Oracle分页1

create table "t_items"
(
"item_no" varchar2(10) not null enable,
"item_category_id" char(3),
"item_unit_id" char(3),
"item_name" varchar2(20) not null enable,
"spec" varchar2(20),
"pattern" varchar2(20),
constraint "pk_t_items" primary key ("item_no")
)

insert into t_items (item_no,item_category_id,item_unit_id,item_name,spec,pattern) values ('a001','301','402','撒旦发生地方都是','1.x','333.xxx');
insert into t_items (item_no,item_category_id,item_unit_id,item_name,spec,pattern) values ('a002','302','400','头炮','wwww','aaaaa');
insert into t_items (item_no,item_category_id,item_unit_id,item_name,spec,pattern) values ('a003','301','400','康必得','888','99999');
insert into t_items (item_no,item_category_id,item_unit_id,item_name,spec,pattern) values ('a004','300','400','金银花','得淡淡的','淡淡的');
insert into t_items (item_no,item_category_id,item_unit_id,item_name,spec,pattern) values ('a009','300','400','dsfdsf',null,null);

-- 2<= rownum <= 3
select rn, item_no, item_category_id, item_unit_id, item_name, spec, pattern
from
(
select rownum rn, item_no, item_category_id, item_unit_id, item_name, spec, pattern
from t_items
where rownum <=3
)
where rn > 1;

package com.ankangqiao.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
*
* @author Kevin
*
*/
public class ConnectionTest {

/**
* @param args
* @throws ClassNotFoundException
* @throws SQLException
*/
public static void main(String[] args) throws ClassNotFoundException, SQLException {

Connection connection = null;
PreparedStatement preparedStatetment = null;
ResultSet resultSet = null;

try {
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:orcl", "system", "oracleRoot123");
} catch (ClassNotFoundException e) {
e.printStackTrace();
throw e;
} catch (SQLException e) {
e.printStackTrace();
throw e;
}

try {
int pageNumber = 2;
int pageSize = 2;
StringBuilder sql = new StringBuilder();
sql.append("select rn, item_no, item_category_id, item_unit_id, item_name, spec, pattern ")
.append("from ")
.append("( ")
.append("select rownum rn, item_no, item_category_id, item_unit_id, item_name, spec, pattern ")
.append("from t_items ")
.append("where rownum <= ? ")
.append(") ")
.append("where rn > ? ");

preparedStatetment = connection.prepareStatement(sql.toString());
preparedStatetment.setInt(1, pageSize*pageNumber);
preparedStatetment.setInt(2, pageSize*(pageNumber -1));

resultSet = preparedStatetment.executeQuery();

while (resultSet.next()) {
System.out.println(resultSet.getInt("rn") + " " + resultSet.getString("item_no") +
" " + resultSet.getString("item_category_id") + " " + resultSet.getString("item_unit_id") +
" " + resultSet.getString("item_name") + " " + resultSet.getString("spec") +
" " + resultSet.getString("pattern"));
}
} catch (SQLException e) {
e.printStackTrace();
throw e;
} finally {
if (preparedStatetment != null) {
try {
preparedStatetment.close();
} catch (SQLException e) {
e.printStackTrace();
throw e;
} finally {
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
throw e;
} finally {
if (resultSet != null) {
try {
resultSet.close();
} catch (SQLException e) {
e.printStackTrace();
throw e;
}
}
}
}
}
}
}

}

}
/*
*/