fix a spider init problem

2013-07-29 10:59:23 +08:00 · 2013-07-29 10:59:23 +08:00 · 18fefa0c0a
parent 54904851ea
commit 18fefa0c0a
1 changed files with 3 additions and 1 deletions
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/Spider.java
@ -270,7 +270,9 @@ public class Spider implements Runnable, Task {
        if (threadNum <= 0) {
            throw new IllegalArgumentException("threadNum should be more than one!");
        }
-        downloader = new HttpClientDownloader(threadNum);
+        if (downloader==null || downloader instanceof HttpClientDownloader){
+            downloader = new HttpClientDownloader(threadNum);
+        }
        if (threadNum == 1) {
            return this;
        }