当前位置： 文江博客话题详情

Jasper：从 url 打开输入流时出错

发布于 2024-12-18 17:51:11 字数 3828 浏览 1 评论 0原文

我正在使用 iReport 设计一个 jasper 报告，它接受一个参数并从给定的 URL 获取图像：

该参数是 Twitter 中用户的屏幕名称，而 url 是它的个人资料图像。

    <image>
       <reportElement x="4" y="51" width="73" height="64"/>
           <imageExpression><![CDATA["https://api.twitter.com/1/users/profile_image?screen_name="+$F{user_screen_name}+"&size=bigger"]]></imageExpression>
    </image>

当图像存在时它效果很好。如果没有，则会引发以下异常：

    Error filling print... net.sf.jasperreports.engine.JRException: Error opening input stream from URL :
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger 
    Setting up the file resolver... net.sf.jasperreports.engine.JRRuntimeException:
    net.sf.jasperreports.engine.JRException: Error opening input stream from URL :
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger 
    at net.sf.jasperreports.repo.DefaultRepositoryService.getInputStream(DefaultRepositoryService.java:138)
    at net.sf.jasperreports.repo.RepositoryUtil.findInputStream(RepositoryUtil.java:186)     
    at net.sf.jasperreports.repo.RepositoryUtil.getBytes(RepositoryUtil.java:202)
    at net.sf.jasperreports.engine.JRImageRenderer.getInstance(JRImageRenderer.java:141)     
    at net.sf.jasperreports.engine.fill.JRFillImage.evaluateImage(JRFillImage.java:498)
    at net.sf.jasperreports.engine.fill.JRFillImage.evaluate(JRFillImage.java:441)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:257)
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:468)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2037)     
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:761)     
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:291)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:133)     
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:903)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:813)
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:58)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247)
    at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:878)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Caused by: 
    net.sf.jasperreports.engine.JRException: Error opening input stream from URL : 
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger     
    at net.sf.jasperreports.engine.util.JRLoader.getInputStream(JRLoader.java:314)
    at net.sf.jasperreports.repo.DefaultRepositoryService.getInputStream(DefaultRepositoryService.java:121)
    ... 19 more Caused by: java.io.FileNotFoundException: 
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger     
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1401)     
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at java.net.URL.openStream(URL.java:1029)     
    at net.sf.jasperreports.engine.util.JRLoader.getInputStream(JRLoader.java:310)... 20 more 
    Print not filled. Try to use an EmptyDataSource...

How can i process this manner in the jrxml file?

我想简单地添加一个固定的 URL 地址，以防找不到。

有人有什么建议吗？

谢谢你！

原文

I'm designing a jasper report using iReport which takes a parameter and fetches an image from a given URL:

The parameter is a user's screen name in twitter, and the url is it's profile image.

    <image>
       <reportElement x="4" y="51" width="73" height="64"/>
           <imageExpression><![CDATA["https://api.twitter.com/1/users/profile_image?screen_name="+$F{user_screen_name}+"&size=bigger"]]></imageExpression>
    </image>

It works great when the image exists. If it doesn't the following exception is thrown:

    Error filling print... net.sf.jasperreports.engine.JRException: Error opening input stream from URL :
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger 
    Setting up the file resolver... net.sf.jasperreports.engine.JRRuntimeException:
    net.sf.jasperreports.engine.JRException: Error opening input stream from URL :
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger 
    at net.sf.jasperreports.repo.DefaultRepositoryService.getInputStream(DefaultRepositoryService.java:138)
    at net.sf.jasperreports.repo.RepositoryUtil.findInputStream(RepositoryUtil.java:186)     
    at net.sf.jasperreports.repo.RepositoryUtil.getBytes(RepositoryUtil.java:202)
    at net.sf.jasperreports.engine.JRImageRenderer.getInstance(JRImageRenderer.java:141)     
    at net.sf.jasperreports.engine.fill.JRFillImage.evaluateImage(JRFillImage.java:498)
    at net.sf.jasperreports.engine.fill.JRFillImage.evaluate(JRFillImage.java:441)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:257)
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:468)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2037)     
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:761)     
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportContent(JRVerticalFiller.java:291)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:133)     
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:903)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:813)
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:58)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247)
    at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:878)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Caused by: 
    net.sf.jasperreports.engine.JRException: Error opening input stream from URL : 
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger     
    at net.sf.jasperreports.engine.util.JRLoader.getInputStream(JRLoader.java:314)
    at net.sf.jasperreports.repo.DefaultRepositoryService.getInputStream(DefaultRepositoryService.java:121)
    ... 19 more Caused by: java.io.FileNotFoundException: 
    https://api.twitter.com/1/users/profile_image?screen_name=CPTCurtisHervey&size=bigger     
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1401)     
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
    at java.net.URL.openStream(URL.java:1029)     
    at net.sf.jasperreports.engine.util.JRLoader.getInputStream(JRLoader.java:310)... 20 more 
    Print not filled. Try to use an EmptyDataSource...

How can i handle this situation in the jrxml file?

I would like to simply add a fixed URL address in case it can't find one.

Anyone has any suggestions?

Thank you!

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论， 你可以免费 注册 一个本站的账号。

评论（3）

泪痕残 2024-12-25 17:51:11

我认为您需要添加一个额外的帮助器类来处理这个问题。您需要一个静态方法 boolean urlExists(String url) ，它允许您将其放入 imageExpression 中：

MyClass.urlExists($F{image_url}) ? $F{image_url} : $P{fallback_image}

这将是一个编写起来很简单的类...但显然在添加另一个 . jar 文件。如果没有该方法，我看不到任何在 .jrxml 中进行处理的方法。

I think you need to add an additional helper class to handle this. You need a static method boolean urlExists(String url) that would allow you to put this in the imageExpression:

MyClass.urlExists($F{image_url}) ? $F{image_url} : $P{fallback_image}

It would be a simple class to write... but clearly there's additional complexity in adding in another .jar file. Without that method, I can't see any way to do the processing in the .jrxml.

回复 原文
帅气称霸 2024-12-25 17:51:11

在 jrxml 文件中，
要显示来自 url 资源的图像，请使用图像表达式 URL()

如下所示，例如 $F{ADPN_NO} 是

<imageExpression><![CDATA[new URL("http://anyserver:7001/images/"+$F{ADPN_NO}+".jpg")]]></imageExpression>

onError 时 报告中的参数发生时，它将显示 jrxml 上设置的空白项目、图标或错误。

另一种方式，在 jrxml 文件之外，您可以使用包含 img url 的 java 地图对象，该对象由 URL() 或 File() Exception 检查。

in jrxml file,
to show image from url resource, use image expression URL()

like below, for example $F{ADPN_NO} is parameter from report

<imageExpression><![CDATA[new URL("http://anyserver:7001/images/"+$F{ADPN_NO}+".jpg")]]></imageExpression>

when onError occurred, it will show blank item, icon, or error that is set on jrxml.

the other way, outside of jrxml file, you can use java map object which contains img urls that is check by URL() or File() Exception ..

回复 原文
我为君王 2024-12-25 17:51:11

就我而言，我有一个报告，我“注入”了图像的 url，它导致了证书错误（我“注入”的 url 有 IP，它必须是证书的名称）。我更改了网址后它就起作用了。

In my case I had a report to which I "injected" the image's url and it was causing an error with the certificate (the url I was "injecting" had the IP and it had to be a name for the certificate). After I changed the url it worked.

回复 原文
~没有更多了~

关于作者

江湖彼岸

暂无简介

文章
评论
26 人气
发私信

相关话题

更多

热门标签

操作系统 程序设计 IT运维 Linux系统管理 JavaScript 服务器应用 solaris C/C++ PHP Shell BSD Vue.js aix Oracle Python HTML 系统管理 HTML5 CSS 前端
更多

推荐作者

愿与i

文章 0 评论 0

♡⃝ 酴醾

文章 0 评论 0

晚安先生.

文章 0 评论 0

123

文章 0 评论 0

时光清浅

文章 0 评论 0

避讳

文章 0 评论 0

更多

友情链接

文江博客
    我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站，即表示您同意使用 Cookies 和您的相关数据。
    原文