「javaexcel注解」java @注解
本篇文章给大家谈谈javaexcel注解，以及java @注解对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
Java对Excel解析(求助)
这篇blog主要是讲述java中poi读取excel，而excel的版本包括：2003-2007和2010两个版本， 即excel的后缀名为：xls和xlsx。
读取excel和MySQL相关： java的poi技术读取Excel数据到MySQL
代码如下
/**
*
*/
package com.b510.common;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Common {
public static final String OFFICE_EXCEL_2003_POSTFIX = "xls";
public static final String OFFICE_EXCEL_2010_POSTFIX = "xlsx";
public static final String EMPTY = "";
public static final String POINT = ".";
public static final String LIB_PATH = "lib";
public static final String STUDENT_INFO_XLS_PATH = LIB_PATH + "/student_info" + POINT + OFFICE_EXCEL_2003_POSTFIX;
public static final String STUDENT_INFO_XLSX_PATH = LIB_PATH + "/student_info" + POINT + OFFICE_EXCEL_2010_POSTFIX;
public static final String NOT_EXCEL_FILE = " : Not the Excel file!";
public static final String PROCESSING = "Processing...";
}
/**
*
*/
package com.b510.excel;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
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.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.b510.common.Common;
import com.b510.excel.util.Util;
import com.b510.excel.vo.Student;
/**
* @author Hongten
* @created 2014-5-20
*/
public class ReadExcel {
/**
* read the Excel file
* @param path the path of the Excel file
* @return
* @throws IOException
*/
public ListStudent readExcel(String path) throws IOException {
if (path == null || Common.EMPTY.equals(path)) {
return null;
} else {
String postfix = Util.getPostfix(path);
if (!Common.EMPTY.equals(postfix)) {
if (Common.OFFICE_EXCEL_2003_POSTFIX.equals(postfix)) {
return readXls(path);
} else if (Common.OFFICE_EXCEL_2010_POSTFIX.equals(postfix)) {
return readXlsx(path);
}
} else {
System.out.println(path + Common.NOT_EXCEL_FILE);
}
}
return null;
}
/**
* Read the Excel 2010
* @param path the path of the excel file
* @return
* @throws IOException
*/
public ListStudent readXlsx(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = new FileInputStream(path);
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
Student student = null;
ListStudent list = new ArrayListStudent();
// Read the Sheet
for (int numSheet = 0; numSheet xssfWorkbook.getNumberOfSheets(); numSheet++) {
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(numSheet);
if (xssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum = xssfSheet.getLastRowNum(); rowNum++) {
XSSFRow xssfRow = xssfSheet.getRow(rowNum);
if (xssfRow != null) {
student = new Student();
XSSFCell no = xssfRow.getCell(0);
XSSFCell name = xssfRow.getCell(1);
XSSFCell age = xssfRow.getCell(2);
XSSFCell score = xssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
}
/**
* Read the Excel 2003-2007
* @param path the path of the Excel
* @return
* @throws IOException
*/
public ListStudent readXls(String path) throws IOException {
System.out.println(Common.PROCESSING + path);
InputStream is = new FileInputStream(path);
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
Student student = null;
ListStudent list = new ArrayListStudent();
// Read the Sheet
for (int numSheet = 0; numSheet hssfWorkbook.getNumberOfSheets(); numSheet++) {
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// Read the Row
for (int rowNum = 1; rowNum = hssfSheet.getLastRowNum(); rowNum++) {
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow != null) {
student = new Student();
HSSFCell no = hssfRow.getCell(0);
HSSFCell name = hssfRow.getCell(1);
HSSFCell age = hssfRow.getCell(2);
HSSFCell score = hssfRow.getCell(3);
student.setNo(getValue(no));
student.setName(getValue(name));
student.setAge(getValue(age));
student.setScore(Float.valueOf(getValue(score)));
list.add(student);
}
}
}
return list;
}
@SuppressWarnings("static-access")
private String getValue(XSSFCell xssfRow) {
if (xssfRow.getCellType() == xssfRow.CELL_TYPE_BOOLEAN) {
return String.valueOf(xssfRow.getBooleanCellValue());
} else if (xssfRow.getCellType() == xssfRow.CELL_TYPE_NUMERIC) {
return String.valueOf(xssfRow.getNumericCellValue());
} else {
return String.valueOf(xssfRow.getStringCellValue());
}
}
@SuppressWarnings("static-access")
private String getValue(HSSFCell hssfCell) {
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
return String.valueOf(hssfCell.getNumericCellValue());
} else {
return String.valueOf(hssfCell.getStringCellValue());
}
}
}
/**
*
*/
package com.b510.excel.client;
import java.io.IOException;
import java.util.List;
import com.b510.common.Common;
import com.b510.excel.ReadExcel;
import com.b510.excel.vo.Student;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Client {
public static void main(String[] args) throws IOException {
String excel2003_2007 = Common.STUDENT_INFO_XLS_PATH;
String excel2010 = Common.STUDENT_INFO_XLSX_PATH;
// read the 2003-2007 excel
ListStudent list = new ReadExcel().readExcel(excel2003_2007);
if (list != null) {
for (Student student : list) {
System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
}
}
System.out.println("======================================");
// read the 2010 excel
ListStudent list1 = new ReadExcel().readExcel(excel2010);
if (list1 != null) {
for (Student student : list1) {
System.out.println("No. : " + student.getNo() + ", name : " + student.getName() + ", age : " + student.getAge() + ", score : " + student.getScore());
}
}
}
}
/**
*
*/
package com.b510.excel.util;
import com.b510.common.Common;
/**
* @author Hongten
* @created 2014-5-21
*/
public class Util {
/**
* get postfix of the path
* @param path
* @return
*/
public static String getPostfix(String path) {
if (path == null || Common.EMPTY.equals(path.trim())) {
return Common.EMPTY;
}
if (path.contains(Common.POINT)) {
return path.substring(path.lastIndexOf(Common.POINT) + 1, path.length());
}
return Common.EMPTY;
}
}
/**
*
*/
package com.b510.excel.vo;
/**
* Student
*
* @author Hongten
* @created 2014-5-18
*/
public class Student {
/**
* id
*/
private Integer id;
/**
* 学号
*/
private String no;
/**
* 姓名
*/
private String name;
/**
* 学院
*/
private String age;
/**
* 成绩
*/
private float score;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNo() {
return no;
}
public void setNo(String no) {
this.no = no;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public float getScore() {
return score;
}
public void setScore(float score) {
this.score = score;
}
}
java poi 操作excel 问题
首先回答你第一个问题：
读取注解代码如下：
Comment comment = sheet.getRow(7).getCell(5, Row.CREATE_NULL_AS_BLANK).getCellComment();
根据批注定位单元格做不到。。。
java怎么用注解操作excel
可以考虑先建一个空的excel
写一条数据就完成对excel的编辑.
每次循环重新读取这个excel 重复编辑这个excel
这样效率可能不行,不过你要程序中断也要写入一些数据
JAVA导出EXCEL表格的备注怎么写
public static void main(String[] args) throws IOException {
//创建工作簿对象
HSSFWorkbook wb=new HSSFWorkbook();
//创建工作表对象
HSSFSheet sheet=wb.createSheet("我的工作表");
//创建绘图对象
HSSFPatriarch p=sheet.createDrawingPatriarch();
//创建单元格对象,批注插入到4行,1列,B5单元格
HSSFCell cell=sheet.createRow(4).createCell(1);
//插入单元格内容
cell.setCellValue(new HSSFRichTextString("批注"));
//获取批注对象
//(int dx1, int dy1, int dx2, int dy2, short col1, int row1, short col2, int row2)
//前四个参数是坐标点,后四个参数是编辑和显示批注时的大小.
HSSFComment comment=p.createComment(new HSSFClientAnchor(0,0,0,0,(short)3,3,(short)5,6));
//输入批注信息
comment.setString(new HSSFRichTextString("插件批注成功!插件批注成功!"));
//添加作者,选中B5单元格,看状态栏
comment.setAuthor("toad");
//将批注添加到单元格对象中
cell.setCellComment(comment);
//创建输出流
FileOutputStream out=new FileOutputStream("writerPostil.xls");
wb.write(out);
//关闭流对象
out.close();
}
关于javaexcel注解和java @注解的介绍到此就结束了，不知道你从中找到你需要的信息了吗 ？如果你还想了解更多这方面的信息，记得收藏关注本站。