Question

我需要将BigDecimal值转换为字符串。我做了如下：

    @Column(name="CASE_ID", precision=22, scale=0)
public BigDecimal getCaseId() {
    return this.caseId;
}

public void setCaseId(BigDecimal caseId) {
    this.caseId = caseId;
}    String caseId = "";

caseId = vList.get(i).getCaseId().toString();
dataCell.setCellValue(caseId);

我得到一个运行时异常，如下所示：

2013-03-11 14：49：11,046 WARN [HTTPThreadGroup-4]   org.apache.struts.action.RequestProcessor：抛出未处理的异常：   class java.lang.ClassCastException

包装异常：

java.lang.ClassCastException: [Ljava.lang.Object;
    at com.report.getExport(ExportToExcelAction.java:468)
    at com.report.getExport.view(ExportToExcelAction.java:134)
    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:585)
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
    at gov.pbgc.spectrum.util.SpectrumLookupDispatchAction.execute(SpectrumLookupDispatchAction.java:119)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)

我知道toString()会将BigDecimal转换为String。我没有得到编译时异常，但我确实得到了运行时异常。任何见解？

Answer 1

好的..然后按以下方式更改您的代码：

caseId = ((CsValidateReport)vList.get(i)).getCaseId();
而不是这一行：

String caseId = "";使用String sCaseId = "";然后您可以按以下步骤操作：

caseId = ((CsValidateReport)vList.get(i)).getCaseId();
sCaseId = caseId.toPlainString() ;
dataCell.setCellValue(sCaseId );

Java中的BigDecimal到String

1 个答案: