feat: 添加新模块的基础类和主应用类

添加了多个基础服务类和视图模型类，包括SysConfViewModel、CompanyConstant等
实现了客户端和服务端的主应用类，包含启动配置和默认连接参数

server/src/main/java/com/ecep/contract/ServerV2.java

@@ -0,0 +1,49 @@
+package com.ecep.contract;
+
+import java.time.Duration;
+import java.time.Instant;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.metrics.buffering.BufferingApplicationStartup;
+
+/**
+ * Created by Administrator on 2017/4/16.
+ */
+public class AppV2 {
+    private static final Logger logger = LoggerFactory.getLogger(AppV2.class);
+
+    public static void main(String[] args) {
+        // 添加JVM参数以解决Java代理动态加载警告
+        // 这些警告来自360安全卫士的Java代理(com.baize.aegis.plugin.dependency.DependencyExtension)
+        // 1. 启用代理使用跟踪
+        System.setProperty("jdk.instrument.traceUsage", "true");
+        // 2. 明确允许动态加载Java代理
+        System.setProperty("jdk.instrument.allowNativeAccess", "true");
+        // 3. 设置允许动态加载代理
+        System.setProperty("jdk.enableDynamicAgentLoading", "true");
+        
+        SpringApp.application = new SpringApplication(SpringApp.class);
+
+        BufferingApplicationStartup startup = new BufferingApplicationStartup(2000);
+        SpringApp.application.setApplicationStartup(startup);
+        if (logger.isDebugEnabled()) {
+            logger.debug("应用程序启动参数:{}", (Object[]) args);
+        }
+
+        startup.start("");
+        SpringApp.context = SpringApp.application.run(args);
+
+        Duration between = Duration.between(startup.getBufferedTimeline().getStartTime(), Instant.now());
+        if (logger.isDebugEnabled()) {
+            logger.debug("application.run() cost:{}", between);
+        }
+    }
+
+    public static final String DEFAULT_DB_HOST = "10.84.209.154"; // "db-server1.ecctrl.com"
+    public static final String DEFAULT_DB_PORT = "3306";
+    public static final String DEFAULT_DB_USERNAME = "supplier_ms";
+    public static final String DEFAULT_DB_PASSWORD = "[TPdseO!JKMmlrpf";
+    public static final String DEFAULT_DB_DATABASE = "supplier_ms";
+}