导出Oracle数据库中的表结构、存储过程、函数等

导出Oracle数据库中的表结构、存储过程、函数等

package com.demo.email.util;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class Demo3 {

	public static void main(String[] args) throws Exception {

		Demo3.init(); 
		Demo3.test(); 

	}

	private static String SQL = "SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, U.object_name), U.OBJECT_TYPE "
			+ "FROM USER_OBJECTS U " + "where U.OBJECT_TYPE = 'TABLE' " + "or U.OBJECT_TYPE = 'VIEW' "
			+ "or U.OBJECT_TYPE = 'INDEX' " + "or U.OBJECT_TYPE = 'PROCEDURE' " + "or U.OBJECT_TYPE = 'SEQUENCE' "
			+ "or U.OBJECT_TYPE = 'TRIGGER' " + "or U.OBJECT_TYPE = 'FUNCTION' " + "order by U.OBJECT_TYPE desc";
	
	
	private static final String TYPE_MARK = "-1";

	private static String username = "user1"; // 用户名 
	
	
	// 获得连接对象
	public static  void init() {
			try {
				Class.forName(driver);
				conn1 = DriverManager.getConnection(url, username, password);
			} catch (ClassNotFoundException e) {
				e.printStackTrace();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	
	public static void test() throws Exception {

		
		Demo3.writeMsg(conn1);
		
	}

	public static void writeMsg(Connection conn) throws Exception {
		Statement statement = conn.createStatement();
		String userName = conn.getMetaData().getUserName();
		
		File file = new File("/usr/local/tables/"+ userName +".txt") ;
		if(!file.getParentFile().exists()) {
			file.getParentFile().mkdirs() ;
		}
		BufferedWriter writer = new BufferedWriter(new FileWriter(file)) ;
		
		ResultSet rs = statement.executeQuery(SQL);
		Clob ddl;
		String type = TYPE_MARK;
		int count = 0;
		List<String> list = new ArrayList<String>();
		while (rs.next()) {
			ddl = rs.getClob(1);
			String str = ddl.getSubString(1L, (int) ddl.length()) ;
			System.out.println(str);
			
			if(str.trim().startsWith("CREATE")) {
				writer.write(";");
				writer.flush();
				writer.newLine();
			}
			
			writer.write(str);
			writer.flush();
			writer.newLine();
			if (!rs.getString(2).equals(type)) {
				if (!type.equals(TYPE_MARK)) {
					list.add(type + "," + count);
					type = rs.getString(2);
					count = 1;
				} else {
					type = rs.getString(2);
					count++;
				}
			} else
			count++;
		}
		list.add(type + "," + count);
		rs.close();
		
		statement.close();
		writer.flush();
		writer.newLine();
		
		for (String type1 : list) {
			System.out.print(type1.split(",")[0] + ":" + type1.split(",")[1] + ";");
			writer.write(type1.split(",")[0] + ":" + type1.split(",")[1] + ";");
		}
		writer.flush();
		writer.newLine();
		writer.close();
	}
	
	private static Connection conn1 = null;

	private static String driver = "oracle.jdbc.driver.OracleDriver"; // 驱动

	private static String url = "jdbc:oracle:thin:@192.168.5.12:1521/dba1";

	private static String password = "123456"; // 密码123456


	// 关闭连接
	public static void close() {
		try {
			conn1.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
}