java 对http网络请求的基础封装

1、对外接口

package com.hm.service;
import java.util.Map;
import com.hm.web.model.SerializeObject;

/**
 * 数据操作基类实现类
 */
public interface BaseService {
    
    /**
     * 根据ID获取资料
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @return          操作结果
     */
    public SerializeObject find(String sessionID, Map<String, String[]> params);
    
    /**
     * 新增或修改
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @return          操作结果
     */
    public SerializeObject update(String sessionID, Map<String, String[]> params);

    /**
     * 删除
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @return          操作结果
     */
    public SerializeObject delete(String sessionID, Map<String, String[]> params);

    /**
     * 验证法庭是否存在
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @return          是否验证通过
     */
    public SerializeObject verify(String sessionID, Map<String, String[]> params);
    
    /**
     * 查询
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @return          分页数据
     */
    public SerializeObject query(String sessionID, Map<String, String[]> params);
    
    /**
     * 查询返回DataTable
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @param key       根据key获取接口URL地址
     * @return          分页数据
     */
    public SerializeObject queryToDataTable(String sessionID, Map<String, String[]> params, String key);

    /**
     * 查询返回List
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @param key       根据key获取接口URL地址
     * @return          数据
     */
    public SerializeObject queryToList(String sessionID, Map<String, String[]> params, String key);
    
    /**
     * 查询返回String
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @param key       根据key获取接口URL地址
     * @return          分页数据
     */
    public SerializeObject queryToString(String sessionID, Map<String, String[]> params, String key);
    
    /**
     * 查询返回Object
     * @param sessionID 登录成功后分配的Key
     * @param params    参数集合
     * @param key       根据key获取接口URL地址
     * @return          分页数据
     */
    public SerializeObject queryToObject(String sessionID, Map<String, String[]> params, String key);
    
    /**
     * 查询放回Object
     * @param sessionID
     * @param params
     * @param beanClass 定义类型
     * @return
     */
    public SerializeObject queryObject(String sessionID, Map<String, String[]> params, String key,Class<?> beanClass);
    
    /**
     * 查询放回Object
     * @param sessionID
     * @param params
     * @param beanClass 定义类型
     * @return
     */
    public SerializeObject queryToDataTableObject(String sessionID, Map<String, String[]> params, String key, Class<?> beanClass);
}

2、基础实现

package com.hm.service.impl;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

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

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import com.hm.common.util.UF;
import com.hm.data.ResultType;
import com.hm.service.BaseService;
import com.hm.service.bean.DataTable;
import com.hm.service.bean.HousesBean;
import com.hm.service.bean.Page;
import com.hm.web.cache.ServiceUriCache;
import com.hm.web.config.WebConfig;
import com.hm.web.model.SerializeObject;

/**
 * 数据操作基类实现类
 */
public class BaseServiceImpl implements BaseService{

    private static Log log;
    private String entityName = "";
    private Class<?> entityClass;
    
    ServiceUriCache serviceUriCache = ServiceUriCache.getInstance();
    
    /**
     * 返回格式：{"status":500,"data":"message"}
     * @param jsonText  JSON字符串
     * @return          操作结果
     */
    public SerializeObject parseSerializeObject(String jsonText) {
        if(StringUtils.isBlank(jsonText)) {
            return null;
        }
        
        int status = ResultType.ERROR;
        String data = "";
        try{
            JSONObject obj = JSONObject.fromObject(jsonText);
            if(null != obj) {
                status = UF.toInt(obj.get("status").toString());
                data = UF.toString(obj.get("data").toString());
            }
        } catch (Exception e) {
            getLog().error(e.getMessage());
            return null;
        }
        return new SerializeObject(status, data);
    }
    
    /**
     * 根据Class<?> beanClass，返回执行结果。<br/>
     * 返回格式：{"status":500,"data":Class}
     * @param jsonText  JSON字符串
     * @param beanClass 实例类
     * @return          操作结果
     */
    public SerializeObject parseSerializeObjectByClass(String jsonText, Class<?> beanClass) {
        if(StringUtils.isBlank(jsonText)) {
            return null;
        }
        
        try{
            JSONObject obj = JSONObject.fromObject(jsonText);
            int status = UF.toInt(obj.get("status").toString());
            String data = UF.toString(obj.get("data").toString());
            if(status != ResultType.NORMAL || StringUtils.isBlank(data)) {
                return parseSerializeObject(jsonText);
            }
            return new SerializeObject(status, JSONObject.toBean(JSONObject.fromObject(data), beanClass));
        } catch (Exception e) {
            getLog().error(e.getMessage());
            return null;
        }
    }
    
    /**
     * 获取Post提交返回的内容
     * @param uri       网址
     * @param timeout   超时
     * @return          网页内容
     */
    protected String getContentByPost(String uri, int timeout, Map<String, String[]> params, String sessionID) {
        String content = "";
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {
            HttpPost httpPost = new HttpPost(uri);
            log.info(uri);

            List<NameValuePair> nvps = new ArrayList <NameValuePair>();

            // 添加sessionID
            nvps.add(new BasicNameValuePair("sessionID", sessionID));

            Set<String> keySet = params.keySet();
            for(String key : keySet) {
                String[] vals = params.get(key);
                if(null == vals) continue;
                
                for(String v : vals) {
                    nvps.add(new BasicNameValuePair(key, v));
                }
            }  
            httpPost.setEntity(new UrlEncodedFormEntity(nvps, UF.getDefaultCharset()));
            
            CloseableHttpResponse response = httpclient.execute(httpPost);
            try {
                HttpEntity httpEntity = response.getEntity();  
                if (httpEntity != null) {
                    content = EntityUtils.toString(httpEntity);
                    log.debug(content);
                }
                EntityUtils.consume(httpEntity);
            } finally {
                response.close();
            }
        }catch(Exception e){
            log.error(e.getMessage());
        } finally {
            try {
                httpclient.close();
            } catch (IOException e) {
                log.error(e.getMessage());
            }
        }
        return content;
    }
    
    /**
     * 获取参数
     * @param sessionID 登录成功后分配的Key
     * @return
     */
    public Map<String, String> getParams(String sessionID) {
        Map<String, String> params = new HashMap<String, String>();
        if(StringUtils.isNotBlank(sessionID)) {
            params.put("sessionID", sessionID);
        }
        return params;
    }
    

    /**
     * 构造方法
     */
    public BaseServiceImpl(Class<?> entityClass) {
        log = LogFactory.getLog(entityClass.getClass());
        this.entityClass = entityClass;
    }
    
    /**
     * 构造方法
     */
    public BaseServiceImpl(Class<?> subClass, Class<?> entityClass, String entityName) {
        log = LogFactory.getLog(subClass.getClass());
        this.entityClass = entityClass;
        this.entityName = entityName;
    }

    /**
     * @return the log
     */
    public final Log getLog() {
        if(null == log) {
            log = LogFactory.getLog(this.getClass());
        }
        return log;
    }
    
    @Override
    public SerializeObject find(String sessionID, Map<String, String[]> params) {
        return queryToObject(sessionID, params, entityName + ".find");
    }

    @Override
    public SerializeObject update(String sessionID, Map<String, String[]> params) {
        return queryToString(sessionID, params, entityName + ".update");
    }

    @Override
    public SerializeObject delete(String sessionID, Map<String, String[]> params) {
        return queryToString(sessionID, params, entityName + ".delete");
    }

    @Override
    public SerializeObject verify(String sessionID, Map<String, String[]> params) {
        return queryToString(sessionID, params, entityName + ".verify");
    }
    
    @Override
    public SerializeObject query(String sessionID, Map<String, String[]> params) {
        return queryToDataTable(sessionID, params, entityName + ".query");
    }

    @Override
    public SerializeObject queryToDataTable(String sessionID, Map<String, String[]> params, String key) {
        String uri = serviceUriCache.getUri(key);
        String jsonText = getContentByPost(uri, WebConfig.TIMEOUT, params, sessionID);
        
        DataTable<Object> dataTable = new DataTable<Object>();
        int status = ResultType.ERROR;
        try{
            JSONObject obj = JSONObject.fromObject(jsonText);
            status = UF.toInt(obj.get("status").toString());
            String data = UF.toString(obj.get("data").toString());
            if(status != ResultType.NORMAL) {
                return new SerializeObject(status, data);
            }
    
            obj = JSONObject.fromObject(data);
            // 分页
            String pageString = UF.toString(obj.get("page").toString());
            if(StringUtils.isNotBlank(pageString)) {
                dataTable.setPage((Page)JSONObject.toBean(JSONObject.fromObject(pageString), Page.class));
            }
            
            // 记录集
            String dataListString = UF.toString(obj.get("dataList").toString());
            if(StringUtils.isNotBlank(pageString)) {
                JSONArray jsonArray = JSONArray.fromObject(dataListString);
                dataTable.getDataList().addAll(JSONArray.toList(jsonArray, entityClass.newInstance(), new JsonConfig()));
            }
        } catch (Exception e) {
            getLog().error(e.getMessage());
            return null;
        }
        return new SerializeObject(status, dataTable);
    }
    
    public SerializeObject queryObject(String sessionID, Map<String, String[]> params,String key, Class<?> beanClass) {
        return queryToDataTableObject(sessionID, params, key, beanClass);
    }

    public SerializeObject queryToDataTableObject(String sessionID, Map<String, String[]> params, String key, Class<?> beanClass) {
        String uri = serviceUriCache.getUri(key);
        String jsonText = getContentByPost(uri, WebConfig.TIMEOUT, params, sessionID);
        
        DataTable<Object> dataTable = new DataTable<Object>();
        int status = ResultType.ERROR;
        try{
            JSONObject obj = JSONObject.fromObject(jsonText);
            status = UF.toInt(obj.get("status").toString());
            String data = UF.toString(obj.get("data").toString());
            if(status != ResultType.NORMAL) {
                return new SerializeObject(status, data);
            }
    
            obj = JSONObject.fromObject(data);
            // 分页
            String pageString = UF.toString(obj.get("page").toString());
            if(StringUtils.isNotBlank(pageString)) {
                dataTable.setPage((Page)JSONObject.toBean(JSONObject.fromObject(pageString), Page.class));
            }
            
            // 记录集
            String dataListString = UF.toString(obj.get("dataList").toString());
            if(StringUtils.isNotBlank(pageString)) {
                JSONArray jsonArray = JSONArray.fromObject(dataListString);
                dataTable.getDataList().addAll(JSONArray.toList(jsonArray, beanClass.newInstance(), new JsonConfig()));
            }
        } catch (Exception e) {
            getLog().error(e.getMessage());
            e.printStackTrace();
            return null;
        }
        return new SerializeObject(status, dataTable);
    }

    @Override
    public SerializeObject queryToString(String sessionID, Map<String, String[]> params, String key) {
        String uri = serviceUriCache.getUri(key);
        String jsonText = getContentByPost(uri, WebConfig.TIMEOUT, params, sessionID);
        return parseSerializeObject(jsonText);
    }

    @Override
    public SerializeObject queryToObject(String sessionID, Map<String, String[]> params, String key) {
        String uri = serviceUriCache.getUri(key);
        String jsonText = getContentByPost(uri, WebConfig.TIMEOUT, params, sessionID);
        return parseSerializeObjectByClass(jsonText, entityClass);
    }
    
    @Override
    public SerializeObject queryToList(String sessionID, Map<String, String[]> params, String key) {
        String uri = serviceUriCache.getUri(key);
        String jsonText = getContentByPost(uri, WebConfig.TIMEOUT, params, sessionID);
        
        try{
            JSONObject obj = JSONObject.fromObject(jsonText);
            int status = UF.toInt(obj.get("status").toString());
            String data = UF.toString(obj.get("data").toString());
            if(status != ResultType.NORMAL || StringUtils.isBlank(data)) {
                return parseSerializeObject(jsonText);
            }
            
            JSONArray jsonArray = JSONArray.fromObject(data);
            List dataList = JSONArray.toList(jsonArray, entityClass.newInstance(), new JsonConfig());
            return new SerializeObject(status, dataList);
        } catch (Exception e) {
            getLog().error(e.getMessage());
            return null;
        }
    }
}
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