SpringBoot 报错锦集

1、文件上传时，报“415 unsupported type”。

解决：使用@ModelAttribute 而不是@RequestBody。

测试：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3"><head><title>Hello World!</title><meta charset="utf-8">
</head><body><form method="POST" enctype="multipart/form-data" action="http://127.0.0.1:8888/upload"><p>文件1：<input type="text" name="id" /></p><p>文件2：<input type="text" name="name" /></p><p>文件3：<input type="file" name="file" /></p><p><input type="submit" value="上传" /></p></form>
</body></html>

    @RequestMapping(value = "/upload", method = RequestMethod.POST)public String upload(@ModelAttribute FileUpload fileUpload) {return "ok";}

2、Failed to deserialize payload. Is the byte array a result of反序列化错误。

解决：清空redis缓存。

1、redis安装目录下输入cmd                            2、redis-cli -p 端口号3、flushdb    清除当前数据库缓存4、flushall     清除整个redis所有缓存

3、下载文件报错org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation

解决：函数返回改为void，或者使用函数@Controller。

4、位置属性 FlowableException: Unknown property used in expression

解决：记得加getter方法呀。

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