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 (filenotfoundexception 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java 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

以上所述是小编给大家介绍的java 读取、获取配置文件.properties中的数据，希望对大家有所帮助