如何在 Java 中生成报告？
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How do I generate reports in Java?
提问by user2525364
How do I generate reports in Java using IO?
如何使用 IO 在 Java 中生成报告？
I want to generate PDF files with database records.
我想用数据库记录生成PDF文件。
At the moment I have something like this...
目前我有这样的事情......
try{
ResultSet rs = ps.executeQuery();
while(rs.next()){
FileOutputStream fos = new FileOutputStream("Desktop/Test.pdf");
ObjectOutputStream out = new ObjectOutputStream(fos);
out.writeChars("Name of user: ");
out.writeChars("Age: ");
out.close();
}
}
catch (IOException ioe){
}
It keeps saying that the PDF file is corrupted.
它一直说PDF文件已损坏。
I would greatly appreciate it if someone could help me out here.
如果有人能在这里帮助我，我将不胜感激。
Edit: I do not want to use iReports/JasperReports/iText/other report generators.
编辑：我不想使用 iReports/JasperReports/iText/其他报告生成器。
Many thanks
非常感谢
回答by user_msr_3485950
Try itex API. To use IText PDF API for Java you must first download the IText JAR file from the IText website (http://itextpdf.com/), and include it on your application class path:
试试itex API。要使用适用于 Java 的 IText PDF API，您必须首先从 IText 网站 ( http://itextpdf.com/)下载 IText JAR 文件，并将其包含在您的应用程序类路径中：
回答by Massa
Well, first of all, if you don't want to use any of the java PDF/reporting libraries, you have to understand what is a PDF.
好吧，首先，如果您不想使用任何 java PDF/报告库，您必须了解什么是 PDF。
Start here with an article about the structure of a PDF, then go here for the complete, raw reference of the PDF format.
从这里开始，从一篇关于 PDF 结构的文章开始，然后到这里获取 PDF 格式的完整原始参考。
Hint: this is very hard. PDF is a print/display-oriented format and really complex. Another option is generating an HTML and using some tool to generate the PDF in the end. This is usually easier, as HTML is a far simpler format than PDF.
提示：这很难。PDF 是一种面向打印/显示的格式，非常复杂。另一种选择是生成 HTML 并使用一些工具最终生成 PDF。这通常更容易，因为 HTML 是一种比 PDF 简单得多的格式。
HTH!
哼！
