Java 使用Hibernate将嵌套JSON数据保存到MySQL数据库_Java_Mysql_Json_Spring_Hibernate

Java 使用Hibernate将嵌套JSON数据保存到MySQL数据库

java mysql json spring hibernate

Java 使用Hibernate将嵌套JSON数据保存到MySQL数据库,java,mysql,json,spring,hibernate,Java,Mysql,Json,Spring,Hibernate,我被这个问题搞得焦头烂额。我已经为嵌套的JSON创建了一个POJO，我正在MarketPrice对象中获取数据，其中marketPrices是一个ArrayList，它有两个元素这是MarketPrice POJO类，实际上我需要将其保存到MarketPrice表中。即，整个JSON对象。但我有两个实体。这怎么可能呢 MarketPrice.java @Entity @Table(name = "MarketPrice") public class MarketPrice { @Id @G

我被这个问题搞得焦头烂额。我已经为嵌套的JSON创建了一个POJO，我正在

MarketPrice

对象中获取数据，其中

marketPrices

是一个

ArrayList

，它有两个元素

这是MarketPrice POJO类，实际上我需要将其保存到

MarketPrice

表中。即，整个JSON对象。但我有两个实体。这怎么可能呢

MarketPrice.java

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;


public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    @Column(name = "itemName")
    private String itemName;

    @Column(name = "unitofPrice")
    private String unitofPrice;

    @Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
    private Float minimumPrice;

    @Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
    private Float maximumPrice;

@RequestMapping(value = {"/saveAnalysis"} , method = RequestMethod.POST,consumes = "application/json")
@ResponseBody
public MarketPrice bulkSaveMarketAnalysis(@RequestBody 
        String marketPrices, HttpServletResponse response,
        HttpServletRequest request) throws JsonProcessingException, IOException, JSONException{

    MarketPrice marketPrice1 = new MarketPrice();
    System.out.println("Json Data"+marketPrices);//here am getting valid nested json from UI
    Gson gson = new Gson();
    MarketPrice marketPrice = gson.fromJson(marketPrices, MarketPrice.class);//converting it into Entity type all values are present in it.
    //Am strucked after this,How to save nested json into DB.

    String marketDataResponse =  analyserService.saveListOfMarketPrice(marketPrice);
    marketPrice1.setStatusMessage("success");
    return marketPrice1;
}

public String saveListOfMarketPrice(MarketPrice marketPrice) {
    System.out.println("In Analyser DAO fro bulk saving");
    final Session session = getSession();
    session.beginTransaction();
    marketPrice.setAnalysisDate(new Date());
    for (Items item : marketPrice.marketPrices) {
       marketPrice.currentItem = item;
       marketPrice.setItemName(marketPrice.currentItem.getItemName());
       marketPrice.setUnitofPrice(marketPrice.currentItem.getUnitofPrice());
       marketPrice.setMinimumPrice(marketPrice.currentItem.getMinimumPrice());
       marketPrice.setMaximumPrice(marketPrice.currentItem.getMaximumPrice());
        session.save(marketPrice);
    }
    session.getTransaction().commit();
    session.close();
    return "success";
}

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;

 @Transient
 public Items currentItem;

@Column(name = "itemName")
public String getItemName() {
    return this.currentItem.itemName;
}

@Column(name = "unitofPrice")
public String getUnitofPrice() {
    return this.currentItem.unitofPrice;
}

@Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
public Float getMinimumPrice() {
    return this.currentItem.minimumPrice;
}

@Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
public Float getMaximumPrice() {
    return this.currentItem.maximumPrice;
}

@Transient
public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    public String itemName;

    public String unitofPrice;

    public Float minimumPrice;

    public Float maximumPrice;

public String saveListOfMarketPrice(MarketPrice marketPrice) {
        System.out.println("In Analyser DAO fro bulk saving");
        final Session session = getSession();
        session.beginTransaction();
        for (Items item : marketPrice.marketPrices) {
           marketPrice.currentItem = item;
           session.save(marketPrice);
        }
        session.getTransaction().commit();
        session.close();
        return "success";
    }

这是我从控制器服务器端获取的嵌套JSON数据：

市场价格中的JSON数据

{
    "marketPrices": [{
        "itemName": "Mango",
        "unitofPrice": "Kg",
        "minimumPrice": "10",
        "maximumPrice": "20"
    }, {
        "itemName": "Grapes",
        "unitofPrice": "Kg",
        "minimumPrice": "30",
        "maximumPrice": "40"
    }],
    "state": "xyz",
    "district": 4,
    "marketPlace": 5001,
    "marketName": "pmc",
    "category": "Fruits"
}

Controller.java

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;


public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    @Column(name = "itemName")
    private String itemName;

    @Column(name = "unitofPrice")
    private String unitofPrice;

    @Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
    private Float minimumPrice;

    @Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
    private Float maximumPrice;

@RequestMapping(value = {"/saveAnalysis"} , method = RequestMethod.POST,consumes = "application/json")
@ResponseBody
public MarketPrice bulkSaveMarketAnalysis(@RequestBody 
        String marketPrices, HttpServletResponse response,
        HttpServletRequest request) throws JsonProcessingException, IOException, JSONException{

    MarketPrice marketPrice1 = new MarketPrice();
    System.out.println("Json Data"+marketPrices);//here am getting valid nested json from UI
    Gson gson = new Gson();
    MarketPrice marketPrice = gson.fromJson(marketPrices, MarketPrice.class);//converting it into Entity type all values are present in it.
    //Am strucked after this,How to save nested json into DB.

    String marketDataResponse =  analyserService.saveListOfMarketPrice(marketPrice);
    marketPrice1.setStatusMessage("success");
    return marketPrice1;
}

public String saveListOfMarketPrice(MarketPrice marketPrice) {
    System.out.println("In Analyser DAO fro bulk saving");
    final Session session = getSession();
    session.beginTransaction();
    marketPrice.setAnalysisDate(new Date());
    for (Items item : marketPrice.marketPrices) {
       marketPrice.currentItem = item;
       marketPrice.setItemName(marketPrice.currentItem.getItemName());
       marketPrice.setUnitofPrice(marketPrice.currentItem.getUnitofPrice());
       marketPrice.setMinimumPrice(marketPrice.currentItem.getMinimumPrice());
       marketPrice.setMaximumPrice(marketPrice.currentItem.getMaximumPrice());
        session.save(marketPrice);
    }
    session.getTransaction().commit();
    session.close();
    return "success";
}

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;

 @Transient
 public Items currentItem;

@Column(name = "itemName")
public String getItemName() {
    return this.currentItem.itemName;
}

@Column(name = "unitofPrice")
public String getUnitofPrice() {
    return this.currentItem.unitofPrice;
}

@Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
public Float getMinimumPrice() {
    return this.currentItem.minimumPrice;
}

@Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
public Float getMaximumPrice() {
    return this.currentItem.maximumPrice;
}

@Transient
public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    public String itemName;

    public String unitofPrice;

    public Float minimumPrice;

    public Float maximumPrice;

public String saveListOfMarketPrice(MarketPrice marketPrice) {
        System.out.println("In Analyser DAO fro bulk saving");
        final Session session = getSession();
        session.beginTransaction();
        for (Items item : marketPrice.marketPrices) {
           marketPrice.currentItem = item;
           session.save(marketPrice);
        }
        session.getTransaction().commit();
        session.close();
        return "success";
    }

DAO.java

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;


public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    @Column(name = "itemName")
    private String itemName;

    @Column(name = "unitofPrice")
    private String unitofPrice;

    @Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
    private Float minimumPrice;

    @Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
    private Float maximumPrice;

@RequestMapping(value = {"/saveAnalysis"} , method = RequestMethod.POST,consumes = "application/json")
@ResponseBody
public MarketPrice bulkSaveMarketAnalysis(@RequestBody 
        String marketPrices, HttpServletResponse response,
        HttpServletRequest request) throws JsonProcessingException, IOException, JSONException{

    MarketPrice marketPrice1 = new MarketPrice();
    System.out.println("Json Data"+marketPrices);//here am getting valid nested json from UI
    Gson gson = new Gson();
    MarketPrice marketPrice = gson.fromJson(marketPrices, MarketPrice.class);//converting it into Entity type all values are present in it.
    //Am strucked after this,How to save nested json into DB.

    String marketDataResponse =  analyserService.saveListOfMarketPrice(marketPrice);
    marketPrice1.setStatusMessage("success");
    return marketPrice1;
}

public String saveListOfMarketPrice(MarketPrice marketPrice) {
    System.out.println("In Analyser DAO fro bulk saving");
    final Session session = getSession();
    session.beginTransaction();
    marketPrice.setAnalysisDate(new Date());
    for (Items item : marketPrice.marketPrices) {
       marketPrice.currentItem = item;
       marketPrice.setItemName(marketPrice.currentItem.getItemName());
       marketPrice.setUnitofPrice(marketPrice.currentItem.getUnitofPrice());
       marketPrice.setMinimumPrice(marketPrice.currentItem.getMinimumPrice());
       marketPrice.setMaximumPrice(marketPrice.currentItem.getMaximumPrice());
        session.save(marketPrice);
    }
    session.getTransaction().commit();
    session.close();
    return "success";
}

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;

 @Transient
 public Items currentItem;

@Column(name = "itemName")
public String getItemName() {
    return this.currentItem.itemName;
}

@Column(name = "unitofPrice")
public String getUnitofPrice() {
    return this.currentItem.unitofPrice;
}

@Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
public Float getMinimumPrice() {
    return this.currentItem.minimumPrice;
}

@Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
public Float getMaximumPrice() {
    return this.currentItem.maximumPrice;
}

@Transient
public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    public String itemName;

    public String unitofPrice;

    public Float minimumPrice;

    public Float maximumPrice;

public String saveListOfMarketPrice(MarketPrice marketPrice) {
        System.out.println("In Analyser DAO fro bulk saving");
        final Session session = getSession();
        session.beginTransaction();
        for (Items item : marketPrice.marketPrices) {
           marketPrice.currentItem = item;
           session.save(marketPrice);
        }
        session.getTransaction().commit();
        session.close();
        return "success";
    }

在对DAO进行这些更改之后，它最终保存了

谢谢。

您应该为整个Json ant创建一个更大的实体，它将在onetomany上列出您的marketPrice对象。请阅读该注释。并同时解析整个传入对象，而不仅仅是其中的市场价格列表。您可以在此处阅读如何解析整个对象：

你需要像这样的东西： JsonObject rootObj=parser.parse（json.getAsJsonObject（）

然后，您应该在实体中描述该结构：

@Entity
@Data
@Table(name = "your_table")
public class YourEntity{
//you should describe your parameters here too
//of the parsed json. it has other data in it not only the list of `MarketPrices`...


    @OneToMany(mappedBy = "yourEntity",
            cascade = {CascadeType.PERSIST, CascadeType.MERGE},
            fetch = FetchType.LAZY, orphanRemoval = true)
    private List<MarketPrice> prices;

@实体
@资料
@表（name=“您的表”）
公共类实体{
//你也应该在这里描述你的参数
//解析后的json。它还有其他数据，不仅仅是“MarketPrices”列表。。。
@OneToMany（mappedBy=“yourEntity”，
cascade={CascadeType.PERSIST，CascadeType.MERGE}，
fetch=FetchType.LAZY，OLINDEMOTION=true）
私人标价；

…

如评论中所述，您可以按如下方式修改代码，使其按预期工作

MarketPrice.java

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;


public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    @Column(name = "itemName")
    private String itemName;

    @Column(name = "unitofPrice")
    private String unitofPrice;

    @Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
    private Float minimumPrice;

    @Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
    private Float maximumPrice;

@RequestMapping(value = {"/saveAnalysis"} , method = RequestMethod.POST,consumes = "application/json")
@ResponseBody
public MarketPrice bulkSaveMarketAnalysis(@RequestBody 
        String marketPrices, HttpServletResponse response,
        HttpServletRequest request) throws JsonProcessingException, IOException, JSONException{

    MarketPrice marketPrice1 = new MarketPrice();
    System.out.println("Json Data"+marketPrices);//here am getting valid nested json from UI
    Gson gson = new Gson();
    MarketPrice marketPrice = gson.fromJson(marketPrices, MarketPrice.class);//converting it into Entity type all values are present in it.
    //Am strucked after this,How to save nested json into DB.

    String marketDataResponse =  analyserService.saveListOfMarketPrice(marketPrice);
    marketPrice1.setStatusMessage("success");
    return marketPrice1;
}

public String saveListOfMarketPrice(MarketPrice marketPrice) {
    System.out.println("In Analyser DAO fro bulk saving");
    final Session session = getSession();
    session.beginTransaction();
    marketPrice.setAnalysisDate(new Date());
    for (Items item : marketPrice.marketPrices) {
       marketPrice.currentItem = item;
       marketPrice.setItemName(marketPrice.currentItem.getItemName());
       marketPrice.setUnitofPrice(marketPrice.currentItem.getUnitofPrice());
       marketPrice.setMinimumPrice(marketPrice.currentItem.getMinimumPrice());
       marketPrice.setMaximumPrice(marketPrice.currentItem.getMaximumPrice());
        session.save(marketPrice);
    }
    session.getTransaction().commit();
    session.close();
    return "success";
}

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;

 @Transient
 public Items currentItem;

@Column(name = "itemName")
public String getItemName() {
    return this.currentItem.itemName;
}

@Column(name = "unitofPrice")
public String getUnitofPrice() {
    return this.currentItem.unitofPrice;
}

@Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
public Float getMinimumPrice() {
    return this.currentItem.minimumPrice;
}

@Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
public Float getMaximumPrice() {
    return this.currentItem.maximumPrice;
}

@Transient
public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    public String itemName;

    public String unitofPrice;

    public Float minimumPrice;

    public Float maximumPrice;

public String saveListOfMarketPrice(MarketPrice marketPrice) {
        System.out.println("In Analyser DAO fro bulk saving");
        final Session session = getSession();
        session.beginTransaction();
        for (Items item : marketPrice.marketPrices) {
           marketPrice.currentItem = item;
           session.save(marketPrice);
        }
        session.getTransaction().commit();
        session.close();
        return "success";
    }

DAO.java

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;


public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    @Column(name = "itemName")
    private String itemName;

    @Column(name = "unitofPrice")
    private String unitofPrice;

    @Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
    private Float minimumPrice;

    @Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
    private Float maximumPrice;

@RequestMapping(value = {"/saveAnalysis"} , method = RequestMethod.POST,consumes = "application/json")
@ResponseBody
public MarketPrice bulkSaveMarketAnalysis(@RequestBody 
        String marketPrices, HttpServletResponse response,
        HttpServletRequest request) throws JsonProcessingException, IOException, JSONException{

    MarketPrice marketPrice1 = new MarketPrice();
    System.out.println("Json Data"+marketPrices);//here am getting valid nested json from UI
    Gson gson = new Gson();
    MarketPrice marketPrice = gson.fromJson(marketPrices, MarketPrice.class);//converting it into Entity type all values are present in it.
    //Am strucked after this,How to save nested json into DB.

    String marketDataResponse =  analyserService.saveListOfMarketPrice(marketPrice);
    marketPrice1.setStatusMessage("success");
    return marketPrice1;
}

public String saveListOfMarketPrice(MarketPrice marketPrice) {
    System.out.println("In Analyser DAO fro bulk saving");
    final Session session = getSession();
    session.beginTransaction();
    marketPrice.setAnalysisDate(new Date());
    for (Items item : marketPrice.marketPrices) {
       marketPrice.currentItem = item;
       marketPrice.setItemName(marketPrice.currentItem.getItemName());
       marketPrice.setUnitofPrice(marketPrice.currentItem.getUnitofPrice());
       marketPrice.setMinimumPrice(marketPrice.currentItem.getMinimumPrice());
       marketPrice.setMaximumPrice(marketPrice.currentItem.getMaximumPrice());
        session.save(marketPrice);
    }
    session.getTransaction().commit();
    session.close();
    return "success";
}

@Entity
@Table(name = "MarketPrice")

public class MarketPrice {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "itemId")
private Long itemId;

@Column(name = "analysisDate")
private Date analysisDate;

@Column(name = "marketName")
private String marketName;

@Column(name = "category")
private String category;

@Column(name = "marketPlace")
private String marketPlace;

@Column(name = "state")
private String state;

@Column(name = "district")
private String district;

 @Transient
 public Items currentItem;

@Column(name = "itemName")
public String getItemName() {
    return this.currentItem.itemName;
}

@Column(name = "unitofPrice")
public String getUnitofPrice() {
    return this.currentItem.unitofPrice;
}

@Column(name = "minimumPrice",columnDefinition = "Float(10,2)")
public Float getMinimumPrice() {
    return this.currentItem.minimumPrice;
}

@Column(name = "maximumPrice",columnDefinition = "Float(10,2)")
public Float getMaximumPrice() {
    return this.currentItem.maximumPrice;
}

@Transient
public ArrayList<Items> marketPrices;

public class Items implements Serializable {

    private static final long serialVersionUID = -2428562977284114465L;

    @Id
    @Column(name="id")
    private int id;

    public String itemName;

    public String unitofPrice;

    public Float minimumPrice;

    public Float maximumPrice;

public String saveListOfMarketPrice(MarketPrice marketPrice) {
        System.out.println("In Analyser DAO fro bulk saving");
        final Session session = getSession();
        session.beginTransaction();
        for (Items item : marketPrice.marketPrices) {
           marketPrice.currentItem = item;
           session.save(marketPrice);
        }
        session.getTransaction().commit();
        session.close();
        return "success";
    }

据我所知，从json到pojo的转换是正确的？此AnalyzerService是您的DAO.java？最后，我认为您不需要为保存每个marketprice创建for循环。保存marketprice对象将在一个实例中保存父对象和子对象（据我所知）.但是你需要在MarketPlace和Items类之间创建关系，比如OneToMany，你在两个表之间的映射在哪里，即1到Many？我在回答中描述了我为两个表添加了映射，请检查一下。我添加了以前保存的DB格式。我只需要以该格式保存。即使我也不想要marketPrice列。org.hibernate.TransactionException:事务未成功启动…………并且ITEMS类中的所有列都保存空值我已移动了行

session.getTransaction（）.commit（）

退出

for

循环。itemName、unitofPrice、minimumPrice和maxPrice保存为空值根据您的注释确认json是否正确设置为

marketPrices

对象//将其转换为实体类型所有值都存在于其中？