相关疑难解决方法(0)

使用Spring 3.0,我可以有一个可选的路径变量吗？

例如

@RequestMapping(value = "/json/{type}", method = RequestMethod.GET)
public @ResponseBody TestBean testAjax(
        HttpServletRequest req,
        @PathVariable String type,
        @RequestParam("track") String track) {
    return new TestBean();
}

在这里,我想/json/abc或/json称为相同的方法.
一个明显的解决方法是声明type为请求参数:

@RequestMapping(value = "/json", method = RequestMethod.GET)
public @ResponseBody TestBean testAjax(
        HttpServletRequest req,
        @RequestParam(value = "type", required = false) String type,
        @RequestParam("track") String track) {
    return new TestBean();
}

然后/json?type=abc&track=aa或/json?track=rr将工作

我在Spring MVC中有一个带有可选路径变量的方法.我试图在没有提供可选路径变量的情况下测试它.

来自Controller的片段,用于调用的资源URI-

@RequestMapping(value = "/some/uri/{foo}/{bar}", method = RequestMethod.PUT)
public <T> ResponseEntity<T> someMethod(@PathVariable("foo") String foo, @PathVariable(value = "bar", required = false) String bar) {

    LOGGER.info("foo: {}, bar: {}", foo, bar);
}

我使用MockMvc测试的片段 -

//inject context
@Autowired
private WebApplicationContext webApplicationContext;

protected MockMvc mockMvc;

@Before
public void setup() {
    //build mockMvc
    mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
}

@Test
public void someMethodTest() throws Exception {
    //works as expected
    mockMvc.perform(put("/some/uri/{foo}/{bar}", "foo", "bar"))
            .andExpect(status().isOk()); //works

    //following doesn't work

    //pass null for optional
    mockMvc.perform(put("/some/uri/{foo}/{bar}", "foo", null))
            .andExpect(status().isOk()); //throws …

我想以下列格式将参数传递给我的Web服务:

HTTP://.../greetings/neil/1

而不是

HTTP://.../greetings名称=尼尔&ID = 1

所以我改变了我的代码(注意,我只包含了代码中的第一个参数):

@RequestMapping("/greeting")
public Greeting greeting(@RequestParam(value="name", defaultValue="World") String name) {
    return new Greeting(counter.incrementAndGet(),
                        String.format(template, name));
}

至:

@RequestMapping
public Greeting greeting(@PathVariable String name) {
    return new Greeting(counter.incrementAndGet(),
                        String.format(template, name));
}

哪个有效,但我不知道如何将默认值添加到@PathVariable,以便例如:

HTTP://.../greetings/

HTTP://.../greetings/neil/

可以像查询参数一样工作.

我该怎么做呢？我想也许它会传递null,但它只会产生页面错误.

我想答案可能是添加多个重载,但听起来有点混乱.

谢谢.

谢谢.