我什么时候需要重新编译Jasper报告
[英]When do I need to re-compile Jasper reports
问题描述
I'm using JasperReporting engine, and i need to optimize reporting performance. 
我正在使用JasperReporting引擎，并且需要优化报告性能。 Currently my application compiles reports from *.jrxml files every time, as I'm not changing the reports now and app is not able to generate user-defined reports I should compile them once and use .jasper files in future..... AM I RIGHT?? 目前，我的应用程序每次都从* .jrxml文件编译报告，因为我现在不更改报告，并且应用程序无法生成用户定义的报告，我应该编译一次并在将来使用.jasper文件.....我对吗？？ And do I need to re-compile them? 我需要重新编译它们吗？ Thanks in advance! 提前致谢！
2 个解决方案
解决方案1
0 已采纳 2010-09-23 13:43:50
Let your application check both the .jrxml file and the .jasper file; 让您的应用程序同时检查.jrxml文件和.jasper文件； if the later is missing or older than the .jrxml, recompile, otherwise just use the .jasper file. 如果缺少或晚于.jrxml，请重新编译，否则只需使用.jasper文件。
解决方案2
0 2010-09-23 13:44:08
You must not recompile your reports if you don't change them. 如果不更改报告，则不能重新编译报告。 Actually, there are two regular scenarios: 实际上，有两种常规方案：
- reports created by iReport - in that case compile them in iReport and use the compiled form 由iReport创建的报告-在这种情况下，请在iReport中将其编译并使用已编译的表单
- reports are generated on the fly, dynamically - in that case you'll need to compile them everytime. 报告是动态动态生成的-在这种情况下，您需要每次都进行编译。 This is a much rarer case, though. 但是，这是一种罕见得多的情况。
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