我們可以在休眠中的兩個表之間有@OneToMany和@ManyToOne關係嗎？例如：

Question

例如。

public class Portfolio implements Serializable { 

    @ManyToOne() 
    @JoinColumn(name = "PORTFOLIO_OWNER", referencedColumnName = "USER_ID", foreignKey = @ForeignKey(name = "FK__USER__PORTFOLIO"), nullable = false) 
    private User portfolioOwner; 

    @ManyToOne() 
    @JoinColumn(name = "ACCOUNT_CAPTAIN", referencedColumnName = "USER_ID", foreignKey = @ForeignKey(name = "FK__USER__PORTFOLIO2")) 
    private User accountCaptain; 

} 

和

public class User { 

    @ManyToOne 
    @JoinColumn(name = "PORTFOLIO_ID", referencedColumnName = "PORTFOLIO_ID", foreignKey = @ForeignKey(name = "FK_DEF_PORTFOLIO_USER")) 
    @Fetch(FetchMode.JOIN) 
    private Portfolio defaultPortfolio; 

} 

我使用傑克遜作爲一個JSON獲取他們碰上＃1

org.springframework.http.converter.HttpMessageNotWritableException： 無法寫入內容：無限遞歸（StackOverflowError） （通過參考鏈： com.User [「defaultPortfolio」] - > com..Portfolio [「portfolioOwner」] - > com.Us呃[ 「defaultPortfolio」] - > com.Portfolio [ 「portfolioOwner」] - > com..User [ 「defaultPortfolio」] -

Answer 1

你需要添加JSON忽視的關係前的一面：

public class Portfolio implements Serializable { 

    @ManyToOne() 
    @JoinColumn(name = "PORTFOLIO_OWNER", referencedColumnName = "USER_ID", foreignKey = @ForeignKey(name = "FK__USER__PORTFOLIO"), nullable = false) 
    @JsonIgnore 
    private User portfolioOwner; 

    @ManyToOne() 
    @JoinColumn(name = "ACCOUNT_CAPTAIN", referencedColumnName = "USER_ID", foreignKey = @ForeignKey(name = "FK__USER__PORTFOLIO2")) 
    private User accountCaptain; 

}