Java中Properties類的操作

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com.gordon.constant

Constant.java:

package com.gordon.constant;public interface Constant {/*** 根據(jù)名稱讀取常量* @param name* @return*/public String get_constant(String name); }

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SystemConstant4PropImpl.java

package com.gordon.constant;import java.io.IOException; import java.io.InputStream; import java.util.Properties;public class SystemConstant4PropImpl implements Constant {public Properties prop = null;public SystemConstant4PropImpl() {InputStream in = ClassLoader.getSystemResourceAsStream("constant.properties");prop = new Properties();try {prop.load(in);} catch (IOException e) {e.printStackTrace();}}public SystemConstant4PropImpl(String prop_path) {InputStream in = ClassLoader.getSystemResourceAsStream(prop_path);prop = new Properties();try {prop.load(in);} catch (IOException e) {e.printStackTrace();}}/*** 獲取properties文件中的屬性*/@Overridepublic String get_constant(String name) {return prop.getProperty(name);} }

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SystemConstant4XMLImpl.java

package com.gordon.constant;public class SystemConstant4XMLImpl {}

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com.grodon.test

TestConstantClass.java:

package com.gordon.test;import org.junit.Test;import com.gordon.constant.SystemConstant4PropImpl;public class TestConstantClass {@Testpublic void run() {try {SystemConstant4PropImpl scp = new SystemConstant4PropImpl();String db_username = scp.get_constant("db.username");System.out.println(db_username);} catch (Exception e) {e.printStackTrace();}} }

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constant.properties:

db.username=root

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運行結(jié)果：

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轉(zhuǎn)載于:https://www.cnblogs.com/hfultrastrong/p/7611536.html

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