简介：Spring boot只使用一个核心配置文件，取消了一系列xml配置，甚至连web.xml都没有,全部使用注解的方式完成WEB层的功能。框架内置Tomcat服务器，运行启动类中的Main函数即可启动。
下面就来搭建Spring boot+Mybatis工程
新建工程
勾上web，其他的不用
Finish
完善一下目录结构：
在pom.xml配置所有相关的依赖：
1 <?xml version="1.0" encoding="UTF-8"?>
2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4 <modelVersion>4.0.0</modelVersion>
5
6 <groupId>com.tqh</groupId>
7 <artifactId>demo</artifactId>
8 <version>0.0.1-SNAPSHOT</version>
9 <packaging>jar</packaging>
10
11 <name>demo</name>
12 <description>Demo project for Spring Boot</description>
13
14 <parent>
15 <groupId>org.springframework.boot</groupId>
16 <artifactId>spring-boot-starter-parent</artifactId>
17 <version>1.5.9.RELEASE</version>
18 <relativePath/> <!-- lookup parent from repository -->
19 </parent>
20
21 <properties>
22 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
23 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
24 <mybatis-spring-boot.version>1.2.0</mybatis-spring-boot.version>
25 <mysql-connector.version>5.1.39</mysql-connector.version>
26 <java.version>1.8</java.version>
27 </properties>
28
29 <dependencies>
30 <dependency>
31 <groupId>org.springframework.boot</groupId>
32 <artifactId>spring-boot-starter-web</artifactId>
33 </dependency>
34
35 <dependency>
36 <groupId>org.springframework.boot</groupId>
37 <artifactId>spring-boot-starter-test</artifactId>
38 <scope>test</scope>
39 </dependency>
40 <dependency>
41 <groupId>org.springframework.boot</groupId>
42 <artifactId>spring-boot-starter-thymeleaf</artifactId>
43 </dependency>
44 <dependency>
45 <groupId>org.mybatis.spring.boot</groupId>
46 <artifactId>mybatis-spring-boot-starter</artifactId>
47 <version>${mybatis-spring-boot.version}</version>
48 </dependency>
49 <dependency>
50 <groupId>mysql</groupId>
51 <artifactId>mysql-connector-java</artifactId>
52 <version>${mysql-connector.version}</version>
53 </dependency>
54 </dependencies>
55
56 <build>
57 <plugins>
58 <plugin>
59 <groupId>org.springframework.boot</groupId>
60 <artifactId>spring-boot-maven-plugin</artifactId>
61 </plugin>
62 </plugins>
63 </build>
64
65
66 </project>
配置核心文件 ：
测试的数据库自己建好，不赘述
1 server.port=9090 不配server.port默认是8080端口，我这里被占用，修改成9090 2 #视图层控制 3 spring.mvc.view.prefix=classpath:/templates/ 4 spring.mvc.view.suffix=.html 5 spring.mvc.static-path-pattern=/static/** 6 7 spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8 8 spring.datasource.username= root 9 spring.datasource.password=root 10 spring.datasource.driver-class-name=com.mysql.jdbc.Driver 11 mybatis.typeAliasesPackage=com.tqh.demo.model
测试
在model包 创建个Person类
1 package com.tqh.demo.model;
2
3 public class Person {
4
5 private Integer id;
6 private String name;
7 private Integer age;
8
9 public Integer getId() {
10 return id;
11 }
12
13 public void setId(Integer id) {
14 this.id = id;
15 }
16
17 public String getName() {
18 return name;
19 }
20
21 public void setName(String name) {
22 this.name = name;
23 }
24
25 public Integer getAge() {
26 return age;
27 }
28
29 public void setAge(Integer age) {
30 this.age = age;
31 }
32
33 @Override
34 public String toString() {
35 return
36 "id=" + id +
37 ", name=‘" + name + ‘\‘‘ +
38 ", age=" + age
39 ;
40 }
41 }
在Mapper包创建一个UserMapper
package com.tqh.demo.mapper;
import com.tqh.demo.model.Person;
import org.apache.ibatis.annotations.Select;
public interface UserMapper {
@Select("SELECT * FROM Person WHERE id = #{id}")
Person selectUser(int id);
}
在Service包创建一个UserService接口及其实现UserServiceImp
1 package com.tqh.demo.service;
2
3
4 import com.tqh.demo.model.Person;
5
6 public interface UserService {
7 Person selectUser(int id);
8
9 }
1 package com.tqh.demo.service.imp;
2
3 import com.tqh.demo.mapper.UserMapper;
4 import com.tqh.demo.model.Person;
5 import com.tqh.demo.service.UserService;
6 import org.springframework.beans.factory.annotation.Autowired;
7 import org.springframework.stereotype.Service;
8
9 @Service
10 public class UserServiceImp implements UserService {
11
12 @Autowired
13 UserMapper userMapper;
14
15 @Override
16 public Person selectUser(int id) {
17 return userMapper.selectUser(id);
18 }
19 }
在controller包新建一个UserController控制器
1 package com.tqh.demo.controller;
2
3 import com.tqh.demo.service.UserService;
4 import org.springframework.beans.factory.annotation.Autowired;
5 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
6 import org.springframework.web.bind.annotation.PathVariable;
7 import org.springframework.web.bind.annotation.RequestMapping;
8 import org.springframework.web.bind.annotation.RestController;
9
10 @RestController
11 @EnableAutoConfiguration
12 public class UserController {
13 @Autowired
14 private UserService userService;
15
16 @RequestMapping("/showUser/{id}")
17 public String selectUser (@PathVariable int id){
18 return userService.selectUser(id).toString();
19
20 }
21 }
编写启动类DemoApplication
1 package com.tqh.demo;
2
3 import org.mybatis.spring.annotation.MapperScan;
4 import org.springframework.boot.SpringApplication;
5 import org.springframework.boot.autoconfigure.SpringBootApplication;
6
7 @MapperScan("com.tqh.demo.mapper")
8 @SpringBootApplication
9 public class DemoApplication {
10
11 public static void main(String[] args) {
12 SpringApplication.run(DemoApplication.class, args);
13 }
14 }
运行DemoApplication，打开浏览器访问http://localhost:9090/showUser/1，成功查询到数据库的数据
时间： 2024-10-11 05:18:30