输入sql语句，将结果写入到xml文件

Posted 2020-07-11 你是那天边突然划过的一道闪电

import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

/*
 * @ author Roger
 * @date 2016/5/3
 * @description 输入sql语句，将结果写入到xml文件。文件格式按数据库的字段名，字段值格式。
 * */
public class pXML {
    public static void main(String args[]) throws Exception{
        Connection conn = null;
        String sql;
        String url = "jdbc:mysql://localhost:3306/test?"
                + "user=root&password=root&useUnicode=true&characterEncoding=UTF8";
        try{
            Class.forName("com.mysql.jdbc.Driver");
            System.out.println("成功加载MySQL驱动程序");
            conn = DriverManager.getConnection(url);
            Statement stmt = conn.createStatement();
            sql = "select * from people";
            ResultSet rs = stmt.executeQuery(sql);
            System.out.println("查询人员资料：");
            
            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();  
            Document doc = builder.newDocument();
            Element root = doc.createElement("Info");
            doc.appendChild(root);
            
            while(rs.next()){
                Element people = doc.createElement("People");
                System.out.println(rs.getString(1) + "\t" + rs.getString(2) + "\t" + rs.getString(3) + "\t" + rs.getString(4));
                Element no = doc.createElement("no"); 
                no.appendChild(doc.createTextNode(rs.getString(1)));
                people.appendChild(no);
                Element name = doc.createElement("name"); 
                name.appendChild(doc.createTextNode(rs.getString(2)));
                people.appendChild(name);
                Element sex = doc.createElement("sex"); 
                sex.appendChild(doc.createTextNode(rs.getString(3)));
                people.appendChild(sex);
                Element age = doc.createElement("age"); 
                age.appendChild(doc.createTextNode(rs.getString(4)));
                people.appendChild(age);
                root.appendChild(people);
            }
            TransformerFactory tf = TransformerFactory.newInstance();
            try{
                Transformer t = tf.newTransformer();
                t.setOutputProperty(OutputKeys.INDENT,"yes");
                t.setOutputProperty(OutputKeys.METHOD,"xml");
                t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount","2");
                t.transform(new DOMSource(doc),new StreamResult(new FileOutputStream("d:\\sql.xml")));  //执行上面的设置并且输出到文件中
                System.out.println("生成XML文件成功!");
            }catch(Exception e){
                e.printStackTrace();
            }
        }catch(SQLException e){
            System.out.println("MySql操作错误");
            e.printStackTrace();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            conn.close();
        }
    }
}