在 Java class 中打印具有特定注释的字段

Question

在我的模型中有不同的持久字段，它们具有不同的注释，例如 @Column、@OneToMany 等。

@OneToMany(mappedBy = "Clinte", cascade = CascadeType.ALL, orphanRemoval = true)
private Set<Takeover> takeovers = new HashSet<Takeover>();

@OneToOne(cascade = CascadeType.ALL, orphanRemoval = true)
@JoinColumn(name = "CAR_ID")
private Car carID;

@Column(length = 50, name = "TYPE")
private String type;

如何打印具有注释 @Column 且类型为 String 的持久字段？？例如在我的代码中，我只想打印 "type" 因为它有注释 @Column 并且类型为 String.

Answer 1

我已经找到方法了：

        Field[] fields=myClass.class.getDeclaredFields();
      for (int i=0; i != fields.length; ++i) {
        Field field=fields[i];
        Column info=field.getAnnotation(Column.class);
        if (info == null || field.getType() != String.class){
               continue;
              }
        System.out.println("Field Name : "+  field.getName() + "  Field type: " +field.getType().getSimpleName());
      }

在 Java class 中打印具有特定注释的字段

print the fileds which has a specific annotation in a Java class

java

jpa-2.0