Jasper Reports中的图像表达式URL [英] Image expression URL in Jasper Reports

问题描述

我想将图像嵌入到JasperReports jrxml文件中。我有这个目录结构。

  Tomcat Root 
 webapps 
报告
  - >图片
  - > company_logo.jpg 
  - >报告
  - > sample.jasper 
  - > WEB-INF 
  - >类
  

我尝试这样做，认为这是相对于我的报告上下文根

< pre class =lang-xml prettyprint-override> < image>
< reportElement x =0y =0width =104height =40/>
< imageExpression class =java.lang.String>
<！[CDATA [images / company_logo.jpg]]>
< / imageExpression>
< / image>


..这也是

 < image> 
< reportElement x =0y =0width =104height =40/> 
< imageExpression class =java.lang.String> 
<！[CDATA [/ images / company_logo.jpg]]> 
< / imageExpression> 
< / image> 
  

但它总是说从位置 JRLoader加载字节时出错。

我试过这样做并且有效，但我有点困惑为什么我的前两次尝试没有。

这真的是你在JasperReports中嵌入图片的方式吗？你需要提供整条路径吗？我想应该有一个页面相对
的东西。

 < image> ; 
< reportElement x =0y =0width =104height =40/> 
< imageExpression class =java.lang.String> 
<！[CDATA [http：// localhost：8080 / reports / images / company_logo.jpg]]> 
< / imageExpression> 
< / image> 
  

我对正确的方法感到有点困惑。

解决方案

<！[CDATA [../ images / company_logo.jpg]]> 应该做的特技。路径相对于.jasper文件。

I would like to embed an image into my JasperReports jrxml file. I have this directory structure.

Tomcat Root
 webapps
  reports
   -->images
    --> company_logo.jpg
   -->reports
    -->sample.jasper
   -->WEB-INF
    -->classes

And I tried doing this thinking that this is relative to my reports context root

<image>
 <reportElement x="0" y="0" width="104" height="40"/>
 <imageExpression class="java.lang.String">
  <![CDATA["images/company_logo.jpg"]]>
 </imageExpression>
</image>

..and this also

<image>
 <reportElement x="0" y="0" width="104" height="40"/>
 <imageExpression class="java.lang.String">
  <![CDATA["/images/company_logo.jpg"]]>
 </imageExpression>
</image>

but it always says there was an error loading bytes from location JRLoader.

I tried doing this and it works, but I am a bit confused why my first two attempt doesn't.

Is this really how you embed images in JasperReports? Do you need to supply the whole path? I am thinking that there should be a page relative something.

<image>
 <reportElement x="0" y="0" width="104" height="40"/>
 <imageExpression class="java.lang.String">
  <![CDATA["http://localhost:8080/reports/images/company_logo.jpg"]]>
 </imageExpression>
</image>

I am a bit puzzled about the correct way.

解决方案

<![CDATA["../images/company_logo.jpg"]]> should do the trick. The path is relative to your .jasper file.

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