關於埠對映:

java程式碼中的jdbc:
db.jdbcUrl=jdbc:mysql://database:3306/Sfwefwwe

compose中的對映:”33060:3306”

{
    "version": "2",
    "services": {
        "web-shop": {
            "image": "86xxxx89/shop:v1",
            "ports": [
                "8080:8080"
            ],
            "volumes": [
                "/Volumes/files:/Volumes/files"
 

            ],
            "depends_on": [
                "database"
            ]
        },

        "database": {
            "image": "mysql:5.7",
            "ports": [
                "33060:3306"
            ],
            "volumes": [
                "/volume/mysql/data/shxxxrpro:/var/lib/mysql"
            ]
 
,
            "environment": {
                "MYSQL_DATABASE": "mysql",
                "MYSQL_USER": "root",
                "MYSQL_PASSWORD": "alex1267",
                "MYSQL_ROOT_PASSWORD":"alexx67"
            }
        }
    }
}

為什麼compose中依然是33060:3306 而不是 33060:33060?
(外網33060的初衷是不跟外面已經存在的mysql衝突)

答:因為java程式在連線mysql的時候,尋求mysql的ip是docker自動處理的(只要指定服務名稱database).
docker會從內部尋找到MySQL的ip, 此時這個ip上正確暴露的介面當然是3306 而不是33060.

當然,如果外部程式連線mysql,就要使用33060埠了