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我有一张桌子employee，它的属性是department和。address我想address用 JSR 300 验证类的属性。但是我在验证地址和部门类的属性时遇到了问题。到目前为止，只Employee验证了类的属性。我错过了什么吗？

public class Employee {

    private Integer id;
    @NotEmpty(message = "First Name must not be blank.")
    @Size(min = 1, max = 50)
    private String firstName;

    @NotEmpty(message = "Last Name must not be blank.")
    @Size(min = 1, max = 50)
    private String lastName;

    @Digits(message = "Salary field must not be blank.", integer=32767, fraction = 2)
    @NumberFormat(style = Style.NUMBER)
    @NotNull(message = "Salary field must not be blank.")
    private Double salary;

    @Digits(message = "Select department", integer=100, fraction = 0)
    @NumberFormat(style = Style.NUMBER)
    @NotNull(message = "Select department")
    private Integer dept_id;

    @NotEmpty(message = "Select gender")
    private String gender;
    private boolean employeeStatus;
    private Address address;
    private Department department;
}

public class Address {

    private Integer id;

    @NotEmpty(message = "Country must not be blank.")
    @Size(min = 1, max = 50)
    private String country;

    @NotEmpty(message = "City must not be blank.")
    @Size(min = 1, max = 50)
    private String city;

    @NotEmpty(message = "Street must not be blank.")
    @Size(min = 1, max = 50)
    private String street;
    private Integer emp_id;

    }

public class Department {

    private String name;
    private Integer id;

}

jsp

<form:form commandName="employee" action="addEmployee.htm"
            name="employeeForm">
            <form:errors path="*" cssClass="errorblock" element="div" />
            <fieldset>
                <form:label path="firstName">First Name</form:label>
                <form:input path="firstName" />
                <form:errors path="firstName" cssClass="error" />
                <br>

                <form:label path="lastName">Last Name</form:label>
                <form:input path="lastName" />
                <form:errors path="lastName" cssClass="error" />
                <br>

                <form:label path="address.country">Country</form:label>
                <form:input path="address.country" />
                <form:errors path="address.country" cssClass="error" />
                <br>

                <form:label path="address.city">City</form:label>
                <form:input path="address.city" />
                <form:errors path="address.city" cssClass="error" />
                <br>

                <form:label path="address.street">Street</form:label>
                <form:input path="address.street" />
                <form:errors path="address.street" cssClass="error" />
                <br>

                <form:label path="salary">Salary</form:label>
                <form:input path="salary" />
                <form:errors path="salary" cssClass="error" />
                <br>

                <form:label path="gender">Gender</form:label>
                <form:radiobutton path="gender" value="Male" />
                Male
                <form:radiobutton path="gender" value="Female" />
                Female
                <form:errors path="gender" cssClass="error" />

                <form:label path="dept_id">Department</form:label>

                <form:select path="dept_id">
                    <form:option value="" label="Please Select"></form:option>
                    <form:options items="${departmentList}" itemValue="id"
                        itemLabel="name" />
                </form:select>
                <form:errors path="dept_id" cssClass="error" />

                <label></label><input type="submit" value="Add Employee"><br>
            </fieldset>


        </form:form>

此外，当我在薪水字段中尝试随机字符串时，我得到了一个例外。

Failed to convert property value of type java.lang.String to required type java.lang.Double for property salary; nested exception is java.lang.NumberFormatException:

如何摆脱这个异常？

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1 回答 1

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尝试@Valid为约束组合添加属性。这样，Address将评估所有约束：

@Valid
 private Address address;

至于格式化异常，我不清楚您是如何或在哪里收到该错误的，但除了验证控制器中的模型（使用@Valid控制器方法参数之前的属性）之外，我建议使用CURRENCY金钱（薪水）：

@NumberFormat(style=Style.CURRENCY)
于 2012-12-20T05:54:07.167 回答