持久化TEXT数据类型时出现Hibernate错误 [英] Hibernate Error while persisting TEXT datatype

问题描述

使用hibernate和mysql 5.5，我试图在数据库表的TEXT类型列中保留String值。

Using hibernate and mysql 5.5, I am trying to persist String value in TEXT type column of database table.

厌倦了在所提到的列中设置String值，并尝试保留数据。但是我得到以下异常。我已经使用Netbeans 8.0生成了Entity类。





例如：
例外： -

Tired to set String value in the mentioned column and tried to persist the data.But i am getting following exception. I have generated Entity class using Netbeans 8.0.



Exception:-

FATAL:   JSF1073: javax.faces.FacesException caught during processing of INVOKE_APPLICATION 5 : UIComponent-ClientId=, Message=/addNewCategory.xhtml @30,151 actionListener="#{categoryBean.addCategoryAction}": java.lang.AbstractMethodError: com.mysql.jdbc.ServerPreparedStatement.setCharacterStream(ILjava/io/Reader;J)V
FATAL:   /addNewCategory.xhtml @30,151 actionListener="#{categoryBean.addCategoryAction}": java.lang.AbstractMethodError: com.mysql.jdbc.ServerPreparedStatement.setCharacterStream(ILjava/io/Reader;J)V
javax.faces.FacesException: /addNewCategory.xhtml @30,151 actionListener="#{categoryBean.addCategoryAction}": java.lang.AbstractMethodError: com.mysql.jdbc.ServerPreparedStatement.setCharacterStream(ILjava/io/Reader;J)V
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:89)

CREATE SQL： -

 CREATE TABLE `oc_category_description` (
      `category_id` int(11) NOT NULL,
      `language_id` int(11) NOT NULL,
      `name` varchar(255) NOT NULL,
      `description` text NOT NULL,
      `meta_description` varchar(255) NOT NULL,
      `meta_keyword` varchar(255) NOT NULL,
      PRIMARY KEY (`category_id`,`language_id`),
      KEY `name` (`name`)
    ) ENGINE=MyISAM DEFAULT CHARSET=utf8;

/*!40101 SET character_set_client = @saved_cs_client */;

EntityClass

@Entity
@Table(name = "oc_category_description")
@XmlRootElement
public class OcCategoryDescription implements Serializable {
    private static final long serialVersionUID = 1L;

    @Basic(optional = false)
    @NotNull
    @Lob
    @Size(min = 1, max = 65535)
    @Column(name = "description")
    private String description;

     public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}
    //Constructors, setters, getters, equals and hashcode
}

在提出问题之前，我经历了以下链接，帮助很小。

Before raising question I went through following links which were of very little help.

• JPA：如何将String保留到数据库字段中，键入MYSQL文本


• JPA和PostqreSQL：长字符串持久性


• 使用Hibernate发出持久的长字符串

• JPA: how do I persist a String into a database field, type MYSQL Text
• JPA and PostqreSQL: long string persistence
• Issue persisting long strings with Hibernate

• 我还尝试通过删除 @Lob 来保存数据，将数据保存为org.hibernate.engine.jdbc。 BlobProxy @ 11e84b60


• 我试过使用@Column（columnDefinition = TEXT）而不是 @Lob ，再次给出相同的结果。 org.hibernate.engine.jdbc.BlobProxy@11e84b60


• 我试过 @Type（type =text）而不是 @Lob ，再次给出相同的结果。 org.hibernate.engine.jdbc.BlobProxy@11e84b60

• I also tried to persist data by removing @Lob, it saving data as "org.hibernate.engine.jdbc.BlobProxy@11e84b60"
• I tried using @Column(columnDefinition = "TEXT") instead of @Lob, again its giving same result. "org.hibernate.engine.jdbc.BlobProxy@11e84b60"
• I tried @Type(type="text")instead of @Lob, again its giving same result. "org.hibernate.engine.jdbc.BlobProxy@11e84b60"

推荐答案

删除@Lob和@Size注释，并使用@Type（type =text）
替代

remove the @Lob and @Size annotations, and use @Type(type="text") instead

的工作。感谢@Maurice和@Funtik

WORKED. Thanks @Maurice and @Funtik

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