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
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