service和serviceImpl抽取

BaseService.java

package cn.buaa.scm.service;

import cn.buaa.scm.entity.Page;

public interface BaseService {

	// 插入数据
	public int insert(T entity) throws Exception;

	// 修改单个对象
	public int update(T entity) throws Exception;

	// 删除单个对象
	public int delete(T entity) throws Exception;

	// 通过主键（数组）批量删除数据
	public int deleteList(String[] pks) throws Exception;

	// 查询单个对象
	public T select(T entity) throws Exception;

	// 通过关键字分页查询
	public Page selectPage(Page page);

	// 多条件分页查询
	public Page selectPageUseDyc(Page page);

}

BaseServiceimpl

package cn.buaa.scm.service.impl;

import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;

import javax.annotation.PostConstruct;

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

import cn.buaa.scm.dao.AccountMapper;
import cn.buaa.scm.dao.BaseMapper;
import cn.buaa.scm.dao.SupplierMapper;
import cn.buaa.scm.entity.Page;
import cn.buaa.scm.service.BaseService;

public class BaseServiceImpl implements BaseService {

	protected BaseMapper baseMapper;

	@Autowired
	protected SupplierMapper supplierMapper;

	@Autowired
	protected AccountMapper accountMapper;

	@PostConstruct
	// 在构造方法后，初化前执行
	private void initBaseMapper() throws Exception {
		// 完成以下逻辑，需要对研发本身进行命名与使用规范
		// this关键字指对象本身，这里指的是调用此方法的实现类（子类）
		System.out.println("=======this :" + this);
		System.out.println("=======父类基本信息：" + this.getClass().getSuperclass());
		System.out.println("=======父类和泛型的信息：" + this.getClass().getGenericSuperclass());

		ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
		// 获取第一个参数的class
		Class clazz = (Class) type.getActualTypeArguments()[0];
		System.out.println("=======class:" + clazz);
		// 转化为属性名（相关的Mapper子类的引用名）Supplier supplierMapper
		String localField = clazz.getSimpleName().substring(0, 1).toLowerCase() + clazz.getSimpleName().substring(1)
				+ "Mapper";
		System.out.println("=======localField:" + localField);
		// getDeclaredField:可以使用于包括私有、默认、受保护、公共字段，但不包括继承的字段
		Field field = this.getClass().getSuperclass().getDeclaredField(localField);
		System.out.println("=======field:" + field);
		System.out.println("=======field对应的对象:" + field.get(this));
		Field baseField = this.getClass().getSuperclass().getDeclaredField("baseMapper");

		System.out.println("=======baseField:" + baseField);
		System.out.println("=======baseField对应的对象:" + baseField.get(this));
		// field.get(this)获取当前this的field字段的值。例如：Supplier对象中，baseMapper所指向的对象为其子类型SupplierMapper对象，子类型对象已被spring实例化于容器中
		baseField.set(this, field.get(this));
		System.out.println("========baseField对应的对象:" + baseMapper);

	}

	@Override
	public int insert(T entity) throws Exception {
		// TODO Auto-generated method stub
		return baseMapper.insert(entity);
	}

	@Override
	public int update(T entity) throws Exception {
		// TODO Auto-generated method stub
		return baseMapper.update(entity);
	}

	@Override
	public int delete(T entity) throws Exception {
		// TODO Auto-generated method stub
		return baseMapper.delete(entity);
	}

	@Override
	public int deleteList(String[] pks) throws Exception {
		// TODO Auto-generated method stub
		return baseMapper.deleteList(pks);
	}

	@Override
	public T select(T entity) {
		// TODO Auto-generated method stub
		return baseMapper.select(entity);
	}

	@Override
	public Page selectPage(Page page) {
		page.setList(baseMapper.selectPageList(page));
		page.setTotalRecord(baseMapper.selectPageCount(page));
		return page;
	}

	@Override
	public Page selectPageUseDyc(Page page) {
		// TODO Auto-generated method stub
		page.setList(baseMapper.selectPageListUseDyc(page));
		page.setTotalRecord(baseMapper.selectPageCountUseDyc(page));
		return page;
	}
}