Article Tags
Article Tags
Apache Commons Configuration reads xml configuration
In a recent project, I hand-written a string connection pool. Because the environments are different, there are development versions, test versions, and online versions, and the database used by each version is also different. Therefore, it is necessary to flexibly switch database connections. Of course this can be solved using maven. The Apache Commons Configuration framework is mainly used to parse database connection strings.
Feb 17, 2017 pm 03:33 PM
java operation properties configuration file
There is a class Properties (Java.util.Properties) in Java, which is mainly used to read Java configuration files and store some values that may need to be changed in properties for configuration. It is usually a .properties file, which is actually ordinary text. File, the format of the file content is the "key=value" format, and the text annotation information can be annotated with "#". Try to use UTF-8 format for storage. The classes provided by jdk itself have shortcomings, so we usually use the commons-configuration framework for analysis.
Feb 17, 2017 pm 03:31 PM
android XPath parsing xml
XPath is a language for finding information in XML documents. XPath can be used to traverse elements and attributes in XML documents.
Feb 17, 2017 pm 03:26 PM
Be careful with the XmlPullParser.netText() method
There is a bug in the implementation of Xml.newPullParser() calling nextText(), nextText() does not always execute before END_TAG as mentioned in the documentation.
Feb 17, 2017 pm 03:24 PM
android pull creates xml file
The generated xml is not formatted, that is, there are no line breaks, tabs and other formatting auxiliary symbols such as the following.
Feb 17, 2017 pm 03:19 PM
Android pull parsing xml method
Pull parses XML files. Like Sax and DOM, it can be used independently of Android. The principles of Pull and Sax are the same. The difference is that after Pull reads the XML file, the calling method returns a number.
Feb 17, 2017 pm 03:17 PM
android sax creates xml file
The first two articles briefly explained the way sax parses xml and implemented the parsing function. Next use sax to create the xml file.
Feb 17, 2017 pm 03:16 PM
android sax parsing xml method
SAX is an xml parser that has fast parsing speed and takes up little memory. It is very suitable for mobile devices such as Android. SAX uses event-driven parsing of XML files, that is to say, it does not need to parse the entire document. In the process of parsing the document in content order, SAX will determine whether the characters currently read are legal or not in a certain part of the XML syntax. If it matches, the event will be triggered. The so-called events are actually some callback methods. These methods (events) are defined in the ContentHandler interface. The following are some commonly used methods of the ContentHandler interface:
Feb 17, 2017 pm 03:12 PM
android sax parses xml files (2)
In the previous article, we briefly introduced a way for SAX to parse XML. It is implemented by inheriting the defaultHandler method and rewriting several of its methods.
Feb 17, 2017 pm 03:09 PM
Create xml in android dom way
In the article on how Android DOM parses XML, the application of DOM parsing XML is briefly introduced. Today, based on the original article, let’s talk about the application of dom to create xml in Android.
Feb 17, 2017 pm 03:03 PM
Android dom parses xml method
A set of interfaces are defined for parsed versions of XML documents. The parser reads in the entire document and builds a memory-resident tree structure that code can then manipulate using the DOM interface. Advantages: The entire document tree is in memory, easy to operate; supports multiple functions such as deletion, modification, and rearrangement; Disadvantages: Transferring the entire document into memory (including useless nodes) wastes time and space; Usage occasions: Once parsed Documents also need to access this data multiple times; hardware resources are sufficient (memory, CPU).
Feb 17, 2017 pm 03:02 PM
Introduction of XML and difference from html
This article describes the details of the introduction of XML and the difference with html. Friends in need can refer to it.
Feb 16, 2017 pm 03:45 PM
xml function and syntax
There are some special characters built into xml, which cannot be directly output by the browser as they are. If you want these special characters to be output to the browser as they are, escape these special characters. The characters after escaping are called escape bytes.
Feb 16, 2017 pm 03:43 PM
Introduction to JAXP parsing of xml parsing methods
A while ago, I made a project where the 2G module is used as a client to access the Internet through the built-in protocol stack. I was only responsible for the library files, and the implementation of the business layer was completed by others. Here I would like to make a summary of the problems encountered during the process, which can be regarded as study notes. Note: The following content is the result of my own thinking during the work process and asking for advice from senior engineers. If there is any infringement, please contact me. First of all, I want to talk about what a built-in protocol stack is. To put it bluntly, the TCP/IP protocol stack has been integrated inside the module. Developers only need to call the AT command interface provided by the module supplier to send and receive data.
Feb 16, 2017 pm 03:41 PM
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