<dependency>
    <groupId>org.mindrot</groupId>
    <artifactId>jbcrypt</artifactId>
    <version>0.4</version>
</dependency>

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo_SpringBoot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo_SpringBoot</name>
    <description>Demo project for Spring Boot</description>
 
    <properties>
        <java.version>1.8</java.version>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.mindrot</groupId>
            <artifactId>jbcrypt</artifactId>
            <version>0.4</version>
        </dependency>
 
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.0.RELEASE</version>
            </plugin>
        </plugins>
    </build>
 
</project>

package com.example.controller;
 
import org.mindrot.jbcrypt.BCrypt;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class HelloController {
    @GetMapping("/test")
    public String test() {
        String password = "123456";
 
        // 加密
        String encodedPassword = BCrypt.hashpw(password, BCrypt.gensalt());
        System.out.println(encodedPassword);
 
        // 使用正確密碼驗證密碼是否正確
        boolean flag = BCrypt.checkpw(password, encodedPassword);
        System.out.println(flag);
 
        // 使用錯誤密碼驗證密碼是否正確
        flag = BCrypt.checkpw("111222", encodedPassword);
        System.out.println(flag);
 
        System.out.println("-------------------------------------------");
 
        return "test success";
    }
}