spring註釋錯誤找不到類型驗證器：java.lang.Double

Question

我正在使用spring 3.1和annotations開發應用程序。

我寫型號，如下

package servlet.model; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.Id; 
import javax.persistence.Table; 
import org.hibernate.validator.constraints.NotEmpty; 
@Entity 
@Table(name="products") 
public class Product { 
@Id 
@GeneratedValue 
private Integer product_id; 
@NotEmpty(message = "Category should not be blank.") 
private String cat_id; 
@NotEmpty(message = "Name should not be blank.") 
private String product_name; 

private String specification; 
@NotEmpty(message = "Purchase Price should not be blank.") 
private double purchase_price; 
@NotEmpty(message = "Sales Price should not be blank.") 
private double sales_price; 
@NotEmpty(message = "Stock should not be blank.") 
private double stock; 
@NotEmpty(message = "Status should not be blank.") 
private String status; 

@Column(name="product_id") 
public Integer getProduct_id() { 
    return product_id; 
} 
public void setProduct_id(Integer product_id) { 
    this.product_id = product_id; 
} 

@Column(name="cat_id") 
public String getCat_id() { 
    return cat_id; 
} 
public void setCat_id(String cat_id) { 
    this.cat_id = cat_id; 
} 

@Column(name="product_name") 
public String getProduct_name() { 
    return product_name; 
} 
public void setProduct_name(String product_name) { 
    this.product_name = product_name; 
} 

@Column(name="specification") 
public String getSpecification() { 
    return specification; 
} 
public void setSpecification(String specification) { 
    this.specification = specification; 
} 

@Column(name="purchase_price") 
    public double getPurchase_price() { 
return purchase_price; 
} 
public void setPurchase_price(double purchase_price) { 
this.purchase_price = purchase_price; 
} 

@Column(name="sales_price") 
    public double getSales_price() { 
return sales_price; 
} 
public void setSales_price(double sales_price) { 
    this.sales_price = sales_price; 
} 

@Column(name="stock") 
public double getStock() { 
    return stock; 
} 
public void setStock(double stock) { 
    this.stock = stock; 
} 

@Column(name="status") 
public String getStatus() { 
return status; 
} 
public void setStatus(String status) { 
this.status = status; 
} 

} 

同時提交我收到請求處理失敗的形式;嵌套異常是javax.validation.UnexpectedTypeException：找不到可用於類型的驗證程序：java.lang.Double

Answer 1

Anotation @NotEmpty支持類型：字符串，集合，映射和數組。你可以試試@NotNull anotation。或另一種加法

看到這個Validation step by step