java常用解析properties、xml文件方法

心已赠人 2022-05-20 05:45 266阅读 0赞

mail.properties文件如下:

mail_smtp_host=smtp.163.com
    mail_smtp_auth=true

java解析properties代码如下:

import java.io.IOException;
    import java.io.InputStream;
    import java.util.Properties;
    
    public class MailConfig {
    	public static String host;
    	public static String auth;
    	
    	 static {
    		Properties pro=new Properties();
    		InputStream is=MailConfig.class.getClassLoader().getResourceAsStream("mail.properties");
    		try {
    			pro.load(is);
    			is.close();
    			System.out.println(pro.getProperty("mail_smtp_host"));
    			System.out.println(pro.getProperty("mail_smtp_auth"));
    		} catch (IOException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}		
    	}
    	public static void main(String []args){
    		MailConfig mail=new MailConfig();
    	}
    
    }

mail.xml文件如下:

<?xml version="1.0" encoding="UTF-8"?>
    <bookStore>
       <book id="1">
            <name>冰与火之歌</name>
            <author>乔治马丁</author>
            <year>2014</year>
            <price>89</price>
        </book>
        <book id="2">
            <name>安徒生童话</name>
            <year>2004</year>
            <price>77</price>
            <language>English</language>
        </book>    
    </bookStore>

java解析xml文件代码:

import java.io.File;
    import java.net.MalformedURLException;
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
    import org.dom4j.Attribute;
    import org.dom4j.Document;
    import org.dom4j.DocumentException;
    import org.dom4j.Element;
    import org.dom4j.io.SAXReader;
    public class DOM4JTest {
        private static ArrayList<Object> bookList = new ArrayList<Object>();
        /**
         * @param args
         */
        public static void main(String[] args) {
            // 解析books.xml文件
            // 创建SAXReader的对象reader
            SAXReader reader = new SAXReader();
            try {
                // 通过reader对象的read方法加载books.xml文件,获取docuemnt对象。
                Document document = reader.read(new File("src/main/resources/book.xml"));
                // 通过document对象获取根节点bookstore
                Element bookStore = document.getRootElement();
                // 通过element对象的elementIterator方法获取迭代器
                Iterator it = bookStore.elementIterator();
                // 遍历迭代器，获取根节点中的信息（书籍）
                while (it.hasNext()) {
                    System.out.println("=====开始遍历某一本书=====");
                    Element book = (Element) it.next();
                    // 获取book的属性名以及 属性值
                    List<Attribute> bookAttrs = book.attributes();
                    for (Attribute attr : bookAttrs) {
                        System.out.println("属性名：" + attr.getName() + "--属性值："
                                + attr.getValue());
                    }
                    Iterator itt = book.elementIterator();
                    while (itt.hasNext()) {
                        Element bookChild = (Element) itt.next();
                        System.out.println("节点名：" + bookChild.getName() + "--节点值：" + bookChild.getStringValue());
                    }
                    System.out.println("=====结束遍历某一本书=====");
                }
            } catch (DocumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

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