Question

我在我的实体中将DiscriminatorValue属性设置为transient，其唯一目的是稍后在我的jsp页面中访问，但jsp无法渲染它抛出 java.lang.IllegalStateException：渲染异常视图，我正在使用瓷砖FYI。提前致谢

@Entity
@DiscriminatorValue("YesNo")
public class Child extends Parent{ // parent entity has inheritance strategy
    .....

    DiscriminatorValue type; //want to access this variable in spring form

    @Transient
    public String getDiscriminatorValue(){
        type= this.getClass().getAnnotation( DiscriminatorValue.class );
        return type == null ? null : type.value();
    }
}

//somewhere in jsp i have,
 ${child.type}

Answer 1

对您的班级进行以下更改。

@Transient
String type; //want to access this variable in spring form

public String getDiscriminatorValue(){
     DiscriminatorValue type = this.getClass().getAnnotation( DiscriminatorValue.class );
        return type == null ? null : type.value();
    }

或者您可以将您的鉴别器作为只读属性。

在您的父类中添加define DiscriminatorColumn

@DiscriminatorColumn(name = "Dtype", discriminatorType = DiscriminatorType.STRING)

 @Column(name = "Dtype", insertable = false, updatable = false)
    private String type;

//类型

的getter和setter

java.lang.IllegalStateException：渲染视图发生异常

1 个答案: