java
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public class ThreadPool {
/**
* 核心线程
*/
public static final int CORE_POOL_SIZE = Runtime.getRuntime().availableProcessors() + 1;
/**
* 线程池最大线程数
*/
public static final int MAX_POOL_SIZE = CORE_POOL_SIZE * 2;
/**
* 空闲线程回收时间
*/
public static final int KEEP_ALIVE_TIME = 30;
/**
* 队列最大长度
*/
public static final int QUEUE_CAPACITY = 128;
private static final ExecutorService executorService =
new ThreadPoolExecutor(CORE_POOL_SIZE,
MAX_POOL_SIZE,
KEEP_ALIVE_TIME,
TimeUnit.SECONDS,
new LinkedBlockingQueue<>(QUEUE_CAPACITY),
Executors.defaultThreadFactory(),
new ThreadPoolExecutor.CallerRunsPolicy());
private ThreadPool() {
}
public static void execute(Runnable task) {
executorService.execute(task);
}
public static void shutdown() {
if(!executorService.isShutdown()){
executorService.shutdown();
}
}
public static Future submit(Runnable task){
return executorService.submit(task);
}
public static boolean cancel(Future future){
if(future != null && !future.isCancelled()){
return future.cancel(true);
}
return false;
}
}
java
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/**
*
* @param context
* @param imageDataList 图片列表
* @param imgColIndex 图片列
*/
private void setImage(CellWriteHandlerContext context, List<ImageData> imageDataList, int imgColIndex) {
Sheet sheet = context.getWriteSheetHolder().getSheet();
Cell cell = context.getCell();
// 图片数量
int maxSize = imageDataList.size() > 1 ? imageDataList.size() : 1;
// 根据图片数量设置图片列的宽度
sheet.setColumnWidth(imgColIndex, (int)(18 * maxSize + 0.72) * 256);
// 图片宽度,单位px,自己设置咯
int picWidth = Units.pixelToEMU(125);
Drawing drawing = sheet.getDrawingPatriarch();
if (drawing == null) {
drawing = sheet.createDrawingPatriarch();
}
for (int i = 0; i < imageDataList.size(); i++) {
int index = sheet.getWorkbook().addPicture(imageDataList.get(i).getImage(), XSSFWorkbook.PICTURE_TYPE_PNG);
// 设置图片坐标和位置 dx1, dy1, dx2, dy2, col1, row1, col2, row2
// (dx1, dy1)是起始单元格图片左上角的坐标
// (dx2, dy2)是结束单元格图片右下角的坐标
// (col1, row1)是起始单元格位置
// (col2, row2)是结束单元格位置
ClientAnchor anchor = drawing.createAnchor(picWidth, 0, picWidth + picWidth * i,
0,cell.getColumnIndex(), cell.getRowIndex(), cell.getColumnIndex(), cell.getRowIndex() + 1);
// 设置图片可以随着单元格移动
anchor.setAnchorType(ClientAnchor.AnchorType.MOVE_AND_RESIZE);
drawing.createPicture(anchor, index);
}
}