ストアドプロシージャを呼び出すJDBC
そして、パラメータの戻り値を使用してモードを出します
//存储过程为sum_sal(deptno department.deptno%type,sum in out number)
CallableStatement cs =conn.prepareCall("{call sum_sal(?,?)}");
cs.setInteger(1,7879);
cs.setDouble(2,0.0);//第二个传什么都无所谓,因为第二个参数是in out模式,是作为输出的
cs.registerOutParameter(2,java.sql.Types.Double,2);//最后那个参数是保留小数点2位
cs.excute();//执行会返回一个boolean结果
//获得结果,获取第二个参数
double result = cs.getDouble(2);
戻り値の結果は、Oracleを設定し、
//存储过程为list(result_set out sys_refcursor, which in number)
CallableStatement cs =conn.prepareCall("{call list(?,?)}");
cs.setInteger(2,1);
cs.registerOutParameter(1,racleTypes.CURSOR);
cs.execute();
//获得结果集
ResultSet rs = (ResultSet)cs.getObject(1);
バッチ操作
一括挿入
人々だけで二つのテーブル、IDと名前、ならびに対応するエンティティクラスの人々の
それは文の実行に失敗した場合に存在するようバッチ操作は、トランザクションに配置する必要があります。
public int[] insetBatch(List<People> list) {
try (Connection connection = JdbcUtil.getConnection();
PreparedStatement ps = connection.prepareStatement("insert into PEOPLE values (?,?)");
) {
// 关闭事务自动提交,手动提交
connection.setAutoCommit(false);
//从list中取出数据
for (People people : list) {
ps.setInt(1, people.getId());
ps.setString(2, people.getName());
//加入到指语句组中
ps.addBatch();
}
int[] recordsEffect = ps.executeBatch();
// 提交事务
connection.commit();
return recordsEffect;
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
一括挿入テスト
public static void main(String[] args) {
List<People> list = new ArrayList<>();
int id = 1;
list.add(new People(id++, "james"));
list.add(new People(id++, "andy"));
list.add(new People(id++, "jack"));
list.add(new People(id++, "john"));
list.add(new People(id++, "scott"));
list.add(new People(id++, "jassica"));
list.add(new People(id++, "jerry"));
list.add(new People(id++, "marry"));
list.add(new People(id++, "alex"));
int[] ints = new BatchTest().insetBatch(list);
System.out.println(Arrays.toString(ints));
}
バッチ更新
public int[] updateBatch(List<People> list) {
try (Connection connection = JdbcUtil.getConnection();
PreparedStatement ps = connection.prepareStatement("undate people set name=? where id=?");
) {
// 关闭事务自动提交,手动提交
connection.setAutoCommit(false);
//从list中取出数据
for (People people : list) {
ps.setInt(1, people.getId());
ps.setString(2, people.getName());
//加入到指语句组中
ps.addBatch();
}
int[] recordsEffect = ps.executeBatch();
// 提交事务
connection.commit();
return recordsEffect;
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
一括削除
public int[] updateBatch(List<People> list) {
try (Connection connection = JdbcUtil.getConnection();
PreparedStatement ps = connection.prepareStatement("delete people where id=?");
) {
// 关闭事务自动提交,手动提交
connection.setAutoCommit(false);
//从list中取出数据
for (People people : list) {
ps.setInt(1, people.getId());
//加入到指语句组中
ps.addBatch();
}
int[] recordsEffect = ps.executeBatch();
// 提交事务
connection.commit();
return recordsEffect;
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}