servlet上传文件报错（三）

1、具体报错如下

null
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Exception in thread "http-apr-8686-exec-5" java.lang.OutOfMemoryError: Java heap space
	at java.lang.StringCoding$StringDecoder.decode(StringCoding.java:133)
	at java.lang.StringCoding.decode(StringCoding.java:173)
	at java.lang.String.<init>(String.java:444)
	at java.lang.String.<init>(String.java:516)
	at org.apache.commons.fileupload.disk.DiskFileItem.getString(DiskFileItem.java:345)
	at com.you.file.servlet.FileUploadServlet.doPost(FileUploadServlet.java:64)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)

	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)

	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)

2、错误原因

上传文件超过设置文件大小，导致内存溢出

3、解决办法

修改设置文件大小

/**
  * 设置上传文件大小
  */
factory.setSizeThreshold(1024*1024);