Phoenix Jdbc 連接HBase

注意：

   1、插入不是insert 而是upsert

      2、需要手動commit（）

public class Phoenix {
	private Connection conn;
	private Statement sm;

	// 用於初始化連接
	public void parpare() {
		try {
	conn = DriverManager.getConnection("jdbc:phoenix:master,node1,node2:2181");
			sm = conn.createStatement();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// 表格創建
	public void createTable() {
		try {
			sm.executeUpdate("create table p_student (s_id integer not null"+ 
			"primary key,s_name varchar,age integer)");
			sm.executeUpdate("create table p_court (c_id integer not null "+
			"primary key,c_name varchar)");
			sm.executeUpdate(
				"create table p_student_court (s_id integer not null ,c_id "+
				"integer not null,score integer,constraint scfk" 
				+"primary key(s_id,c_id))");
			conn.commit();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// 插入數據
	public void update() {
		try {
	sm.executeUpdate("upsert into p_student values(1,'張三',20)");
	sm.executeUpdate("upsert into p_student values(2,'李四',30)");
	sm.executeUpdate("upsert into p_student values(3,'王五',28)");

	sm.executeUpdate("upsert into p_court values(1,'英語')");
	sm.executeUpdate("upsert into p_court values(2,'語文')");
	sm.executeUpdate("upsert into p_court values(3,'數學')");
	sm.executeUpdate("upsert into p_court values(4,'歷史')");

	sm.executeUpdate("upsert into p_student_court values(1,2,80)");
	sm.executeUpdate("upsert into p_student_court values(2,1,95)");
	sm.executeUpdate("upsert into p_student_court values(3,2,68)");
	sm.executeUpdate("upsert into p_student_court values(1,3,88)");
	sm.executeUpdate("upsert into p_student_court values(2,2,78)");
	sm.executeUpdate("upsert into p_student_court values(3,1,98)");
			conn.commit();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// 查詢數據
	public void selectAll() {
		try {
	ResultSet rs = sm.executeQuery("select * from  p_student where S_ID=1");
			ResultSet rs1 = sm.executeQuery("select * from  p_court");
			ResultSet rs2 = sm.executeQuery("select * from  p_student_court");

			while (rs.next()) {	System.out.println(rs.getInt(1) + "," 
			+ rs.getString(2)"
			+ "," + rs.getInt(3));
			}
			System.out.println("---------------我是華麗的分割線------");
			while (rs1.next()) {
				System.out.println(rs1.getInt(1) + "," + rs1.getString(2));

			}
			System.out.println("--------------我是華麗的分割線-------------");
			while (rs2.next()) {
				System.out.println(rs2.getInt(1) + "," + rs2.getInt(2)"
				+ "," + rs2.getInt(3));
			}

		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// 多表關聯
	public void Join() {
		try {

			ResultSet rs = sm.executeQuery(
					"select a.s_name,c.c_name,b.score " 
					 + " from p_student a " 
					 + " inner join p_student_court b "
					 + " on a.s_id = b.s_id " 
					+ " inner join  p_court c "
					+ " on b.c_id=c.c_id");
			while (rs.next()) {
				System.out.println(rs.getString(1) + "," 
				+ rs.getString(2) + "," + rs.getInt(3));
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
    //刪除數據
	public void delete() {
		try {

			sm.executeUpdate(" delete from  P_COURT where C_ID = 2");
			System.out.println("刪除成功");

		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// 用於關閉資源
	public void end() {

		try {
			sm.close();
			conn.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		Phoenix p = new Phoenix();
		p.parpare();
		// p.createTable() ;
		// p.update();
		// p.selectAll() ;
		// p.Join();
		p.delete();

		p.end();
	}

}