使用jxl时，文件损坏是怎么回事？

Question

今天在学习使用jxl修改excel。第一次执行的时候，程序是正常运行，但第二次的时候文件就损坏了。代码如下：

public class ExcelWrite {

	@Test
	public void read() throws Exception {
		Workbook wb = Workbook.getWorkbook(new File("开通账号.xls"));
		WritableWorkbook book = Workbook.createWorkbook(new File("开通账号.xls"), wb);
		Sheet sht = wb.getSheet(0);
		WritableSheet sheet = book.getSheet(0);
		Cell[] numCells = sht.getColumn(0);
		List<String> names = new ArrayList<String>();
		for (int i = 1; i < numCells.length; i++) {
			names.add(numCells[i].getContents());
		}
		for (String s : names) {
			System.out.println(2 << 3);
		}
		book.close();
	}
}

异常：

java.lang.ArrayIndexOutOfBoundsException: 0
	at jxl.read.biff.BOFRecord.<init>(BOFRecord.java:81)
	at jxl.read.biff.WorkbookParser.parse(WorkbookParser.java:548)
	at jxl.Workbook.getWorkbook(Workbook.java:237)
	at jxl.Workbook.getWorkbook(Workbook.java:198)
	at com.ceprei.mis.service.ExcelWrite.read(ExcelWrite.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

最近遇到这异常，我的情况是给标题加了背景颜色导致，jxl对有些样式支持不好，清除格式试下吧。

Answer 2

java.lang.ArrayIndexOutOfBoundsException:0，越界了，看下异常，指向哪行代码

Answer 3

java.lang.ArrayIndexOutOfBoundsException:0