Java 自定义MVC视图实现未在SpringBoot中呈现

在Spring Boot 1.3.0应用程序中，我尝试使用单个控制器方法，仅基于路径生成HTML和CSV格式的响应（无内容协商）：

为了处理HTML格式，我有一个

src\resources\templates\htmlReport.tpl

Groovy模板。当我访问/app/report.html时，SpringBoot能够很好地定位和调用模板

要处理CSV格式，我有一个自定义视图：

@Component
public class ReportCsvView extends AbstractView {

    @Override
    public String getContentType() {
        return "text/csv";
    }

    @Override
    protected void renderMergedOutputModel(Map<String, Object> model,
            HttpServletRequest request, 
            HttpServletResponse response) throws Exception {
        PrintWriter writer = response.getWriter();
        // write CSV to writer
    } 
}

问题是，当我点击/app/report.csv时，会调用匿名ViewResolver的

resolveViewName

方法，并执行返回

ReportCsvView

实例的分支。到现在为止，一直都还不错。但是，未调用

renderMergedOutputModel

（尽管调用了两次

getContentType

方法），导致HTTP 404响应

如何使视图实际渲染

UPDATE我删除了对

getContentType

方法的覆盖；因此，

renderMergeOutputModel

现在被调用

@Component
public class ReportCsvView extends AbstractView {

    @Override
    public String getContentType() {
        return "text/csv";
    }

    @Override
    protected void renderMergedOutputModel(Map<String, Object> model,
            HttpServletRequest request, 
            HttpServletResponse response) throws Exception {
        PrintWriter writer = response.getWriter();
        // write CSV to writer
    } 
}

@Configuration
public class ReportCsvViewConfigurer extends WebMvcConfigurerAdapter {
    @Autowired
    private ReportCsvView reportCsvView;

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {
        registry.viewResolver(new ViewResolver() {
            @Override
            public View resolveViewName(String name, Locale locale) throws Exception {
                return "csvReport".equals(name) ? reportCsvView : null;
            }
        });
        super.configureViewResolvers(registry);
    }
}