修改默认加密方式逻辑，可在ruoyi-admin主项目里继承RyPasswordEncoder，覆盖默认加密方式

@Component
public class MyPasswordEncoder implements RyPasswordEncoder {

    @Override
    public String encode(String username, String password, String salt) {
        return HrPasswordUtil.encode(salt, password);
    }
}

ruoyi-framework/src/main/java/com/ruoyi/framework/config/AuthenticationBeanConfig.java

@@ -0,0 +1,25 @@
+package com.ruoyi.framework.config;
+
+import com.ruoyi.framework.shiro.config.DefaultPasswordEncoder;
+import com.ruoyi.framework.shiro.config.RyPasswordEncoder;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * 认证相关的扩展点配置。配置在这里的bean，业务系统都可以通过声明同类型或同名的bean来覆盖安全
+ * 模块默认的配置。
+ */
+@Configuration
+public class AuthenticationBeanConfig {
+    /**
+     * 默认密码处理器
+     *
+     * @return
+     */
+    @Bean
+    @ConditionalOnMissingBean(RyPasswordEncoder.class)
+    public RyPasswordEncoder passwordEncoder() {
+        return new DefaultPasswordEncoder();
+    }
+}

ruoyi-framework/src/main/java/com/ruoyi/framework/shiro/config/DefaultPasswordEncoder.java

@@ -0,0 +1,16 @@
+package com.ruoyi.framework.shiro.config;
+
+import org.apache.shiro.crypto.hash.Md5Hash;
+
+/**
+ * @Description 默认的密码加密
+ * @Author 安安汐而
+ * @Date 2019/6/4
+ **/
+public class DefaultPasswordEncoder implements RyPasswordEncoder
+{
+    @Override
+    public String encode(String username, String password, String salt) {
+        return new Md5Hash(username + password + salt).toHex().toString();
+    }
+}

ruoyi-framework/src/main/java/com/ruoyi/framework/shiro/config/RyPasswordEncoder.java

@@ -0,0 +1,20 @@
+package com.ruoyi.framework.shiro.config;
+
+
+/**
+ * 密码验证接口
+ * 自己项目里实现这个service、即可覆盖默认的实现
+ *
+ * @author 安安汐而
+ */
+public interface RyPasswordEncoder {
+    /**
+     * 加密密码
+     *
+     * @param username 用户名
+     * @param salt     盐
+     * @param password 原始密码
+     * @return 加密后密码
+     */
+    String encode(String username, String password, String salt);
+}

ruoyi-framework/src/main/java/com/ruoyi/framework/shiro/service/SysPasswordService.java

@@ -2,6 +2,8 @@ package com.ruoyi.framework.shiro.service;
 
 import java.util.concurrent.atomic.AtomicInteger;
 import javax.annotation.PostConstruct;
+
+import com.ruoyi.framework.shiro.config.RyPasswordEncoder;
 import org.apache.shiro.cache.Cache;
 import org.apache.shiro.cache.CacheManager;
 import org.apache.shiro.crypto.hash.Md5Hash;
@@ -26,6 +28,8 @@ public class SysPasswordService
 {
     @Autowired
     private CacheManager cacheManager;
+    @Autowired
+    private RyPasswordEncoder ryPasswordEncoder;
 
     private Cache<String, AtomicInteger> loginRecordCache;
 
@@ -79,7 +83,7 @@ public class SysPasswordService
 
     public String encryptPassword(String username, String password, String salt)
     {
-        return new Md5Hash(username + password + salt).toHex().toString();
+        return ryPasswordEncoder.encode(username, password, salt);
     }
 
 }