Question

我使用Spring Controller通过@RequestBody注释将JSON转换为Java。我正在调试这个，但是，正如我以前经历过的那样，我理解JSON没有映射到我的实体，但我非常好奇非映射的JSON是什么，来自Java＆＃ 39;观点。有没有办法让我的控制器可见？这是我的控制器方法：

    @PostMapping(path="/Add") // Map ONLY GET Requests
public @ResponseBody PurchaseRequestLineItem addNewPurchaseRequestLineItem (@RequestBody PurchaseRequestLineItem purchaseRequestLineItem) {

    purchaseRequestLineItemRepository.save(purchaseRequestLineItem);
    System.out.println("PurchaseRequestLineItem saved:  "+purchaseRequestLineItem);
    return purchaseRequestLineItem;
}

这是我的实体：

    package com.prs.business.purchaserequest;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import com.fasterxml.jackson.annotation.JsonIgnore;

@Entity
@Table(name="purchaserequestlineitem")
public class PurchaseRequestLineItem {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int id;
//  @Column(name="purchaserequestid")
//  private int purchaseRequestID;
    @ManyToOne
    @JoinColumn(name="PurchaseRequestID")
    @JsonIgnore
    private PurchaseRequest purchaseRequest;
    private int productID;
    private int quantity;

    public PurchaseRequestLineItem() {
        id = 0;
        //purchaseRequestID = 0;
        purchaseRequest = null;
        productID = 0;
        quantity = 0;
    }

    public PurchaseRequestLineItem(PurchaseRequest inPR, int inPdtID, int inQty) {
        purchaseRequest = inPR;
        productID = inPdtID;
        quantity = inQty;
    }

//  public PurchaseRequestLineItem(int inPRID, int inPdtID, int inQty) {
//      purchaseRequestID = inPRID;
//      productID = inPdtID;
//      quantity = inQty;
//  }
//  
    public PurchaseRequestLineItem(int inID, PurchaseRequest inPR, int inPdtID, int inQty) {
        id = inID;
        purchaseRequest = inPR;
        productID = inPdtID;
        quantity = inQty;
    }

//  public PurchaseRequestLineItem(int inID, int inPRID, int inPdtID, int inQty) {
//      id = inID;
//      purchaseRequestID = inPRID;
//      productID = inPdtID;
//      quantity = inQty;
//  }
//
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }

//  public int getPurchaseRequestID() {
//      return purchaseRequestID;
//  }
//
//  public void setPurchaseRequestID(int purchaseRequestID) {
//      this.purchaseRequestID = purchaseRequestID;
//  }
//
    public PurchaseRequest getPurchaseRequest() {
        return purchaseRequest;
    }
    public void setPurchaseRequest(PurchaseRequest purchaseRequest) {
        this.purchaseRequest = purchaseRequest;
    }
    public int getProductID() {
        return productID;
    }
    public void setProductID(int productID) {
        this.productID = productID;
    }
    public int getQuantity() {
        return quantity;
    }
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

    @Override
    public String toString() {
        return "\npurchaseRequestLineItem [id=" + id + ", purchaseRequest=" + purchaseRequest + ", productID="
                + productID + ", quantity=" + quantity + "]";
    }

}

我的属性文件中的行： spring.jackson.property命名策略= UPPER_CAMEL_CASE

Answer 1

您可以使用Error: digitalocean_volume.foovolume: "droplet_ids": this field cannot be set按原样查看请求正文

String

Answer 2

假设您使用Jackson JSON映射，正如@gtosto所说，接受@RequestBody作为String并自行执行从String到JSON的转换。

使用ObjectMapper做那个（翻译事物）。

这是一个简单的方法：

public <Type> Type getInputJson(
    final String trackId,
    final Class<Type> inputJsonClass,
    final String inputJsonString)
{
    Type returnValue;

    try
    {
        returnValue = objectMapper.readValue(
            inputJsonString,
            inputJsonClass);
    }
    catch (IOException exception)
    {
        logger.warn(
            "exception while converting inputJson.  inputJsonClass.name: {}, inputJsonString: {}",
            inputJsonClass.getName(),
            inputJsonString);

        returnValue = null;
    }

    return returnValue;
}

编辑删除我的垃圾（CoreUtil）。此外，我使用logback，因此我的日志字符串可能与您的不匹配。

第二个选项是接受您当前正在执行的@RequestBody参数，并添加WebRequest或HttpServletRequest参数。这些可以让您访问整个请求（包括请求正文）。

注意使用ObjectMapper不会使未映射的内容可用，它只是json - ＆gt;对象映射。您需要检查inputJsonString以查找未映射的值。

我使用以下3个jackson依赖项：

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>

以及以下属性：

    <jackson.version>2.2.3</jackson.version>

Spring @RequestBody映射问题 - 如何查看未映射的值？

2 个答案: