如何使用MockHttpServletRequestBuilder和jUnit将日期作为参数发布？

Question

我只能使用MockHttpServletRequestBuilder进行测试，而我只是将字符串作为参数发布。

如何将日期作为参数发布，因为我的下面的FormattingConversionService似乎无法用于jUnit测试，而我的spring基础架构没有将String值转换为Calendar值。

@Bean
    public FormattingConversionService mvcConversionService() {
        DefaultFormattingConversionService conversionService = new DefaultFormattingConversionService();
        DateFormatterRegistrar formatterRegistrar = new DateFormatterRegistrar();
        formatterRegistrar.setFormatter(new DateFormatter("yyyy-MM-dd"));
        formatterRegistrar.registerFormatters(conversionService);
        return conversionService;
    }

我试图做的测试是：

    @Test @Transactional
    public void shouldSaveABill() throws Exception {
        String dueDate = "05/25/2017";
        MockHttpServletRequestBuilder request = MockMvcRequestBuilders
                .post("/saveBill")
                .contentType(MediaType.APPLICATION_FORM_URLENCODED)
                .param("id", "1")
                .param("description", "Food")
                .param("dueDate", "05/25/2017")
                .param("value", "150");

        mockMvc.perform(request)
            .andExpect(MockMvcResultMatchers.status().is(302))
            .andExpect(MockMvcResultMatchers.forwardedUrl("/someUrl"));
    }

在调试测试时，我收到错误：

Field error in object 'bill' on field 'dueDate': rejected value [05/25/2017]; codes [typeMismatch.bill.dueDate,typeMismatch.dueDate,typeMismatch.java.util.Calendar,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [bill.dueDate,dueDate]; arguments []; default message [dueDate]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Calendar' for property 'dueDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.util.Calendar] for value '05/25/2017'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [05/25/2017]]

请问，使用jUnit，spring和MockHttpServletRequestBuilder测试具有Calendar类型字段的实体的持久性的最佳方法是什么？还有另一种方法可以实现这一目标吗？我感谢任何帮助。感谢。