| 词条 | OGNL |
| 释义 |
| name = OGNL | screenshot = | caption = | developer = OGNL Technology | latest release version = 3.0.8 | latest release date = {{release date|2013|09|24}} | operating system = Cross-platform | platform = Java Virtual Machine | programming language = Java | genre = Expression Language (EL) | license = BSD License | website = http://commons.apache.org/ognl/ }} Object-Graph Navigation Language (OGNL) is an open-source Expression Language (EL) for Java, which, while using simpler expressions than the full range of those supported by the Java language, allows getting and setting properties (through defined setProperty and getProperty methods, found in JavaBeans), and execution of methods of Java classes. It also allows for simpler array manipulation. It is aimed to be used in Java EE applications with taglibs as expression language. OGNL was created by Luke Blanshard and Drew Davidson of OGNL Technology.[1] OGNL development was continued by OpenSymphony, which closed in 2011.[2] OGNL is developed now as a part of the Apache Commons. OGNL TechnologyOGNL began as a way to map associations between front-end components and back-end objects using property names. As these associations gathered more features, Drew Davidson created Key-Value Coding language (KVCL). Luke Blanshard then reimplemented KVCL using ANTLR and started using the name OGNL. The technology was again reimplemented using the Java Compiler Compiler (JavaCC). OGNL uses Java reflection and introspection to address the Object Graph of the runtime application. This allows the program to change behavior based on the state of the object graph instead of relying on compile time settings. It also allows changes to the object graph. Projects using OGNL
OGNL security issuesDue to its ability to create or change executable code, OGNL is capable of introducing critical security flaws to any framework that uses it.{{cn|date=September 2017}} Multiple Apache Struts 2 versions have been vulnerable to OGNL security flaws.[3] As of October 2017, the recommended version of Struts 2 is 2.5.13.[4] Users are urged to upgrade to the latest version, as older revisions have documented security vulnerabilities — for example, Struts 2 versions 2.3.5 through 2.3.31, and 2.5 through 2.5.10, allow remote attackers to execute arbitrary code.[5] See also{{Portal|Java (programming language)|Free and open-source software}}
External links
References1. ^{{citation |url=http://www.ognl.org/ |title=ognl.org| archiveurl=https://web.archive.org/web/20081025020323/http://www.ognl.org/ |archivedate=25 October 2008 |work=OGNL Technology, Inc|accessdate=5 November 2013}} {{compu-lang-stub}}2. ^{{cite web|title=OpenSymphony, RIP (2000 - 2011)|url=http://www.opensymphony.com/|work=Open Symphony|accessdate=1 June 2011|deadurl=yes|archiveurl=https://web.archive.org/web/20130905011554/http://www.opensymphony.com/|archivedate=5 September 2013|df=}} 3. ^{{cite web |url=https://www.cvedetails.com/vulnerability-list/vendor_id-45/product_id-6117/Apache-Struts.html |title=Apache Struts : List of security vulnerabilities |website=cvedetails.com |accessdate=October 2, 2017}} 4. ^{{cite web |url=https://struts.apache.org/downloads.html |title=Apache Struts Releases |website=struts.apache.org |accessdate=October 2, 2017}} 5. ^{{cite web |url=https://arstechnica.com/security/2017/03/critical-vulnerability-under-massive-attack-imperils-high-impact-sites/ |title=Critical vulnerability under “massive” attack imperils high-impact sites [Updated] |first=Dan |last=Goodin |website=Ars Technica |date=March 9, 2017 |accessdate=October 2, 2017}} 3 : Scripting languages|Free software programmed in Java (programming language)|Java platform |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。