java - Connect to PostgreSQL from SpringBootApplication -

i building simple spring application scratch using maven , postgresql.

i've been following thousand of tutorials isn't clear me store different configurations connect , work postgresql database.

my pom.xml file:

<?xml version="1.0" encoding="utf-8"?>  <project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">   <modelversion>4.0.0</modelversion>    <groupid>org.springframework</groupid>   <artifactid>gs-rest-service</artifactid>   <version>0.1.0</version>    <parent>       <groupid>org.springframework.boot</groupid>       <artifactid>spring-boot-starter-parent</artifactid>       <version>1.3.2.release</version>   </parent>    <dependencies>       <dependency>           <groupid>org.springframework.boot</groupid>           <artifactid>spring-boot-starter-web</artifactid>       </dependency>       <dependency>           <groupid>org.postgresql</groupid>           <artifactid>postgresql</artifactid>           <version>9.4-1201-jdbc4</version>       </dependency>   </dependencies>    <properties>       <java.version>1.8</java.version>   </properties>     <build>       <plugins>           <plugin>               <groupid>org.springframework.boot</groupid>               <artifactid>spring-boot-maven-plugin</artifactid>           </plugin>       </plugins>   </build>    <repositories>       <repository>           <id>spring-releases</id>           <url>https://repo.spring.io/libs-release</url>       </repository>   </repositories>   <pluginrepositories>       <pluginrepository>           <id>spring-releases</id>           <url>https://repo.spring.io/libs-release</url>       </pluginrepository>   </pluginrepositories> </project> 

my src/main/java/quotes/application.java file:

package quotes;  import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication;  @springbootapplication public class application {     public static void main(string[] args) {         springapplication.run(application.class, args);     } } 

my src/main/java/quotes/quote.java file:

package quotes;  public class quote {      private string content;     private string author;      public quote(string content, string author) {         this.content = content;         this.author = author;     }      public string getcontent() {         return this.content;     }      public quote setcontent(string content) {         this.content = content;         return this;     }      public string getauthor() {         return this.author;     }      public quote setauthor(string author) {         this.author = author;         return this;     } } 

and src/main/java/quotes/quotecontroller.java file:

package quotes;  import java.util.concurrent.atomic.atomiclong;  import org.springframework.stereotype.controller; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; import org.springframework.web.bind.annotation.responsebody; import org.springframework.web.bind.annotation.crossorigin;  @controller public class quotecontroller {      private static final string template = "hello, %s!";     private final atomiclong counter = new atomiclong();      @crossorigin(origins = "*")     @requestmapping("/random")     public @responsebody quote randomquote() {         return new quote("¿a dónde vas? patatas traigo", "ortega y pacheco");     }  } 

i can build , run application maven:

mvn clean package java -jar target/*.jar 

the idea modify code on quotecontroller.java connect postgresql , return random stored quote.

could please give advices / clues?

you should try tutorial .

http://devcrumb.com/hibernate/spring-data-jpa-hibernate-maven