Spring Boot Failed to convert value of type ‘xxx‘ to required type ‘xxx‘问题解决

最新推荐文章于 2025-06-18 09:45:00 发布

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最新推荐文章于 2025-06-18 09:45:00 发布 · 5.2k 阅读

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问题描述：

org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'java.lang.Long';

问题分析：

1、使用Swagger调试地址栏传参的接口时，参数类型paramType设置为query，导致调用接口报错。

    @DeleteMapping("delete/{id}")
    @ApiOperation(value = "删除")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "ID", paramType = "query", dataType = "Long", required = true)
    })
    public String delete(@PathVariable("id") Long id){
        return "";
    }

解决办法：将paramType设置为path，代表地址栏传参。

    @DeleteMapping("delete/{id}")
    @ApiOperation(value = "删除")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "ID", paramType = "path", dataType = "Long", required = true)
    })
    public String delete(@PathVariable("id") Long id){
        return "";
    }

2、后端接口