✨ 增加系统监控及日志下载功能

src/main/java/im/zhaojun/common/model/Jvm.java

@@ -0,0 +1,39 @@
+package im.zhaojun.common.model;
+
+import lombok.Data;
+
+/**
+ * @author zhaojun
+ */
+@Data
+public class Jvm {
+
+    /**
+     * 当前 JVM 占用的内存总数 (M)
+     */
+    private double total;
+
+    /**
+     * JVM 最大可用内存总数 (M)
+     */
+    private double max;
+
+    /**
+     * JVM 空闲内存 (M)
+     */
+    private double free;
+
+    /**
+     * JDK 版本
+     */
+    private String version;
+
+    public Jvm() {
+        Runtime runtime = Runtime.getRuntime();
+        this.total = runtime.totalMemory();
+        this.free = runtime.freeMemory();
+        this.max = runtime.maxMemory();
+        this.version = System.getProperty("java.version");
+    }
+
+}