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默认方法
修饰符和类型	方法	说明
`default String[]`	`getParameterNames()`	Enumerate all available parameter names if possible.
`default int`	`getSqlType(String paramName)`	Determine the SQL type for the specified named parameter.
`default 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
```
@Nullable
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
```
default 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
```
@Nullable
default 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
  - getParameterNames
```
@Nullable
default String[] getParameterNames()
```
    Enumerate all available parameter names if possible.
    This is an optional operation, primarily for use with SimpleJdbcInsert and SimpleJdbcCall.
    返回:
    the array of parameter names, or null if not determinable
    从以下版本开始:
    5.0.3
    另请参阅:
    SqlParameterSourceUtils.extractCaseInsensitiveParameterNames(org.springframework.jdbc.core.namedparam.SqlParameterSource)

接口 SqlParameterSource

字段概要

方法概要

字段详细资料

TYPE_UNKNOWN

方法详细资料

hasValue

getValue

getSqlType

getTypeName

getParameterNames