http、id、json、exception、jedis、cookie、自定义响应式结构模板

实用工具类合集

最新推荐文章于 2025-06-03 09:06:24 发布

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文章标签：

#http #exception #json #id #jedis

java 同时被 2 个专栏收录

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utils

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本文介绍了一套实用的工具类，包括HTTP请求处理、ID生成、JSON操作等。通过这些工具类可以简化常见的编程任务，如发起HTTP请求、生成唯一标识符及处理JSON数据。

http、id、json、exception、jedis、cookie、自定义响应式结构模板

一、整个工具类的编写采用maven工程，pom.xml如下

<dependencies>
    <!-- 时间操作组件 -->
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.5</version>
    </dependency>
    <!-- Apache工具组件 -->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.3.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>
    <dependency>
        <groupId>commons-net</groupId>
        <artifactId>commons-net</artifactId>
        <version>3.3</version>
    </dependency>
    <!-- Jackson Json处理工具包 -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.4.2</version>
    </dependency>
    <!-- httpclient -->
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.3.5</version>
    </dependency>
    <!-- 单元测试 -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
        <version>4.12</version>
    </dependency>
    <!-- 日志处理 -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.4</version>
    </dependency>
    <!-- Redis客户端 -->
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.7.2</version>
    </dependency>
    <!-- cookie相关 -->
    <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <scope>provided</scope>
    <version>2.5</version>&gt;</dependency>
    <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jsp-api</artifactId>
    <scope>provided</scope>
    <version>2.0</version>&gt;</dependency>
</dependencies>

二、HttpUtils（http get有参无参请求，post有参无参请求）

package com.spirits.common.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;
	}
}

三、IDUtilS（各种id生成策略）

package com.spirits.common.utils;

import java.util.Random;

/**
 * 各种id生成策略
 * <p>Title: IDUtils</p>
 * <p>Description: </p>
 * <p>Company: www.iwiteks.com</p> 
 * @author	spirits
 * @date	2017年11月1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());
	}
}

四、JsonUtils（Json字符串转化为对象，对象转换为JSON字符串）

package com.spirits.common.utils;

import java.util.List;

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

/**
 * 淘淘商城自定义响应结构
 */
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;
    }
    
}

五、ExceptionUtils（获取异常的堆栈信息）

package com.spirits.common.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();
		}
	}
}

六、Jedis（redis客户端，分为集群和单机）

（1）接口定义

package com.spirits.sso.dao;

public interface JedisClient {
	
	public String get(String key);

	public String set(String key, String value);

	public String hget(String hkey, String key);

	public long hset(String hkey, String key, String value);

	public long incr(String key);

	public long expire(String key, int second);

	public long ttl(String key);
	
	public long del(String key);
	
	public long hdel(String hkey,String key);
}

（2）单机模式

package com.spirits.sso.dao.impl;

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

import com.taotao.sso.dao.JedisClient;

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

public class JedisClientSimple implements JedisClient{

	@Autowired
	private JedisPool jedisPool; 
	
	@Override
	public String get(String key) {
		Jedis jedis = jedisPool.getResource();
		String string = jedis.get(key);
		jedis.close();
		return string;
	}

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

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

	@Override
	public long hset(String hkey, String key, String value) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.hset(hkey, key, value);
		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 expire(String key, int second) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.expire(key, second);
		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 del(String key) {
		Jedis jedis = jedisPool.getResource();
		Long result = jedis.del(key);
		jedis.close();
		return result;
	}

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

}

（3）集群模式

package com.spirits.sso.dao.impl;

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

import com.taotao.sso.dao.JedisClient;

import redis.clients.jedis.JedisCluster;

public class JedisClientCluster implements JedisClient{

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

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

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

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

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

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

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

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

	@Override
	public long hdel(String hkey, String key) {
		return jedisCluster.hdel(hkey, key);
	}

}

七、Cookie（设置和取cookie）

package com.spirits.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;
    }

}

八、自定义响应式的模板结构

package com.spirits.common.pojo;

import java.util.List;

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

/**
 * 淘淘商城自定义响应结构
 */
public class DiyResult {

    // 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;
        }
    }

}