Java 读取、获取配置文件.properties中的数据

Java 读取、获取配置文件.properties中的数据

java获取配置文件.properties中的数据，具体内容如下所示：

方法太多，只写一种比较简单的。

文件test1.properties内容

test1 = 123;

test2=3211

Properties prop = new Properties();

prop.load(new FileInputStream("src/test1.properties"));

System.out.println(prop.get("test1"));

输出

123;1

简单封装一下，完整代码

package propertis.test;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Properties;

public class Test {

/**

* @param args

* @throws IOException

* @throws FileNotFoundException

*/

public static void main(String[] args) throws FileNotFoundException, IOException {

// TODO Auto-generated method stub

Properties prop = new Properties();

prop.load(new FileInputStream("src/test1.properties"));

System.out.println(prop.get("test1"));

System.out.println(ProUtil.getTest1Value("test1"));

System.out.println(ProUtil.getTest1Value("test2"));

}

}

class ProUtil{

private static Properties prop = new Properties();

static{

try {

prop.load(new FileInputStream("src/test1.properties"));

} catch (FjKGxhfeileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public static Object getTest1Value(String key){

return prop.get(key);

}

}

输出

123;

123;

321

下面看下Javahttp:// 读取Properties配置文件

方法：

Properties properties = new Properties();

FileInputStream in = new FileInputStream("**.properties");

properties.load(in);

in.close();

配置文件：

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8

username=root

password=

代码实现：

import java.io.FileInputStream;

import java.util.Properties;

public class PropertiesTest {

private static final String PROPERTIES_NAME = "db.properties";

public static String DB_DRIVER = null;

public static String DB_URL = null;

public static String DB_USER = null;

public static String DB_PWD = null;

static{

FileInputStream in = null;

try{

Properties properties = new Properties();

in = new FileInputStream(PROPERTIES_NAME);

properties.load(in);

DB_DRIVER = properties.getProperty("driver");

DB_URL = properties.getProperty("url");

DB_USER = properties.getProperty("username");

DB_PWD = properties.getProperty("passworld");

System.out.println("读取配置信息成功！");

showConfig();

}catch(Exception e){

e.printStackTrace();

System.out.println("读取配置信息失败！");

}finally{

if(in != null){

try{

in.close();

}catch(Exception e){

e.printStackTrace();

}

}

}

}

private static void showConfig(){

System.out.println("-----------------------配置信息-----------------");

System.out.println("dirver: "+DB_DRIVER);

System.out.println("url: "+DB_URL);

System.out.println("user: "+DB_USER);

System.out.println("passworld: "+DB_PWD);

System.out.println("----------------------------------------------");

}

public static void main(String[] args){

}

}

运行结果：

读取配置信息成功！

-----------------------配置信息-----------------

dirver: com.mysql.jdbc.Driver

url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8

user: root

passworld: null

----------------------------------------------

总结

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