java 读取数据库数据转化输出XML输出在jsp页面

Posted 2021-12-28 july7

因为老师实验报告要求,搭建服务端解析XML

下面代码实现转化XML格式也是在网上找的转化代码

输出在jsp页面以便于客户端解析是自己写的

一个类就解决了Test

package tests;
//三只坚果
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.apache.crimson.tree.XmlDocument;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;

public class Test

static Connection conn=null;
static String sql;
static String url="jdbc:mysql://localhost:3306/mhf";

public static void main(String[] args)
	Test test=new Test();
	 test.xmlShow();


	public String xmlShow() 
		String comps = null;
		try  // 链接数据库，取得数据
				// Class.forName("oracle.jdbc.driver.OracleDriver");//oracle数据库
			Class.forName("com.mysql.jdbc.Driver");// mysql数据库

			conn = DriverManager.getConnection(url, "root", "123");
			Statement st = conn.createStatement();
			ResultSet rs = st.executeQuery("select * from table_name");

			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document doc = builder.newDocument();

			Element comp = doc.createElement("COMP");

			while (rs.next()) 
				Element person = doc.createElement("PERSON");

				Element deptno = doc.createElement("CITY");// 城市
				deptno.appendChild(doc.createTextNode(String.valueOf(rs.getString(1))));
				person.appendChild(deptno);

				Element dname = doc.createElement("WEATHER");// 天气
				dname.appendChild(doc.createTextNode(new Test().xmlReplace(rs.getString(2))));
				person.appendChild(dname);

				Element loc = doc.createElement("TEM");// 温度
				loc.appendChild(doc.createTextNode(new Test().xmlReplace(rs.getString(3))));
				person.appendChild(loc);
				comp.appendChild(person);
			
			rs.close();
			st.close();
			conn.close();
			doc.appendChild(comp);
			/* ((XmlDocument) doc).write(new FileOutputStream("src/weathers.xml")); */

			comps = comp.toString();

			System.out.println(comp);// 打印数据
			System.out.println("操作成功！！！");
		 catch (ClassNotFoundException e) 
			e.printStackTrace();
		 catch (SQLException e1) 
			e1.printStackTrace();
		 catch (ParserConfigurationException e2) 
			e2.printStackTrace();
		 /*
			 * catch (FileNotFoundException e3)  e3.printStackTrace();  catch (IOException
			 * e4)  e4.printStackTrace(); 
			 */
		System.out.print("!!!!!" + comps + "!!!!!");
		return comps;
	
public String xmlReplace(String value)
   //value=value.replace("&", "&");
//   value=value.replace("<", "<");
//   value=value.replace(">", ">");
//   value=value.replace("‘", "‘");
   value=value.replace( "<","<");
   value=value.replace( ">",">");
   value=value.replace( "‘","‘");
// value.replace("""", """);
 
    return value;

　　jsp页面

<%@page import="com.sun.xml.internal.bind.v2.schemagen.xmlschema.Import"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
     <!-- 这个标签很重要 -->
 <xmp>    
<%@ page import="tests.*"%>
<%
    Test te=new Test();
%> 
<%=te.xmlShow()%>
</xmp>

　　转化后输出页面<>不见了后来折腾半小时加了<xmp></xmp>完美解决

三个包别忘了!!!提前祝福端午节快了!!!