About the configuration class in Java

The properties file is the default configuration file format for the Java platform, with the advantages of a clear format, easy to understand, and simple to read the properties file with Commons-configuration code as follows:

Basic usage:

1. Load the jar package, I use MAVEN auto-load, the Pom.xml configuration is as follows:

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2. <dependency>
4. <groupId>commons-configuration</groupId>
6. <artifactid>commons-configuration</artifactid>
8. <version>1.9</version>
10. </Dependency>
12. <!--commons-configuration automatically loaded is 2.1 version, compile error, so add this--
14. <dependency>
16. <groupId>commons-lang</groupId>
18. <artifactid>commons-lang</artifactid>
20. <version>2.6</version>
22. </Dependency>

Common-lang This package to use the new version, if you do not write this dependency, commons-configuration will download a 2.1 legacy, resulting in a compilation error

2.java Code:

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1. propertiesconfiguration config = new Propertiesconfiguration ("/database.properties");
2. String userName = config.getstring ("name");

In addition to the GetString () method, methods that have different return types, such as Getboolean,getdouble,getinteger, can be called.

Advanced usage:

A project there will be more than one configuration file, then there is a unified profile management class is necessary, I wrote a simple, we can refer to, there is improper usage also please point out

1.java class

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2. Package com.xxx.xxx.util;
6. Import Java.util.HashMap;
8. Import Java.util.Map;
12. Import org.apache.commons.configuration.ConfigurationException;
14. Import org.apache.commons.configuration.PropertiesConfiguration;
16. /**
18. * <p>
20. * Read configuration file class
22. * </p>
24. * <p>
26. * Returns the property contents according to the profile name and the attribute key, Configutil.get (ConfigFile, property);
28. * </p>
30. * @author Shengzhi.rensz
32. *
34. */
36. Public class Configutil {
40. private static Configutil Initor = new Configutil ();
44. private static map<string, object> Configmap = new hashmap<string, object> ();
48. Private Configutil () {}
52. /** 
54. * Get content
56. * @param configfile
58. * @param Property
60. * @return
62. */
64. public static string get (string ConfigFile, String property) {
66. if (!configmap.containskey (configfile)) {
68. Initor.initconfig (ConfigFile);
70. }
72. propertiesconfiguration config = (propertiesconfiguration) configmap.get (configfile);
74. String value = config.getstring (property);
76. //todo LOG
78. return value;
80. }
84. /** 
86. * Load configuration file and add map after initialization
88. * @param configfile
90. */
92. private synchronized void Initconfig (String configfile) {
94. try {
96. propertiesconfiguration config = new propertiesconfiguration (configfile);
98. Configmap.put (configfile, config);
102. } catch (ConfigurationException e) {
104. E.printstacktrace ();
106. }
108. }
110. }

2. Calling methods

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1. Configutil.get ("/common/velocity.properties", "input.encoding");

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1. Public static void ReadProperties () throws ConfigurationException {
2. Propertiesconfiguration pcfg = new Propertiesconfiguration ("config/cfg.properties");
3. System.out.println (pcfg.getstring ("Platform.jre"));
4. }

Note that the path here must be clear, the configuration file is placed in the Config folder;

About the configuration class in Java