数据库配置文件的读取

Code:

DataBase.properties的内容

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://127.0.0.1:3306/jpetstore

username=root

password=dongguoh

DataBase.xml的内容

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">

<properties>

<comment>PropertiesTest</comment>

<entry key="driver">com.mysql.jdbc.Driver</entry>

<entry key="url">jdbc:mysql://127.0.0.1:3306/jpetstore</entry>

<entry key="username">root</entry>

<entry key="password">dongguoh</entry>

</properties>

下面是测试类

package DataBase;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Iterator;

import java.util.Properties;

import java.util.Set;

public class TestProperties {

public static void main(String[] args) {

TestProperties test=new TestProperties();

test.luanch();

test.luanchXML();

}

private void luanch(){

Properties ppt=new Properties();

try {

String path=this.getClass().getResource("/").getPath();

path=path+"DataBase/DataBase.properties";

FileInputStream fis=new FileInputStream(path);

ppt.load(fis);

fis.close();

Set set=ppt.keySet();

Iterator it=set.iterator();

System.out.println("*********显示的读取DataBase.properties显示的内容*****");

while(it.hasNext()){

String id=(String)it.next();

System.out.println(id+"="+ppt.getProperty(id));

}

System.out.println("另外一种显示方式");

ppt.list(System.out);

} catch (FileNotFoundException e) {

System.out.println("找不到DataBase.properties这个文件，或者是路径发生错误");

} catch (IOException e) {

System.out.println("加载DataBase.properties文件时出错！！");

}

}

private void luanchXML(){

Properties ppt=new Properties();

try {

String path=this.getClass().getResource("/").getPath();

path=path+"DataBase/DataBase.xml";

System.out.println(path);

FileInputStream fis=new FileInputStream(path);

ppt.loadFromXML(fis);

fis.close();

Set set=ppt.keySet();

Iterator it=set.iterator();

System.out.println("*********显示的读取DataBase.xml 显示的内容*****");

while(it.hasNext()){

String id=(String)it.next();

System.out.println(id+"="+ppt.getProperty(id));

}

} catch (FileNotFoundException e) {

System.out.println("找不到DataBase.xml 这个文件，或者是路径发生错误");

} catch (IOException e) {

System.out.println("加载DataBase.xml 文件时出错！！");

}

}

}

结果：

*********显示的读取DataBase.properties显示的内容*****

password=dongguoh

url=jdbc:mysql://127.0.0.1:3306/jpetstore

driver=com.mysql.jdbc.Driver

username=root

另外一种显示方式

-- listing properties --

url=jdbc:mysql://127.0.0.1:3306/jpetstore

password=dongguoh

driver=com.mysql.jdbc.Driver

username=root

/E:/MyJavaProject/Ibatis/WebRoot/WEB-INF/classes/DataBase/DataBase.xml

*********显示的读取DataBase.xml 显示的内容*****

password=dongguoh

url=jdbc:mysql://127.0.0.1:3306/jpetstore

driver=com.mysql.jdbc.Driver

username=root