spring data cassandra example

What kind of data source do you usually use when using the spring framework? This blog will share four common spring data source configuration methods. The following uses Oracle10g as an example. First, use the DriverManagerDataSource configuration file that comes with

Usage of @Query annotations (Spring Data JPA) Reference article: http://Www.tuicool.com/articles/jQJBNv 1. A simple example of using @query annotations @query (value="Select Name,author,price from book B where b.price>?1 and b.price") ListLongPrice1,LongPrice2); 2. Like expression @query (value="Select Name,author,price from book B where b.name like%:name%") List

Spring MVC3 return JSON data in Chinese garbled problem solvingCheck out some information on the internet, feeling more complex, here, I use two very simple methods to solve the problem of Chinese garbled.Spring Version: 3.2.2.RELEASEJackson JSON version: 2.1.3WORKAROUND: The controller's method directly writes the string type of JSON data to the network stream t

In the case of a single data source, the Spring boot configuration is very simple, just application.properties configure the connection parameters in the file. But often as the business grows, we usually split the database or introduce other databases, so we need to configure multiple data sources, based on the previous jdbctemplate and

Demand:There are times when we need to connect to multiple databases, but we don't know exactly which to call before the method call. That is, the connection of multiple databases is maintained at the same time, determined according to the parameters passed in the method.Single data source invocation and the process of dynamic invocation of multiple data sources, it can be seen in the DAO layer that a DataS

JdkSerializationRedisSerializerDefault OxmSerializer(Dependent on Spring OXM ) Jackson2JsonRedisSerializer/GenericJackson2JsonRedisSerializer(Dependent on jackson ) Scope of serializationSerialization can be applied to,,, Key Value on, HashKey HashValue in RedisTemplate , four of which correspond to:keySerializer, valueSerializer , hashKeySerializer ,hashValueSerializerJSON-based serializationIntroducing Jackson's MAVEN dependency:To

explained-----------------------------One, the Apache official DBCP document gives the configuration example:See also: http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.htmlMaxactive= "maxidle=" maxwait= "10000"Username= "Javauser" password= "Javadude" driverclassname= "Com.mysql.jdbc.Driver"Url= "Jdbc:mysql://localhost:3306/javatest"/>Tomcat JDBC Connection Pool Configuration example, automatic check connectivity availability, D

Gorky once said--"to use a good spring Data Jpa, you must learn to JPQL." Hey, heh. Students who have studied hibernate may know that there is a hql in Hibernate, which is independent of the database and can be automatically translated into the SQL of the corresponding database. JPQL, too, is an object-oriented language that can be ported. Let's go straight ahead, I can't wait. To emit JPQL queries from wi

First, method name resolution　　1. Introduction　　　　Review the DAO interface in the HelloWorld project Public Interface extends Jparepository{ // New Custom Query method list Findbyage (Integer age);}　　　　As you can see, in this interface we just declare the method without writing the implementation, but it is available, and this is thanks to the JPA method name parsing　　2. Simple condition QueryAccording to the specifications of Spring

Tags: java hibernate spring1, problem: in the use of spring, Hibernate developed database applications, found no matter how, data can not be inserted into the database. But the program does not error, can be queried, can also be inserted. 2. Analysis: Hibernate setting Auto-commit still doesn't work, the reason is simple, it is possible that your program operation table and the table you want to manipulate

Tags: mongodb spring data MongoDB SpringSpring Data MongoDB III: Basic document Queries (query, basicquery) (i) Learn MongoDB Six: MongoDB query (cursor action, cursor information) (iii) A. Introduction Springdata MongoDB provides a org.springframework.data.mongodb.core.MongoTemplate to MongoDB's find operation, we introduced a basic document query, we introduc

Tags: springIntermediate Library mode synchronizing DataConfigure a JdbcTemplate bean in the Spring IoC container, inject the DataSource into it, and then inject jdbctemplate into the custom DAO. Requirements: Write archives, Department base data to Intermediate library, take archives as an example TriggerView all trigger, view trigger Create statement

1, the front-end $.ajax data for JSON submission, the background method must use the @requestbody annotation@RequestMapping (value = "Getcpudata/{interval}/{times}/{req_time}")//@ResponseBodyPublic Jsonobject Getcpumonitordata (httpservletrequest request, @PathVariable ("interval") int interval,@PathVariable ("Times") int times,@PathVariable ("Req_time") String Req_time,@RequestBody jsonobject IP) {2. The value of the

/example/demo/mapper/account/*.xml")); return factoryBean.getObject(); } @Bean @Primary public SqlSessionTemplate sqlSessionTemplate1() throws Exception { SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory1()); // 使用上面配置的Factory return template; }}A second connection configuration:@Configuration@MapperScan(basePackages = {"com.example.demo.mapper.basicbusiness"}, sqlSessionFactoryRef = "sqlSessi

() {flatfileitemwriterNewFlatfileitemwriterGetProperty("User.home"); Resource Outputresource =New Filesystemresource(Userhome +"/output/demo04/test_user.csv"); Itemwriter.Setresource(Outputresource); Itemwriter.Setlineaggregator(NewDelimitedlineaggregatorSetdelimiter(",");Setfieldextractor(NewBeanwrapperfieldextractorSetnames(NewString[] {"id","Name","Age"}); }}); }});returnItemwriter;}2.6 Job StepTestuserconfig.java@Bean PublicStepStep1(jdbccursoritemreaderreturnSteps.Get("Step1"). Chunk(Te

rules defined by the Spring Data JPA method: (1) Simple condition querySimple conditional query: Queries an entity class or collection.In accordance with the specifications of Spring data, the query method begins with a Find | read | Get , and when the query condition is involved, the properties of the condition are c

The recent knowledge of spring Data JPA has been very good, providing a number of methods, including crud and paging, to meet the functional requirements of reality. Altogether it provides four interfaces: Repository: Just an identity, indicating that any inherited it is a warehouse interface class, convenient spring automatic scanning recognitionCrudrepository

Tags: Oracle 11g spring Data java JPA1. Introduction to the development environmentSpring Data 1.6, JDK 1.6, Oracle 11g, Hibernate 4.3.52. The question was raisedIn development, you use annotation to configure the entity, which is the mapping of the object to the table, and the code example is as follows:@Entity (name

time-out classificationstimeouts can be categorized by scope as follows:Transaction Timeout > Statement timeout > JDBC Driver Socket timeoutTransaction timeout refers to a set of SQL operations that should be completed (committed or rolled back) within a set time, otherwise a timeout will be thrown. Its value should be greater than N (number of statements) * Statement TimeoutStatement timeout refers to the maximum allowable time to complete a single SQL statement execution. Its value should be l