class TestController extends BaseController
{
    private final static Map<Integer, UserEntity> users = new LinkedHashMap<Integer, UserEntity>();
    {
        users.put(1, new UserEntity(1, "admin", "admin123", "15888888888"));
        users.put(2, new UserEntity(2, "ry", "admin123", "15666666666"));
    }

    @ApiOperation("获取用户列表")
    @GetMapping("/list")
    public R<List<UserEntity>> userList()
    {
        List<UserEntity> userList = new ArrayList<UserEntity>(users.values());
        return R.ok(userList);
    }

    @ApiOperation("获取用户详细")
    @ApiImplicitParam(name = "userId", value = "用户ID", required = true, dataType = "int", paramType = "path", dataTypeClass = Integer.class)
    @GetMapping("/{userId}")
    public R<UserEntity> getUser(@PathVariable Integer userId)
    {<FILL_FUNCTION_BODY>}

    @ApiOperation("新增用户")
    @ApiImplicitParams({
        @ApiImplicitParam(name = "userId", value = "用户id", dataType = "Integer", dataTypeClass = Integer.class),
        @ApiImplicitParam(name = "username", value = "用户名称", dataType = "String", dataTypeClass = String.class),
        @ApiImplicitParam(name = "password", value = "用户密码", dataType = "String", dataTypeClass = String.class),
        @ApiImplicitParam(name = "mobile", value = "用户手机", dataType = "String", dataTypeClass = String.class)
    })
    @PostMapping("/save")
    public R<String> save(UserEntity user)
    {
        if (StringUtils.isNull(user) || StringUtils.isNull(user.getUserId()))
        {
            return R.fail("用户ID不能为空");
        }
        users.put(user.getUserId(), user);
        return R.ok();
    }

    @ApiOperation("更新用户")
    @PutMapping("/update")
    public R<String> update(@RequestBody UserEntity user)
    {
        if (StringUtils.isNull(user) || StringUtils.isNull(user.getUserId()))
        {
            return R.fail("用户ID不能为空");
        }
        if (users.isEmpty() || !users.containsKey(user.getUserId()))
        {
            return R.fail("用户不存在");
        }
        users.remove(user.getUserId());
        users.put(user.getUserId(), user);
        return R.ok();
    }

    @ApiOperation("删除用户信息")
    @ApiImplicitParam(name = "userId", value = "用户ID", required = true, dataType = "int", paramType = "path", dataTypeClass = Integer.class)
    @DeleteMapping("/{userId}")
    public R<String> delete(@PathVariable Integer userId)
    {
        if (!users.isEmpty() && users.containsKey(userId))
        {
            users.remove(userId);
            return R.ok();
        }
        else
        {
            return R.fail("用户不存在");
        }
    }
}

        if (!users.isEmpty() && users.containsKey(userId))
        {
            return R.ok(users.get(userId));
        }
        else
        {
            return R.fail("用户不存在");
        }
    
<methods>public non-sealed void <init>() ,public com.ruoyi.common.core.domain.AjaxResult error() ,public com.ruoyi.common.core.domain.AjaxResult error(java.lang.String) ,public java.lang.Long getDeptId() ,public com.ruoyi.common.core.domain.model.LoginUser getLoginUser() ,public java.lang.Long getUserId() ,public java.lang.String getUsername() ,public void initBinder(org.springframework.web.bind.WebDataBinder) ,public java.lang.String redirect(java.lang.String) ,public com.ruoyi.common.core.domain.AjaxResult success() ,public com.ruoyi.common.core.domain.AjaxResult success(java.lang.String) ,public com.ruoyi.common.core.domain.AjaxResult success(java.lang.Object) ,public com.ruoyi.common.core.domain.AjaxResult warn(java.lang.String) <variables>protected final org.slf4j.Logger logger