Spring Boot 配置相关问题

一、Spring Boot修改最大上传文件限制

1. 报错信息：

   The field file exceeds its maximum permitted size of 1048576 bytes.

2. SpringBoot默认配置：

   每个文件的配置最大为1Mb，单次请求的文件的总数不能大于10Mb。

3. 配置方法：

# Spring Boot 1.3.x或者之前
multipart.maxFileSize=100Mb
multipart.maxRequestSize=1000Mb

# Spring Boot 1.4.x
spring.http.multipart.maxFileSize=100Mb
spring.http.multipart.maxRequestSize=1000Mb

# Spring Boot 2.0之后
spring.servlet.multipart.max-file-size=100MB
spring.servlet.multipart.max-request-size=1000MB
           

二、mysql数据源配置

1. 报错信息：

   Unknown initial character set index ‘255’ received from server. Initial client character set can be forced via the ‘characterEncoding’ property.

2. 配置方法：

   在url后拼接

   ?useUnicode=true&characterEncoding=utf8

# mysql
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=root