我建议的解决方案：

• 指定带和不带参数的路径：@GetMapping(value = { "/path", "/path/{param}" })
• 将Path变量标记为required = false（@PathVariable(required = false) String param
• 处理参数丢失的情况并按要求响应（在您的情况下，HTTP状态为400）

极简示例

@RestController
@RequestMapping("/foo")
public class FooController {

    @GetMapping(value = { "/{firstParam}", "/" })
    public ResponseEntity<String> getFoo(@PathVariable(required = false) String firstParam) {
        if (null == firstParam) {
            return ResponseEntity.badRequest().body("The first param is required");
        }
        return ResponseEntity.ok("The first param is: " + firstParam);
    }
}

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A测试用例：

@SpringBootTest
@AutoConfigureMockMvc
class FooControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @Test
    void whenParameterIsPassesShouldReturnOk() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/foo/param"))
                .andExpect(status().isOk())
                .andExpect(content().string("The first param is: param"));
    }

    @Test
    void whenParameterIsNotPassedShouldReturnBadRequest() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/foo/"))
                .andExpect(status().isBadRequest())
                .andExpect(content().string("The first param is required"));
    }

}

型

你可以通过遵循这种方法来完成它。
@RequestMapping（“/observability-core/v1/systems”）public class YourController {

@GetMapping("/{id}")
public ResponseEntity<String> getSystemDetails(@PathVariable(required = false) String id) {
    if (id == null) {
        // Handle the case where the path variable is not provided
        return new ResponseEntity<>("ID not provided in the request.", HttpStatus.BAD_REQUEST);
    }

    // Your existing logic when the ID is provided
    return new ResponseEntity<>("System details for ID: " + id, HttpStatus.OK);
}

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