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  • oracle学习笔记(二十三)——JDBC调用存储过程以及批量操作

    jdbc调用存储过程

    使用并获得out模式的参数返回值

    //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);
    

    获得oracle返回的结果集

    //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);
    
    

    批量操作

    批量插入

    People表中只有两列,id和name ,还有对应的一个实体类People
    批量操作应该放到事务里进行,因为它会存在某条语句执行失败的情况。

    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;
    }
    

    批量插入测试

    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));
    }
    

    批量更新

    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;
    }
    

    批量删除

    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;
    }
    
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  • 原文地址:https://www.cnblogs.com/stars-one/p/10990879.html
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