需求：將如圖EXCEL的內容按行讀取，封裝成對象。
實現類：進行Excel讀取
package bao.test;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.format.CellFormat;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class TestExcel {
public static void main(String[] args) {
TestExcel te=new TestExcel();
File f= new File("G:\\tran.xlsx");
try {
List<TranTaskDao> list=te.readExcel(f);
int size=list.size();
for(int i=0;i<size;i++) {//輸出每一行
System.out.println(i+"\t"+list.get(i).toString());
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public List<TranTaskDao> readExcel(File file) throws Exception {
//獲取文件名字
String fileName = file.getName();
//獲取文件類型
String fileType = fileName.substring(fileName.lastIndexOf(".") + 1);
System.out.println(" **** fileType:" + fileType);
//獲取輸入流
InputStream stream = new FileInputStream(file);
//獲取工作薄
Workbook xssfWorkbook = null;
if (fileType.equals("xls")) {
xssfWorkbook = new HSSFWorkbook(stream);
} else if (fileType.equals("xlsx")) {
xssfWorkbook = new XSSFWorkbook(stream);
} else {
System.out.println("您輸入的excel格式不正確");
}
TranTaskDao a = null;
List<TranTaskDao> aList = new ArrayList<TranTaskDao>();
// Read the Sheet
Sheet Sheet = xssfWorkbook.getSheetAt(0);
// Read the Row 從0開始
for (int rowNum = 0; rowNum <= Sheet.getLastRowNum(); rowNum++) {
Row Row = Sheet.getRow(rowNum);
if (Row != null) {
//判斷這行記錄是否存在
if (Row.getLastCellNum() < 1 || "".equals(getValue(Row.getCell(1)))) {
continue;
}
//獲取每一行封裝成對象
a = new TranTaskDao();
a.setTranid(getValue(Row.getCell(1)));
// System.out.println(getValue(Row.getCell(1)));
a.setTask_id(getValue(Row.getCell(2)));
a.setTask_name(getValue(Row.getCell(3)));
a.setToTask_id(getValue(Row.getCell(4)));
a.setToTask_name(getValue(Row.getCell(5)));
//System.out.println(getValue(Row.getCell(5)));
a.setTrans_expression(getValue(Row.getCell(6)));
a.setComments(getValue(Row.getCell(7)));
aList.add(a);
}
}
return aList;
}
private String getValue(Cell cell){
if (cell==null) {//單元格爲空
return "空空如也！";
}else {
int type = CellFormat.ultimateType(cell);
if(type == Cell.CELL_TYPE_BOOLEAN)
{
return String.valueOf(cell.getBooleanCellValue());
}
else if(type == Cell.CELL_TYPE_NUMERIC)
{
return String.valueOf(cell.getNumericCellValue());
}
else if(type == Cell.CELL_TYPE_BLANK)
{
return "";
}
else
{
return cell.getStringCellValue().trim();
}
}
}
}
包裝類：將行封裝成的對象
package bao.test;
public class TranTaskDao {
public String tranid;
public String task_id;
public String task_name;
public String toTask_id;
public String toTask_name;
public String trans_expression;//轉移條件
public String comments;//備註
public String getTranid() {
return tranid;
}
public void setTranid(String tranid) {
this.tranid = tranid;
}
public String getTask_id() {
return task_id;
}
public void setTask_id(String task_id) {
this.task_id = task_id;
}
public String getTask_name() {
return task_name;
}
public void setTask_name(String task_name) {
this.task_name = task_name;
}
public String getToTask_id() {
return toTask_id;
}
public void setToTask_id(String toTask_id) {
this.toTask_id = toTask_id;
}
public String getToTask_name() {
return toTask_name;
}
public void setToTask_name(String toTask_name) {
this.toTask_name = toTask_name;
}
public String getTrans_expression() {
return trans_expression;
}
public void setTrans_expression(String trans_expression) {
this.trans_expression = trans_expression;
}
public String getComments() {
return comments;
}
public void setComments(String comments) {
this.comments = comments;
}
public String toString() {
String str=this.tranid+"\t"+this.getTask_id()+'\t'+this.task_name+'\t'+
this.getToTask_id()+"\t"+this.getToTask_name()+'\t'+this.getTrans_expression()+'\t'+this.getComments();
return str;
}
}
注意：java讀取excel所需jar包下載