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Druid + MyBatis-Plus + MySQL
♦数据源:DruidDataSource
♦持久化技术:MyBatis-Plus / MyBatis
♦数据库: MySQL
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
username: root
password: root
type: com.alibaba.druid.pool.DruidDataSource
spring:
datasource:
druid:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
username: root
password: root
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
username: root
password: root
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/ssm_db?serverTimezone=UTC
username: root
password: root
hikari:
maximum-pool-size: 50
使用JdbcTemplate需要导入
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
代码
@Test void test() { String sql = "select * from tbl_book where id = 1"; List<Book> qurey = jdbcTemplate.query(sql, new RowMapper<Book>() { @Override public Book mapRow(ResultSet rs, int rowNum) throws SQLException { Book temp = new Book(); temp.setId(rs.getInt("id")); temp.setName(rs.getString("name")); temp.setType(rs.getString("type")); temp.setDescription(rs.getString("description")); return temp; } }); System.out.println(qurey); }
配置
spring:
jdbc:
template:
query-timeout: -1 #查询超时时间
max-rows: 500 #最大行数
fetch-size: -1 #批处理数量
server:
port: 80
spring:
h2:
console:
enabled: true
path: /h2
♦ 访问用户名sa,默认密码123456
create table tbl_book (id int,name varchar,type varchar,description varchar)
server:
port: 80
spring:
h2:
console:
enabled: true
path: /h2
datasource:
driver-class-name: org.h2.Driver
url: jdbc:h2:~/test
username: sa
password: 123456
server:
port: 80
spring:
h2:
console:
enabled: flase
path: /h2
server:
port: 80
spring:
h2:
console:
enabled: true
path: /h2
datasource:
# driver-class-name: org.h2.Driver
url: jdbc:h2:~/test
username: sa
password: 123456
内存级
NoSQL数据库持久化
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
spring:
redis:
host: localhost
port: 6379
♦ 主机:localhost(默认)
♦ 端口:6379(默认)
♦ ops*:获取各种数据类型操作接口
@SpringBootTest class Springboot16RedisApplicationTests { @Test void set(@Autowired RedisTemplate redisTemplate) { ValueOperations ops = redisTemplate.opsForValue(); ops.set("age", 41); } @Test void get(@Autowired RedisTemplate redisTemplate) { ValueOperations ops = redisTemplate.opsForValue(); Object age = ops.get("age"); System.out.println(age); } @Test void hset(@Autowired RedisTemplate redisTemplate) { HashOperations hashOperations = redisTemplate.opsForHash(); hashOperations.put("info", "b", "bb"); } @Test void hget(@Autowired RedisTemplate redisTemplate) { HashOperations hashOperations = redisTemplate.opsForHash(); Object val = hashOperations.get("info", "b"); System.out.println(val); } }
@SpringBootTest
public class StringRedisTemplateTest {
@Test
void set(@Autowired StringRedisTemplate stringRedisTemplate) {
ValueOperations ops = stringRedisTemplate.opsForValue();
ops.set("testKey","testKey");
}
@Test
void get(@Autowired StringRedisTemplate stringRedisTemplate) {
ValueOperations<String, String> ops = stringRedisTemplate.opsForValue();
String name = ops.get("testKey");
System.out.println(name);
}
}
客户端选择:jedis
导入依赖
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
配置客户端:
spring:
redis:
host: localhost # 127.0.0.1
port: 6379
client-type: jedis
lettcus与jedis区别
♦ 存储位置:数据库
♦ 特征:永久性存储,修改频度极低
♦ 存储位置:数据库、Mongdb
♦ 特征:永久性存储与临时存储相结合、修改频度较高
♦ 存储位置:数据库、Mongdb
♦ 特征:永久性存储与临时存储相结合、修改频度较高
♦ 存储位置:Mongdb
♦ 特征:临时存储,修改频度飞速
db.集合名称.insert/save/insertOne(文档)
db.集合名称.remove(条件)
db.集合名称.update(条件,{操作种类:{文档}})
♦ 查询全部:db.集合.find();
♦ 查第一条:db.集合.findOne();
♦ 查询指定数量文档:db.集合.find().limit(10) //查10条文档
♦ 跳过指定数量文档:db.集合.find().skip(20) //跳过20条文档
♦ 统计:db.集合.count()
♦ 排序:db.集合.sort({age:1}) //按age升序排序
♦ 投影:db.集合名称.find(条件,{name:1,age:1}) //仅保留name与age域
♦ 基本格式:db.集合.find({条件})
♦ 模糊查询:db.集合.find({域名:/正则表达式/}) //等同SQL中的like,比like强大,可以执行正则所有规则
♦ 条件比较运算:db.集合.find({域名:{$gt:值}}) //等同SQL中的数值比较操作,例如:name>18
♦ 包含查询:db.集合.find({域名:{$in:[值1,值2]}}) //等同于SQL中的in
♦ 条件连接查询:db.集合.find({$and:[{条件1},{条件2}]}) //等同SQL中的and、or
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
spring:
data:
mongodb:
uri: mongodb://localhost/itheima
@SpringBootTest class Springboot17MongodbApplicationTests { @Autowired private MongoTemplate mongoTemplate; @Test void contextLoads() { Book book = new Book(); book.setId(2 ); book.setName("spring1"); book.setType("spring1"); book.setDescription("spring1"); mongoTemplate.save(book); } @Test void find() { List<Book> all = mongoTemplate.findAll(Book.class); System.out.println(all); } }
运行 elasticsearch.bat
运行失败修改bin目录下elasticsearch-env.bat的JDK路径
安装ik分词器解压到plugins目录下
PUT http:/localhost:9200/books
GET http:/localhost:9200/books
DELETE http:/localhost:9200/books
{ "mappings" : { "properties":{ "id":{ "type":"keyword" }, "name":{ "type":"text", "analyzer":"ik_max_word", "copy_to":"all" }, "type":{ "type":"keyword" }, "description":{ "type":"text", "analyzer":"ik_max_word" , "copy_to":"all" }, "all":{ "type":"text", "analyzer":"ik_max_word" } } } }
POST http:/localhost:9200/books/_doc #使用系统生成的id
POST http:/localhost:9200/books/_create/1 #使用指定id
POST http:/localhost:9200/books/_doc/1 #使用指定id,不存在创建,存在更新(版本递增)
{
"name" : "springboot",
"type" : "springboot",
"description" : "springboot"
}
GET http:/localhost:9200/books/_doc/1 #查询单个文档
GET http:/localhost:9200/books/_search #查询全部文档
Get http:/localhost:9200/books/_search?q=name:springboot
DELETE http:/localhost:9200/books/_doc/1
PUT http:/localhost:9200/books/_doc/1
{
"name" : "springboot",
"type" : "springboot",
"description" : "springboot";
}
PUT http:/localhost:9200/books/_update/1
{
"doc" : {
"name" : "springboot"
}
}
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>spring-boot-start-data-elasticsearch</artifactId>
</dependency>
spring:
elasticsearch:
=rest:
uris: http://localhost:9200
@SpringBootTest
class Springboot18EsApplicationTests{
@Autowired
private ElasticsearchRestTemplate template;
}
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
</dependency>
@Test
void testCreateClient() throws IOException {
HttpHost host = HttpHost.create("http://localhost:9200");
RestClientBuilder builder = RestClient.builder(host);
RestHighLevelClient = new RestHighLevelClient(builder);
//客户端操作
CreateIndexRequest request = new CreateIndexRequest("books");
//获取操作索引的客户端对象,调用创建索引操作
client.indices().create(request, RequestOptions.DEFAULT);
//关闭客户端
client.close();
}
@SpringBootTest class Springboot18EsApplicationTests { @Autowired private BookDao bookDao; @Autowired RestHighLevelClient client; @BeforeEach void setUp() { this.client = new RestHighLevelClient(RestClient.builder(HttpHost.create("http://localhost:9200"))); } @AfterEach void tearDown() throws IOException { this.client.close(); } }
@Test void testCreateByIk() throws IOException { HttpHost host = HttpHost.create("http://localhost:9200"); RestClientBuilder builder = RestClient.builder(host); RestClientBuilder client = new RestHighLevelClient(builder); //客户端操作 CreateIndexRequest request = new CreateIndexRequest("books"); //设置要执行的操作 String json = " "; //设置请求中的参数,参数类型json数据 request.source(json, XContentType.JSON); //获取操作索引的客户端对象,调用创建索引操作 client.indices().create(request, RequestOptions.DEFAULT); //关闭客户端 client.close(); }
@Test
//添加文档
void testCreateDoc() throws IOException {
Book book = bookDao.selectById(1);
IndexRequest request = new IndexRequest("books").id(book.getId().toString());
String json = JSON.toJSONString(book);
request.source(json, XContentType.JSON);
client.index(request, RequestOptions.DEFAULT);
}
@Test
void testCreateDocAll() throws IOException {
List<Book> bookList = bookDao.selectList(null);
BulkRequest bulkRequest = new BulkRequest();
for (Book book : bookList) {
IndexRequest request = new IndexRequest("books").id(book.getId().toString());
String json = JSON.toJSONString(book);
request.source(json, XContentType.JSON);
bulkRequest.add(request);
}
client.bulk(bulkRequest, RequestOptions.DEFAULT);
}
//按id查询
@Test
void testGet() throws IOException {
GetRequest request = new GetRequest("books", "1");
GetResponse response = client.get(request, RequestOptions.DEFAULT);
String json = response.getSourceAsString();
System.out.println(json);
}
//按条件查询 @Test void testSearch() throws IOException { SearchRequest request = new SearchRequest("books"); SearchSourceBuilder builder = new SearchSourceBuilder(); builder.query(QueryBuilders.termQuery("name", "java")); request.source(builder); SearchResponse response = client.search(request, RequestOptions.DEFAULT); SearchHits hits = response.getHits(); for (SearchHit hit : hits) { String sourceAsString = hit.getSourceAsString(); Book book = JSON.parseObject(sourceAsString, Book.class); System.out.println(book); } }
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