查询rabbitmq

package com.yunda.app.service;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.yunda.app.entity.vo.MessageQueue;
import com.yunda.app.entity.vo.Page;
import com.yunda.app.util.StaticVar;

@Service(value = "messageQueueService")
@Transactional
public class MessageQueueServiceImpl implements MessageQueueService {
    private Scanner scanner;

    @Override
    public Page pageQuery(MessageQueue messageQueue) {
        Page page = new Page();
        try {
            StringBuilder ipText = new StringBuilder();
            String url = StaticVar.RABBITMQ_URL;
            // 用户名密码部分
            String username = StaticVar.RABBITMQ_USERNAME;
            String password = StaticVar.RABBITMQ_PASSWORD;
            String input = username + ":" + password;
            String encoding = new String((new sun.misc.BASE64Encoder()).encode(input.getBytes()));
            URL myURL = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) myURL.openConnection();
            conn.setConnectTimeout(6 * 1000);
            conn.setReadTimeout(6 * 1000);
            conn.setRequestProperty("Authorization", "Basic " + encoding);
            //如果连接成功，获得返回字符串
            if (conn.getResponseCode() == 200) {
                InputStream inputStream = conn.getInputStream();
                scanner = new Scanner(inputStream, "utf-8");
                while (scanner.hasNext()) {
                    ipText.append(scanner.next());
                }
                if (inputStream != null) {
                    inputStream.close();
                }
                conn.disconnect();
                JSONArray jsonArray = JSONArray.fromObject(ipText.toString());
                List<MessageQueue> mqList = new ArrayList<MessageQueue>();
                int pageNo = messageQueue.getPageNo();
                int pageSize = messageQueue.getPageSize();
                //如果json有子项，说明有消息队列
                if (jsonArray != null && jsonArray.size() > 0) {
                    String messageQueueName = messageQueue.getName();
                    //不是搜索某个消息队列
                    if (messageQueueName == null) {
                        //分页选取消息队列
                        for (int i = (pageNo - 1) * pageSize; i < pageNo
                                * pageSize; i++) {
                            if (i == jsonArray.size()) {
                                break;
                            }
                            MessageQueue mq = new MessageQueue();
                            JSONObject jsonobject = jsonArray.getJSONObject(i);
                            //获取消息队列name等字段
                            mq.setName(jsonobject.getString("name"));
                            mq.setMessagesReady(jsonobject
                                    .getInt("messages_ready"));
                            mq.setMessagesUnacknowledged(jsonobject
                                    .getInt("messages_unacknowledged"));
                            mq.setMessages(jsonobject.getInt("messages"));
                            mq.setConsumers(jsonobject.getInt("consumers"));
                            mq.setState(jsonobject.getString("state"));
                            mqList.add(mq);
                        }
                        if (mqList.size() > 0) {
                            page.setTotal(jsonArray.size());
                            page.setRows(mqList);
                        }
                    } else {//是搜索某个消息队列
                        MessageQueue mq = new MessageQueue();
                        for (int i = 0; i < jsonArray.size(); i++) {
                            JSONObject jsonobject = jsonArray.getJSONObject(i);
                            //获取消息队列name字段,判断是否和搜索队列名称相同
                            String jsonobjectName=jsonobject.getString("name");
                            if (jsonobjectName.equals(messageQueueName)) {
                                mq.setName(messageQueueName);
                                mq.setMessagesReady(jsonobject
                                        .getInt("messages_ready"));
                                mq.setMessagesUnacknowledged(jsonobject
                                        .getInt("messages_unacknowledged"));
                                mq.setMessages(jsonobject.getInt("messages"));
                                mq.setConsumers(jsonobject.getInt("consumers"));
                                mq.setState(jsonobject.getString("state"));
                                mqList.add(mq);
                                break;
                            } 
                        }
                        if (mqList.size() > 0) {
                            page.setTotal(1);
                            page.setRows(mqList);
                        }
                    }

                }

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return page;
    }
}

package com.yunda.app.entity.vo;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
 * 分页信息实体
 *
 * @author JS
 * @since  2013-04-09
 */
@SuppressWarnings("serial")
public class Page implements Serializable {

    /**总记录数*/
    private long total;
    /**当前页记录,类型为List*/
    private Object rows;
    /**列表底部显示的数据，例如统计数据，类型为List*/
    private Object footer;

    /**
     * 构造方法，只构造空页.
     */
    public Page() {
        this(0, new ArrayList());
    }

    /**
     * 不分页列表数据对象默认构造方法
     * 
     * @param rows    列表数据
     */
    public Page(Object rows) {
        this.rows = rows;
        if(null != rows && rows instanceof List) {
            this.total = ((List)rows).size();
        } else if (null != rows){
            this.total = 1;
        }
    }
    
    /**
     * 分页列表数据对象默认构造方法（仅含含列表）
     * 
     * @param rows    列表数据
     */
    public Page(long total, Object rows) {
        this.total = total;
        this.rows = rows;
    }
    
    /**
     * 默认分页构造方法(含列表和表底)
     *
     * @param total     总记录数
     * @param rows 页数据
     * @param footer    页脚数据
     */
    public Page(long total, Object rows, Object footer) {
        this.total = total;
        this.rows = rows;
        this.footer = footer;
    }

    /**
     * 取当前页中的记录.
     */
    public Object getRows() {
        return rows;
    }
    
    /**
     * 设置当前页中的记录.
     */
    public void setRows(Object rows){
        this.rows = rows;
    }
    
    /**
     * 获取总记录数
     * 
     * @return    
     */
    public long getTotal() {
        return total;
    }

    /**
     * 设置总记录数
     * 
     * @param total
     */
    public void setTotal(long total) {
        this.total = total;
    }
    
    public Object getFooter() {
        return footer;
    }

    public void setFooter(Object footer) {
        this.footer = footer;
    }
    
    /**
     * 获取任一页第一条数据在数据集的位置（不考虑总记录数）
     *
     * @param pageNo   从1开始的页号
     * @param pageSize 每页记录条数
     * @return 该页第一条数据
     */
    public static long getStartOfPage(int pageNo, int pageSize) {
        long start = (pageNo - 1) * pageSize;
        return start < 0 ? 0 : start;
    }
    
    /**
     * 获取任一页第一条数据在数据集的位置(考虑总记录数并做调整)
     *
     * @param total   总记录数
     * @param pageNo   从1开始的页号
     * @param pageSize 每页记录条数
     * @return 该页第一条数据
     */
    public static long getStartOfPage(long total, int pageNo, int pageSize) {
        long start = (pageNo - 1) * pageSize;
        //如果超过了最后一行，则自动退回到最后一页的第一行
        if (start >= total) {
            start = Page.getStartOfPage(pageNo-1, pageSize);
        }
        return start < 0 ? 0 : start;
    }
}