Java中用dom4j解析XML信息連接Embedded derby數據庫

package com.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class Demo {
    static Map<String, String> coloumMap = new HashMap<String, String>();

    public static void main(String[] args) throws InstantiationException,
            IllegalAccessException, ClassNotFoundException, SQLException,
            DocumentException {
        SAXReader sax = new SAXReader();// 創建一個SAXReader對象
        Document document = sax.read("src/info.xml");// 獲取document對象,如果文檔無節點，則會拋出Exception提前結束
        Element root = document.getRootElement();// 獲取根節點
        getNodes(root);// 從根節點開始遍歷所有節點
        conDB();
    }

    /**
     * 數據庫連接
     */
    public static void conDB() {
        try {
            Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();// 加載驅動
            Connection conn = DriverManager
                    .getConnection("jdbc:derby:TESTDB;create=true");// 連接數據庫
            Statement st = conn.createStatement();
            String sqlString = "";
            String colString = "";
            for (String string : coloumMap.keySet()) {
                sqlString += string + " " + coloumMap.get(string) + ",";
                colString += string + ",";
            }
            sqlString = sqlString.substring(0, sqlString.length() - 1);
            colString = colString.substring(0, colString.length() - 1);
            sqlString = "(" + sqlString + ")";
            colString = "(" + colString + ")";
            st.execute("create table INFO2" + sqlString);// 建表
            st.executeUpdate("insert into INFO2" + colString
                    + " values ('hello','kitty')");// 插入數據
            st.executeUpdate("insert into INFO2" + colString
                    + "values ('你好','小貓')");// 插入數據
            ResultSet rs = st.executeQuery("select * from INFO2");// 讀取剛插入的數據
            while (rs.next()) {
                String id = rs.getString(1);
                String name = rs.getString(2);
                System.out.println("ID=" + id);
                System.out.println("NAME=" + name);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 從指定節點開始,遞歸遍歷所有子節點
     */
    public static void getNodes(Element node) {
        if (node.getName().equals("元素")) {
            List<Attribute> listAttr = node.attributes();// 當前節點的所有屬性的list
            String key = null;
            String value = null;
            for (Attribute attr : listAttr) {// 遍歷當前節點的所有屬性
                if (attr.getName().equals("元素字典名稱")) {
                    key = attr.getValue();
                }
                if (attr.getName().equals("元素單位")) {
                    value = attr.getValue();
                    if (value.equals("字節")) {
                        value = "VARCHAR(50)";
                    }
                }
            }
            coloumMap.put(key, value);
        }

        // 遞歸遍歷當前節點所有的子節點
        List<Element> listElement = node.elements();// 所有一級子節點的list
        for (Element e : listElement) {// 遍歷所有一級子節點
            getNodes(e);// 遞歸
        }
    }
}

運行以後輸出

ID=hello
NAME=kitty
ID=你好
NAME=小貓

項目中需要添加derby.jar和dom4j.jar
在項目下會生成一個TESTDB的文件夾