JasperReports Java开发实战指南

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"JasperReports for Java Developers - 一本关于如何使用JasperReports库进行报告创建、设计、格式化和导出的开发指南。作者David R. Heffelfinger，出版于2006年，虽然版本较旧，但仍对理解和应用JasperReports有参考价值。" JasperReports是世界上最受欢迎的Java报表库，它允许开发者创建复杂的报表并将其集成到Java应用程序中。这本书《JasperReports for Java Developers》由David R. Heffelfinger撰写，主要面向Java开发者，提供了一个全面的指南，帮助他们掌握JasperReports的各项功能。书中内容可能涵盖了以下几个关键知识点： 1. **JasperReports基础**：介绍JasperReports的基本概念，包括报表结构、元素（如文本框、图像、表格等）、样式和表达式。 2. **报表设计**：讲解如何使用IReport工具来设计报表模板。IReport是JasperReports的图形化界面，用于创建和编辑JRXML文件，它是报表设计的核心部分。 3. **数据源**：介绍如何连接和使用各种数据源，包括关系数据库、XML数据、Java集合以及自定义数据源。 4. **报表布局与格式化**：探讨如何设置单元格样式、页眉和页脚、分组、排序和过滤，以创建专业且有吸引力的报表。 5. **表达式和脚本**：解释JasperReports中的表达式语言以及如何使用JavaScript和其他脚本来增强报表功能。 6. **导出和输出格式**：讨论JasperReports支持的各种导出格式，如PDF、HTML、Excel、CSV等，以及如何定制这些导出格式。 7. **动态报告生成**：介绍如何根据运行时的数据动态改变报表布局和内容。 8. **集成到Java应用**：讲解如何在Java应用程序中嵌入JasperReports，包括Servlet、JSP、Spring等框架下的集成方法。 9. **性能优化**：提供一些提高JasperReports性能的策略和技巧，如缓存机制和大数据量处理。 10. **实战案例**：可能包含一些实际项目中的示例，展示如何解决特定的报表设计和开发问题。尽管这本书的出版时间较早，但JasperReports的核心原理和很多基本功能至今仍然适用。开发者可以通过学习书中的知识，结合最新的JasperReports版本和文档，以适应当前的开发需求。对于想要深入理解和使用JasperReports的Java开发者来说，这仍是一份宝贵的参考资料。

Preface

[ 5 ]

Questions

You can contact us at questions@packtpub.com if you are having a problem with

some aspect of the book, and we will do our best to address it.

An Overview of JasperReports

[ 8 ]

Until recently, JasperReports was basically a one-man project, with Teodor working

on it in his spare time. In April 2005, a company called JasperSoft was formally

launched at the MySQL User Conference in California. JasperSoft sponsors

JasperReports' development, allowing Teodor and other JasperSoft developers to work

full-time on JasperReports. JasperSoft also provides commercial support and services

for JasperReports and related products, including the iReport Visual Designer

for JasperReports. In addition to providing support for JasperReports and iReport,

JasperSoft sells commercial applications incorporating JasperReports.

JasperSoft has raised over 8 million dollars in venture capital funding, no small feat in

these post-dotcom days. This investment is a clear indication that venture capitalists

have condence in the success of JasperSoft, and, by extension, in the success of

JasperReports. According to JasperSoft, JasperReports has been downloaded over

300,000 times, and gets over 20,000 downloads a month. It has been deployed in over

10,000 companies and Independent Software Vendors (ISVs).

What is JasperReports?

JasperReports is an open-source Java class library designed to aid developers

with the task of adding reporting capabilities to Java applications. Since it is not a

standalone tool, it cannot be installed on its own. Instead, it is embedded into Java

applications by including its library in the application's CLASSPATH. JasperReports

is a Java class library, and is not meant for end users, but rather is targeted towards

Java developers who need to add reporting capabilities to their applications.

Although JasperReports is primarily used to add reporting capabilities to web-based

applications via the Servlet API, it has absolutely no dependencies on the Servlet API

or any other Java EE library. It is, therefore, by no means limited to web applications.

There is nothing stopping us from creating standalone desktop or command-line

Java applications to generate reports with JasperReports. After all, JasperReports is

nothing but a Java class library providing an API to facilitate the ability to generate

reports from any kind of Java application.

JasperReports requires a Java Development Kit (JDK) 1.3 or newer in order to

successfully compile applications incorporating the JasperReports Java class

library, and a Java Runtime Environment 1.3 or newer to successfully execute

these applications. Older versions of JasperReports required a JDK to successfully

execute JasperReports applications (strictly speaking, JasperReports required

tools.jar to be in the CLASSPATH, and tools.jar is included in the JDK, not the

JRE). However, from version 0.6.4, JasperReports is bundled with the Eclipse Java

Development Tools (JDT) compiler, and no longer needs a JDK to execute deployed

applications. Examples in this book are developed using JDK 1.5, but should compile

and execute successfully with any JDK or JRE supported by JasperReports.

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