Adroid与SSH框架服务器通信方式 - 黑马程序员技术交流社区

可以通过HttpClient，然后用HtmlParser去解析想要的内容。其中getCommentData(String url)，url为想要抓取的页面地址。

注意：往往获取网页内容时，格式为UTF-8，直接拿数据时，往往会是“ <”格式，这时候需要通过StringEscapeUtils.unescapeHtml()处理。

package support;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import logic.MainService;
import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.commons.lang.StringEscapeUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.Parser;
import org.htmlparser.filters.AndFilter;
import org.htmlparser.filters.HasAttributeFilter;
import org.htmlparser.filters.TagNameFilter;
import org.htmlparser.util.NodeList;
import org.htmlparser.util.ParserException;
import org.htmlparser.util.SimpleNodeIterator;
public class CommentData {
private List<Map<String, String>> placedatalist ;
public List<Map<String, String>> getPlacedatalist() {
return placedatalist;
}
public void setPlacedatalist(List<Map<String, String>> placedatalist) {
this.placedatalist = placedatalist;
}
private String getNoAHref(String source){
return source.substring(source.indexOf("\"", source.indexOf("href"))+1, source.lastIndexOf("\""));
}
private String getAImageSrc(String source){
return source.substring(source.indexOf("\"", source.indexOf("src"))+1, source.lastIndexOf("\""));
}
public List<Map<String, String>> getCommentData(String url) throws ParserException{
placedatalist= new ArrayList<Map<String, String>>();
HttpGet get=new HttpGet(url);
try{
HttpResponse httpReponse=MainService.guiji.getHttpClient().execute(get);
HttpEntity entity=httpReponse.getEntity();
BufferedReader br = new BufferedReader(new InputStreamReader(entity.getContent(),"utf-8"));
String line = null;
String webcontent="";
while ((line = br.readLine()) != null)
{
webcontent+=line;
}
br.close();
Parser parser=new Parser(webcontent);
NodeFilter filter1 = new TagNameFilter("table");
NodeFilter filter2 = new HasAttributeFilter("id","idcomment");
NodeFilter filter = new AndFilter(filter1,filter2);
NodeList nodes = parser.extractAllNodesThatMatch(filter);
SimpleNodeIterator iterator = nodes.elements();
while (iterator.hasMoreNodes()) {
Map<String, String> datamap = new HashMap<String, String>();
datamap.put("userlogo", null);
datamap.put("userlink", null);
datamap.put("idmsgcontent", null);
datamap.put("idmsgpic", null);
datamap.put("idtime", null);
datamap.put("idplace", null);
datamap.put("iddeleteReply", null);
datamap.put("idreply", null);
Node node = iterator.nextNode();
Parser parser01=new Parser(node.toHtml());
NodeList chilenodes2 = parser01.extractAllNodesThatMatch(new TagNameFilter("a"));
Node tempnode=null;
for(int i=0;i<chilenodes2.size();i++){
tempnode=chilenodes2.elementAt(i);
if(tempnode.getText().contains("iduserlogo")){
datamap.put("userlogo", getAImageSrc(tempnode.toHtml()));
datamap.put("userlink", getNoAHref(tempnode.getText()));
continue;
}
if(tempnode.getText().contains("idmsgcontent")){
datamap.put("idmsgcontent", StringEscapeUtils.unescapeHtml(tempnode.toPlainTextString()));
continue;
}
if(tempnode.getText().contains("idmsgpic")){
datamap.put("idmsgpic", getAImageSrc(tempnode.toHtml()));
continue;
}
if(tempnode.getText().contains("idtime")){
datamap.put("idtime", StringEscapeUtils.unescapeHtml(tempnode.toPlainTextString()));
continue;
}
if(tempnode.getText().contains("idplace")){
datamap.put("idplace", StringEscapeUtils.unescapeHtml(tempnode.toPlainTextString()));
continue;
}
if(tempnode.getText().contains("iddeleteReply")){
datamap.put("iddeleteReply", getNoAHref(tempnode.getText()));
continue;
}
if(tempnode.getText().contains("iddeleteReply")){
datamap.put("iddeleteReply", getNoAHref(tempnode.getText()));
continue;
}
if(tempnode.getText().contains("idreply")){
datamap.put("idreply", getNoAHref(tempnode.getText()));
continue;
}
}
placedatalist.add(datamap);
}
}
catch (HttpException e)
{
e.printStackTrace();
}
catch (IOException e)
{
} finally {
}
return placedatalist;
}
}

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通过使用将数据存入MultipartEntity中，这种方式可以上传文件、字符串；在提交包含中文的字符串时，需要在addPart后面加入Charset.forName(HTTP.UTF_8)，这样不会导致服务器接收乱码。

HttpPost post=new HttpPost(SystemConstant.baseURL+"actionname"); 其中SystemConstant.baseURL为网站的域名，类似http://172.22.192.37:8888/XXX/，actionname为提交数据到指定的Action名称。

当然JSESSIONID为SSH框架服务器cookie名称，根据不同框架修改这个名称。

public boolean publishMood(Map<String,String> data){
HttpClient httpClient=new DefaultHttpClient();
HttpPost post=new HttpPost(SystemConstant.baseURL+"publishMood");
//如果有数据的话就直接发过去，没有的就不用发了，服务器那边自动会生成数据
try{
MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE,null,Charset.forName(HTTP.UTF_8));
if(data.get("avator")!=null){
compressImage((String) data.get("avator"));
File file=new File((String) data.get("avator"));
multipartEntity.addPart("moodPic",new FileBody(file));
}
multipartEntity.addPart("messageInfo.msg_content",new StringBody(data.get("msgcontent"),Charset.forName(HTTP.UTF_8)));
if(data.get("moodvalue")!=null)
multipartEntity.addPart("mood",new StringBody( data.get("moodvalue")));
multipartEntity.addPart("messageInfo.coordinate",new StringBody(MainService.guiji.getCoordinate()));
post.getParams().setParameter("http.protocol.cookie-policy",CookiePolicy.BROWSER_COMPATIBILITY);
post.setEntity(multipartEntity);
if(JSESSIONID!=null){
post.setHeader("Cookie","JSESSIONID=" + JSESSIONID);
}
HttpResponse response=httpClient.execute(post);
if(response.getStatusLine().getStatusCode()==HttpStatus.SC_OK){
CookieStore mCookieStore = ((AbstractHttpClient) httpClient).getCookieStore();
List<Cookie> cookies = mCookieStore.getCookies();
for (int i = 0; i < cookies.size();i++)
{
if ("JSESSIONID".equals(cookies.get(i).getName())) {
JSESSIONID = cookies.get(i).getValue();
break;
}
}
return true;
}
}catch (Exception e) {
}
return false;
}

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