内存不足异常
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【中文标题】内存不足异常【英文标题】：Out of memeory Exception 【发布时间】：2013-07-26 08:13:13 【问题描述】：运行进程时出现堆空间错误。我的代码如下。请验证并尽快给我解决方案。
public static void Read_File(String Filename)
throws IOException
FileInputStream myInput = null;
myInput = new FileInputStream(Filename);
POIFSFileSystem myFileSystem = new POIFSFileSystem(myInput);
HSSFWorkbook myWorkBook = new HSSFWorkbook(myFileSystem);
HSSFSheet mySheet = myWorkBook.getSheetAt(0);
int RowCount = 0;
for (Row row : mySheet)
if (RowCount >= 1)
Cell Eincell = row.getCell(0);
Cell Namecell = row.getCell(1);
Cell InCareofNamecell = row.getCell(2);
Cell Addresscell = row.getCell(3);
Cell Citycell = row.getCell(4);
Cell Statecell = row.getCell(5);
Cell ZipCodecell = row.getCell(6);
Cell GroupExemptionNumbercell = row.getCell(7);
Cell SubsectionCodecell = row.getCell(8);
Cell AffiliationCodecell = row.getCell(9);
Cell ClassificationCodecell = row.getCell(10);
Cell RulingDatecell = row.getCell(11);
Cell DeductibilityCodecell = row.getCell(12);
Cell FoundationCodcell = row.getCell(13);
Cell ActivityCodecell = row.getCell(14);
Cell OrganizationCodecell = row.getCell(15);
Cell ExemptOrganizationStatusCodecell = row.getCell(16);
Cell AdvancedRulingExpirationDatecell = row.getCell(17);
Cell TaxPeriodcell = row.getCell(18);
Cell AssetCodecell = row.getCell(19);
Cell IncomeCodecell = row.getCell(20);
Cell FilingRequirementCodecell = row.getCell(21);
Cell PFFilingRequirementCodecell = row.getCell(22);
Cell Blankcell = row.getCell(23);
Cell AccountingPeriodcell = row.getCell(24);
Cell AssetAmountcell = row.getCell(25);
Cell IncomeAmountcell = row.getCell(26);
Cell NegativeSigncell = row.getCell(27);
Cell Form90RevenueAmountcell = row.getCell(28);
Cell NegativeSign1cell = row.getCell(29);
Cell NTEECodecell = row.getCell(30);
Cell SortorSecondaryNamecell = row.getCell(31);
if (Eincell == null)
Einvalue = 0;
else
try
String ass = String.valueOf(Eincell.getStringCellValue());
Einvalue = Integer.parseInt(ass);
catch (Exception ex)
Einvalue = 0;
if (Namecell == null)
namevalue = "0";
else
try
namevalue = Namecell.getStringCellValue();
catch (Exception ex1)
namevalue = "0";
if (InCareofNamecell == null)
incarevalue = "0";
else
try
incarevalue = InCareofNamecell.getStringCellValue();
catch (Exception ex1)
incarevalue = "0";
if (Addresscell == null)
addressvalue = "0";
else
try
addressvalue = Addresscell.getStringCellValue();
catch (Exception ex1)
addressvalue = "0";
if (Citycell == null)
cityvalue = "0";
else
try
cityvalue = Citycell.getStringCellValue();
catch (Exception ex1)
cityvalue = "0";
if (Statecell == null)
Statevalue = "0";
else
try
Statevalue = Statecell.getStringCellValue();
catch (Exception ex1)
Statevalue = "0";
if (ZipCodecell == null)
zipvalue = "0";
else
try
zipvalue = ZipCodecell.getStringCellValue();
catch (Exception ex1)
zipvalue = "0";
if (GroupExemptionNumbercell == null)
groupvalue = 0;
else
try
groupvalue = (int) GroupExemptionNumbercell.getNumericCellValue();
catch (Exception ex)
groupvalue = 0;
if (SubsectionCodecell == null)
SubsectionCodevalue = 0;
else
try
SubsectionCodevalue = (int) SubsectionCodecell.getNumericCellValue();
catch (Exception ex)
SubsectionCodevalue = 0;
if (AffiliationCodecell == null)
AffiliationCodevalue = 0;
else
try
AffiliationCodevalue = (int) AffiliationCodecell.getNumericCellValue();
catch (Exception ex)
AffiliationCodevalue = 0;
if (ClassificationCodecell == null)
ClassificationCodevalue = 0;
else
try
ClassificationCodevalue = (int) ClassificationCodecell.getNumericCellValue();
catch (Exception ex)
ClassificationCodevalue = 0;
if (RulingDatecell == null)
RulingDatevalue = 0;
else
try
RulingDatevalue = (int) RulingDatecell.getNumericCellValue();
catch (Exception ex)
RulingDatevalue = 0;
if (DeductibilityCodecell == null)
DeductibilityCodevalue = 0;
else
try
DeductibilityCodevalue = (int) DeductibilityCodecell.getNumericCellValue();
catch (Exception ex)
DeductibilityCodevalue = 0;
if (FoundationCodcell == null)
Foundationcodevalue = 0;
else
try
Foundationcodevalue = (int) FoundationCodcell.getNumericCellValue();
catch (Exception ex)
Foundationcodevalue = 0;
if (ActivityCodecell == null)
ActivityCodevalue = 0;
else
try
ActivityCodevalue = (int) ActivityCodecell.getNumericCellValue();
catch (Exception ex)
ActivityCodevalue = 0;
if (OrganizationCodecell == null)
OrganizationCodevalue = 0;
else
try
OrganizationCodevalue = (int) OrganizationCodecell.getNumericCellValue();
catch (Exception ex)
OrganizationCodevalue = 0;
if (ExemptOrganizationStatusCodecell == null)
ExemptOrganizationStatusCodevalue = 0;
else
try
ExemptOrganizationStatusCodevalue = (int) ExemptOrganizationStatusCodecell.getNumericCellValue();
catch (Exception ex)
ExemptOrganizationStatusCodevalue = 0;
if (AdvancedRulingExpirationDatecell == null)
AdvancedRulingExpirationDatevalue = 0;
else
try
AdvancedRulingExpirationDatevalue = (int) AdvancedRulingExpirationDatecell.getNumericCellValue();
catch (Exception ex)
AdvancedRulingExpirationDatevalue = 0;
if (TaxPeriodcell == null)
TaxPeriodvalue = 0;
else
try
TaxPeriodvalue = (int) TaxPeriodcell.getNumericCellValue();
catch (Exception ex)
TaxPeriodvalue = 0;
if (AssetCodecell == null)
AssetCodevalue = 0;
else
try
AssetCodevalue = (int) AssetCodecell.getNumericCellValue();
catch (Exception ex)
AssetCodevalue = 0;
if (IncomeCodecell == null)
IncomeCodevalue = 0;
else
try
IncomeCodevalue = (int) IncomeCodecell.getNumericCellValue();
catch (Exception ex)
IncomeCodevalue = 0;
if (FilingRequirementCodecell == null)
FilingRequirementCode = 0;
else
try
FilingRequirementCode = (int) FilingRequirementCodecell.getNumericCellValue();
catch (Exception ex)
FilingRequirementCode = 0;
if (PFFilingRequirementCodecell == null)
PFFilingRequirementCodevalue = 0;
else
try
PFFilingRequirementCodevalue = (int) PFFilingRequirementCodecell.getNumericCellValue();
catch (Exception ex)
PFFilingRequirementCodevalue = 0;
try
Blankvalue = Blankcell.getStringCellValue();
catch (Exception ex)
Blankvalue = "0";
try
AccountingPeriodvalue = (int) AccountingPeriodcell.getNumericCellValue();
catch (Exception ex)
AccountingPeriodvalue = 0;
try
AssetAmountvalue = AssetAmountcell.getNumericCellValue();
catch (Exception ex)
AssetAmountvalue = 0.0D;
try
IncomeAmountvalue = IncomeAmountcell.getNumericCellValue();
catch (Exception ex)
IncomeAmountvalue = 0.0D;
try
navigaresign = NegativeSigncell.getStringCellValue();
catch (Exception ex)
navigaresign = "0";
try
Form990RevenueAmountvalue = Form90RevenueAmountcell.getNumericCellValue();
catch (Exception ex)
Form990RevenueAmountvalue = 0.0D;
try
navigaresign1_value = NegativeSign1cell.getStringCellValue();
catch (Exception ex)
navigaresign1_value = "0";
try
NTEE_Code_value = NTEECodecell.getStringCellValue();
catch (Exception ex)
NTEE_Code_value = "0";
try
SortorSecondaryName_value = SortorSecondaryNamecell.getStringCellValue();
catch (Exception ex)
SortorSecondaryName_value = "0";
try
YearValue = String.valueOf(TaxPeriodvalue).substring(0, 4).trim();
catch (Exception ex)
YearValue = "0";
try
RangeValue = Math.ceil(Form990RevenueAmountvalue);
catch (Exception ex)
RangeValue = 0.0D;
if (RangeValue < 1000000.0D)
ResultRange = "Less than $1 Million";
else if ((RangeValue > 1000000.0D) && (RangeValue < 9999999.0D))
ResultRange = " $1-9.99 Million";
else if ((RangeValue > 10000000.0D) && (RangeValue < 24999999.0D))
ResultRange = " $10-24.99 Million";
else if ((RangeValue > 25000000.0D) && (RangeValue < 49999999.0D))
ResultRange = " $25-49.99 Million";
else if ((RangeValue > 50000000.0D) && (RangeValue < 74999999.0D))
ResultRange = " $50-74.99 Million";
else if ((RangeValue > 100000000.0D) && (RangeValue < 124999999.0D))
ResultRange = " $100-124.99 Million";
else if ((RangeValue > 125000000.0D) && (RangeValue < 149999999.0D))
ResultRange = " $125-149.99 Million";
else if ((RangeValue > 150000000.0D) && (RangeValue < 199999999.0D))
ResultRange = " $150-199.99 Million";
else if ((RangeValue > 200000000.0D) && (RangeValue < 249999999.0D))
ResultRange = " $200-249.99 Million";
else if ((RangeValue > 250000000.0D) && (RangeValue < 299999999.0D))
ResultRange = " $250-299.99 Million";
else if ((RangeValue > 300000000.0D) && (RangeValue < 349999999.0D))
ResultRange = " $300-349.99 Million";
else if ((RangeValue > 350000000.0D) && (RangeValue < 399999999.0D))
ResultRange = " $350-399.99 Million";
else if ((RangeValue > 400000000.0D) && (RangeValue < 449999999.0D))
ResultRange = " $400-449.99 Million";
else if ((RangeValue > 450000000.0D) && (RangeValue < 499999999.0D))
ResultRange = " $450-499.99 Million";
else if ((RangeValue > 500000000.0D) && (RangeValue < 549999999.0D))
ResultRange = " $500-549.99 Million";
else if ((RangeValue > 550000000.0D) && (RangeValue < 599999999.0D))
ResultRange = " $550-599.99 Million";
else if ((RangeValue > 600000000.0D) && (RangeValue < 649999999.0D))
ResultRange = "$600-649.99 Million";
else if ((RangeValue > 650000000.0D) && (RangeValue < 699999999.0D))
ResultRange = " $650-699.99 Million";
else if ((RangeValue > 700000000.0D) && (RangeValue < 749999999.0D))
ResultRange = "$700-749.99 Million";
else if ((RangeValue > 750000000.0D) && (RangeValue < 799999999.0D))
ResultRange = "$750-799.99 Million";
else if ((RangeValue > 800000000.0D) && (RangeValue < 899999999.0D))
ResultRange = "$800-899.99 Million";
else if ((RangeValue > 900000000.0D) && (RangeValue < 999999999.0D))
ResultRange = "$900-999.99";
else if ((RangeValue > 1000000000.0D) && (RangeValue < 4999999999.0D))
ResultRange = "$1-4.99 Billion";
else if ((RangeValue > 5000000000.0D) && (RangeValue < 14999999999.0D))
ResultRange = "$5-14.99 Billion";
else if ((RangeValue > 15000000000.0D) && (RangeValue < 24999999999.0D))
ResultRange = "$15-24.99 Billion";
else if ((RangeValue > 25000000000.0D) && (RangeValue < 49999999999.0D))
ResultRange = "$25-49.99 Billion";
else if ((RangeValue > 50000000000.0D) && (RangeValue < 74999999999.0D))
ResultRange = "$50-74.99 Billion";
else if ((RangeValue > 75000000000.0D) && (RangeValue < 99999999999.0D))
ResultRange = "$75-99.99 Billion";
else if ((RangeValue > 100000000000.0D) && (RangeValue < 149999999999.0D))
ResultRange = "$100-149.99 Billion";
else if ((RangeValue > 150000000000.0D) && (RangeValue < 199999999999.0D))
ResultRange = "$150-199.99 Billion";
else if ((RangeValue > 200000000000.0D) && (RangeValue < 249999999999.0D))
ResultRange = "$200-249.99 Billion";
else if ((RangeValue > 250000000000.0D) && (RangeValue < 299999999999.0D))
ResultRange = " $250-299.99 Billion";
else if ((RangeValue > 300000000000.0D) && (RangeValue < 349999999999.0D))
ResultRange = " $300-349.99 Billion";
else if ((RangeValue > 350000000000.0D) && (RangeValue < 399999999999.0D))
ResultRange = " $350-399.99 Billion";
else if ((RangeValue > 400000000000.0D) && (RangeValue < 449999999999.0D))
ResultRange = " $400-449.99 Billion";
else if ((RangeValue > 450000000000.0D) && (RangeValue < 499999999999.0D))
ResultRange = " $450-499.99 Billion";
else if (RangeValue > 500000000000.0D)
ResultRange = " $500 Billion +";
table.addRow(new Object[]Integer.valueOf(Einvalue), namevalue, incarevalue, addressvalue, cityvalue, Statevalue, zipvalue, Integer.valueOf(groupvalue), Integer.valueOf(SubsectionCodevalue), Integer.valueOf(AffiliationCodevalue), Integer.valueOf(ClassificationCodevalue), Integer.valueOf(RulingDatevalue), Integer.valueOf(DeductibilityCodevalue), Integer.valueOf(Foundationcodevalue), Integer.valueOf(ActivityCodevalue), Integer.valueOf(OrganizationCodevalue), Integer.valueOf(ExemptOrganizationStatusCodevalue), Integer.valueOf(AdvancedRulingExpirationDatevalue), Integer.valueOf(TaxPeriodvalue), Integer.valueOf(AssetCodevalue), Integer.valueOf(IncomeCodevalue), Integer.valueOf(FilingRequirementCode), Integer.valueOf(PFFilingRequirementCodevalue), Blankvalue, Integer.valueOf(AccountingPeriodvalue), Double.valueOf(AssetAmountvalue), Double.valueOf(IncomeAmountvalue), navigaresign, Double.valueOf(Form990RevenueAmountvalue), navigaresign1_value, NTEE_Code_value, SortorSecondaryName_value, YearValue, ResultRange);
System.gc();
RowCount++;
System.gc();
myInput.close();
【问题讨论】：
你尝试过使用更大的堆大小？？ 我认为这不是获得帮助的好方法“请验证并尽快给我解决方案。” 您是使用给定 API 创建电子表格的人吗？ 【参考方案1】：如果您使用的是 Eclipse，here 是有关如何增加堆空间的完整教程。
转到 Eclipse 文件夹
在 Eclipse 文件夹中查找 Eclipse 图标
右键单击它，您将获得“显示包内容”选项
Contents 文件夹将在屏幕上打开
如果您使用的是 Mac，那么您会找到“MacOS”
打开 MacOS 文件夹你会发现 eclipse.ini 文件
用word或任何文件编辑器打开它进行编辑
...
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m ...
将 -Xmx512m 替换为 -Xmx1024m
保存文件并重新启动 Eclipse
【讨论】：
【参考方案2】：您可以在 VM 参数中增加最大堆大小。
-Xmx=512M
更清晰的理解可以参考this。
【讨论】：
【参考方案3】：我强烈建议你使用一些 csv jar，例如 opencsv 等。它会使代码变得简单易读。
我无法理解您的代码，因为它太长了无法阅读。如果代码没有死循环等漏洞。
你可以试试这个。 在开始运行程序之前在eclipse中添加-Xms512m -Xmx1024m -XX:MaxPermSize=512m
您可以在这里找到更多信息：http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html
【讨论】：
【参考方案4】：为处理的每一行添加一个 System.out，以便您查看进度。您还可以添加：
if(RowCount%10==0)
System.out.println(RowCount);
if(RowCount > 100)
return;
//tweak numbers per your needs/expectations
并查看它是否适用于第一组行。如果您的代码从未超过第 1 行，那么您知道您只是有另一个错误。如果您的电子表格中只有 20 行，并且您看到它转到第 100 行，那么您知道它并没有在您认为的结尾处停止。
如果您有一个巨大的电子表格（例如 100,000 行），并且在死亡之前很高兴地增加到 60,000 行左右，那么关于增加堆空间的其他答案之一将是您最好的选择。
【讨论】：
【参考方案5】：请注意，在java.lang.OutOfMemoryError: Java heap space 之后增加 Java 堆大小通常只是一个短期解决方案。
【讨论】：
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