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BeanPropertyRowMapper (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.jdbc.core
Class BeanPropertyRowMapper

java.lang.Object
  org.springframework.jdbc.core.BeanPropertyRowMapper

All Implemented Interfaces:

RowMapper

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public class BeanPropertyRowMapper
extends Object
implements RowMapper

Generic RowMapper implementation that converts a row into a new instance of the specified mapped target class. The mapped target class must be a top-level class and it must have a default or no-arg constructor. Column values are mapped based on matching the column name as obtained from result set metadata to public setters for the corresponding properties. The names are matched either directly or by transforming a name separating the parts with underscores to the same name using "camel" case. Mapping is provided for fields in the target class that are defined as any of the following types: String, byte, Byte, short, Short, int, Integer, long, Long, float, Float, double, Double, BigDecimal, boolean, Boolean and java.util.Date. To facilitate mapping between columns and fields that don't have matching names, try using column aliases in the SQL statement like "select fname as first_name from customer". Please note that this class is designed to provide convenience rather than high performance. For best performance consider using a custom RowMapper.

Since:

2.1

Author:

Thomas Risberg

See Also:

RowMapper

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Constructor Summary
BeanPropertyRowMapper()           Create a new BeanPropertyRowMapper.
BeanPropertyRowMapper(Class mappedClass)           Create a new BeanPropertyRowMapper.

 

Method Summary
Object	mapRow(ResultSet rs, int rowNumber)           Extract the values for all columns in the current row.
void	setMappedClass(Class mappedClass)           Set the class that each row should be mapped to.
static String	underscoreName(String name)           Convert a name in camelCase to an underscored name in lower case.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

BeanPropertyRowMapper

public BeanPropertyRowMapper()

Create a new BeanPropertyRowMapper.

See Also:

setMappedClass(java.lang.Class)

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BeanPropertyRowMapper

public BeanPropertyRowMapper(Class mappedClass)

Create a new BeanPropertyRowMapper.

Parameters:

mappedClass - the class that each row should be mapped to.

Method Detail

setMappedClass

public void setMappedClass(Class mappedClass)

Set the class that each row should be mapped to.

Parameters:

mappedClass - the class that each row should be mapped to.

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mapRow

public Object mapRow(ResultSet rs,
                     int rowNumber)
              throws SQLException

Extract the values for all columns in the current row.

Utilizes public setters and result set metadata.

Specified by:

mapRow in interface RowMapper

Parameters:

rs - the ResultSet to map (pre-initialized for the current row)

rowNumber - the number of the current row

Returns:

the result object for the current row

Throws:

SQLException - if a SQLException is encountered getting column values (that is, there's no need to catch SQLException)

See Also:

ResultSetMetaData

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underscoreName

public static String underscoreName(String name)

Convert a name in camelCase to an underscored name in lower case. Any upper case letters are converted to lower case with a preceding underscore.

Parameters:

name - The string containing original name

Returns:

The name converted

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