使用SpringMVC框架時，當我做表單回顯時。

情景描述。Employee 類有一個Department類的屬性。這兩個類存在多對一關聯關系。

下面是Employee類的屬性的定義。

public class Employee {private Integer id;private String name;private String email;private int gender;private Department department; }

下面是Department類的屬性的定義。

public class Department {private Integer id;private String departmentName; }

當我在添加Employee 對象的頁面做部門信息的表單回顯時。相關的jsp頁面如下。

<form:form action="input" method="POST" modelAttribute="employee">Name: <form:input path="name"/><br>Email: <form:input path="email"/><br><%Map<Integer, String> genders = new HashMap();genders.put(0, "Female");genders.put(1, "Male");request.setAttribute("genders", genders);%>Gender: <form:radiobuttons path="gender" items="${genders}"/><br><%-- jstl是支持級聯屬性的，在這里我想選擇的部門id，則直接寫Employee類中的department屬性再".id"就可以了。而后面的itemLabel 屬性和 itemValue 屬性。就不用再加department這個前綴了。直接寫Department類的屬性名稱即可。Department: <form:select path="department.id" items="${departments}" itemLabel="department.departmentName" itemValue="department.id"></form:select>--%>Department: <form:select path="department.id" items="${departments}" itemLabel="departmentName" itemValue="id"></form:select><br><input type="submit" name="Submit"><br></form:form>

在上述jsp頁面的代碼中，如果把注釋里的代碼跟注釋外面的代碼換一下就會出現異常。NotReadablePropertyException

異常如下：

org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/views/input.jsp at line 3936: Department: <form:select path="department.id" items="${departments}" 37: itemLabel="department.departmentName" itemValue="department.id"></form:select> 38: --%> 39: Department: <form:select path="department.id" items="${departments}" 40: itemLabel="department.departmentName" itemValue="department.id"></form:select> 41: <br> 42: <input type="submit" name="Submit"> org.springframework.beans.NotReadablePropertyException: Invalid property 'department' of bean class [com.zcd.ssh.beans.Department]: Bean property 'department' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:633)org.springframework.beans.AbstractNestablePropertyAccessor.getNestedPropertyAccessor(AbstractNestablePropertyAccessor.java:850)org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyAccessorForPropertyPath(AbstractNestablePropertyAccessor.java:827)org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:622)org.springframework.web.servlet.tags.form.OptionWriter.doRenderFromCollection(OptionWriter.java:202)org.springframework.web.servlet.tags.form.OptionWriter.renderFromCollection(OptionWriter.java:180)org.springframework.web.servlet.tags.form.OptionWriter.writeOptions(OptionWriter.java:133)

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轉載于:https://www.cnblogs.com/GooPolaris/p/7141355.html

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