一段简单的ORCLE分页过程

 

CREATE OR REPLACE PROCEDURE PROC_PAGER(
       tableName IN VARCHAR2,
       pageIndex IN INTEGER :=1,
       pageSize IN INTEGER :=10,
       condition IN VARCHAR2:=' WHERE 1=1 ',
       orderlist IN VARCHAR2:='',
       recountCount OUT INTEGER,
       pageCount OUT INTEGER,
       lresult OUT sys_refcursor
)

AS
       lcount INTEGER;
       sql_recordCount VARCHAR2(2000):='SELECT COUNT(*) FROM {TABLE_NAME} {CONDITION}';
       sql_pager VARCHAR2(2000):='
                SELECT * FROM
                       (
                         SELECT ROWNUM RN,model.* FROM
                                (
                                       SELECT * FROM {TABLE_NAME} {CONDITION} {ORDER_LIST}
                                ) model
                                WHERE ROWNUM<={TOP_COUNT}
                       ) WHERE RN>{PASS_COUNT}';
BEGIN

       --总条数
       sql_recordCount:=REPLACE(sql_recordCount,'{TABLE_NAME}',tableName);
          DBMS_OUTPUT.put_line(condition);
       
       IF (TRIM(condition) IS NOT NULL) THEN
              sql_recordCount:=REPLACE(sql_recordCount,'{CONDITION}',' WHERE ' || LTRIM(LTRIM(UPPER(condition)),'WHERE'));
       ELSE
              sql_recordCount:=REPLACE(sql_recordCount,'{CONDITION}','');
       END IF;
       
       dbms_output.put_line(sql_recordCount);
       
       EXECUTE IMMEDIATE sql_recordCount INTO lcount;
       recountCount:=lcount;
      
       IF (recountCount mod pageSize) = 0 THEN
          pageCount:=recountCount / pageSize;
       ELSE
          pageCount:=FLOOR(recountCount / pageSize) + 1;
       END IF;

       --分页
       sql_pager:=REPLACE(sql_pager,'{TABLE_NAME}',tableName);
       IF (TRIM(condition) IS NOT NULL) THEN
              sql_pager:=REPLACE(sql_pager,'{CONDITION}',' WHERE ' || LTRIM(LTRIM(UPPER(condition)),'WHERE'));
       ELSE
              sql_pager:=REPLACE(sql_pager,'{CONDITION}','');
       END IF;
       IF (orderlist IS NOT NULL) THEN
          sql_pager:=REPLACE(sql_pager,'{ORDER_LIST}',' ORDER BY '|| orderlist);
       ELSE
          sql_pager:=REPLACE(sql_pager,'{ORDER_LIST}','');
       END IF;

       sql_pager:=REPLACE(sql_pager,'{TOP_COUNT}',pageIndex*pageSize);
       sql_pager:=REPLACE(sql_pager,'{PASS_COUNT}',(pageIndex-1)*pageSize);
       DBMS_OUTPUT.put_line(sql_pager);
       OPEN lresult FOR sql_pager;      

END PROC_PAGER;

 

 

测试：

 

DECLARE
  recordCount number;
  pageCount number;
  lresult sys_refcursor;
BEGIN
  PROC_PAGER('PET_TYPE',condition => '1=1',orderlist => 'NAME DESC',recountCount => recordCount,pageCount => pageCount,lresult => lresult);
  dbms_output.put_line('总条数' || recordCount || ' 总页数' || pageCount);

END;

 

Java调用:

/**
	 * @param args
	 * @throws ClassNotFoundException 
	 * @throws SQLException 
	 */
	public static void main(String[] args) throws ClassNotFoundException, SQLException {
		// TODO Auto-generated method stub
		
		Class.forName("oracle.jdbc.driver.OracleDriver");
		Connection c = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","EPET","EPET");
		CallableStatement cst = c.prepareCall("{call PROC_PAGER(?,?,?,?,?,?,?,?)}");
		
		/*
		 * CREATE OR REPLACE PROCEDURE PROC_PAGER(
       tableName IN VARCHAR2,
       pageIndex IN INTEGER :=1,
       pageSize IN INTEGER :=10,
       condition IN VARCHAR2:=' WHERE 1=1 ',
       orderlist IN VARCHAR2:='',
       recountCount OUT INTEGER,
       pageCount OUT INTEGER,
       lresult OUT sys_refcursor
)
		 * */
		cst.setString(1,"PET_TYPE"); //输入参数
		cst.setInt(2, 1);
		cst.setInt(3, 5);
		cst.setString(4, " 1=1 ");
		cst.setString(5, "");
		cst.registerOutParameter(6, Types.INTEGER);
		cst.registerOutParameter(7, Types.INTEGER);
		
		cst.registerOutParameter(8,OracleTypes.CURSOR); //输出参数为结果集参数
		cst.executeQuery();
		ResultSet rs = ((OracleCallableStatement)cst).getCursor(8); //得到输出结果集参数
		System.out.printf("共%d条%d页,当前第%d页\n\n",cst.getInt(6),cst.getInt(7),1);
		if (rs!=null){
			while(rs.next()){
				System.out.println(rs.getInt("id")+"\t"+rs.getString("name"));
			}
		}
		
		rs.close();
		cst.close();
		c.close();


	}