elasticsearch 分布式搜索系列专栏:http://blog.csdn.net/xiaohulunb/article/category/2399789
内容涉及代码GitHub地址: 点击打开链接
官方API:http://www.elasticsearch.org/guide/en/elasticsearch/client/java-api/current/index.html
package com.elasticsearch; import com.google.common.collect.Lists; import com.util.date.Joda_Time; import org.elasticsearch.common.xcontent.XContentBuilder; import org.elasticsearch.common.xcontent.XContentFactory; import java.io.IOException; import java.util.Date; import java.util.List; /** * Created by lw on 14-7-8. */ public class User { private String name; private String home;//家乡 private double height;//身高 private int age; private Date birthday; public User() { } public User(String name, String home, double height, int age, Date birthday) { this.name = name; this.home = home; this.height = height; this.age = age; this.birthday = birthday; } /** * 随机生成一个用户信息 * * @return */ public static User getOneRandomUser() { return new User("葫芦" + (int) (Math.random() * 1000) + "娃", "山西省太原市" + (int) (Math.random() * 1000) + "街道", (Math.random() * 1000), (int) (Math.random() * 100), new Date(System.currentTimeMillis() - (long) (Math.random() * 100000))); } /** * 随机生成num个用户信息 * * @param num 生成数量 * @return */ public static List<User> getRandomUsers(int num) { List<User> users = Lists.newArrayList(); if (num < 0) num = 10; for (int i = 0; i < num; i++) { users.add(new User("葫芦" + (int) (Math.random() * 1000) + "娃", "山西省太原市" + (int) (Math.random() * 1000) + "街道", (Math.random() * 1000), (int) (Math.random() * 100), new Date(System.currentTimeMillis() - (long) (Math.random() * 100000)))); } return users; } /** * 封装对象的Json信息 * * @param user * @return * @throws IOException */ public static XContentBuilder getXContentBuilder(User user) throws IOException { return XContentFactory.jsonBuilder() .startObject() .field("name", user.getName())//该字段在上面的方法中mapping定义了,所以该字段就有了自定义的属性,比如 age等 .field("home", user.getHome()) .field("height", user.getHeight()) .field("age", user.getAge()) .field("birthday", user.getBirthday()) .field("state", "默认属性,mapping中没有定义")//该字段在上面方法中的mapping中没有定义,所以该字段的属性使用es默认的. .endObject(); } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getHome() { return home; } public void setHome(String home) { this.home = home; } public double getHeight() { return height; } public void setHeight(double height) { this.height = height; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } }
package com.framework_technology.elasticsearch; import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequestBuilder; import org.elasticsearch.action.admin.indices.alias.exists.AliasesExistRequestBuilder; import org.elasticsearch.action.admin.indices.alias.exists.AliasesExistResponse; import org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder; import org.elasticsearch.action.admin.indices.create.CreateIndexResponse; import org.elasticsearch.action.admin.indices.stats.IndexStats; import org.elasticsearch.action.bulk.BulkRequestBuilder; import org.elasticsearch.action.bulk.BulkResponse; import org.elasticsearch.action.index.IndexResponse; import org.elasticsearch.common.xcontent.XContentBuilder; import org.elasticsearch.common.xcontent.XContentFactory; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Created by lw on 14-7-7. * <p> * mapping创建 * 添加记录到es */ public class Es_BuildIndex { /** * 索引的mapping * <p> * 预定义一个索引的mapping,使用mapping的好处是可以个性的设置某个字段等的属性 * Es_Setting.INDEX_DEMO_01类似于数据库 * mapping 类似于预设某个表的字段类型 * <p> * Mapping,就是对索引库中索引的字段名及其数据类型进行定义,类似于关系数据库中表建立时要定义字段名及其数据类型那样, * 不过es的 mapping比数据库灵活很多,它可以动态添加字段。 * 一般不需要要指定mapping都可以,因为es会自动根据数据格式定义它的类型, * 如果你需要对某 些字段添加特殊属性(如:定义使用其它分词器、是否分词、是否存储等),就必须手动添加mapping。 * 有两种添加mapping的方法,一种是定义在配 置文件中,一种是运行时手动提交mapping,两种选一种就行了。 * * @throws Exception Exception */ protected static void buildIndexMapping() throws Exception { Map<String, Object> settings = new HashMap<>(); settings.put("number_of_shards", 4);//分片数量 settings.put("number_of_replicas", 0);//复制数量 settings.put("refresh_interval", "10s");//刷新时间 //在本例中主要得注意,ttl及timestamp如何用java ,这些字段的具体含义,请去到es官网查看 CreateIndexRequestBuilder cib = Es_Utils.client.admin().indices().prepareCreate(Es_Utils.LOGSTASH_YYYY_MM_DD); cib.setSettings(settings); XContentBuilder mapping = XContentFactory.jsonBuilder() .startObject() .startObject("we3r")// .startObject("_ttl")//有了这个设置,就等于在这个给索引的记录增加了失效时间, //ttl的使用地方如在分布式下,web系统用户登录状态的维护. .field("enabled", true)//默认的false的 .field("default", "5m")//默认的失效时间,d/h/m/s 即天/小时/分钟/秒 .field("store", "yes") .field("index", "not_analyzed") .endObject() .startObject("_timestamp")//这个字段为时间戳字段.即你添加一条索引记录后,自动给该记录增加个时间字段(记录的创建时间),搜索中可以直接搜索该字段. .field("enabled", true) .field("store", "no") .field("index", "not_analyzed") .endObject() //properties下定义的name等等就是属于我们需要的自定义字段了,相当于数据库中的表字段 ,此处相当于创建数据库表 .startObject("properties") .startObject("@timestamp").field("type", "long").endObject() .startObject("name").field("type", "string").field("store", "yes").endObject() .startObject("home").field("type", "string").field("index", "not_analyzed").endObject() .startObject("now_home").field("type", "string").field("index", "not_analyzed").endObject() .startObject("height").field("type", "double").endObject() .startObject("age").field("type", "integer").endObject() .startObject("birthday").field("type", "date").field("format", "YYYY-MM-dd").endObject() .startObject("isRealMen").field("type", "boolean").endObject() .startObject("location").field("lat", "double").field("lon", "double").endObject() .endObject() .endObject() .endObject(); cib.addMapping(Es_Utils.LOGSTASH_YYYY_MM_DD_MAPPING, mapping); cib.execute().actionGet(); } /** * 给 []index 创建别名 * 重载方法可以按照过滤器或者Query 作为一个别名 * * @param aliases aliases别名 * @param indices 多个 index * @return 是否完成 */ protected static boolean createAliases(String aliases, String... indices) { IndicesAliasesRequestBuilder builder = Es_Utils.client.admin().indices().prepareAliases(); return builder.addAlias(indices, aliases).execute().isDone(); } /** * 查询此别名是否存在 * * @param aliases aliases * @return 是否存在 */ protected static boolean aliasesExist(String... aliases) { AliasesExistRequestBuilder builder = Es_Utils.client.admin().indices().prepareAliasesExist(aliases); AliasesExistResponse response = builder.execute().actionGet(); return response.isExists(); } /** * 添加记录到es * <p> * 增加索引记录 * * @param user 添加的记录 * @throws Exception Exception */ protected static void buildIndex(User user) throws Exception { // INDEX_DEMO_01_MAPPING为上个方法中定义的索引,prindextype为类型.jk8231为id,以此可以代替memchche来进行数据的缓存 IndexResponse response = Es_Utils.client.prepareIndex(Es_Utils.LOGSTASH_YYYY_MM_DD, Es_Utils.LOGSTASH_YYYY_MM_DD_MAPPING) .setSource( User.getXContentBuilder(user) ) .setTTL(8000)//这样就等于单独设定了该条记录的失效时间,单位是毫秒,必须在mapping中打开_ttl的设置开关 .execute() .actionGet(); } /** * 批量添加记录到索引 * * @param userList 批量添加数据 * @throws java.io.IOException IOException */ protected static void buildBulkIndex(List<User> userList) throws IOException { BulkRequestBuilder bulkRequest = Es_Utils.client.prepareBulk(); // either use Es_Setting.client#prepare, or use Requests# to directly build index/delete requests for (User user : userList) { //通过add批量添加 bulkRequest.add(Es_Utils.client.prepareIndex(Es_Utils.LOGSTASH_YYYY_MM_DD, Es_Utils.LOGSTASH_YYYY_MM_DD_MAPPING) .setSource( User.getXContentBuilder(user) ) ); } BulkResponse bulkResponse = bulkRequest.execute().actionGet(); //如果失败 if (bulkResponse.hasFailures()) { // process failures by iterating through each bulk response item System.out.println("buildFailureMessage:" + bulkResponse.buildFailureMessage()); } } }