (2,1) cell. The the last will be the last + cell (5,3)
回答2:
//include poi-3.7.jar,ojdbc.jar in classpath
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.IndexedColors;
public class ExcelCreator{
public static void createExcel(String anySql,OutputStream out) throws Exception{
Connection conn=getOracleConnection();
String userSql1="select * from tab";
String userSql2="select * from tab";
String[] sqls={userSql1,userSql2,anySql};
String[] workSheetNames={"User","Manager","Any"};
HSSFWorkbook wb = new HSSFWorkbook();
CellStyle style1 = wb.createCellStyle();
CellStyle style2 = wb.createCellStyle();
for(int i=0;i<lt;sqls.length;i++){
if(sqls[i]==null||sqls[i].length()==0){
continue;
}
HSSFSheet sheet = wb.createSheet(workSheetNames[i]);
Statement st = conn.createStatement();
System.out.println("--------------------------");
System.out.println(sqls[i]);
ResultSet rs = st.executeQuery(sqls[i]);
ResultSetMetaData rsMetaData = rs.getMetaData();
int numberOfColumns = rsMetaData.getColumnCount();
int rowCounter=0;
HSSFRow rowHeader = sheet.createRow(rowCounter);
for(int columnCounter=0; columnCounter<lt;numberOfColumns;columnCounter++){
rowHeader.createCell(columnCounter).setCellValue(rsMetaData.getColumnName(columnCounter+1));
setFilledColorStyle(rowHeader.getCell(columnCounter),style2);
}
sheet.setAutoFilter(org.apache.poi.ss.util.CellRangeAddress.valueOf("A1:"+ (Character.toString((char)( 65+numberOfColumns-1)))+"1"));
rowCounter++;
while(rs.next()) {
// Create a row and put some cells in it. Rows are 0 based.
HSSFRow row = sheet.createRow(rowCounter);
for(int columnCounter=0; columnCounter<lt;numberOfColumns;columnCounter++){
row.createCell(columnCounter).setCellValue(rs.getString(columnCounter+1));
setThinBorderStyle(row.getCell(columnCounter),style1);
}
rowCounter++;
}
rs.close();
st.close();
}
// Write the output
wb.write(out);
out.close();
conn.close();
System.out.println("Created Successfully");
}
public static void main(String[] args) throws Exception{
OutputStream out = new FileOutputStream("c:/admin.xls");
createExcel(" select * from tab", out);
}
public static Connection getOracleConnection() throws Exception {
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:XE";
String username = "system";
String password = "password";
Class.forName(driver); // load Oracle driver
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
//This method set the thin border style
private static void setThinBorderStyle(Cell cell, CellStyle style) {
style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBottomBorderColor(IndexedColors.RED.getIndex());
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setLeftBorderColor(IndexedColors.RED.getIndex());
style.setBorderRight(CellStyle.BORDER_THIN);
style.setRightBorderColor(IndexedColors.RED.getIndex());
style.setBorderTop(CellStyle.BORDER_THIN);
style.setTopBorderColor(IndexedColors.RED.getIndex());
cell.setCellStyle(style);
}
//This method set the dashed border style
private static void setDashedBorderStyle(Cell cell, CellStyle style) {
style.setBorderBottom(CellStyle.BORDER_DASHED);
style.setBottomBorderColor(IndexedColors.GREEN.getIndex());
style.setBorderLeft(CellStyle.BORDER_DASHED);
style.setLeftBorderColor(IndexedColors.GREEN.getIndex());
style.setBorderRight(CellStyle.BORDER_DASHED);
style.setRightBorderColor(IndexedColors.GREEN.getIndex());
style.setBorderTop(CellStyle.BORDER_DASHED);
style.setTopBorderColor(IndexedColors.GREEN.getIndex());
cell.setCellStyle(style);
} // This method set the dotted border style
private static void setFilledColorStyle(Cell cell, CellStyle style) {
// style.setFillBackgroundColor(new HSSFColor.YELLOW().getIndex());
style.setFillForegroundColor(IndexedColors.ORANGE.getIndex());
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND );
// style.setBorderLeft(CellStyle.BORDER_DOTTED);
// style.setLeftBorderColor(IndexedColors.BLUE.getIndex());
// style.setBorderRight(CellStyle.BORDER_DOTTED);
// style.setRightBorderColor(IndexedColors.BLUE.getIndex());
// style.setBorderTop(CellStyle.BORDER_DOTTED);
// style.setTopBorderColor(IndexedColors.BLUE.getIndex());
cell.setCellStyle(style);
}
}
回答3:
sets Auto filter
sheet.setAutoFilter(CellRangeAddress.valueOf("A1:N1"));
回答4:
I found it difficult to get the CellRange since my columns and row values were both variable. So I used this trick.
Initialize a lastCellReference variable to A1 which is row1, column1 cell
String lastCellReference = "A1";
Everytime you create a cell update the lastCellReference to maintain latest value
cell = row.createCell((short) columnCount);
cell.setCellValue(rs.getInt(i));
lastCellReference=cell.getReference();
A1 will always be first cell and then the lastCellReference
sheet1.setAutoFilter(CellRangeAddress.valueOf("A1:"+ lastCellReference));
回答5:
This functionality becomes avaliable since 3.7-beta3-20100811 version of apache POI
回答6:
Answer: It's not possible (yet).
https://issues.apache.org/bugzilla/show_bug.cgi?id=35125
来源：https://stackoverflow.com/questions/3114220/poi-auto-filter