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数据库中有外键时JavaBean的编辑法

2024-09-07 22:12:49
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  当写表和实体类之间映射的时候,一旦出现外键,要通过外键找到另外一个类,一旦出现外键必须写成类型
  private Address address;
  person表
 
  public class Person {
      private String pid;
      private String pname;
      private int age;
 
      private Address address;
 
      public Address getAddress() {
          return address;
      }
      public void setAddress(Address address) {
          this.address = address;
      }
      public String getPid() {
          return pid;
      }
      public void setPid(String pid) {
          this.pid = pid;
      }
      public String getPname() {
          return pname;
      }
      public void setPname(String pname) {
          this.pname = pname;
      }
      public int getAge() {
          return age;
      }
      public void setAge(int age) {
          this.age = age;
      }
      //覆盖原来的toString方法
      @Override
      public String toString() {
          return "Person [pid=" + pid + ",pname=" + pname + ",age=" + age +"]";
      }
  }
  数据库中有外键时JavaBean的写法
 
  public class Address {
      private String aid; //主键
      private String province; //省
      private String city; //市
      private String district; //区
      private String street; //街道
 
      public String getAid() {
          return aid;
      }
      public void setAid(String aid) {
          this.aid = aid;
      }
      public String getProvince() {
          return province;
      }
      public void setProvince(String province) {
          this.province = province;
      }
      public String getCity() {
          return city;
      }
      public void setCity(String city) {
          this.city = city;
      }
      public String getDistrict() {
          return district;
      }
      public void setDistrict(String district) {
          this.district = district;
      }
      public String getStreet() {
          return street;
      }
      public void setStreet(String street) {
          this.street = street;
      }
  }

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