spring Jdbc自己主动获取主键。

学习了下springjdbc，感觉挺有用的，相对来说springjdbc 扩展性相当好了

package com.power.dao;

import java.lang.reflect.ParameterizedType;

import java.lang.reflect.Type;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.jdbc.core.PreparedStatementCreator;

import org.springframework.jdbc.support.GeneratedKeyHolder;

import org.springframework.jdbc.support.KeyHolder;

import com.power.sql.UpdateSql;

import com.power.sql.UpdateSql.SqlType;

import com.power.utils.ArrayAssistant;

import com.power.utils.FieldAssistant;

import com.power.utils.TransformUtils;

@SuppressWarnings("unchecked")

public class BaseDao<T>{

	private Class<T> entityClass ; 

	public BaseDao() {

		this.entityClass = null;

		Class<?

> c = getClass();

		Type type = c.getGenericSuperclass();

		if (type instanceof ParameterizedType) {

			Type[] parameterizedType = ((ParameterizedType) type)

					.getActualTypeArguments();

			this.entityClass = (Class<T>) parameterizedType[0];

		}

	}

	@Autowired

	private JdbcTemplate jdbcTemplate ;  

	private UpdateSql updateSql ; 

	public Integer insert(T t){

		updateSql = new UpdateSql(SqlType.INSERT , t) ;  

		if(null == updateSql.getIdName()){

			return jdbcTemplate.update( updateSql.getSqlBuffer() , ArrayAssistant.asArray(updateSql.getParam()) ) ;

		}

		KeyHolder holder = new GeneratedKeyHolder() ;

		jdbcTemplate.update(new PreparedStatementCreator() {

			public PreparedStatement createPreparedStatement(Connection conn)

					throws SQLException {

				PreparedStatement ps = conn.prepareStatement( updateSql.getSqlBuffer() ,

						new String[] { updateSql.getIdName() } ) ;

				List<Object> param = updateSql.getParam() ;

				int size = param.size() ;

				for(int x=1;x<=size;x++){

					ps.setObject(x, param.get(x-1));

				}

				return ps ;

			}

		} , holder ) ; 

		int id = TransformUtils.toInt(holder.getKey()) ;

		FieldAssistant.writeField(updateSql.getIdName(),  t , id, true); 

		return TransformUtils.toInt(holder.getKey()) ;

	}

	public int update(T t){

		updateSql = new UpdateSql(SqlType.UPDATE , t) ;

		int result = jdbcTemplate.update(updateSql.getSqlBuffer()

				, ArrayAssistant.asArray(updateSql.getParam())) ;

		return result ;

	}

	public int delete(T t){

		updateSql = new UpdateSql(SqlType.DELETE , t) ;

		int result = jdbcTemplate.update(updateSql.getSqlBuffer()

				, ArrayAssistant.asArray(updateSql.getParam())) ;

		return result ;

	}

	public int delete(Integer id){

		updateSql = new UpdateSql( entityClass ) ;  

		int result = jdbcTemplate.update(updateSql.getSqlBuffer()

				, id ) ;

		return result ;

	}

}

UpdateSql 类在：http://blog.csdn.net/hfmbook/article/details/41290641

转载请表名出处：http://blog.csdn.net/hfmbook