第一章 spring boot實例項目快速搭建
阿新 • • 發佈：2017-10-18
ppi 地址 desc spa .so -m generate ssp get
環境說明：由於此次主要是學習spring cloud,故例子程序都進行簡化，沒有service層。數據庫持久層使用JPA，數據庫使用內嵌的H2。web使用spring mvc，項目構建使用maven，IDE使用myeclipse，jdk 1.8，spring boot使用。
（1）服務提供者項目搭建過程：
pom.xml如下：
<?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>com.antsoldier</groupId> <artifactId>provider</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>provider</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <!-- 此處說明數據庫持久層使用JPA --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <!-- 此處說明web層使用spring mvc --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 此處說明使用內嵌數據庫 H2 --> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <scope>runtime</scope> </dependency> <!-- 使用spring boot框架 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
在classpath下添加啟動配置文件：
application.yml
server:
port: 8083
spring:
jpa:
generate-ddl: false
show-sql: true
hibernate:
ddl-auto: none
datasource:
platform: h2
schema: classpath:database.sql
data: classpath:data.sql
logging:
level:
root: INFO
org.hibernate: INFO
org.hibernate.type.decriptor.sql.BasicBinder: TRACE
org.hibernate.type.decriptor.sql.BasicExtractor: TRACE
com.itmuch: DEBUG
註意：
server:
port: 8083 代表tomcat啟動端口
schema: classpath:database.sql 代表開始執行的建表語句
data: classpath:data.sql 代表初始化插入數據
在classpath下建立database.sql文檔，用來初始化數據庫表。
drop table user if exists; create table user(id bigint, username varchar(20), name varchar(20), age int);
在classpath下建立data.sql文檔，用來為表添加數據。
insert into user(id,username,name,age) values(1,‘user1‘,‘name1‘,20); insert into user(id,username,name,age) values(2,‘user2‘,‘name2‘,21); insert into user(id,username,name,age) values(3,‘user3‘,‘name3‘,23); insert into user(id,username,name,age) values(4,‘user4‘,‘name4‘,24);
在com.antsoldier.model包下創建User類
package com.antsoldier.model; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class User implements Serializable{ @Id @GeneratedValue(strategy=GenerationType.AUTO) private Long id; @Column private String username; @Column private String name; @Column private int age; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }
在com.antsoldier.dao包下創建UserDao類，作為dao層
package com.antsoldier.dao; import com.antsoldier.model.User; import org.springframework.data.jpa.repository.JpaRepository; public interface UserDao extends JpaRepository<User,Long>{ }
在com.antsoldier.controller下創建UserController類，作為controller層
package com.antsoldier.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import com.antsoldier.dao.UserDao; import com.antsoldier.model.User; @RestController public class UserController { @Autowired private UserDao userDao; @GetMapping("/user/findById/{id}") public User findById(@PathVariable Long id){ return userDao.findOne(id); } }
主啟動程序：
package com.antsoldier; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class ProviderApplication { public static void main(String[] args) { SpringApplication.run(ProviderApplication.class, args); } }
運行主啟動程序：輸入網址：http://localhost:8083/user/findById/1
測試服務提供方成功如下：
（2）服務消費方項目搭建如下：
pom.xml
<?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>com.antsoldier</groupId> <artifactId>consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>consumer</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
在classpath下添加啟動配置文件：
application.yml
server:
port: 8073
userServicePath: http://localhost:8083
註意：userServicePath是服務提供方地址
在com.antsoldier.model包下創建User類
package com.antsoldier.model; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class User implements Serializable{ @Id @GeneratedValue(strategy=GenerationType.AUTO) private int id; @Column private String username; @Column private String name; @Column private int age; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } }
在com.antsoldier.controller下創建UserConsumerController類，用來調用遠程服務：
package com.antsoldier.controller; import javax.annotation.Resource; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; import com.antsoldier.model.User; @RestController public class UserConsumerController { @Resource private RestTemplate restTemplate; //需要在主程序中配置此對象 @Value("${userServicePath}") private String userServicePath; @GetMapping(value="/userConsumer/{id}") public User findById(@PathVariable Long id){ return restTemplate.getForObject(userServicePath + "/user/findById/"+id, User.class); } }
註意 @Value就是用來加載application.yml文件中的userServicePath值。
restTemplate對象，需要自己生成，此處為了簡單直接在，主程序中生成對象
主啟動程序：
package com.antsoldier; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication public class ConsumerApplication { @Bean public RestTemplate restTemplate(){ return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(ConsumerApplication.class, args); } }
運行主啟動程序：輸入網址：http://localhost:8073/userConsumer/1
測試消費方成功如下：
註意事項：本人在myeclipse中運行項目時，發現配置文件不起作用經過排查才發現由於項目導入myeclipse時，myeclipse沒有識別項目為maven項目，一定要確保項目左上角有M標識：
項目下載地址：
鏈接：http://pan.baidu.com/s/1c12YM1i 密碼：nw33
第一章 spring boot實例項目快速搭建