整理收集的一些常用java工具类 - Go语言中文社区

整理收集的一些常用java工具类

1.json转换工具

package com.taotao.utils;

import java.util.List;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * json转换工具类
 */
public class JsonUtils {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    /**
     * 将对象转换成json字符串。
     * <p>Title: pojoToJson</p>
     * <p>Description: </p>
     * @param data
     * @return
     */
    public static String objectToJson(Object data) {
    	try {
			String string = MAPPER.writeValueAsString(data);
			return string;
		} catch (JsonProcessingException e) {
			e.printStackTrace();
		}
    	return null;
    }
    
    /**
     * 将json结果集转化为对象
     * 
     * @param jsonData json数据
     * @param clazz 对象中的object类型
     * @return
     */
    public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
        try {
            T t = MAPPER.readValue(jsonData, beanType);
            return t;
        } catch (Exception e) {
        	e.printStackTrace();
        }
        return null;
    }
    
    /**
     * 将json数据转换成pojo对象list
     * <p>Title: jsonToList</p>
     * <p>Description: </p>
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {
    	JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
    	try {
    		List<T> list = MAPPER.readValue(jsonData, javaType);
    		return list;
		} catch (Exception e) {
			e.printStackTrace();
		}
    	
    	return null;
    }
    
}

2.cookie的读写

package com.taotao.common.utils;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * 
 * Cookie 工具类
 *
 */
public final class CookieUtils {

    /**
     * 得到Cookie的值, 不编码
     * 
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName) {
        return getCookieValue(request, cookieName, false);
    }

    /**
     * 得到Cookie的值,
     * 
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    if (isDecoder) {
                        retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
                    } else {
                        retValue = cookieList[i].getValue();
                    }
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return retValue;
    }

    /**
     * 得到Cookie的值,
     * 
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
        	 e.printStackTrace();
        }
        return retValue;
    }

    /**
     * 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue) {
        setCookie(request, response, cookieName, cookieValue, -1);
    }

    /**
     * 设置Cookie的值 在指定时间内生效,但不编码
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage) {
        setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
    }

    /**
     * 设置Cookie的值 不设置生效时间,但编码
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, boolean isEncode) {
        setCookie(request, response, cookieName, cookieValue, -1, isEncode);
    }

    /**
     * 设置Cookie的值 在指定时间内生效, 编码参数
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage, boolean isEncode) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
    }

    /**
     * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage, String encodeString) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
    }

    /**
     * 删除Cookie带cookie域名
     */
    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName) {
        doSetCookie(request, response, cookieName, "", -1, false);
    }

    /**
     * 设置Cookie的值，并使其在指定时间内生效
     * 
     * @param cookieMaxage cookie生效的最大秒数
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else if (isEncode) {
                cookieValue = URLEncoder.encode(cookieValue, "utf-8");
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
            	String domainName = getDomainName(request);
            	System.out.println(domainName);
                if (!"localhost".equals(domainName)) {
                	cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
        	 e.printStackTrace();
        }
    }

    /**
     * 设置Cookie的值，并使其在指定时间内生效
     * 
     * @param cookieMaxage cookie生效的最大秒数
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else {
                cookieValue = URLEncoder.encode(cookieValue, encodeString);
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
            	String domainName = getDomainName(request);
            	System.out.println(domainName);
                if (!"localhost".equals(domainName)) {
                	cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
        	 e.printStackTrace();
        }
    }

    /**
     * 得到cookie的域名
     */
    private static final String getDomainName(HttpServletRequest request) {
        String domainName = null;

        String serverName = request.getRequestURL().toString();
        if (serverName == null || serverName.equals("")) {
            domainName = "";
        } else {
            serverName = serverName.toLowerCase();
            serverName = serverName.substring(7);
            final int end = serverName.indexOf("/");
            serverName = serverName.substring(0, end);
            final String[] domains = serverName.split("\.");
            int len = domains.length;
            if (len > 3) {
                // www.xxx.com.cn
                domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
            } else if (len <= 3 && len > 1) {
                // xxx.com or xxx.cn
                domainName = "." + domains[len - 2] + "." + domains[len - 1];
            } else {
                domainName = serverName;
            }
        }

        if (domainName != null && domainName.indexOf(":") > 0) {
            String[] ary = domainName.split("\:");
            domainName = ary[0];
        }
        return domainName;
    }

}

3.HttpClientUtil    相关包及文档下载

package com.taotao.utils;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
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;

public class HttpClientUtil {

	public static String doGet(String url, Map<String, String> param) {

		// 创建Httpclient对象
		CloseableHttpClient httpclient = HttpClients.createDefault();

		String resultString = "";
		CloseableHttpResponse response = null;
		try {
			// 创建uri
			URIBuilder builder = new URIBuilder(url);
			if (param != null) {
				for (String key : param.keySet()) {
					builder.addParameter(key, param.get(key));
				}
			}
			URI uri = builder.build();

			// 创建http GET请求
			HttpGet httpGet = new HttpGet(uri);

			// 执行请求
			response = httpclient.execute(httpGet);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (response != null) {
					response.close();
				}
				httpclient.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return resultString;
	}

	public static String doGet(String url) {
		return doGet(url, null);
	}

	public static String doPost(String url, Map<String, String> param) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建参数列表
			if (param != null) {
				List<NameValuePair> paramList = new ArrayList<>();
				for (String key : param.keySet()) {
					paramList.add(new BasicNameValuePair(key, param.get(key)));
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
				httpPost.setEntity(entity);
			}
			// 执行http请求
			response = httpClient.execute(httpPost);
			resultString = EntityUtils.toString(response.getEntity(), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				response.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		return resultString;
	}

	public static String doPost(String url) {
		return doPost(url, null);
	}
	
	public static String doPostJson(String url, String json) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建请求内容
			StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
			httpPost.setEntity(entity);
			// 执行http请求
			response = httpClient.execute(httpPost);
			resultString = EntityUtils.toString(response.getEntity(), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				response.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		return resultString;
	}
}

4.FastDFSClient工具类   相关包以及文档下载

package cn.itcast.fastdfs.cliennt;

import org.csource.common.NameValuePair;
import org.csource.fastdfs.ClientGlobal;
import org.csource.fastdfs.StorageClient1;
import org.csource.fastdfs.StorageServer;
import org.csource.fastdfs.TrackerClient;
import org.csource.fastdfs.TrackerServer;

public class FastDFSClient {

	private TrackerClient trackerClient = null;
	private TrackerServer trackerServer = null;
	private StorageServer storageServer = null;
	private StorageClient1 storageClient = null;
	
	public FastDFSClient(String conf) throws Exception {
		if (conf.contains("classpath:")) {
			conf = conf.replace("classpath:", this.getClass().getResource("/").getPath());
		}
		ClientGlobal.init(conf);
		trackerClient = new TrackerClient();
		trackerServer = trackerClient.getConnection();
		storageServer = null;
		storageClient = new StorageClient1(trackerServer, storageServer);
	}
	
	/**
	 * 上传文件方法
	 * <p>Title: uploadFile</p>
	 * <p>Description: </p>
	 * @param fileName 文件全路径
	 * @param extName 文件扩展名，不包含（.）
	 * @param metas 文件扩展信息
	 * @return
	 * @throws Exception
	 */
	public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception {
		String result = storageClient.upload_file1(fileName, extName, metas);
		return result;
	}
	
	public String uploadFile(String fileName) throws Exception {
		return uploadFile(fileName, null, null);
	}
	
	public String uploadFile(String fileName, String extName) throws Exception {
		return uploadFile(fileName, extName, null);
	}
	
	/**
	 * 上传文件方法
	 * <p>Title: uploadFile</p>
	 * <p>Description: </p>
	 * @param fileContent 文件的内容，字节数组
	 * @param extName 文件扩展名
	 * @param metas 文件扩展信息
	 * @return
	 * @throws Exception
	 */
	public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception {
		
		String result = storageClient.upload_file1(fileContent, extName, metas);
		return result;
	}
	
	public String uploadFile(byte[] fileContent) throws Exception {
		return uploadFile(fileContent, null, null);
	}
	
	public String uploadFile(byte[] fileContent, String extName) throws Exception {
		return uploadFile(fileContent, extName, null);
	}
}


public class FastDFSTest {

	@Test
	public void testFileUpload() throws Exception {
		// 1、加载配置文件，配置文件中的内容就是tracker服务的地址。
		ClientGlobal.init("D:/workspaces-itcast/term197/taotao-manager-web/src/main/resources/resource/client.conf");
		// 2、创建一个TrackerClient对象。直接new一个。
		TrackerClient trackerClient = new TrackerClient();
		// 3、使用TrackerClient对象创建连接，获得一个TrackerServer对象。
		TrackerServer trackerServer = trackerClient.getConnection();
		// 4、创建一个StorageServer的引用，值为null
		StorageServer storageServer = null;
		// 5、创建一个StorageClient对象，需要两个参数TrackerServer对象、StorageServer的引用
		StorageClient storageClient = new StorageClient(trackerServer, storageServer);
		// 6、使用StorageClient对象上传图片。
		//扩展名不带“.”
		String[] strings = storageClient.upload_file("D:/Documents/Pictures/images/200811281555127886.jpg", "jpg", null);
		// 7、返回数组。包含组名和图片的路径。
		for (String string : strings) {
			System.out.println(string);
		}
	}
}


5.获取异常的堆栈信息

package com.taotao.utils;

import java.io.PrintWriter;
import java.io.StringWriter;

public class ExceptionUtil {

	/**
	 * 获取异常的堆栈信息
	 * 
	 * @param t
	 * @return
	 */
	public static String getStackTrace(Throwable t) {
		StringWriter sw = new StringWriter();
		PrintWriter pw = new PrintWriter(sw);

		try {
			t.printStackTrace(pw);
			return sw.toString();
		} finally {
			pw.close();
		}
	}
}


6.easyUIDataGrid对象返回值

package com.taotao.result;

import java.util.List;

/**
 * easyUIDataGrid对象返回值
 * <p>Title: EasyUIResult</p>
 * <p>Description: </p>
 * <p>Company: www.itcast.com</p> 
 * @author	入云龙
 * @date	2015年7月21日下午4:12:52
 * @version 1.0
 */
public class EasyUIResult {

	private Integer total;
	
	private List<?> rows;
	
	public EasyUIResult(Integer total, List<?> rows) {
		this.total = total;
		this.rows = rows;
	}
	
	public EasyUIResult(long total, List<?> rows) {
		this.total = (int) total;
		this.rows = rows;
	}

	public Integer getTotal() {
		return total;
	}
	public void setTotal(Integer total) {
		this.total = total;
	}
	public List<?> getRows() {
		return rows;
	}
	public void setRows(List<?> rows) {
		this.rows = rows;
	}
	
	
}

7.ftp上传下载工具类

package com.taotao.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;

/**
 * ftp上传下载工具类
 * <p>Title: FtpUtil</p>
 * <p>Description: </p>
 * <p>Company: www.itcast.com</p> 
 * @author	入云龙
 * @date	2015年7月29日下午8:11:51
 * @version 1.0
 */
public class FtpUtil {

	/** 
	 * Description: 向FTP服务器上传文件 
	 * @param host FTP服务器hostname 
	 * @param port FTP服务器端口 
	 * @param username FTP登录账号 
	 * @param password FTP登录密码 
	 * @param basePath FTP服务器基础目录
	 * @param filePath FTP服务器文件存放路径。例如分日期存放：/2015/01/01。文件的路径为basePath+filePath
	 * @param filename 上传到FTP服务器上的文件名 
	 * @param input 输入流 
	 * @return 成功返回true，否则返回false 
	 */  
	public static boolean uploadFile(String host, int port, String username, String password, String basePath,
			String filePath, String filename, InputStream input) {
		boolean result = false;
		FTPClient ftp = new FTPClient();
		try {
			int reply;
			ftp.connect(host, port);// 连接FTP服务器
			// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器
			ftp.login(username, password);// 登录
			reply = ftp.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				ftp.disconnect();
				return result;
			}
			//切换到上传目录
			if (!ftp.changeWorkingDirectory(basePath+filePath)) {
				//如果目录不存在创建目录
				String[] dirs = filePath.split("/");
				String tempPath = basePath;
				for (String dir : dirs) {
					if (null == dir || "".equals(dir)) continue;
					tempPath += "/" + dir;
					if (!ftp.changeWorkingDirectory(tempPath)) {
						if (!ftp.makeDirectory(tempPath)) {
							return result;
						} else {
							ftp.changeWorkingDirectory(tempPath);
						}
					}
				}
			}
			//设置上传文件的类型为二进制类型
			ftp.setFileType(FTP.BINARY_FILE_TYPE);
			//上传文件
			if (!ftp.storeFile(filename, input)) {
				return result;
			}
			input.close();
			ftp.logout();
			result = true;
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (ftp.isConnected()) {
				try {
					ftp.disconnect();
				} catch (IOException ioe) {
				}
			}
		}
		return result;
	}
	
	/** 
	 * Description: 从FTP服务器下载文件 
	 * @param host FTP服务器hostname 
	 * @param port FTP服务器端口 
	 * @param username FTP登录账号 
	 * @param password FTP登录密码 
	 * @param remotePath FTP服务器上的相对路径 
	 * @param fileName 要下载的文件名 
	 * @param localPath 下载后保存到本地的路径 
	 * @return 
	 */  
	public static boolean downloadFile(String host, int port, String username, String password, String remotePath,
			String fileName, String localPath) {
		boolean result = false;
		FTPClient ftp = new FTPClient();
		try {
			int reply;
			ftp.connect(host, port);
			// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器
			ftp.login(username, password);// 登录
			reply = ftp.getReplyCode();
			if (!FTPReply.isPositiveCompletion(reply)) {
				ftp.disconnect();
				return result;
			}
			ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录
			FTPFile[] fs = ftp.listFiles();
			for (FTPFile ff : fs) {
				if (ff.getName().equals(fileName)) {
					File localFile = new File(localPath + "/" + ff.getName());

					OutputStream is = new FileOutputStream(localFile);
					ftp.retrieveFile(ff.getName(), is);
					is.close();
				}
			}

			ftp.logout();
			result = true;
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (ftp.isConnected()) {
				try {
					ftp.disconnect();
				} catch (IOException ioe) {
				}
			}
		}
		return result;
	}
	
	public static void main(String[] args) {
		try {  
	        FileInputStream in=new FileInputStream(new File("D:\temp\image\gaigeming.jpg"));  
	        boolean flag = uploadFile("192.168.25.133", 21, "ftpuser", "ftpuser", "/home/ftpuser/www/images","/2015/01/21", "gaigeming.jpg", in);  
	        System.out.println(flag);  
	    } catch (FileNotFoundException e) {  
	        e.printStackTrace();  
	    }  
	}
}

8.各种id生成策略

package com.taotao.utils;

import java.util.Random;

/**
 * 各种id生成策略
 * <p>Title: IDUtils</p>
 * <p>Description: </p>
 * @date	2015年7月22日下午2:32:10
 * @version 1.0
 */
public class IDUtils {

	/**
	 * 图片名生成
	 */
	public static String genImageName() {
		//取当前时间的长整形值包含毫秒
		long millis = System.currentTimeMillis();
		//long millis = System.nanoTime();
		//加上三位随机数
		Random random = new Random();
		int end3 = random.nextInt(999);
		//如果不足三位前面补0
		String str = millis + String.format("%03d", end3);
		
		return str;
	}
	
	/**
	 * 商品id生成
	 */
	public static long genItemId() {
		//取当前时间的长整形值包含毫秒
		long millis = System.currentTimeMillis();
		//long millis = System.nanoTime();
		//加上两位随机数
		Random random = new Random();
		int end2 = random.nextInt(99);
		//如果不足两位前面补0
		String str = millis + String.format("%02d", end2);
		long id = new Long(str);
		return id;
	}
	
	public static void main(String[] args) {
		for(int i=0;i< 100;i++)
		System.out.println(genItemId());
	}
}

9.上传图片返回值

package com.result;
/**
 * 上传图片返回值
 * <p>Title: PictureResult</p>
 * <p>Description: </p>
 * <p>Company: www.itcast.com</p> 
 * @author	入云龙
 * @date	2015年7月22日下午2:09:02
 * @version 1.0
 */
public class PictureResult {

	/**
	 * 上传图片返回值，成功：0	失败：1	
	 */
	private Integer error;
	/**
	 * 回显图片使用的url
	 */
	private String url;
	/**
	 * 错误时的错误消息
	 */
	private String message;
	public PictureResult(Integer state, String url) {
		this.url = url;
		this.error = state;
	}
	public PictureResult(Integer state, String url, String errorMessage) {
		this.url = url;
		this.error = state;
		this.message = errorMessage;
	}
	public Integer getError() {
		return error;
	}
	public void setError(Integer error) {
		this.error = error;
	}
	public String getUrl() {
		return url;
	}
	public void setUrl(String url) {
		this.url = url;
	}
	public String getMessage() {
		return message;
	}
	public void setMessage(String message) {
		this.message = message;
	}
	
}

10.自定义响应结构

package com.result;

import java.util.List;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * 自定义响应结构
 */
public class TaotaoResult {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    // 响应业务状态
    private Integer status;

    // 响应消息
    private String msg;

    // 响应中的数据
    private Object data;

    public static TaotaoResult build(Integer status, String msg, Object data) {
        return new TaotaoResult(status, msg, data);
    }

    public static TaotaoResult ok(Object data) {
        return new TaotaoResult(data);
    }

    public static TaotaoResult ok() {
        return new TaotaoResult(null);
    }

    public TaotaoResult() {

    }

    public static TaotaoResult build(Integer status, String msg) {
        return new TaotaoResult(status, msg, null);
    }

    public TaotaoResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public TaotaoResult(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

//    public Boolean isOK() {
//        return this.status == 200;
//    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    /**
     * 将json结果集转化为TaotaoResult对象
     * 
     * @param jsonData json数据
     * @param clazz TaotaoResult中的object类型
     * @return
     */
    public static TaotaoResult formatToPojo(String jsonData, Class<?> clazz) {
        try {
            if (clazz == null) {
                return MAPPER.readValue(jsonData, TaotaoResult.class);
            }
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if (clazz != null) {
                if (data.isObject()) {
                    obj = MAPPER.readValue(data.traverse(), clazz);
                } else if (data.isTextual()) {
                    obj = MAPPER.readValue(data.asText(), clazz);
                }
            }
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 没有object对象的转化
     * 
     * @param json
     * @return
     */
    public static TaotaoResult format(String json) {
        try {
            return MAPPER.readValue(json, TaotaoResult.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * Object是集合转化
     * 
     * @param jsonData json数据
     * @param clazz 集合中的类型
     * @return
     */
    public static TaotaoResult formatToList(String jsonData, Class<?> clazz) {
        try {
            JsonNode jsonNode = MAPPER.readTree(jsonData);
            JsonNode data = jsonNode.get("data");
            Object obj = null;
            if (data.isArray() && data.size() > 0) {
                obj = MAPPER.readValue(data.traverse(),
                        MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
            }
            return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);
        } catch (Exception e) {
            return null;
        }
    }

}

11.jedis操作

package com.taotao.jedis;

public interface JedisClient {

	String set(String key, String value);
	String get(String key);
	Boolean exists(String key);
	Long expire(String key, int seconds);
	Long ttl(String key);
	Long incr(String key);
	Long hset(String key, String field, String value);
	String hget(String key, String field);
	Long hdel(String key, String... field);
}

package com.taotao.jedis;

import org.springframework.beans.factory.annotation.Autowired;

import redis.clients.jedis.JedisCluster;

public class JedisClientCluster implements JedisClient {
	
	@Autowired
	private JedisCluster jedisCluster;

	@Override
	public String set(String key, String value) {
		return jedisCluster.set(key, value);
	}

	@Override
	public String get(String key) {
		return jedisCluster.get(key);
	}

	@Override
	public Boolean exists(String key) {
		return jedisCluster.exists(key);
	}

	@Override
	public Long expire(String key, int seconds) {
		return jedisCluster.expire(key, seconds);
	}

	@Override
	public Long ttl(String key) {
		return jedisCluster.ttl(key);
	}

	@Override
	public Long incr(String key) {
		return jedisCluster.incr(key);
	}

	@Override
	public Long hset(String key, String field, String value) {
		return jedisCluster.hset(key, field, value);
	}

	@Override
	public String hget(String key, String field) {
		return jedisCluster.hget(key, field);
	}

	@Override
	public Long hdel(String key, String... field) {
		return jedisCluster.hdel(key, field);
	}

}


package com.taotao.jedis;


import org.springframework.beans.factory.annotation.Autowired;


import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;


public class JedisClientPool implements JedisClient {
	
	@Autowired
	private JedisPool jedisPool;


	@Override
	public String set(String key, String value) {
		Jedis jedis = jedisPool.getResource();
		String result = jedis.set(key, value);
		jedis.close();
		return result;
	}


	@Override
	public String get(String key) {
		Jedis jedis = jedisPool.getResource();
		String result = jedis.get(key);
		jedis.close();
		return result;
	}


	@Override
	public Boolean exists(String key) {
		Jedis jedis = jedisPool.getResource();
		Boolean result = jedis.exists(key);
		jedis.close();
		return result;
	}


	@Override
	public Long expire(String key, int seconds) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.expire(key, seconds);
		jedis.close();
		return result;
	}


	@Override
	public Long ttl(String key) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.ttl(key);
		jedis.close();
		return result;
	}


	@Override
	public Long incr(String key) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.incr(key);
		jedis.close();
		return result;
	}


	@Override
	public Long hset(String key, String field, String value) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.hset(key, field, value);
		jedis.close();
		return result;
	}


	@Override
	public String hget(String key, String field) {
		Jedis jedis = jedisPool.getResource();
		String result = jedis.hget(key, field);
		jedis.close();
		return result;
	}


	@Override
	public Long hdel(String key, String... field) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.hdel(key, field);
		jedis.close();
		return result;
	}


}

12.待续







版权声明：本文来源CSDN，感谢博主原创文章，遵循 CC 4.0 by-sa 版权协议，转载请附上原文出处链接和本声明。
原文链接：https://blog.csdn.net/qq_22075041/article/details/77431915
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  • 发表于 2020-03-07 21:02:10
  • 阅读 ( 926 )
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