【Properties文件】Java使用Properties来读取配置文件

配置文件位置及内容

执行结果

程序代码

     
     
     
     

      
      
      
      
package Utils.ConfigFile;
      
      
      
      
 
      
      
      
      
import java.io.BufferedInputStream;
      
      
      
      
import java.io.BufferedReader;
      
      
      
      
import java.io.File;
      
      
      
      
import java.io.FileInputStream;
      
      
      
      
import java.io.InputStream;
      
      
      
      
import java.io.InputStreamReader;
      
      
      
      
import java.util.Enumeration;
      
      
      
      
import java.util.Iterator;
      
      
      
      
import java.util.Map;
      
      
      
      
import java.util.Properties;
      
      
      
      
 
      
      
      
      
public class PropertiesTest {
      
      
      
      
 
      
      
      
      
    /**
      
      
      
      
     * 获取属性文件
      
      
      
      
     * @param path  属性文件路径
      
      
      
      
     * @return
      
      
      
      
     */
      
      
      
      
    public static Properties getPropsFile(String path) {
      
      
      
      
        Properties props = new Properties();
      
      
      
      
        try {
      
      
      
      
            File file = new File(path);
      
      
      
      
            InputStream in = new BufferedInputStream(new FileInputStream(file));
      
      
      
      
 
      
      
      
      
            //解决中午乱码问题--因为字节流无法读取中文，所以采用reader把inputStream转换成reader用字符流来读取中文
      
      
      
      
            BufferedReader bf = new BufferedReader(new InputStreamReader(in));
      
      
      
      
            props.load(bf);
      
      
      
      
            in.close();
      
      
      
      
        } catch (Exception e) {
      
      
      
      
            return null;
      
      
      
      
        }
      
      
      
      
        return props;
      
      
      
      
    }
      
      
      
      
 
      
      
      
      
    /**
      
      
      
      
     * 显示所有键值
      
      
      
      
     * @param properties
      
      
      
      
     */
      
      
      
      
    public static void showKeys(Properties properties){
      
      
      
      
        Enumeration<?> enumeration = properties.propertyNames();
      
      
      
      
 
      
      
      
      
        System.out.println("======下面将显示所有key值============");
      
      
      
      
        while(enumeration.hasMoreElements()){
      
      
      
      
            Object key = enumeration.nextElement();
      
      
      
      
            System.out.println(key);
      
      
      
      
        }
      
      
      
      
    }
      
      
      
      
 
      
      
      
      
    /**
      
      
      
      
     * 显示所有value值
      
      
      
      
     * @param properties
      
      
      
      
     */
      
      
      
      
    public static void showValues(Properties properties){
      
      
      
      
        Enumeration<?> enumeration = properties.elements();
      
      
      
      
 
      
      
      
      
        System.out.println("======下面将显示所有value值============");
      
      
      
      
        while(enumeration.hasMoreElements()){
      
      
      
      
            Object value = enumeration.nextElement();
      
      
      
      
            System.out.println(value);
      
      
      
      
        }
      
      
      
      
    }
      
      
      
      
 
      
      
      
      
    /**
      
      
      
      
     * 显示所有key，value
      
      
      
      
     * @param properties
      
      
      
      
     */
      
      
      
      
    public static void showKeysAndValues(Properties properties){
      
      
      
      
        Iterator<Map.Entry<Object, Object>> it= properties.entrySet().iterator();
      
      
      
      
 
      
      
      
      
        System.out.println("======下面将显示所有<key,value>值---方式1============");
      
      
      
      
        while (it.hasNext()) {
      
      
      
      
            Map.Entry<Object, Object> entry = it.next();
      
      
      
      
            Object key = entry.getKey().toString();
      
      
      
      
            Object value = entry.getValue();
      
      
      
      
            System.out.println("<" + key + "," + value + ">");
      
      
      
      
        }
      
      
      
      
    }
      
      
      
      
 
      
      
      
      
    /**
      
      
      
      
     * 显示所有key，value
      
      
      
      
     * @param properties
      
      
      
      
     */
      
      
      
      
    public static void showKeysAndValues2(Properties properties){
      
      
      
      
        System.out.println("======下面将显示所有<key,value>值--方式2============");
      
      
      
      
        for (Map.Entry<Object, Object> entry: properties.entrySet()) {
      
      
      
      
            Object key = entry.getKey();
      
      
      
      
            Object value = entry.getValue();
      
      
      
      
            System.out.println("<" + key + "," + value + ">");
      
      
      
      
        }
      
      
      
      
    }
      
      
      
      
 
      
      
      
      
    public static void main(String args[]) {
      
      
      
      
        Properties propFile = getPropsFile("C:\\myProperties.properties");
      
      
      
      
 
      
      
      
      
        showKeys(propFile);
      
      
      
      
        showValues(propFile);
      
      
      
      
        showKeysAndValues(propFile);
      
      
      
      
        showKeysAndValues2(propFile);
      
      
      
      
    }
      
      
      
      
}
     
     
     
     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

来自为知笔记(Wiz)

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