java读取xml配置文件和properties配置文件

1.读取xml

使用dom4j解析xml  下载地址：http://sourceforge.net/projects/dom4j/files/

1. import org.dom4j.Document;  
2. import org.dom4j.Element; 
3. import org.dom4j.io.SAXReader;

try {  
            File f = new File(filename);  
            if (!f.exists()) {  
                System.out.println("  Error : Config file doesn't exist!");  
                System.exit(1);  
            }  
            SAXReader reader = new SAXReader();  
            Document doc;  
            doc = reader.read(f);  
            Element root = doc.getRootElement();  
            Element data;  
            Iterator<?> itr = root.elementIterator("VALUE");  
            data = (Element) itr.next();  
  
            config.server = data.elementText("server").trim();  
            config.user = data.elementText("user").trim();  
            config.pass = data.elementText("pass").trim();  
            config.port = data.elementText("port").trim();  
            config.dbname = data.elementText("dbname").trim();  
  
        } catch (Exception ex) {  
            System.out.println("Error : " + ex.toString());  
        }  

 

测试xml

<?xml version="1.0" encoding="UTF-8"?>  
<CONFIG>  
    <VALUE>  
        <!-- mysql连接设置 -->  
        <server>127.0.0.1</server>  
        <dbname>users</dbname>  
        <user>root</user>  
        <pass>pass</pass>  
        <port>3306</port>  
    </VALUE>  
</CONFIG> 

2.读取properties

Properties prop = new Properties();
//        ClassLoader classLoader = this.getClass().getClassLoader();
//        InputStream is = classLoader.getResourceAsStream("/healthfile.properties");
        //spring中
        ServletContext context = this.getServletContext();
        InputStream is = context.getResourceAsStream("/WEB-INF/classes/healthfile.properties");
        //javase
        //InputStream is = this.getClass().getResourceAsStream("/resource/sqlAddress.properties");
        prop.load(is);
        is.close();
        String implClass = prop.getProperty("impl.class");
        String statichtmlLocalRootPath = prop.getProperty("statichtml.local.rootPath");