feat: 新增终端顶部实时服务器监控面板

backend/src/main/java/com/sshmanager/controller/MonitorController.java

@@ -0,0 +1,139 @@
+package com.sshmanager.controller;
+
+import com.sshmanager.entity.Connection;
+import com.sshmanager.entity.User;
+import com.sshmanager.repository.UserRepository;
+import com.sshmanager.service.ConnectionService;
+import com.sshmanager.service.SshService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/api/monitor")
+public class MonitorController {
+
+    private final ConnectionService connectionService;
+    private final SshService sshService;
+    private final UserRepository userRepository;
+
+    public MonitorController(ConnectionService connectionService, SshService sshService, UserRepository userRepository) {
+        this.connectionService = connectionService;
+        this.sshService = sshService;
+        this.userRepository = userRepository;
+    }
+
+    private Long getCurrentUserId(Authentication auth) {
+        User user = userRepository.findByUsername(auth.getName()).orElseThrow(() -> new IllegalStateException("User not found"));
+        return user.getId();
+    }
+
+    @GetMapping("/{connectionId}")
+    public ResponseEntity<Map<String, Object>> getServerMetrics(@PathVariable Long connectionId, Authentication authentication) {
+        try {
+            Long userId = getCurrentUserId(authentication);
+            Connection conn = connectionService.getConnectionForSsh(connectionId, userId);
+            if (conn == null) {
+                return ResponseEntity.notFound().build();
+            }
+
+            String password = connectionService.getDecryptedPassword(conn);
+            String privateKey = connectionService.getDecryptedPrivateKey(conn);
+            String passphrase = connectionService.getDecryptedPassphrase(conn);
+
+            Map<String, Object> metrics = new HashMap<>();
+
+            // 获取CPU使用率
+            try {
+                String cpuOutput = sshService.executeCommand(conn, password, privateKey, passphrase, 
+                    "top -bn1 | grep 'Cpu(s)' | sed 's/.*, *\\([0-9.]*\\)%* id.*/\\1/' | awk '{print 100 - $1}'");
+                double cpuUsage = Double.parseDouble(cpuOutput.trim());
+                metrics.put("cpuUsage", Math.round(cpuUsage * 10.0) / 10.0);
+            } catch (Exception e) {
+                metrics.put("cpuUsage", null);
+            }
+
+            // 获取内存信息
+            try {
+                String memOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                    "free -b | grep Mem");
+                String[] memParts = memOutput.trim().split("\\s+");
+                long totalMem = Long.parseLong(memParts[1]);
+                long usedMem = Long.parseLong(memParts[2]);
+                double memUsage = (double) usedMem / totalMem * 100;
+                metrics.put("memTotal", totalMem);
+                metrics.put("memUsed", usedMem);
+                metrics.put("memUsage", Math.round(memUsage * 10.0) / 10.0);
+            } catch (Exception e) {
+                metrics.put("memTotal", null);
+                metrics.put("memUsed", null);
+                metrics.put("memUsage", null);
+            }
+
+            // 获取磁盘使用率
+            try {
+                String diskOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                    "df -P / | tail -1");
+                String[] diskParts = diskOutput.trim().split("\\s+");
+                int diskUsage = Integer.parseInt(diskParts[4].replace("%", ""));
+                metrics.put("diskUsage", diskUsage);
+            } catch (Exception e) {
+                metrics.put("diskUsage", null);
+            }
+
+            // 获取系统负载
+            try {
+                String loadOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                    "cat /proc/loadavg");
+                String[] loadParts = loadOutput.trim().split("\\s+");
+                double load1 = Double.parseDouble(loadParts[0]);
+                metrics.put("load1", load1);
+            } catch (Exception e) {
+                metrics.put("load1", null);
+            }
+
+            // 获取CPU核数
+            try {
+                String cpuCountOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                    "grep -c ^processor /proc/cpuinfo");
+                int cpuCores = Integer.parseInt(cpuCountOutput.trim());
+                metrics.put("cpuCores", cpuCores);
+            } catch (Exception e) {
+                metrics.put("cpuCores", null);
+            }
+
+            // 获取系统运行时间
+            try {
+                String uptimeOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                    "uptime -p");
+                metrics.put("uptime", uptimeOutput.trim().replace("up ", ""));
+            } catch (Exception e) {
+                // 尝试另一种uptime格式
+                try {
+                    String uptimeOutput = sshService.executeCommand(conn, password, privateKey, passphrase,
+                        "cat /proc/uptime | awk '{print $1}'");
+                    double uptimeSeconds = Double.parseDouble(uptimeOutput.trim());
+                    long days = (long) (uptimeSeconds / 86400);
+                    long hours = (long) ((uptimeSeconds % 86400) / 3600);
+                    long minutes = (long) ((uptimeSeconds % 3600) / 60);
+                    StringBuilder uptimeStr = new StringBuilder();
+                    if (days > 0) uptimeStr.append(days).append("d ");
+                    if (hours > 0) uptimeStr.append(hours).append("h ");
+                    uptimeStr.append(minutes).append("m");
+                    metrics.put("uptime", uptimeStr.toString().trim());
+                } catch (Exception e2) {
+                    metrics.put("uptime", null);
+                }
+            }
+
+            return ResponseEntity.ok(metrics);
+        } catch (Exception e) {
+            Map<String, Object> error = new HashMap<>();
+            error.put("error", e.getMessage());
+            return ResponseEntity.badRequest().body(error);
+        }
+    }
+}

backend/src/main/java/com/sshmanager/service/SshService.java

@@ -1,22 +1,25 @@
 package com.sshmanager.service;
 
-import com.jcraft.jsch.ChannelShell;
-import com.jcraft.jsch.JSch;
-import com.jcraft.jsch.Session;
-import com.sshmanager.entity.Connection;
-import org.springframework.stereotype.Service;
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.ChannelShell;
+import com.jcraft.jsch.JSch;
+import com.jcraft.jsch.Session;
+import com.sshmanager.entity.Connection;
+import org.springframework.stereotype.Service;
 
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PipedInputStream;
-import java.io.PipedOutputStream;
+import java.io.PipedOutputStream;
 
 @Service
 public class SshService {
 
-    public SshSession createShellSession(Connection conn, String password, String privateKey, String passphrase)
-        throws Exception {
+    public SshSession createShellSession(Connection conn, String password, String privateKey, String passphrase)
+        throws Exception {
         JSch jsch = new JSch();
 
         if (conn.getAuthType() == Connection.AuthType.PRIVATE_KEY && privateKey != null && !privateKey.isEmpty()) {
@@ -65,7 +68,49 @@ public class SshService {
             }
         }).start();
 
-        return new SshSession(session, channel, channelOut, pipeToChannel);
+        return new SshSession(session, channel, channelOut, pipeToChannel);
+    }
+
+    // 执行单次命令并返回输出
+    public String executeCommand(Connection conn, String password, String privateKey, String passphrase, String command) throws Exception {
+        JSch jsch = new JSch();
+
+        if (conn.getAuthType() == Connection.AuthType.PRIVATE_KEY && privateKey != null && !privateKey.isEmpty()) {
+            byte[] keyBytes = privateKey.getBytes(StandardCharsets.UTF_8);
+            byte[] passphraseBytes = (passphrase != null && !passphrase.isEmpty())
+                ? passphrase.getBytes(StandardCharsets.UTF_8) : null;
+            jsch.addIdentity("key", keyBytes, null, passphraseBytes);
+        }
+
+        Session session = jsch.getSession(conn.getUsername(), conn.getHost(), conn.getPort());
+        session.setConfig("StrictHostKeyChecking", "no");
+        session.setConfig("kex", "diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1");
+        session.setConfig("PreferredAuthentications", conn.getAuthType() == Connection.AuthType.PASSWORD ? "password" : "publickey");
+
+        if (conn.getAuthType() == Connection.AuthType.PASSWORD) {
+            session.setPassword(password);
+        }
+
+        session.connect(8000);
+
+        ChannelExec channel = (ChannelExec) session.openChannel("exec");
+        channel.setCommand(command);
+        channel.setErrStream(System.err);
+
+        InputStream in = channel.getInputStream();
+        channel.connect(3000);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8));
+        StringBuilder result = new StringBuilder();
+        String line;
+        while ((line = reader.readLine()) != null) {
+            result.append(line).append("\n");
+        }
+
+        channel.disconnect();
+        session.disconnect();
+
+        return result.toString().trim();
     }
 
     public static class SshSession {

frontend/src/components/TerminalWidget.vue

@@ -1,20 +1,35 @@
-<script setup lang="ts">
-import { nextTick, ref, onMounted, onUnmounted, watch } from 'vue'
-import { Terminal } from 'xterm'
-import { FitAddon } from '@xterm/addon-fit'
-import { useAuthStore } from '../stores/auth'
+<script setup lang="ts">
+import { nextTick, ref, onMounted, onUnmounted, watch } from 'vue'
+import { Terminal } from 'xterm'
+import { FitAddon } from '@xterm/addon-fit'
+import { useAuthStore } from '../stores/auth'
+import axios from 'axios'
+import { Activity, Cpu, HardDrive, MemoryStick, Clock, ChevronUp, ChevronDown } from 'lucide-vue-next'
 import 'xterm/css/xterm.css'
 
 const CONTROL_PREFIX = '__SSHMANAGER__:'
 
-const props = defineProps<{
-  connectionId: number
-  active?: boolean
-}>()
+const props = defineProps<{
+  connectionId: number
+  active?: boolean
+}>()
 
 const containerRef = ref<HTMLElement | null>(null)
 const status = ref<'connecting' | 'connected' | 'error'>('connecting')
 const errorMessage = ref('')
+const showMonitor = ref(true)
+const monitorLoading = ref(false)
+const monitorData = ref<{
+  cpuUsage?: number
+  memTotal?: number
+  memUsed?: number
+  memUsage?: number
+  diskUsage?: number
+  load1?: number
+  cpuCores?: number
+  uptime?: string
+}>({})
+let monitorPollTimer: number | null = null
 
 let term: Terminal | null = null
 let fitAddon: FitAddon | null = null
@@ -34,11 +49,51 @@ function focusTerminal() {
   term?.focus()
 }
 
-function refreshTerminalLayout() {
-  nextTick(() => {
-    fitTerminal()
-    focusTerminal()
-  })
+function refreshTerminalLayout() {
+  nextTick(() => {
+    fitTerminal()
+    focusTerminal()
+  })
+}
+
+function formatBytes(bytes: number): string {
+  if (bytes < 1024) return bytes + ' B'
+  if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
+  if (bytes < 1024 * 1024 * 1024) return (bytes / (1024 * 1024)).toFixed(1) + ' MB'
+  return (bytes / (1024 * 1024 * 1024)).toFixed(1) + ' GB'
+}
+
+function getUsageColor(usage: number | undefined, threshold: number = 70, critical: number = 90): string {
+  if (usage === undefined) return 'text-slate-400'
+  if (usage >= critical) return 'text-red-400'
+  if (usage >= threshold) return 'text-amber-400'
+  return 'text-green-400'
+}
+
+async function fetchMonitorData() {
+  if (!props.active || status.value !== 'connected') return
+  monitorLoading.value = true
+  try {
+    const res = await axios.get(`/api/monitor/${props.connectionId}`)
+    monitorData.value = res.data
+  } catch {
+    // 静默失败，不影响终端使用
+  } finally {
+    monitorLoading.value = false
+  }
+}
+
+function startMonitorPoll() {
+  stopMonitorPoll()
+  fetchMonitorData()
+  monitorPollTimer = window.setInterval(fetchMonitorData, 5000)
+}
+
+function stopMonitorPoll() {
+  if (monitorPollTimer) {
+    clearInterval(monitorPollTimer)
+    monitorPollTimer = null
+  }
 }
 
 function getWsUrl(): string {
@@ -52,32 +107,34 @@ function getWsUrl(): string {
   return `${protocol}//${host}/ws/terminal?connectionId=${props.connectionId}&token=${encodeURIComponent(token)}`
 }
 
-function cleanup() {
-  if (resizeObserver && containerRef.value) {
-    resizeObserver.unobserve(containerRef.value)
-  }
-  resizeObserver = null
-
-  if (onDataDisposable) {
-    onDataDisposable.dispose()
-    onDataDisposable = null
-  }
-  if (onResizeDisposable) {
-    onResizeDisposable.dispose()
-    onResizeDisposable = null
-  }
-  clearTimeout(resizeDebounceTimer)
-  resizeDebounceTimer = 0
-
-  if (ws) {
-    ws.close()
-    ws = null
-  }
-  if (term) {
-    term.dispose()
-    term = null
-  }
-  fitAddon = null
+function cleanup() {
+  stopMonitorPoll()
+  
+  if (resizeObserver && containerRef.value) {
+    resizeObserver.unobserve(containerRef.value)
+  }
+  resizeObserver = null
+
+  if (onDataDisposable) {
+    onDataDisposable.dispose()
+    onDataDisposable = null
+  }
+  if (onResizeDisposable) {
+    onResizeDisposable.dispose()
+    onResizeDisposable = null
+  }
+  clearTimeout(resizeDebounceTimer)
+  resizeDebounceTimer = 0
+
+  if (ws) {
+    ws.close()
+    ws = null
+  }
+  if (term) {
+    term.dispose()
+    term = null
+  }
+  fitAddon = null
 }
 
 function sendResize(cols: number, rows: number) {
@@ -154,10 +211,13 @@ onMounted(() => {
     return
   }
 
-  ws.onopen = () => {
-    status.value = 'connected'
-    refreshTerminalLayout()
-    scheduleResize(term!.cols, term!.rows)
+  ws.onopen = () => {
+    status.value = 'connected'
+    refreshTerminalLayout()
+    scheduleResize(term!.cols, term!.rows)
+    if (props.active !== false) {
+      startMonitorPoll()
+    }
   }
 
   onDataDisposable = term.onData((data) => {
@@ -195,10 +255,15 @@ onMounted(() => {
   }
 })
 
-watch(() => props.active, (active) => {
-  if (active) {
-    refreshTerminalLayout()
-  }
+watch(() => props.active, (active) => {
+  if (active) {
+    refreshTerminalLayout()
+    if (status.value === 'connected') {
+      startMonitorPoll()
+    }
+  } else {
+    stopMonitorPoll()
+  }
 })
 
 onUnmounted(() => {
@@ -208,6 +273,70 @@ onUnmounted(() => {
 
 <template>
   <div class="h-full flex flex-col bg-slate-950 rounded-lg border border-slate-700 overflow-hidden">
+    <!-- 监控状态栏 -->
+    <div v-if="status === 'connected'" class="border-b border-slate-700 bg-slate-900/80">
+      <div class="flex items-center justify-between px-3 py-1.5 text-xs">
+        <div class="flex items-center gap-4">
+          <!-- CPU -->
+          <div class="flex items-center gap-1">
+            <Cpu class="w-3.5 h-3.5 text-slate-400" />
+            <span class="text-slate-400">CPU:</span>
+            <span :class="getUsageColor(monitorData.cpuUsage)">
+              {{ monitorData.cpuUsage !== undefined ? monitorData.cpuUsage + '%' : '--' }}
+            </span>
+          </div>
+          
+          <!-- 内存 -->
+          <div class="flex items-center gap-1">
+            <MemoryStick class="w-3.5 h-3.5 text-slate-400" />
+            <span class="text-slate-400">MEM:</span>
+            <span :class="getUsageColor(monitorData.memUsage)">
+              {{ monitorData.memUsage !== undefined ? monitorData.memUsage + '%' : '--' }}
+            </span>
+            <span v-if="monitorData.memUsed && monitorData.memTotal" class="text-slate-500 ml-1">
+              ({{ formatBytes(monitorData.memUsed) }}/{{ formatBytes(monitorData.memTotal) }})
+            </span>
+          </div>
+          
+          <!-- 磁盘 -->
+          <div class="flex items-center gap-1">
+            <HardDrive class="w-3.5 h-3.5 text-slate-400" />
+            <span class="text-slate-400">DISK:</span>
+            <span :class="getUsageColor(monitorData.diskUsage, 80, 95)">
+              {{ monitorData.diskUsage !== undefined ? monitorData.diskUsage + '%' : '--' }}
+            </span>
+          </div>
+          
+          <!-- 负载 -->
+          <div class="flex items-center gap-1">
+            <Activity class="w-3.5 h-3.5 text-slate-400" />
+            <span class="text-slate-400">LOAD:</span>
+            <span :class="getUsageColor(monitorData.load1, monitorData.cpuCores || 4, (monitorData.cpuCores || 4) * 1.5)">
+              {{ monitorData.load1 !== undefined ? monitorData.load1.toFixed(2) : '--' }}
+            </span>
+          </div>
+          
+          <!-- 运行时间 -->
+          <div class="flex items-center gap-1">
+            <Clock class="w-3.5 h-3.5 text-slate-400" />
+            <span class="text-slate-400">UP:</span>
+            <span class="text-slate-300">
+              {{ monitorData.uptime || '--' }}
+            </span>
+          </div>
+        </div>
+        
+        <!-- 折叠按钮 -->
+        <button 
+          @click="showMonitor = !showMonitor"
+          class="p-1 rounded hover:bg-slate-700 text-slate-400 hover:text-slate-200 transition-colors"
+          :title="showMonitor ? '隐藏监控栏' : '显示监控栏'"
+        >
+          <component :is="showMonitor ? ChevronUp : ChevronDown" class="w-3.5 h-3.5" />
+        </button>
+      </div>
+    </div>
+    
     <div
       ref="containerRef"
       class="flex-1 min-h-0 p-4 xterm-container"