Mybatis处理oracle数据库number类型精度丢失问题

配置Mybatis处理oracle数据库number类型类
1.自定义一个TypeHander继承原来的TypeHandler

@MappedJdbcTypes(JdbcType.NUMERIC)
public class MyBigDecimalTypeHandler extends BigDecimalTypeHandler {

    @Override
    public BigDecimal getNullableResult(ResultSet rs, String columnName) throws SQLException {
        BigDecimal result =super.getNullableResult(rs, columnName)==null?BigDecimal.ZERO.setScale(2, BigDecimal.ROUND_HALF_UP):super.getNullableResult(rs, columnName).setScale(2, BigDecimal.ROUND_HALF_UP);
        return  result;
    }

    @Override
    public BigDecimal getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
     BigDecimal result =super.getNullableResult(rs, columnIndex)==null?BigDecimal.ZERO.setScale(2, BigDecimal.ROUND_HALF_UP):super.getNullableResult(rs, columnIndex).setScale(2, BigDecimal.ROUND_HALF_UP);
        return  result;
    }

    @Override
    public BigDecimal getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
         BigDecimal result = super.getNullableResult(cs, columnIndex)==null?BigDecimal.ZERO.setScale(2, BigDecimal.ROUND_HALF_UP):super.getNullableResult(cs, columnIndex).setScale(2, BigDecimal.ROUND_HALF_UP);
        return  result;
    }
}

2.注册
在mybatis config.xml文件配置

这里具体可以查看https://blog.csdn.net/qq_36761831/article/details/88375481