1.首先進入到druid-1.0.26.jar這個jar包所在的位置，然後開啟cmd，執行命令：java -cp druid-1.0.26.jar com.alibaba.druid.filter.config.ConfigTools 123456

2.分別得到：privateKey、publicKey、password：

privateKey:MIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEAhL1ZBSEb+NIarn0/ZMWZT
ieBJV3l2x3EHB4xHQ0ldn/Nk5odL3LsKw8OQyKUfp+bkqZLBg9U2T4AuLchly1pqwIDAQABAkBLIG+Vu
5t9REzdnP2YJ04RMcKiR3akgUBRObVKX/poCiusJvvrdLIP4adfRRv40sw0tgaSktR6shDwefF/5ayBA
iEA91jBjWxE6sj/rOp7SurrhHTFkPjH041kjD3AX62wuDsCIQCJYirpsHU4l9ctcE8y19GKNryC444vg
4PnQLiEgFZtUQIhANdRuXR+auQkQ4ZovRmztYCiEpaoK3Q7Iut+mifwUOWfAiA3mojdznKTNjl8BZG4d
Us00pSXsTwSFPuk9Df6QOs6EQIhAIO163hfYMiyjEJLcent6mINAexO9yC2ZKu5BQx2Z79n

publicKey:MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAIS9WQUhG/jSGq59P2TFmU4ngSVd5dsdxBweMR
0NJXZ/zZOaHS9y7CsPDkMilH6fm5KmSwYPVNk+ALi3IZctaasCAwEAAQ==

password:eezigWTr+zZO1t4+N5O3cmhaSPxChEuhApBFg1JoBDJSwnfplMJlFBAKIgY3Oq8qdo+/nF6
TLFUUTPSpmPgNow==

3.在spring內填寫如圖：

3.這個config.decrypt.key對應的值是publicKey。