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2N3700 Datasheet | Semicoa Semiconductor
Part No. : 2N3700
Description : Type 2N3700 Geometry 4500 Polarity NPN
Download : 2N3700 Click to Download
Page Number : 2
Manufacturer : Semicoa Semiconductor
File Size : 45 Kb

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"We tried to include graphic and web promotion, including many other ways, but the effect has not met our expectations." Lijiang Feng said: "Google keyword advertising advantage is overwhelming. It makes precision targeting and delivery word of mouth marketing, we become the decision-maker. "accurate advertising and word of mouth, which is perhaps the public comment networks" successful recipes. " Beijing, China - the worlds leading independent provider of data integration software provider Informatica Corp. has officially launched the "untie the knot of IT: development of a comprehensive data integration strategy" white paper. The initiative aims to help Chinese enterprises to reduce the complexity of data integration to achieve a comprehensive data integration, providing users to improve operational efficiency and optimize IT infrastructures, to reduce spending costs and maximize business value and purpose.
Of course not, now has a new trend, Java programs are beginning to use XML configuration file format, used to be using similar windows in the INI format. Using the XML configuration file as Java has many advantages, from the Tomcat installation and configuration files and configuration files J2ee, we have seen widespread application of XML, let us also follow the trend to use XML armed. The key now is how to read XML configuration files? There are several XML parser: DOM and the main SAX, Zai apaches XML project group, there are several development Xerces Xalan Cocoon XML related technologies project.Tomcat itself using Suns JAXP, XSL Taglib project and its use Xerces parser. Well, the above theoretical problems are more annoying, or cut up to read XML configuration file it. In our program, usually have some basis determined by the host environment variable. Such as database access user name and password, different hosts may be set different. Just change the XML configuration file, you can work properly. myenvdatasourcedbhost localhost / dbhostdbname sqlname / dbnamedbuser username / dbuserdbpassword password / dbpassword / datasource / myenv the above myenv.xml tomcat configuration file is usually placed in the WEB-INF/classes directory. We direct the preparation of a Java program to read, to dbhost dbuser dbpassword extract used for other programs to access the database. Comparison of current multi-SAX, and DOM is the main difference is that SAX reads the XML document line by line analysis, suitable for large files, DOM is read into memory once, obviously can not deal with large files. Here we use SAX parsing, the SAX parser continuously in development, there are many online article is for older versions. If you are using JDK1.4, you can refer to XML documents using SAX processing the article. This procedure is based on its improved and come through the practice of commissioning. Read on the above Java program myenv.xml: import org.xml.sax.Attributes; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.SAXException; import java.util.Properties; / / use DefaultHandler the advantage of not listing all methods, public class ConfigParserextends DefaultHandler {//// define dbhost dbuser dbpassword Properties used to store the value of private Properties props; private String currentSet; private String currentName; private StringBuffercurrentValue = new StringBuffer; / / Builder initialization propspublic ConfigParser {this.props = new Properties;} public Properties getProps {return this.props;} / / start parsing the definition of elements. Here is the name of xxx xxx extracted. public void startElementthrows SAXException {currentValue.delete); this.currentName = qName;} / / Here is the xxx / xxx to the value between the currentValuepublic void characters throws SAXException {currentValue.append;} / / in the face / xxx end , will correspond to the previous name and the value stored in the props in the public void endElementthrows SAXExcep

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