新建maven(或者直接新建springboot)项目,这里用springboot版本为1.5,然后添加web、mysql、mybatis等相关依赖,接着添加SpringCloud依赖,properties文件进行配置,编写实体类、Mapper、Controller,然后进行测试
新建maven(springboot)项目:
选择基于SpringBoot1.5的版本,并添加Web、MySQL、MyBatis相关依赖
点击finsh完成,然后建立目录com.lyl.cloud.entity、com.lyl.cloud.mapper、com.lyl.cloud.controller等大致项目结构如下
我们对pom进行配置,添加SpringCloud的依赖
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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.19.BUILD-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.lyl.cloud</groupId>
<artifactId>provider-user</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>provider-user</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<!-- web、mybatis与mysql的依赖文件 -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<!-- springcloud的依赖 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Finchley.M7</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
</pluginRepositories>
</project>
application.properties
#mybatis扫描路径
mybatis.type-aliases-package=com.lyl.cloud.entity
#mysql连接配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/cloud?useUnicode=true&characterEncoding=UTF-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
#springMVC配置
spring.mvc.view.prefix=classpath:/templates/*
#配置端口
server.port=8000
User.java
package com.lyl.cloud.entity;
import java.math.BigDecimal;
public class User {
private Long id;
private String username;
private String name;
private Integer age;
private BigDecimal banlance;
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 Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public BigDecimal getBanlance() {
return banlance;
}
public void setBanlance(BigDecimal banlance) {
this.banlance = banlance;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", name=" + name + ", age=" + age + ", banlance="
+ banlance + "]";
}
}
UserMapper.java
package com.lyl.cloud.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Component;
import com.lyl.cloud.entity.User;
@Mapper
@Component("UserMapper")
public interface UserMapper {
@Select("select * from user where id = #{id}")
public List<User> findId(@Param(value="id") Long id);
}
UserController.java
package com.lyl.cloud.controller;
import java.util.List;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.lyl.cloud.entity.User;
import com.lyl.cloud.mapper.UserMapper;
@Controller
public class UserController {
@Autowired
private UserMapper userMapper;
@RequestMapping("/{id}")
@ResponseBody
public User findById(@PathVariable Long id) {
List<User> userlist = this.userMapper.findId(id);
User user = userlist.get(0);
return user;
}
}
启动类ProviderUserApplication.java
package com.lyl.cloud;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.lyl.cloud.mapper.*")
public class ProviderUserApplication {
public static void main(String[] args) {
SpringApplication.run(ProviderUserApplication.class, args);
}
}
数据库配置
mysql新建是一个数据库取名cloud,
相应表结构并新增三条数据
我们启动项目可以看到8000端口已开
打开浏览器输入localhost:8000/1,查询id为1的用户