无限递归杰克逊JSON，Spring MVC 4.2和Hibernate JPA问题 [英] Infinite Recursion with Jackson JSON, Spring MVC 4.2 and Hibernate JPA issue

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问题描述

当Spring MVC尝试通过jackson 2.6.1将具有双向关联的JPA对象转换为JSON时，我不断收到

  org.springframework.http.converter.HttpMessageNotWritableException：无法写入内容：无限递归（StackOverflowError）

第一个实体是：

  import com.fasterxml.jackson.annotation.JsonManagedReference; 
 import javax.persistence.Entity; 
 import javax.persistence.Table; 
 ... 
 
 @Entity 
 @Table（name =user）
 public class用户实现java.io.Serializable {
 private Integer用户名; 
 @JsonManagedReference 
 private UserClass userClass; 
 
 @Id 
 @GeneratedValue（strategy = IDENTITY）
 @Column（name =userId，unique = true，nullable = false）
 public Integer getUserId ）{
返回this.userId; 
 
 
 @ManyToOne（）
 @JoinColumn（name =userClassId）
 
 public UserClass getUserClass（）{
 return this .userClass; 
} 
 ....... 
}

第二个是：

  import com.fasterxml.jackson.annotation.JsonManagedReference; 
 import javax.persistence.Entity; 
 import javax.persistence.Table; 
 ... 
 
 @Entity 
 @Table（name =user_class）
 public class UserClass implements java.io.Serializable {
 
 private Integer userClassId; 
 @JsonBackReference 
私人列表< User> users = new ArrayList< User>（0）; 
 
 @Id 
 @GeneratedValue（strategy = IDENTITY）
 @Column（name =userClassId，unique = true，nullable = false）
 public Integer getUserClassId ）{
返回this.userClassId; 
} 
 
 
 @OneToMany（fetch = FetchType.LAZY，mappedBy =userClass）
 public List< User> getUsers（）{
返回this.users; 
}

这里是依赖项： 

 <依赖关系> 
 
< dependency> 
< groupId> junit< / groupId> 
< artifactId> junit< / artifactId> 
< version> 3.8.1< / version> 
< scope> test< / scope> 
< /依赖关系> 
 
< dependency> 
< groupId> org.springframework< / groupId> 
< artifactId> spring-webmvc< / artifactId> 
< version> 4.2.0.RELEASE< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.springframework< / groupId> 
< artifactId> spring-orm< / artifactId> 
< version> 4.2.0.RELEASE< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.springframework< / groupId> 
< artifactId> spring-oxm< / artifactId> 
< version> 4.2.0.RELEASE< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.springframework.data< / groupId> 
< artifactId> spring-data-jpa< / artifactId> 
< version> 1.8.2.RELEASE< / version> 
<排除项> 
<排除> 
< groupId> org.springframework< / groupId> 
< artifactId> spring-aop< / artifactId> 
< /排除> 
< /排除> 
< /依赖关系> 
 
 
< dependency> 
< groupId> javax.servlet< / groupId> 
< artifactId> servlet-api< / artifactId> 
< scope>提供< / scope> 
< version> 2.5< / version> 
< /依赖关系> 
< dependency> 
< groupId> javax.servlet< / groupId> 
< artifactId> jstl< / artifactId> 
< version> 1.2< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> cglib< / groupId> 
< artifactId> cglib< / artifactId> 
< version> 3.1< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> log4j< / groupId> 
< artifactId> log4j< / artifactId> 
< version> 1.2.17< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> com.thoughtworks.xstream< / groupId> 
< artifactId> xstream< / artifactId> 
< version> 1.4.8< / version> 
< /依赖关系> 
< dependency> 
< groupId> com.fasterxml.jackson.core< / groupId> 
< artifactId> jackson-core< / artifactId> 
< version> 2.6.1< / version> 
< /依赖关系> 
< dependency> 
< groupId> com.fasterxml.jackson.core< / groupId> 
< artifactId> jackson-databind< / artifactId> 
< version> 2.6.1< / version> 
< /依赖关系> 
< dependency> 
< groupId> com.fasterxml.jackson.datatype< / groupId> 
< artifactId> jackson-datatype-hibernate4< / artifactId> 
< version> 2.6.1< / version> 
< /依赖关系> 
 
 
 
< dependency> 
< groupId> mysql< / groupId> 
< artifactId> mysql-connector-java< / artifactId> 
< version> 5.1.34< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> org.hibernate< / groupId> 
< artifactId> hibernate-core< / artifactId> 
< version> 4.3.10.Final< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.hibernate< / groupId> 
< artifactId> hibernate-entitymanager< / artifactId> 
< version> 4.3.10.Final< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.hibernate< / groupId> 
< artifactId> hibernate-validator< / artifactId> 
< version> 5.1.3.Final< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> org.apache.tiles< / groupId> 
< artifactId> tiles-core< / artifactId> 
< version> 3.0.5< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.apache.tiles< / groupId> 
< artifactId> tiles-jsp< / artifactId> 
< version> 3.0.5< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.apache.tiles< / groupId> 
< artifactId> tiles-api< / artifactId> 
< version> 3.0.5< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.apache.tiles< / groupId> 
< artifactId> tiles-template< / artifactId> 
< version> 3.0.5< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> org.slf4j< / groupId> 
< artifactId> jcl-over-slf4j< / artifactId> 
< version> 1.7.12< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.slf4j< / groupId> 
< artifactId> slf4j-api< / artifactId> 
< version> 1.7.12< / version> 
< /依赖关系> 
< dependency> 
< groupId> org.slf4j< / groupId> 
< artifactId> slf4j-simple< / artifactId> 
< version> 1.7.12< / version> 
< /依赖关系> 
 
< dependency> 
< groupId> com.google.guava< / groupId> 
< artifactId>番石榴< / artifactId> 
< version> 18.0< / version> 
< /依赖关系> 
 
 
< / dependencies>

为防止递归，我使用了@JsonIgnore，@JsonIdentityInfo和XmlTransient他们不工作，服务器报告这个错误。有人可以帮我吗？

谢谢。

编辑：
和堆栈轨迹：

  org.springframework.http.converter.HttpMessageNotWritableException：无法写入内容：无限递归（StackOverflowError）（通过引用链：
 sss.com.model.UserClass [ 用户]  - > org.hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [ UserClass的]  - > sss.com.model .UserClass [users]  - > 
 org.hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [userClass]  - > sss.com.model。 UserClass的[ 用户]  - > org.hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [ UserClass的]  - > sss.com.model.UserClass [ 用户 ] ...。
嵌套的异常是com.fasterxml.jackson.databind.JsonMappingException：无限递归（StackOverflowError）（通过引用链：
 sss.com.model.UserClass [users]  - > ; org.hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [ UserClass的]  - > sss.com.m odel.UserClass [ 用户]  - > 
 org.hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [userClass]  - > sss.com.model.UserClass [users]  - > org .hibernate.collection.internal.PersistentBag [0]  - > sss.com.model.User [userClass]  - > sss.com.model.UserClass [users] ...。与根源
 java.lang.StackOverflowError的$ B $ LT b。在产生java.io.IOException&;初始化>（IOException.java:58）
。在com.fasterxml.jackson.core.JsonProcessingException< ; init>（JsonProcessingException.java:25）
 at com.fasterxml.jackson.core.JsonProcessingException。< init>（JsonProcessingException.java:41）
 at com.fasterxml.jackson.databind.JsonMappingException 。< init>（JsonMappingException.java:143）
 at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields（BeanSerializerBase.java:689）
 at com.fasterxml.jackson。在com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents databind.ser.BeanSerializer.serialize（BeanSerializer.java:157）
（CollectionSerializer.java:149）
。在com.fasterxml。 jackson.databind.ser.std.CollectionSerializer.serialize（CollectionSerializer.java:111）
在com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize（CollectionSerializer.java:24） 
 at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField（BeanPropertyWriter.java:656）
 at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields（BeanSerializerBase.java： 675）
 at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize（BeanSerializer.java:157）
 at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField（BeanPropertyWriter.java： 
 at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields（BeanSerializerBase.java:675）
 at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize（BeanSerializer。 Java的：在com.fasterxml.jackson.databind.ser.std.CollectionSerializer在com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents 157）
（CollectionSerializer.java:149）
。 serialize（CollectionSerializer.java:111）
 at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize（CollectionSerializer.java:24）
在com.fasterxml.jackson.databind.ser.BeanSerializerBase.serializeFields（BeanSerializerBase.java:675）
 
 
 
 
 
 
 
解决方案：
在我的原始实体中，我有5个双向关系，但是只是，我被注释了一个关系。原因是tomcat在结果页面没有打印异常，我也没有检查tomcat的日志文件。

code> @JsonIgnore 

  @JsonIgnore 
 @OneToMany（fetch = FetchType .LAZY，mappedBy =userClass）
 public List< User> getUsers（）{
返回this.users; 
}

这会忽略延迟加载对象并修复您的问题。



更新




When Spring MVC try to convert a JPA object that has a bi-directional association into JSON by jackson 2.6.1 , I keep getting

org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: Infinite recursion (StackOverflowError)

and first entity is:

import com.fasterxml.jackson.annotation.JsonManagedReference;
import javax.persistence.Entity;
import javax.persistence.Table;
...

@Entity
@Table(name = "user")
public class User implements java.io.Serializable {
    private Integer userId;
    @JsonManagedReference
    private UserClass userClass;

@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "userId", unique = true, nullable = false)
public Integer getUserId() {
    return this.userId;
}

@ManyToOne()
@JoinColumn(name = "userClassId")

public UserClass getUserClass() {
    return this.userClass;
}
.......
}

the second is:

 import com.fasterxml.jackson.annotation.JsonManagedReference;
 import javax.persistence.Entity;
 import javax.persistence.Table;
 ...

@Entity
@Table(name = "user_class")
public class UserClass implements java.io.Serializable {

private Integer userClassId;
@JsonBackReference
private List<User> users = new ArrayList<User>(0);

@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "userClassId", unique = true, nullable = false)
public Integer getUserClassId() {
    return this.userClassId;
}


@OneToMany(fetch = FetchType.LAZY, mappedBy = "userClass")
public List<User> getUsers() {
     return this.users;
}

and here is dependencies:

<dependencies>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>1.8.2.RELEASE</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-aop</artifactId>
                </exclusion>
            </exclusions>
        </dependency>


        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <scope>provided</scope>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>3.1</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <dependency>
            <groupId>com.thoughtworks.xstream</groupId>
            <artifactId>xstream</artifactId>
            <version>1.4.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.6.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.6.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-hibernate4</artifactId>
            <version>2.6.1</version>
        </dependency>



        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.34</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.10.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.3.10.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.1.3.Final</version>
        </dependency>

        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-core</artifactId>
            <version>3.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-jsp</artifactId>
            <version>3.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-api</artifactId>
            <version>3.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-template</artifactId>
            <version>3.0.5</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.7.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.7.12</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>18.0</version>
        </dependency>


    </dependencies>

I used "@JsonIgnore", "@JsonIdentityInfo" and "XmlTransient" for prevent recursion but both of them not working and the server report this error. Can someone help me?

Thanks.

Edit: And Stack trace:

org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: Infinite recursion (StackOverflowError) (through reference chain:
sss.com.model.UserClass["users"]->org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]->
org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]->org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]... .
 nested exception is com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: 
sss.com.model.UserClass["users"]->org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]->
org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]->org.hibernate.collection.internal.PersistentBag[0]->sss.com.model.User["userClass"]->sss.com.model.UserClass["users"]... . with root cause
 java.lang.StackOverflowError
    at java.io.IOException.<init>(IOException.java:58)
    at com.fasterxml.jackson.core.JsonProcessingException.<init>(JsonProcessingException.java:25)
    at com.fasterxml.jackson.core.JsonProcessingException.<init>(JsonProcessingException.java:41)
    at com.fasterxml.jackson.databind.JsonMappingException.<init>(JsonMappingException.java:143)
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:157)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:149)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:111)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24)
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:656)
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:675)
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:157)
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:656)
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:675)
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:157)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:149)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:111)
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24)
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:656)
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:675)
...

SOLVED: In my original entity I have 5 bidirectional relation but, just, I was annotated one relation. The reason is tomcat didn't print exception in result page and i don't check tomcat log file.

解决方案

Just put @JsonIgnore

@JsonIgnore
@OneToMany(fetch = FetchType.LAZY, mappedBy = "userClass")
public List<User> getUsers() {
     return this.users;
}

This will ignore lazy load object and fix your issue.

Update

  • According to Udara Seneviratne answer, You can handle bi-directional relationship by @JsonManagedReference, @JsonBackReference.

这篇关于无限递归杰克逊JSON，Spring MVC 4.2和Hibernate JPA问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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