Detailed introduction to SpringBoot2 configuration (code example)

This article brings you a detailed introduction (code example) about SpringBoot2 configuration. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1.Properties and Yaml

SpringBoot supports two configuration files, properties and yaml application.properties/application.yml

Yaml is simple to use

1.Introduction to yaml

yaml is data-centric and is more suitable for configuration files than json and xml

2.yaml basic syntax

k: v: A key-value pair in the form, : must be followed by a space
Use spaces to indent to control hierarchical relationships
Case sensitive

Example:

server: port: 8081 # 设置默认端口号 servlet: path: /init

How to write the value

k: v Write directly

[No single or double quotes are required for strings by default]

"": double quotes; special characters in the string will not be escaped;

'': Single quotes; special characters will be escaped, and the special characters will end up being just ordinary string data

Object

k: v: Write the object on the next line The relationship between attributes and values

For example:

persion: name: zhangsan age: 10

Inline writing:

persion: {name: zhangsan,age: 10}

Array (List, Set, Map)

Ordinary array, List, Set uses - value to represent an element in the array

arrays: - arrays1 - arrays2 - arrays3

Map uses the form of k: v to represent

map: k1: v1 k2: v2 k3: v3

Use configuration file injection

Introduce dependencies in pom.xml , used by the annotation processor to generate its own metadata

 org.springframework.boot spring-boot-configuration-processor true 

Entity class:

/** * persion类 */ @Component @ConfigurationProperties(prefix = "persion") public class Persion { private String name; private int age; private boolean isMan; private Date birth; private String[] hobbys; private Map skills; private List enjoys; // 省略getter setter toString }

yaml configuration:

persion: name: zhangsan age: 20 isMan: true birth: 1997/11/12 hobbys: - 篮球 - 足球 - 乒乓球 skills: java: javase python: ai enjoys: - eating - running - playgames

Test class

@Autowired Persion persion; @Test public void contextLoads() { System.out.println(persion); }

2. Server configuration

Change port:

server.port=8081

Change context access path, SpringBoot default sample path is "/":

server.servlet.context-path=/base

Common server configuration

server.port:SpringBoot监听端口 server.error.path:错误处理路径 server.servlet.context-path:配置SpringBoot默认上下文路径

Three log configuration

Define log level

Log level ERROR WARN DEBUF INFO TRACE level from high to low

# 输出日志级别 ERROR WARN DEBUF INFO TRACE，日志只会打印当前级别，以及高于当前级别的日志 logging.level.root=info

Output log to file

# 输出日志到文件 logging.file=/my.log

Define log Output format
Log format output to the console:

logging.pattern.console=【%level %date %logger %thread %M %L %m】 %n

Log format output to the log file:

# 定义输出到文件的日志格式 logging.pattern.file=【%level %date %logger %thread %M %L %m】 %n

Basic parameters of log format

属性 内容 %level 表示输出日志级别 %date 表示日期发生时的时间 %logger 用于输出Logger名字，包名+类名，{n}限定输出长度 %thread 当前线程名 %M 日志发生时方法的名字 %L 日志调用所在代码行 %m 日志消息 %n 日志换行

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