我有一个Mapsauda包含2个帐户详细信息买方和卖方。我希望通过使用souda entryform的thmelaf和model进行查找和获取帐户来设置这两个细节。由于未能将字符串转换为自定义类帐户，我收到错误消息。如何解决这个问题。。？
帐户pojo

package org.temp.bean.pojo;

import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.PositiveOrZero;

import org.hibernate.validator.constraints.Length;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class AccountPOJO {
    @NotBlank
    @NotNull
    @Length(min = 2,max=255)
    private String name;
    @NotNull
    @NotBlank
    @Length(min = 2,max=255)
    private String city;
    @PositiveOrZero
    @Length(min=0,max = 15)
    private Integer gstno;
    @Length(min = 0,max = 14)
    @PositiveOrZero
    private Integer fssai;
}

索达波霍

package org.temp.bean.pojo;

import java.util.Date;

import javax.validation.constraints.Positive;
import javax.validation.constraints.PositiveOrZero;

import org.temp.bean.OptionEnum;
import org.temp.bean.QuantityType;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.format.annotation.DateTimeFormat.ISO;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class SaudaPOJO {
    @DateTimeFormat(iso = ISO.DATE)
    private Date saudaStartDate;
    @DateTimeFormat(iso = ISO.DATE)
    private Date saudaEndDate;
    private AccountPOJO sellerAccount;
    private AccountPOJO buyerAccount;
    @Positive
    private Integer rate;
    @Positive
    private Integer quantity;
    private String tankerNo;
    private String refNo;
    @PositiveOrZero
    private Integer deposit;
    private String description;
    private OptionEnum options;
    private QuantityType type;  
}

html代码段

<label for="sellerAccount">Seller Account</label> 
                    <input
                        list="sellerAccounts" th:field="*{sellerAccount}"
                        id="sellerAccount" name="sellerAccount"
                        placeholder="Seller Account name" class="form-control"
                        th:error-class="has-error">
                    <datalist id="sellerAccounts" >
                        <select th:each="account: ${Accounts}">
                            <option th:text="${account.name}" th:value="${account.name}"></option>
                        </select>
                    </datalist>
                    <div class="form-group"
                        th:class="${#fields.hasErrors('sellerAccount')} ? 'form-group has-error' : 'form-group'">
                        <ul th:if="${#fields.hasErrors('sellerAccount')}">
                            <li th:each="err : ${#fields.errors('sellerAccount')}"
                                th:text="${err}">
                        </ul>
                    </div>

                    <label for="buyerAccount">Buyer's Account</label> <input
                        list="buyerAccounts" th:field="*{buyerAccount}" id="buyerAccount"
                        name="buyerAccount" placeholder="Buyer Account name"
                        class="form-control" th:error-class="has-error">
                    <datalist id="buyerAccounts" >
                        <select th:each="account: ${Accounts}">
                            <option th:text="${account.name}" th:value="${account.name}"></option>
                        </select>
                    </datalist>
                    <div class="form-group"
                        th:class="${#fields.hasErrors('buyerAccount')} ? 'form-group has-error' : 'form-group'">
                        <ul th:if="${#fields.hasErrors('buyerAccount')}">
                            <li th:each="err : ${#fields.errors('buyerAccount')}"
                                th:text="${err}">
                        </ul>
                    </div>

将页面转换为sauda时。如何通过在数据库中查找并获取关联帐户来获得字符串到类的Map。我用的Spring Boot与百里香叶和Lombok山。下面是相同错误的片段
html错误代码段
控制器

@GetMapping("/sauda/insert")
public String insertSauda(Model model)
{
    model.addAttribute(SAUDA,new SaudaPOJO());
    List<AccountPOJO> listaccounts= accountService.getAllAccount();
    model.addAttribute("Accounts",listaccounts);
    return "sauda/insertsauda";
}