Spring MVC问题如何从两个或多个对象创建视图?

时间:2023-02-26 23:04:54 浏览:8次
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如何解决Spring MVC问题如何从两个或多个对象创建视图??

将对象包装在包装器表单类中,然后将其传递给模型。

public class MyForm{ public user; public address; // getters, setters, etc.}

然后

ModelAndView mav = new ModelAndView(); // ModelAndViewmav.addobject("myForm", new MyForm()); // e.g.

在您的模型中,地址应该附加到用户吗?换句话说,在我看来,与User有着一对多的关系Address,您应该让数据访问层处理这些问题。

@Entity@Table(name = "user")public class User{ @Id @Column(name="user_id") public Long id; @OnetoMany @JoinColumn(name = "user_id") // so the address table would have a user_id foreign key public Address address;}

解决方法

[spring3.0.5] [jboss 5.1]

一个有两个班

public class User { private String name; private String surname; private Address address;...sets and gets setters and getters }public class Address { private String street;...setters and getters }

在Controller中,我有以下代码:

@Controller public class MyController {@RequestMapping(value = "/index")public ModelAndView showForm() {ModelAndView mav = new ModelAndView();mav.setViewName("index");User user = new User();Address adr = new Address();mav.addObject("user",user);mav.addObject("adr",adr);}

现在我想在JSP中使用两个输入元素来创建

<%@taglib uri="http://www.springframework.org/tags" prefix="spring"%> <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%> <html><head><body> <form:form method="POST" commandName="user"> <form:label path="name" /> <form:input path="name" /> <form:label path="adr.street" /> <form:input path="adr.street" /> </form:form> </body> </html>

当我运行一个类似这样的异常:

org.springframework.beans.NotReadablePropertyException:Bean类[form.User]的无效属性’adr’:Bean属性’adr’不可读或具有无效的getter方法:getter的返回类型是否与getter方法的参数类型匹配。二传手?org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:707)org.springframework.be

有人可以向我解释为什么以及如何改进代码吗?

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