fix ZipCodePageProcessor

webmagic-core/src/main/java/us/codecraft/webmagic/selector/PlainText.java

@@ -109,7 +109,7 @@ public class PlainText implements Selectable {
     }
 
     @Override
-    public String toString() {
+    public String get() {
         if (CollectionUtils.isNotEmpty(all())) {
             return all().get(0);
         } else {
@@ -117,6 +117,11 @@ public class PlainText implements Selectable {
         }
     }
 
+    @Override
+    public String toString() {
+        return get();
+    }
+
     @Override
     public boolean match() {
         return strings != null && strings.size() > 0;

webmagic-core/src/main/java/us/codecraft/webmagic/selector/Selectable.java

@@ -99,6 +99,13 @@ public interface Selectable {
      */
     public String toString();
 
+    /**
+     * single string result
+     *
+     * @return single string result
+     */
+    public String get();
+
     /**
      * if result exist for select
      *

webmagic-samples/src/main/java/us/codecraft/webmagic/samples/scheduler/ZipCodePageProcessor.java

@@ -9,8 +9,9 @@ import us.codecraft.webmagic.processor.PageProcessor;
 import us.codecraft.webmagic.scheduler.PriorityScheduler;
 
 import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
-import static us.codecraft.webmagic.selector.Selectors.regex;
 import static us.codecraft.webmagic.selector.Selectors.xpath;
 
 /**
@@ -19,16 +20,16 @@ import static us.codecraft.webmagic.selector.Selectors.xpath;
 public class ZipCodePageProcessor implements PageProcessor {
 
     private Site site = Site.me().setCharset("gb2312")
-            .setSleepTime(100).addStartUrl("http://www.ip138.com/post/");
+            .setSleepTime(100);
 
     @Override
     public void process(Page page) {
         if (page.getUrl().toString().equals("http://www.ip138.com/post/")) {
             processCountry(page);
-        } else if (page.getUrl().regex("http://www\\.ip138\\.com/post/\\w+[/]?$").toString() != null) {
-            processProvince(page);
-        } else {
+        } else if (page.getUrl().regex("http://www\\.ip138\\.com/\\d{6}[/]?$").toString() != null) {
             processDistrict(page);
+        } else {
+            processProvince(page);
         }
 
     }
@@ -45,28 +46,26 @@ public class ZipCodePageProcessor implements PageProcessor {
 
     private void processProvince(Page page) {
         //这里仅靠xpath没法精准定位，所以使用正则作为筛选，不符合正则的会被过滤掉
-        List<String> districts = page.getHtml().xpath("//body/table/tbody/tr/td").regex(".*http://www\\.ip138\\.com/post/\\w+/\\w+.*").all();
+        List<String> districts = page.getHtml().xpath("//body/table/tbody/tr[@bgcolor=\"#ffffff\"]").all();
+        Pattern pattern = Pattern.compile("<td>([^<>]+)</td>.*?href=\"(.*?)\"",Pattern.DOTALL);
         for (String district : districts) {
-            String link = xpath("//@href").select(district);
-            String title = xpath("/text()").select(district);
-            Request request = new Request(link).setPriority(1).putExtra("province", page.getRequest().getExtra("province")).putExtra("district", title);
-            page.addTargetRequest(request);
+            Matcher matcher = pattern.matcher(district);
+            while (matcher.find()) {
+                String title = matcher.group(1);
+                String link = matcher.group(2);
+                Request request = new Request(link).setPriority(1).putExtra("province", page.getRequest().getExtra("province")).putExtra("district", title);
+                page.addTargetRequest(request);
+            }
         }
     }
 
     private void processDistrict(Page page) {
         String province = page.getRequest().getExtra("province").toString();
         String district = page.getRequest().getExtra("district").toString();
-        List<String> counties = page.getHtml().xpath("//body/table/tbody/tr").regex(".*<td>\\d+</td>.*").all();
-        String regex = "<td[^<>]*>([^<>]+)</td><td[^<>]*>([^<>]+)</td><td[^<>]*>([^<>]+)</td><td[^<>]*>([^<>]+)</td>";
-        for (String county : counties) {
-            String county0 = regex(regex, 1).select(county);
-            String county1 = regex(regex, 2).select(county);
-            String zipCode = regex(regex, 3).select(county);
-            page.putField("result", StringUtils.join(new String[]{province, district,
-                    county0, county1, zipCode}, "\t"));
-        }
-        List<String> links = page.getHtml().links().regex("http://www\\.ip138\\.com/post/\\w+/\\w+").all();
+        String zipCode = page.getHtml().regex("<h2>邮编：(\\d+)</h2>").toString();
+        page.putField("result", StringUtils.join(new String[]{province, district,
+                zipCode}, "\t"));
+        List<String> links = page.getHtml().links().regex("http://www\\.ip138\\.com/\\d{6}[/]?$").all();
         for (String link : links) {
             page.addTargetRequest(new Request(link).setPriority(2).putExtra("province", province).putExtra("district", district));
         }
@@ -79,11 +78,8 @@ public class ZipCodePageProcessor implements PageProcessor {
     }
 
     public static void main(String[] args) {
-        Spider.create(new ZipCodePageProcessor()).scheduler(new PriorityScheduler()).run();
+        Spider spider = Spider.create(new ZipCodePageProcessor()).scheduler(new PriorityScheduler()).addUrl("http://www.ip138.com/post/");
 
-        PriorityScheduler scheduler = new PriorityScheduler();
-        Spider spider = Spider.create(new ZipCodePageProcessor()).scheduler(scheduler);
-        scheduler.push(new Request("http://www.baidu.com/s?wd=webmagic&f=12&rsp=0&oq=webmagix&tn=baiduhome_pg&ie=utf-8"),spider);
         spider.run();
     }
 }