SqlParameterSource (Spring Framework 4.3.30.RELEASE API)

所有已知实现类:
AbstractSqlParameterSource, BeanPropertySqlParameterSource, EmptySqlParameterSource, MapSqlParameterSource
```
public interface SqlParameterSource
```
Interface that defines common functionality for objects that can offer parameter values for named SQL parameters, serving as argument for NamedParameterJdbcTemplate operations.
This interface allows for the specification of SQL type in addition to parameter values. All parameter values and types are identified by specifying the name of the parameter.
Intended to wrap various implementations like a Map or a JavaBean with a consistent interface.
从以下版本开始:
2.0
作者:
Thomas Risberg, Juergen Hoeller
另请参阅:
NamedParameterJdbcOperations, NamedParameterJdbcTemplate, MapSqlParameterSource, BeanPropertySqlParameterSource

字段概要
字段
修饰符和类型字段说明
static int TYPE_UNKNOWN
Constant that indicates an unknown (or unspecified) SQL type.

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`int`	`getSqlType(String paramName)`	Determine the SQL type for the specified named parameter.
`String`	`getTypeName(String paramName)`	Determine the type name for the specified named parameter.
`Object`	`getValue(String paramName)`	Return the parameter value for the requested named parameter.
`boolean`	`hasValue(String paramName)`	Determine whether there is a value for the specified named parameter.

- 字段详细资料
  - TYPE_UNKNOWN
```
static final int TYPE_UNKNOWN
```
    Constant that indicates an unknown (or unspecified) SQL type. To be returned from getType when no specific SQL type known.
    另请参阅:
    getSqlType(java.lang.String), Types, 常量字段值
- 方法详细资料
  - hasValue
```
boolean hasValue(String paramName)
```
    Determine whether there is a value for the specified named parameter.
    参数:
    paramName - the name of the parameter
    返回:
    whether there is a value defined
  - getValue
```
Object getValue(String paramName)
         throws IllegalArgumentException
```
    Return the parameter value for the requested named parameter.
    参数:
    paramName - the name of the parameter
    返回:
    the value of the specified parameter
    抛出:
    IllegalArgumentException - if there is no value for the requested parameter
  - getSqlType
```
int getSqlType(String paramName)
```
    Determine the SQL type for the specified named parameter.
    参数:
    paramName - the name of the parameter
    返回:
    the SQL type of the specified parameter, or TYPE_UNKNOWN if not known
    另请参阅:
    TYPE_UNKNOWN
  - getTypeName
```
String getTypeName(String paramName)
```
    Determine the type name for the specified named parameter.
    参数:
    paramName - the name of the parameter
    返回:
    the type name of the specified parameter, or null if not known