spark与spring集成做web接口

太过爱你忘了你带给我的痛 2022-06-06 08:11 156阅读 0赞

## 需要实现的功能： ##

写访问spark的接口，也就是从web上输入网址就能把我们需要的信息通过提交一个job然后返回给我们json数据。

## 成果展示： ##

通过url请求，然后的到一个wordcount的json结果（借助的是谷歌浏览器postman插件显示的，直接在浏览器上输入网址是一样的效果）  
![wordcount效果图][wordcount]

## 使用的关键技术： ##

java语言编程，springmvc框架，tomcat容器，spark框架，scala相关依赖

## 成体架构： ##

![maven构建的web工程][maven_web]

## 我使用的是maven构建的一个web工程，pom文件如下： ##

<dependencies>
        
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-core_2.11</artifactId>
                <version>1.6.3</version>
    
            </dependency>
            
            <dependency>
                <groupId>org.apache.spark</groupId>
                <artifactId>spark-sql_2.11</artifactId>
                <version>1.6.3</version>
    
            </dependency>
            
            <dependency>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                <version>2.11.11</version>
            </dependency>
            
            <dependency>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-reflect</artifactId>
                <version>2.11.11</version>
            </dependency>
            
            <dependency>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-compiler</artifactId>
                <version>2.11.11</version>
            </dependency>
    
            
            <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-context</artifactId>
              <version>4.3.4.RELEASE</version>
            </dependency>
            
            <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>4.3.4.RELEASE</version>
            </dependency>
            
            <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-web</artifactId>
              <version>4.3.4.RELEASE</version>
            </dependency>
            
            <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>4.3.4.RELEASE</version>
            </dependency>
    
            
            
            <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis</artifactId>
              <version>3.4.1</version>
            </dependency>
    
            
            
            <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis-spring</artifactId>
              <version>1.3.0</version>
            </dependency>
            
            <dependency>
              <groupId>commons-DBCP</groupId>
              <artifactId>commons-DBCP</artifactId>
              <version>1.4</version>
            </dependency>
            <dependency>
              <groupId>org.aspectj</groupId>
              <artifactId>aspectjweaver</artifactId>
              <version>1.8.9</version>
            </dependency>
    
            
            
            <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>druid</artifactId>
              <version>1.0.18</version>
            </dependency>
            
            
            <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.39</version>
            </dependency>
            
            
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.21</version>
            </dependency>
            
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>1.7.21</version>
            </dependency>
            
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>       
            
            <dependency>  
                <groupId>net.sf.json-lib</groupId>  
                <artifactId>json-lib</artifactId>  
                <version>2.4</version>  
                <classifier>jdk15</classifier>  
            </dependency>
      </dependencies>

## web.xml的配置（这里只配置了springmvc容器） ##

<?xml version="1.0" encoding="UTF-8"?>
    
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
    
      <display-name>Archetype Created Web Application</display-name>
      
      <servlet>
        <servlet-name>manager</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
        <servlet-name>manager</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
      
      <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
          <param-name>encoding</param-name>
          <param-value>utf-8</param-value>
        </init-param>
      </filter>
      <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    
      
      <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.properties</param-value>
      </context-param>
      <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
      </listener>
    </web-app>

## 然后就是springMVC的配置文件 ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
        
        <context:component-scan base-package="com.zzrenfeng.zhsx.controller" />
          
        <mvc:annotation-driven />
    
    
        <context:component-scan base-package="com.zzrenfeng.zhsx.service"></context:component-scan>
        <context:component-scan base-package="com.zzrenfeng.zhsx.spark.service"></context:component-scan>
        <context:component-scan base-package="com.zzrenfeng.zhsx.spark.conf"></context:component-scan>
    </beans>

配置文件就就没有了，如果有需要可以再去集成其他的，下面进入编码的介绍

## 对象和json相互转换的工具类： ##

（为什么使用手动的去转换，而没有使用jackson的相关依赖进行自动转换，是我在使用的时候发现使用jackson会对咱们的spark作业有影响，spark作业会异常终止掉）

package com.zzrenfeng.zhsx.util;
    import java.lang.reflect.Field;  
    import java.util.ArrayList;  
    import java.util.HashMap;  
    import java.util.Iterator;  
    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;  
    
    /** * Json与javaBean之间的转换工具类 * * @author * @version * * {@code 现使用json-lib组件实现 * 需要 * json-lib-2.4-jdk15.jar * ezmorph-1.0.6.jar * commons-collections-3.1.jar * commons-lang-2.0.jar * 支持 * } */  
    public class JsonUtil {   
    
    
        /** * 从一个JSON 对象字符格式中得到一个java对象 * * @param jsonString * @param beanCalss * @return */  
        @SuppressWarnings("unchecked")  
        public static <T> T jsonToBean(String jsonString, Class<T> beanCalss) {  
    
            JSONObject jsonObject = JSONObject.fromObject(jsonString);  
            T bean = (T) JSONObject.toBean(jsonObject, beanCalss);  
    
            return bean;  
    
        }  
    
        /** * 将java对象转换成json字符串 * * @param bean * @return */  
        public static String beanToJson(Object bean) {  
    
            JSONObject json = JSONObject.fromObject(bean);  
    
            return json.toString();  
    
        }  
    
        /** * 将java对象转换成json字符串 * * @param bean * @return */  
        public static String beanToJson(Object bean, String[] _nory_changes, boolean nory) {  
    
            JSONObject json = null;  
    
            if(nory){
       //转换_nory_changes里的属性 
    
                Field[] fields = bean.getClass().getDeclaredFields();  
                String str = "";  
                for(Field field : fields){  
    // System.out.println(field.getName()); 
                    str+=(":"+field.getName());  
                }  
                fields = bean.getClass().getSuperclass().getDeclaredFields();  
                for(Field field : fields){  
    // System.out.println(field.getName()); 
                    str+=(":"+field.getName());  
                }  
                str+=":";  
                for(String s : _nory_changes){  
                    str = str.replace(":"+s+":", ":");  
                }  
                json = JSONObject.fromObject(bean,configJson(str.split(":")));  
    
            }else{
       //转换除了_nory_changes里的属性 
    
    
    
                json = JSONObject.fromObject(bean,configJson(_nory_changes));  
            }  
    
    
    
            return json.toString();  
    
        }  
         private static JsonConfig configJson(String[] excludes) {     
    
                    JsonConfig jsonConfig = new JsonConfig();     
    
                    jsonConfig.setExcludes(excludes);     
    // 
                    jsonConfig.setIgnoreDefaultExcludes(false);     
    // 
    // jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT); 
    
    // jsonConfig.registerJsonValueProcessor(Date.class, 
    // 
    // new DateJsonValueProcessor(datePattern)); 
    
    
    
                    return jsonConfig;     
    
                }    
    
    
    
    
    
        /** * 将java对象List集合转换成json字符串 * @param beans * @return */  
        @SuppressWarnings("unchecked")  
        public static String beanListToJson(List beans) {  
    
            StringBuffer rest = new StringBuffer();  
    
            rest.append("[");  
    
            int size = beans.size();  
    
            for (int i = 0; i < size; i++) {  
    
                rest.append(beanToJson(beans.get(i))+((i<size-1)?",":""));  
    
            }  
    
            rest.append("]");  
    
            return rest.toString();  
    
        }  
    
        /** * * @param beans * @param _no_changes * @return */  
        @SuppressWarnings("unchecked")  
        public static String beanListToJson(List beans, String[] _nory_changes, boolean nory) {  
    
            StringBuffer rest = new StringBuffer();  
    
            rest.append("[");  
    
            int size = beans.size();  
    
            for (int i = 0; i < size; i++) {  
                try{  
                    rest.append(beanToJson(beans.get(i),_nory_changes,nory));  
                    if(i<size-1){  
                        rest.append(",");  
                    }  
                }catch(Exception e){  
                    e.printStackTrace();  
                }  
            }  
    
            rest.append("]");  
    
            return rest.toString();  
    
        }  
    
        /** * 从json HASH表达式中获取一个map，改map支持嵌套功能 * * @param jsonString * @return */  
        @SuppressWarnings({ "unchecked" })  
        public static Map jsonToMap(String jsonString) {  
    
            JSONObject jsonObject = JSONObject.fromObject(jsonString);  
            Iterator keyIter = jsonObject.keys();  
            String key;  
            Object value;  
            Map valueMap = new HashMap();  
    
            while (keyIter.hasNext()) {  
    
                key = (String) keyIter.next();  
                value = jsonObject.get(key).toString();  
                valueMap.put(key, value);  
    
            }  
    
            return valueMap;  
        }  
    
        /** * map集合转换成json格式数据 * @param map * @return */  
        public static String mapToJson(Map<String, ?> map, String[] _nory_changes, boolean nory){  
    
            String s_json = "{";  
    
             Set<String> key = map.keySet();  
             for (Iterator<?> it = key.iterator(); it.hasNext();) {  
                 String s = (String) it.next();  
                 if(map.get(s) == null){  
    
                 }else if(map.get(s) instanceof List<?>){  
                     s_json+=(s+":"+JsonUtil.beanListToJson((List<?>)map.get(s), _nory_changes, nory));  
    
                 }else{  
                     JSONObject json = JSONObject.fromObject(map);  
                     s_json += (s+":"+json.toString());;  
                 }  
    
                 if(it.hasNext()){  
                     s_json+=",";  
                 }  
            }  
    
             s_json+="}";  
            return s_json;   
        }  
    
        /** * 从json数组中得到相应java数组 * * @param jsonString * @return */  
        public static Object[] jsonToObjectArray(String jsonString) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
    
            return jsonArray.toArray();  
    
        }  
    
        public static String listToJson(List<?> list) {  
    
            JSONArray jsonArray = JSONArray.fromObject(list);  
    
            return jsonArray.toString();  
    
        }  
    
        /** * 从json对象集合表达式中得到一个java对象列表 * * @param jsonString * @param beanClass * @return */  
        @SuppressWarnings("unchecked")  
        public static <T> List<T> jsonToBeanList(String jsonString, Class<T> beanClass) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
            JSONObject jsonObject;  
            T bean;  
            int size = jsonArray.size();  
            List<T> list = new ArrayList<T>(size);  
    
            for (int i = 0; i < size; i++) {  
    
                jsonObject = jsonArray.getJSONObject(i);  
                bean = (T) JSONObject.toBean(jsonObject, beanClass);  
                list.add(bean);  
    
            }  
    
            return list;  
    
        }  
    
        /** * 从json数组中解析出java字符串数组 * * @param jsonString * @return */  
        public static String[] jsonToStringArray(String jsonString) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
            String[] stringArray = new String[jsonArray.size()];  
            int size = jsonArray.size();  
    
            for (int i = 0; i < size; i++) {  
    
                stringArray[i] = jsonArray.getString(i);  
    
            }  
    
            return stringArray;  
        }  
    
        /** * 从json数组中解析出javaLong型对象数组 * * @param jsonString * @return */  
        public static Long[] jsonToLongArray(String jsonString) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
            int size = jsonArray.size();  
            Long[] longArray = new Long[size];  
    
            for (int i = 0; i < size; i++) {  
    
                longArray[i] = jsonArray.getLong(i);  
    
            }  
    
            return longArray;  
    
        }  
    
        /** * 从json数组中解析出java Integer型对象数组 * * @param jsonString * @return */  
        public static Integer[] jsonToIntegerArray(String jsonString) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
            int size = jsonArray.size();  
            Integer[] integerArray = new Integer[size];  
    
            for (int i = 0; i < size; i++) {  
    
                integerArray[i] = jsonArray.getInt(i);  
    
            }  
    
            return integerArray;  
    
        }  
    
        /** * 从json数组中解析出java Double型对象数组 * * @param jsonString * @return */  
        public static Double[] jsonToDoubleArray(String jsonString) {  
    
            JSONArray jsonArray = JSONArray.fromObject(jsonString);  
            int size = jsonArray.size();  
            Double[] doubleArray = new Double[size];  
    
            for (int i = 0; i < size; i++) {  
    
                doubleArray[i] = jsonArray.getDouble(i);  
    
            }  
    
            return doubleArray;  
    
        }  
    
    }

## spark的工具类：（主要负责sparkcontext的初始化工作） ##

package com.zzrenfeng.zhsx.spark.conf;
    
    import java.io.Serializable;
    
    import org.apache.spark.SparkConf;
    import org.apache.spark.api.java.JavaSparkContext;
    import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
    import org.springframework.stereotype.Component;
    
    @Component
    public class ApplicationConfiguration implements Serializable{ 
    
        private static final long serialVersionUID = 1L;
    
        public SparkConf sparkconf(){
            SparkConf conf = new SparkConf()
                .setMaster("local[*]")
                .setAppName("wc");
            return conf;
        }
        public JavaSparkContext javaSparkContext(){
    
            return new JavaSparkContext(sparkconf());
        }
    
        public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
            return new PropertySourcesPlaceholderConfigurer();
        }
    
        public String filePath(){
            return "E:\\测试文件\\nlog.txt";
        }   
    }

## wordcount model类（对wordcount进行封装） ##

package com.zzrenfeng.zhsx.spark.domain;
    
    import scala.Serializable;
    
    public class WordCount implements Serializable{ 
        /** * */
        private static final long serialVersionUID = 1L;
        private String word;
        private Integer count;
        public WordCount(){}
        public WordCount(String v1, int l) {
            word = v1;
            count = l;
        }
        public String getWord() {
            return word;
        }
        public void setWord(String word) {
            this.word = word;
        }
        public int getCount() {
            return count;
        }
        public void setCount(int count) {
            this.count = count;
        }
        @Override
        public String toString() {
            return "WordCount [word=" + word + ", count=" + count + "]";
        }
    
    }

## spark service类，主要是负责spark word count的job任务逻辑 ##

package com.zzrenfeng.zhsx.spark.service;
    
    import java.util.Arrays;
    import java.util.List;
    
    import org.apache.spark.api.java.JavaPairRDD;
    import org.apache.spark.api.java.JavaRDD;
    import org.apache.spark.api.java.JavaSparkContext;
    import org.apache.spark.api.java.function.FlatMapFunction;
    import org.apache.spark.api.java.function.Function;
    import org.apache.spark.api.java.function.Function2;
    import org.apache.spark.api.java.function.PairFunction;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    import scala.Tuple2;
    
    import com.zzrenfeng.zhsx.spark.conf.ApplicationConfiguration;
    import com.zzrenfeng.zhsx.spark.domain.WordCount;
    @Component
    public class SparkServiceTest implements java.io.Serializable{
        @Autowired
        ApplicationConfiguration applicationConfiguration;
    
        public List<WordCount> doWordCount(){
            JavaSparkContext javaSparkContext = applicationConfiguration.javaSparkContext();
            System.out.println(javaSparkContext);
            JavaRDD<String> file = javaSparkContext.textFile(applicationConfiguration.filePath());
            JavaRDD<String> worlds = file.flatMap(new FlatMapFunction<String, String>() {
    
                @Override
                public Iterable<String> call(String t) throws Exception {
                    // TODO Auto-generated method stub
                    List<String> list = Arrays.asList(t.split(" "));
                    return list;
                }
            });
            JavaRDD<WordCount> wordcount = worlds.map(new Function<String, WordCount>() {
    
                @Override
                public WordCount call(String v1) throws Exception {
    
                    return new WordCount(v1,1);
                }
            });
            JavaPairRDD<String, Integer> pairwordCount = wordcount.mapToPair(new PairFunction<WordCount, String, Integer>() {
    
                @Override
                public Tuple2<String, Integer> call(WordCount t) throws Exception {
                    // TODO Auto-generated method stub
                    return new Tuple2<>(t.getWord() , new Integer(t.getCount()));
    
                }
            });
    
            JavaPairRDD<String, Integer> worldCounts = pairwordCount.reduceByKey(new Function2<Integer, Integer, Integer>() {
    
                @Override
                public Integer call(Integer v1, Integer v2) throws Exception {
                    // TODO Auto-generated method stub
                    return v1+v2;
                }
            });
            JavaRDD result = worldCounts.map(new Function<Tuple2<String,Integer>, WordCount>() {
    
                @Override
                public WordCount call(Tuple2<String, Integer> v1) throws Exception {
                    // TODO Auto-generated method stub
                    return new WordCount(v1._1,v1._2);
                }
            });
            List<WordCount> list = result.collect();
            javaSparkContext.close();
            System.out.println(list.toString());
            return list;
        }
    
    }

## controller层，主要负责请求的拦截 ##

package com.zzrenfeng.zhsx.controller;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import com.zzrenfeng.zhsx.spark.domain.WordCount;
    import com.zzrenfeng.zhsx.spark.service.SparkServiceTest;
    import com.zzrenfeng.zhsx.util.JsonUtil;
    
    @Controller
    @RequestMapping("hello")
    public class ControllerTest {
        @Autowired
        private SparkServiceTest sparkServiceTest;
    
        @RequestMapping("wc")
        @ResponseBody
        public String wordCount(){
            List<WordCount> list = sparkServiceTest.doWordCount();
            return JsonUtil.listToJson(list);
        }
    }

进行启动，然后在浏览器上输入上面的拦截的url就可以看到开始出现的结果了。  
应为这是个web接口，所以可以从各个端去调用，甚至可以用其他语言去调用。  
现在可以愉快的去撸spark代码了，也许有人会问spark不应该用scala开发更好吗？  
个人认为如果是纯粹的数据处理可以使用scala，编写起来太爽了，但是跟其他的集成的时候最好还是用java，毕竟有问题了还可以跟java大牛去讨论讨论。  
欢迎有兴趣的一起来探讨

[wordcount]: /images/20220606/97042bbb0fba47fcac0de7bf8b57a80e.png
[maven_web]: /images/20220606/7479573f3c0040f1ae60e4d2ab1f1740.png