SpringMVC配置文件报错MappingJacksonJsonView

Question

严重: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.web.servlet.view.json.MappingJacksonJsonView] for bean with name 'userListJson' defined in ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.view.json.MappingJacksonJsonView
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.web.servlet.view.json.MappingJacksonJsonView] for bean with name 'userListJson' defined in ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.view.json.MappingJacksonJsonView
代码：

@RequestMapping(value = "/showUserListByJson")
public String showUserListInJson(ModelMap mm) {
List userList = new ArrayList();

    Person user1 = new Person();
    user1.setUsername("tom");
    user1.setPassword("汤姆");

    Person user2 = new Person();
    user2.setUsername("john");
    user2.setPassword("约翰");

    userList.add(user1);
    userList.add(user2);

    mm.addAttribute("userList", userList);
    return "userListJson";
}

<bean id="userListJson"
    class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"
    p:renderedAttributes="userList" />

Answer 1

找找你的bean文件，看log像是userListJson类没有定义，或者就是配置错了。