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[Java基础]Properties
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代碼如下:
package PropertiesPack;import java.util.Properties;
import java.util.Set;public class PropertiesDemo01 {public static void main(String[] args
){Properties prop
= new Properties();prop
.put("001","Tom");prop
.put("002","Jack");prop
.put("003","Lily");Set<Object> keySet
= prop
.keySet();for (Object key
:keySet
){Object value
= prop
.get(key
);System.out
.println(key
+","+value
);}}}
代碼如下:
package PropertiesPack;import java.util.Properties;
import java.util.Set;public class PropertiesDemo02 {public static void main(String[] args
){Properties prop
= new Properties();prop
.setProperty("001","Tom");prop
.setProperty("002","Jack");prop
.setProperty("003","Lily");System.out
.println(prop
.getProperty("001"));System.out
.println(prop
.getProperty("002"));System.out
.println(prop
.getProperty("004"));Set<String> names
= prop
.stringPropertyNames();for (String key
:names
){String value
= prop
.getProperty(key
);System.out
.println(key
+","+value
);System.out
.println(key
);}System.out
.println(prop
);}
}
代碼如下:
package PropertiesPack;import java.io.*;
import java.util.Properties;public class PropertiesDemo03 {public static void main(String[] args
) throws IOException {myStore();myLoad();}private static void myLoad() throws IOException {Properties prop
= new Properties();FileReader fr
= new FileReader("D:\\JavaDemo\\fw.txt");prop
.load(fr
);fr
.close();System.out
.println(prop
);}private static void myStore() throws IOException {Properties prop
= new Properties();prop
.setProperty("001","Tom");prop
.setProperty("002","Jack");prop
.setProperty("003","Lily");FileWriter fw
= new FileWriter("D:\\JavaDemo\\fw.txt");prop
.store(fw
,null);fw
.close();}}
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