使用 Apache POI 写入 xls 文件时出现堆错误
我正在使用 Apache POI 创建一个 excel[.xls] 文件。现在一个 Excel 可以有 65535 行和 65535 行。 256 列。我正在尝试编写java代码来编写包含65535x256单元格的xls文件。我收到堆错误。当前堆配置为-Xms512m -Xmx1700m。 内存大小为 3.5GB。
我的出路是什么? 我正在使用 HSSF* 类来编写 xls 文件。
堆栈跟踪是(我已启用 -verbose:gc 选项)
[Full GC [Tenured: 1092288K->1092288K(1092288K), 3.3174494 secs] 1583807K->1583807K(1583808K), [Perm : 3351K->3351K(12288K)], 3.3174977 secs] [Times: user=3.30 sys=0.03, real=3.33 secs]
[Full GC [Tenured: 1092288K->1092288K(1092288K), 3.3073908 secs] 1583807K->1583807K(1583808K), [Perm : 3351K->3351K(12288K)], 3.3074374 secs] [Times: user=3.30 sys=0.01, real=3.31 secs]
[Full GC [Tenured: 1092288K->9438K(1092288K), 0.3264828 secs] 1583807K->9438K(1583808K), [Perm : 3351K->3351K(12288K)], 0.3265362 secs] [Times: user=0.31 sys=0.00, real=0.31 secs]
Exception in thread "main" Heap
def new generation total 491520K, used 44939K [0x02990000, 0x23ee0000, 0x23ee0000)
eden space 436928K, 10% used [0x02990000, 0x05572fa8, 0x1d440000)
from space 54592K, 0% used [0x1d440000, 0x1d440000, 0x20990000)
to space 54592K, 0% used [0x20990000, 0x20990000, 0x23ee0000)
tenured generation total 1092288K, used 9438K [0x23ee0000, 0x66990000, 0x66990000)
the space 1092288K, 0% used [0x23ee0000, 0x24817810, 0x24817a00, 0x66990000)
compacting perm gen total 12288K, used 3357K [0x66990000, 0x67590000, 0x6a990000)
the space 12288K, 27% used [0x66990000, 0x66cd7778, 0x66cd7800, 0x67590000)
No shared spaces configured.
java.lang.OutOfMemoryError: Java heap space
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:147)
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:125)
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:103)
at com.test.ExcelWriter.createWorkbook(ExcelWriter.java:119)
at com.test.TestMe2.main(TestMe2.java:38)
I am using Apache POI to create an excel[.xls] file. Now an excel can have 65535 rows & 256 cols. I am trying to write the java code to write the xls file with 65535x256 cells. I am getting a heap error. The current heap conf is -Xms512m -Xmx1700m.
RAM size is 3.5gb.
What is the way out for me ?
I am using HSSF* classes to write xls file.
Stack Trace is (I have enabled the -verbose:gc option)
[Full GC [Tenured: 1092288K->1092288K(1092288K), 3.3174494 secs] 1583807K->1583807K(1583808K), [Perm : 3351K->3351K(12288K)], 3.3174977 secs] [Times: user=3.30 sys=0.03, real=3.33 secs]
[Full GC [Tenured: 1092288K->1092288K(1092288K), 3.3073908 secs] 1583807K->1583807K(1583808K), [Perm : 3351K->3351K(12288K)], 3.3074374 secs] [Times: user=3.30 sys=0.01, real=3.31 secs]
[Full GC [Tenured: 1092288K->9438K(1092288K), 0.3264828 secs] 1583807K->9438K(1583808K), [Perm : 3351K->3351K(12288K)], 0.3265362 secs] [Times: user=0.31 sys=0.00, real=0.31 secs]
Exception in thread "main" Heap
def new generation total 491520K, used 44939K [0x02990000, 0x23ee0000, 0x23ee0000)
eden space 436928K, 10% used [0x02990000, 0x05572fa8, 0x1d440000)
from space 54592K, 0% used [0x1d440000, 0x1d440000, 0x20990000)
to space 54592K, 0% used [0x20990000, 0x20990000, 0x23ee0000)
tenured generation total 1092288K, used 9438K [0x23ee0000, 0x66990000, 0x66990000)
the space 1092288K, 0% used [0x23ee0000, 0x24817810, 0x24817a00, 0x66990000)
compacting perm gen total 12288K, used 3357K [0x66990000, 0x67590000, 0x6a990000)
the space 12288K, 27% used [0x66990000, 0x66cd7778, 0x66cd7800, 0x67590000)
No shared spaces configured.
java.lang.OutOfMemoryError: Java heap space
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:147)
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:125)
at org.apache.poi.hssf.usermodel.HSSFRow.createCell(HSSFRow.java:103)
at com.test.ExcelWriter.createWorkbook(ExcelWriter.java:119)
at com.test.TestMe2.main(TestMe2.java:38)
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尝试将 Xms 和 Xmx 设置为相同的值,即
这对您有用吗?
try setting both Xms and Xmx to the same value i.e.
Does this work for you?
我继续遇到 xls 文件的问题。最终我不得不说服客户采用 csv 格式。现在我可以导出超过20000条记录。
感谢@Amine、@Apache Fan、@eon 提出的宝贵建议。
I continued to get the problems with xls file. Eventually I had to convince the customer for a csv format. Now I am able to export more than 20000 records.
Thanks @Amine, @Apache Fan, @eon for your valuable suggestions.