Question

我在Spring框架上使用Postgres数据库创建了Web服务。我使用JpaRepository来操作我的数据库和Rest控制器。我尝试使用jquery将对象保存到我的数据库但是我收到错误。我应该在jquery调用和rest控件中更改成功执行什么？

这是jquery调用

$.ajax({
    url: 'http://localhost:8080/products',
    type: "POST",
    data: { "productName":"product", "amount": 123, "dateArrival": 1522345884907},
    dataType: "json",
    success: function (result) {

    },
    error: function (xhr, ajaxOptions, thrownError) {
        alert(xhr.status);
        alert(thrownError);
    }
});

我在[{1}}

中使用保存对象到数据库的函数

RestController

阅读httpEntity后的字符串

@RequestMapping(value = "/products", method = RequestMethod.POST
,consumes = MediaType.ALL_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public Product saveProduct(HttpEntity<String> httpEntity){
    String json = httpEntity.getBody().trim().replaceAll("\uFFFD", "");
    ObjectMapper mapper = new ObjectMapper();
    Product product = null;
    try {
        product = mapper.readValue(json,Product.class);
    } catch (IOException e) {
        e.printStackTrace();
    }
    return service.save(product);
}

这是我的实体

productName=product&amount=123&dateArrival=1522345884907&_token=undefined

错误

@Entity

@Table(name = "Stock")
public class Product {
    public Product() {

    }

    @Id
    @GeneratedValue(generator = "increment")
    @GenericGenerator(name = "increment", strategy = "increment")

    private long id;

    @Column(name = "Product_name", nullable = false, length = 25)
    @JsonProperty("productName")
    private String productName;

    @Column(name = "Amount", nullable = false, length = 50)
    private int amount;

    @Column(name = "Arrival_date", nullable = false)
    @Temporal(TemporalType.TIMESTAMP)
    private Date dateArrival;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public Integer getAmount() {
        return amount;
    }

    public void setAmount(Integer amount) {
        this.amount = amount;
    }

    public Date getDateArrival() {
        return dateArrival;
    }

    public void setDateArrival(Date dateArrival) {
        this.dateArrival = dateArrival;
    }

    @Override
    public String toString() {
        return "Product{" +
            "id=" + id +
            ", productName='" + productName + '\'' +
            ", amount=" + amount +
            ", dateArrival=" + dateArrival +
            '}';
    }
}

Answer 1

您可以在从HttpRequest正文中读取后发布的字符串吗？

您也可以尝试在没有unicode字符替换的情况下运行它，即删除replaceAll("\uFFFD", "")

Answer 2

您的输入字符串：

productName=product&amount=123&dateArrival=1522345884907&_token=undefined

不是JSON。虽然异常不是非常具体，但它确实表明第一个字符（'p'）是意外的; JSON需要以{字符开头（可能有前导空格）。

java - json抛出JsonParseException：将json转换为java对象时出现意外的字符

2 个答案: