java读取properties资料的方法

java读取properties文件的方法
1：使用apache.commons组件。

需要使用jar包：commons-configuration-1.3.jar，commons-lang-2.3.jar，commons-collections.3.2.jar，commons-logging.jar

public class ConfigReader {

private static ConfigReader instance =new ConfigReader();
public static Configuration config ;
private ConfigReader(){
try{
config = new PropertiesConfiguration("test.properties");
}catch(NestableRuntimeException e2){
System.out.println("properties read error...");
}catch(ConfigurationException e3){
System.out.println("properties read error...");
}
}

public static  ConfigReader getInstance(){
return instance ;
}

public static void main(String args[]) throws RemoteException, NestableRuntimeException, ConfigurationException {
System.out.println(ConfigReader.getInstance().config.getProperty("userid"));
}
}

2：使用java.util.ResourceBundle的getBundle()方法读取properties文件来获取值

public class ResourceBundleReader {
public final static Object initLock = new Object();

private final static String PROPERTIES_FILE_NAME = "property";

private static ResourceBundle bundle = null;

static {
try {
if (bundle == null) {
synchronized (initLock) {
if (bundle == null)
bundle = ResourceBundle.getBundle(PROPERTIES_FILE_NAME,Locale.CHINA);
}
}
} catch (Exception e) {
System.out.println("读取资源文件property_zh.properties失败!");
}
}
public static ResourceBundle getBundle() {
return bundle;
}
public static void setBundle(ResourceBundle bundle) {
bundle = bundle;
}


}
3:springMVC的话

<!-- 应用属性文件读入 org.springframework.beans.factory.config.PropertyPlaceholderConfigurer --><bean id="applicationProperties" value="true"/>        <property name="locations">            <list><value>classpath:/jdbc.properties</value><value>classpath:/redis.properties</value>      <value>classpath:/application.properties</value>                          </list>        </property>    </bean>

package com.kuke.core.util;import java.util.HashMap;import java.util.Map;import java.util.Properties;import org.springframework.beans.BeansException;import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;public class PropertiesHolder extends PropertyPlaceholderConfigurer {private static Map<String, Object> ctxPropertiesMap;@Overrideprotected void processProperties(ConfigurableListableBeanFactory beanFactoryToProcess,Properties props) throws BeansException {super.processProperties(beanFactoryToProcess, props);ctxPropertiesMap = new HashMap<String, Object>();for (Object key : props.keySet()) {String keyStr = key.toString();String value = props.getProperty(keyStr);ctxPropertiesMap.put(keyStr, value);}}public static Object getContextProperty(String name) {return ctxPropertiesMap.get(name);}}

4：利用java.util.Properties

InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("ipConfig.properties");     Properties p = new Properties();     try {      p.load(inputStream);     } catch (IOException e1) {      e1.printStackTrace();     }   System.out.println("ip:"+p.getProperty("ip")+",port:"+p.getProperty("port"));  

5：使用java.util.PropertyResourceBundle类的构造函数
示例： InputStream in = new BufferedInputStream(new FileInputStream(name));
ResourceBundle rb = new PropertyResourceBundle(in);

6：使用class变量的getResourceAsStream()方法
示例： InputStream in = JProperties.class.getResourceAsStream(name);
Properties p = new Properties();
p.load(in);

7：使用class.getClassLoader()所得到的java.lang.ClassLoader的getResourceAsStream()方法
示例： InputStream in = JProperties.class.getClassLoader().getResourceAsStream(name);
Properties p = new Properties();
p.load(in);

8：使用java.lang.ClassLoader类的getSystemResourceAsStream()静态方法
示例： InputStream in = ClassLoader.getSystemResourceAsStream(name);
Properties p = new Properties();
p.load(in);

补充

Servlet中可以使用javax.servlet.ServletContext的getResourceAsStream()方法
示例：InputStream in = context.getResourceAsStream(path);
Properties p = new Properties();
p.load(in);

查看更多 下一篇