public String getPerference() {
  return perference;
 }

 public void setPerference(String perference) {
  this.perference = perference;
 }

 public String getType() {
  return type;
 }

 public void setType(String type) {
  this.type = type;
 }

 public String getDescription() {
  return Description;
 }

 public void setDescription(String description) {
  Description = description;
 }

 @Override
 public String toString() {
  return "Customer [id=" + id + ", name=" + name + ", gender=" + gender
    + ", birthday=" + birthday + ", cellphone=" + cellphone
    + ", Email=" + Email + ", perference=" + perference + ", type="
    + type + ", Description=" + Description + "]";
 }
 
 
}

dao层：

Dao接口：

package cn.csdn.customer.dao;

import java.util.List;

public interface Dao<T,PK> {
 
 /*插入实体*/
 boolean insert(T entity);
 
 /*更新实体*/
 boolean update(T entity);
 
 /*删除实体*/
 boolean delete(T entity);
 
 /*查询所有实体*/