项目介绍
优点：微服务其实就像数据库的分库分表一样，不至于一个地方出错有时候会导致整个系统瘫痪
项目分为2部分，一个是SpringBoot服务器端，一个是Maven项目客户端，客户端调用服务器端的URL从而完成服务器端的与数据交换（此项目内置数据，不与数据库发生数据交换）
注意：先启动服务器端，然后在运行客户端的main方法
项目下载
搭建服务器端环境（SpringBoot项目）
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.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>SpringBoot_Server</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.7.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>
<!--热部署.jar ,当你修改代码后，服务器会自动重启 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.41</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
实体类Student
package com.example.demo.entity;
public class Student {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "Student [username=" + username + ", password=" + password + "]";
}
public Student(String username, String password) {
this.username = username;
this.password = password;
}
public Student() {
}
}
Controller(内置静态数据，存储在Map类型的students中)
package com.example.demo.handler;
import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.example.demo.entity.Student;
@Controller
public class FirstController {
public FirstController() {
Student stu1 = new Student("张三1", "密码1");
Student stu2 = new Student("张三2", "密码2");
Student stu3 = new Student("张三3", "密码3");
students.put(1, stu1);
students.put(2, stu2);
students.put(3, stu3);
}
private Map<Integer, Student> students = new HashMap<>();
@RequestMapping("selectStudentById")
@ResponseBody
public Student selectStudentById(int id) {
return students.get(id);
}
}
启动类
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootServerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootServerApplication.class, args);
}
}
服务器端启动后
客户端（普通Maven项目）
pom.xml(Spring,fastjson)
<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.imooc</groupId>
<artifactId>SpringBoot_Client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<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</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json <dependency> <groupId>org.json</groupId>
<artifactId>json</artifactId> <version>20160810</version> </dependency> -->
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.28</version>
</dependency>
</dependencies>
</project>客户端启动类
package com.example.demo.start;
import org.springframework.web.client.RestTemplate;
import com.alibaba.fastjson.JSON;
import com.example.demo.entity.Student;
public class Main {
public static String BASE_URL = "http://localhost:8080";
public static void main(String[] args) {
RestTemplate rs=new RestTemplate();
String str=rs.getForObject(BASE_URL+"/selectStudentById?id=2", String.class);
System.out.println("从服务器端返回的JSON串："+str);
Student student=JSON.parseObject(str, Student.class);
System.out.println("JSON转换的自定义实体类对象类型："+student.getClass());
System.out.println("JSON转换的自定义实体类对象："+student);
}
}
