[网络协议]Spring boot常用工具集

请求相关（GET、POST、PUT、DELETE）

package com.hry.myapp.utils;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;


import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpUtils {

    /**
     * get
     * 发送get请求
     * @param host   主机地址
     * @param path  请求路径
     * @param method    请求方法 get
     * @param headers   请求头数据,使用map封装
     * @param querys    请求参数,使用map封装
     * @return
     * @throws Exception
     */
    public static HttpResponse doGet(String host, String path, String method,
                                     Map<String, String> headers,
                                     Map<String, String> querys)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpGet request = new HttpGet(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        return httpClient.execute(request);
    }

    /**
     * post form
     *
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @param bodys     请求体,使用map封装
     * @return
     * @throws Exception
     */
    public static HttpResponse doPost(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys,
                                      Map<String, String> bodys)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpPost request = new HttpPost(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        if (bodys != null) {
            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();

            for (String key : bodys.keySet()) {
                nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));
            }
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");
            formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");
            request.setEntity(formEntity);
        }

        return httpClient.execute(request);
    }

    /**
     * Post String
     *
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @param body
     * @return
     * @throws Exception
     */
    public static HttpResponse doPost(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys,
                                      String body)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpPost request = new HttpPost(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        if (StringUtils.isNotBlank(body)) {
            request.setEntity(new StringEntity(body, "utf-8"));
        }

        return httpClient.execute(request);
    }

    /**
     * Post stream
     *
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @param body
     * @return
     * @throws Exception
     */
    public static HttpResponse doPost(String host, String path, String method,
                                      Map<String, String> headers,
                                      Map<String, String> querys,
                                      byte[] body)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpPost request = new HttpPost(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        if (body != null) {
            request.setEntity(new ByteArrayEntity(body));
        }

        return httpClient.execute(request);
    }

    /**
     * Put String
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @param body
     * @return
     * @throws Exception
     */
    public static HttpResponse doPut(String host, String path, String method,
                                     Map<String, String> headers,
                                     Map<String, String> querys,
                                     String body)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpPut request = new HttpPut(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        if (StringUtils.isNotBlank(body)) {
            request.setEntity(new StringEntity(body, "utf-8"));
        }

        return httpClient.execute(request);
    }

    /**
     * Put stream
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @param body
     * @return
     * @throws Exception
     */
    public static HttpResponse doPut(String host, String path, String method,
                                     Map<String, String> headers,
                                     Map<String, String> querys,
                                     byte[] body)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpPut request = new HttpPut(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        if (body != null) {
            request.setEntity(new ByteArrayEntity(body));
        }

        return httpClient.execute(request);
    }

    /**
     * Delete
     *
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @return
     * @throws Exception
     */
    public static HttpResponse doDelete(String host, String path, String method,
                                        Map<String, String> headers,
                                        Map<String, String> querys)
            throws Exception {
        HttpClient httpClient = wrapClient(host);

        HttpDelete request = new HttpDelete(buildUrl(host, path, querys));
        for (Map.Entry<String, String> e : headers.entrySet()) {
            request.addHeader(e.getKey(), e.getValue());
        }

        return httpClient.execute(request);
    }

    private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {
        StringBuilder sbUrl = new StringBuilder();
        sbUrl.append(host);
        if (StringUtils.isNotBlank(path)) {
            sbUrl.append(path);
        }
        if (null != querys) {
            StringBuilder sbQuery = new StringBuilder();
            for (Map.Entry<String, String> query : querys.entrySet()) {
                if (0 < sbQuery.length()) {
                    sbQuery.append("&");
                }
                if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
                    sbQuery.append(query.getValue());
                }
                if (!StringUtils.isBlank(query.getKey())) {
                    sbQuery.append(query.getKey());
                    if (!StringUtils.isBlank(query.getValue())) {
                        sbQuery.append("=");
                        sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));
                    }
                }
            }
            if (0 < sbQuery.length()) {
                sbUrl.append("?").append(sbQuery);
            }
        }

        return sbUrl.toString();
    }

    private static HttpClient wrapClient(String host) {
        HttpClient httpClient = new DefaultHttpClient();
        if (host.startsWith("https://")) {
            sslClient(httpClient);
        }

        return httpClient;
    }

    private static void sslClient(HttpClient httpClient) {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
                public void checkClientTrusted(X509Certificate[] xcs, String str) {

                }
                public void checkServerTrusted(X509Certificate[] xcs, String str) {

                }
            };
            ctx.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx);
            ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager ccm = httpClient.getConnectionManager();
            SchemeRegistry registry = ccm.getSchemeRegistry();
            registry.register(new Scheme("https", 443, ssf));
        } catch (KeyManagementException ex) {
            throw new RuntimeException(ex);
        } catch (NoSuchAlgorithmException ex) {
            throw new RuntimeException(ex);
        }
    }
}

类对象和Map转换

package com.hry.myapp.utils;

import java.lang.reflect.Modifier;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import com.alibaba.druid.sql.ast.SQLStructDataType.Field;
import com.baomidou.mybatisplus.core.toolkit.BeanUtils;


public class CommonUtils {
	
	@SuppressWarnings("deprecation")
	public static <T> T mapToObject(Map<String, Object> map, Class<T> clazz) {
        
//        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS+00:00");
        
		Set<String> set = map.keySet();

         
        if (map == null) {
            return null;
        }
        T obj = null;
        try {
       	
            // 使用newInstance来创建对象
            obj = clazz.newInstance();
            // 获取类中的所有字段
            java.lang.reflect.Field[] fields = obj.getClass().getDeclaredFields();
            for (java.lang.reflect.Field field : fields) {
                int mod = field.getModifiers();
                // 判断是拥有某个修饰符
                if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {
                    continue;
                }
                // 当字段使用private修饰时，需要加上
                field.setAccessible(true);
                // 获取参数类型名字
                String filedTypeName = field.getType().getName();
                // 判断是否为时间类型，使用equalsIgnoreCase比较字符串，不区分大小写
                // 给obj的属性赋值
                
                

            	if(set.contains(field.getName())){


            		
            		
            		if(filedTypeName.equals("int")) {
        			
	        			int value = Integer.parseInt(map.get(field.getName()).toString()) ;
	        			field.set(obj, value);
        			
        			}else if(filedTypeName.equals("float")) {
            			
            			float value = Float.parseFloat(map.get(field.getName()).toString()) ;
            			field.set(obj, value);
            			
            		}else if(filedTypeName.equalsIgnoreCase("java.util.date")){
        			
	                    String datetimestamp = map.get(field.getName()).toString();
	                    if (datetimestamp.equalsIgnoreCase("null")) {
                    	
                        field.set(obj, null);
                        
                    } else {
                    	
            			Long value = Long.parseLong(map.get(field.getName()).toString()) ;
            			Date d = new Date(value) ;
            			field.set(obj, d);
                      
                    }
                    
        		}else {
    			
        			field.set(obj, map.get(field.getName()));

        		}

            		
            		

//            			
            		}

            	}
                    
                    
                
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return obj;
    }
	
	
	@SuppressWarnings("deprecation")
	public static Map ObjectToMap(Object obj) {
        

        Map<String,Object> propertiesMap=new HashMap<>();
        
        java.lang.reflect.Field[] fields = obj.getClass().getDeclaredFields();
        for(int i = 0 , len = fields.length; i < len; i++) {
            // 对于每个属性，获取属性名
            String varName = fields[i].getName();
            try {
                // 获取原来的访问控制权限
                boolean accessFlag = fields[i].isAccessible();
                // 修改访问控制权限
                fields[i].setAccessible(true);
                // 获取在对象f中属性fields[i]对应的对象中的变量
                Object o;
                try {
                    o = fields[i].get(obj);
                    propertiesMap.put(varName,o);
                } catch (IllegalAccessException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                // 恢复访问控制权限
                fields[i].setAccessible(accessFlag);
            } catch (IllegalArgumentException ex) {
                ex.printStackTrace();
            }
        }
        
        return propertiesMap;
        
        
    }
	
	

}

Json转Map

package com.hry.myapp.utils;

import java.util.HashMap;
import java.util.Map;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonUtils {
	
	public Map<String, Object> jsonToMap(String json) throws JsonMappingException, JsonProcessingException{
		
        ObjectMapper mapper = new ObjectMapper();
        Map<String,Object> resultMap = mapper.readValue(json, new TypeReference<HashMap<String,Object>>(){});
                
		return resultMap;
	}

}

字符串相关

字符串空与非空判断

package com.hry.myapp.utils;

public class StringUtils {
	
	public static boolean isNotBlank(String str) {
		
		
		return (str==null&&"".equals(str))? true:false ;
		
	}
	
	public static boolean isBlank(String str) {
		
		
		return "".equals(str) ;
		
	}
	
}