diff --git a/.gitignore b/.gitignore
index 7893291..959d75d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 /wide.exe
 /wide
+/main
 
 /data/workspace/bin/
 /data/workspace/pkg/
diff --git a/output/outputs.go b/output/outputs.go
index f595645..1436d76 100644
--- a/output/outputs.go
+++ b/output/outputs.go
@@ -115,7 +115,7 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 
 		glog.V(3).Infof("Session [%s] is running [id=%d, file=%s]", sid, runningId, filePath)
 
-		// 在读取程序输出前先返回一次，使前端获取到 run 状态以及对应的 pid
+		// 在读取程序输出前先返回一次，使前端获取到 run 状态与 pid
 		if nil != session.OutputWS[sid] {
 			wsChannel := session.OutputWS[sid]
 
@@ -289,7 +289,7 @@ func BuildHandler(w http.ResponseWriter, r *http.Request) {
 
 			if 0 == count { // 说明构建成功，没有错误信息输出
 				// 设置下一次执行命令（前端会根据这个发送请求）
-				channelRet["nextCmd"] = "run"
+				channelRet["nextCmd"] = args["nextCmd"]
 
 				go func() { // 运行 go install，生成的库用于 gocode lib-path
 					cmd := exec.Command("go", "install")
diff --git a/static/js/wide.js b/static/js/wide.js
index b837481..9164301 100644
--- a/static/js/wide.js
+++ b/static/js/wide.js
@@ -442,6 +442,8 @@ var wide = {
         if ($(".menu li.save-all").hasClass("disabled")) {
             return false;
         }
+        
+        // TODO: 只保存未保存过的文件
 
         for (var i = 0, ii = editors.data.length; i < ii; i++) {
             this.fmt(tree.fileTree.getNodeByTId(editors.data[i].id).path, editors.data[i].editor);
@@ -506,10 +508,34 @@ var wide = {
     },
     // 构建.
     build: function () {
-        // TODO: 构建
+        wide.saveAllFiles();
+        
+        var currentPath = editors.getCurrentPath();
+        if (!currentPath) {
+            return false;
+        }
+
+        var request = newWideRequest();
+        request.file = currentPath;
+        request.code = wide.curEditor.getValue();
+        request.nextCmd = ""; // 只构建，无下一步操作
+
+        $.ajax({
+            type: 'POST',
+            url: '/build',
+            data: JSON.stringify(request),
+            dataType: "json",
+            beforeSend: function (data) {
+                $('.bottom-window-group .output').text('');
+            },
+            success: function (data) {
+            }
+        });
     },
     // 构建并运行.
     run: function () {
+        wide.saveAllFiles();
+        
         var currentPath = editors.getCurrentPath();
         if (!currentPath) {
             return false;
@@ -527,6 +553,7 @@ var wide = {
         var request = newWideRequest();
         request.file = currentPath;
         request.code = wide.curEditor.getValue();
+        request.nextCmd = "run";
 
         $.ajax({
             type: 'POST',
@@ -568,6 +595,8 @@ var wide = {
         });
     },
     goinstall: function () {
+        wide.saveAllFiles();
+        
         var currentPath = editors.getCurrentPath();
         if (!currentPath) {
             return false;