推荐回答(3个)
/**
* @author liuwu
* Excel的导入与导出
*/
@SuppressWarnings({ "unchecked" })
public class ExcelOperate {
/**
* @author liuwu
* 这是一个通用的方法,利用了JAVA的反射机制,
* 可以将放置在JAVA集合中并且符合一定条件的数据以EXCEL的形式输出到指定IO设备上
* @param title 表格标题名
* @param headers 表格属性列名数组
* @param dataset 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。
* 此方法支持的 javabean属性【数据类型有java基本数据类型及String,Date,byte[](图片转成字节码)】
* @param out 与输出设备关联的流对象,可以将EXCEL文档导出到本地文件或者网络中
* @param pattern 如果有时间数据,设定输出格式。默认为"yyy-MM-dd"
* @throws IOException
*/
public static void exportExcel(String title, String[] headers,Collection> dataset, OutputStream out, String pattern) throws IOException {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 20);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (short i = 0; i < headers.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
// 遍历集合数据,产生数据行
Iterator> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
Object t = it.next();
// 利用反射,根据javabean属性的先后顺序,动态调用getXxx()方法得到属性值
Field[] fields = t.getClass().getDeclaredFields();
for (short i = 0; i < fields.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Field field = fields[i];
String fieldName = field.getName();
String getMethodName = "get"
+ fieldName.substring(0, 1).toUpperCase()
+ fieldName.substring(1);//注意 实体get Set不要自己改名字不然反射会有问题
try {
Class tCls = t.getClass();
Method getMethod = tCls.getMethod(getMethodName,new Class[] {});
Object value = getMethod.invoke(t, new Object[] {});
HSSFRichTextString richString = new HSSFRichTextString(value.toString());
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
} catch (SecurityException e) {
e.printStackTrace();
e=null;
} catch (NoSuchMethodException e) {
e.printStackTrace();
e=null;
} catch (IllegalArgumentException e) {
e.printStackTrace();
e=null;
} catch (IllegalAccessException e) {
e.printStackTrace();
e=null;
} catch (InvocationTargetException e) {
e.printStackTrace();
e=null;
} finally {
// 清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
e=null;
}
}
}
试试使用spire.xls.jar读取excel内容:
import com.spire.xls.*;
public class ReadExcel {
public static void main(String[] args) {
//创建Workbook对象
Workbook wb = new Workbook();
//加载一个Excel文档
wb.loadFromFile("C:\\Users\\Administrator\\Desktop\\test.xlsx");
//获取第一个工作表
Worksheet sheet = wb.getWorksheets().get(0);
//遍历工作表的每一行//Loop through rows
for (int i = 1; i < sheet.getLastRow() + 1; i++) {
//遍历工作的每一列
for (int j = 1; j < sheet.getLastColumn() + 1; j++) {
//输出指定单元格的数据
System.out.print(sheet.get(i,j).getText());
System.out.print("\t");
}
System.out.print("\n");
}
}
}
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