Spingboot入門小Demo，從部署和搭建至成功執行
阿新 • • 發佈：2018-12-19
沒有spring,springmvc等的基礎，獲得了一個前後端都完整的SSM系統，學習的過程很困難，什麼都不會，花費了很長時間，近期又受老師的指示，開始學習Springboot，從開始部署就踩了很多坑，按照很多網上的教程都沒有成功，今天偶然搭建執行成功，來此記錄，給眾多和我一樣菜的菜鳥以指示。
準備工作：
IDEA以及基本的maven,tomcat外掛，Oracle資料庫（其他資料庫需要更改pom.xml中的Jar包和applicaton.properties中的oracle配置段落，簡單。）
開始搭建：
1、在IDEA中建立Springboot專案：new→project→Spring Initializr，後續省略，自行百度。
2、建立完基礎工程之後，建立好目錄，如下：(Application是被我重新命名後的專案啟動類，在com.example.dao下一級目錄下）
3、程式碼（這個demo的java程式碼是我copy網上的一個demo）
pom.xml：
其中ojdbc jar包因為許可權的問題，需要自行下載然後匯入到IDEA中，參考：
<?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>studydemo01</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.0.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> <!-- mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!-- oracle --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.4</version> </dependency> <!-- druid資料庫連線池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.11</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
com.example.demo.conntroller.UserController:
package com.example.demo.controller; import com.example.demo.entity.User; import com.example.demo.service.UserService; import org.apache.ibatis.annotations.Param; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; /** * Created by 王婷 on 2018/11/2. */ @RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @RequestMapping("/insert") public String InsertUser() { User user = new User(); user.setId(2); user.setAge(18); user.setName("zhou"); userService.insertUser(user); return "成功"; } }
com.example.demo.dao.UserMapper:
package com.example.demo.dao;
import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* Created by 王婷 on 2018/10/31.
*/
@Repository
public interface UserMapper {
void insertUser(User user);
User selectUser(int id);
void deleteUser(int id);
void updateUser(User user);
List<User> findAll();
}com.example.demo.entity.User:
package com.example.demo.entity;
import org.springframework.boot.autoconfigure.domain.EntityScan;
/**
* Created by 王婷 on 2018/10/31.
*/
public class User {
private Integer id;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
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;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
'}';
}
}
com.example.demo.service.UserService:
package com.example.demo.service;
import com.example.demo.entity.User;
import java.util.List;
/**
* Created by 王婷 on 2018/10/31.
*/
public interface UserService {
void insertUser(User user);
User selectUser(int id);
void deleteUser(int id);
List<User> findAll();
}com.example.demo.service.Impl.UserServiceImpl:
ackage com.example.demo.service.Impl;
import com.example.demo.dao.UserMapper;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* Created by 王婷 on 2018/10/31.
*/
@Service("UserService")
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;
@Override
public void insertUser(User user){
userMapper.insertUser(user);
}
@Override
public User selectUser(int id){
return userMapper.selectUser(id);
}
@Override
public void deleteUser(int id){
userMapper.deleteUser(id);
}
@Override
public List<User> findAll(){
return userMapper.findAll();
}
}
mapper：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo.dao.UserMapper">
<select id="selectUser" parameterType="int" resultType="com.example.demo.entity.User">
SELECT id,name,age FROM "USERS" WHERE id=#{id}
</select>
<insert id="insertUser" parameterType="com.example.demo.entity.User">
INSERT INTO "USERS"(id,name,age) VALUES(#{id},#{name},#{age})
</insert>
<delete id="deleteUser" parameterType="int">
DELETE FROM "USERS" WHERE id=#{id}
</delete>
<update id="updateUser" parameterType="com.example.demo.entity.User">
UPDATE "USERS" SET name=#{name},age=#{age} WHERE id=#{id}
</update>
<select id="findAll" resultType="com.example.demo.entity.User">
SELECT id,name,age FROM "USERS"
</select>
</mapper>
application.properties（配置類）:
spring.datasource.url=jdbc:oracle:thin:@localhost:1521:ORCL
spring.datasource.username=scott
spring.datasource.password=tiger
spring.datasource.driver-class-name=oracle.jdbc.OracleDriver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
mybatis.type-aliases-package=com.example.demo
mybatis.mapper-locations=classpath:mapper/*.xml
spring.mvc.view.prefix=/WEB-INF/jsp
spring.mvc.view.suffix=.jsp4、資料庫準備：
（1）安裝Oracle，參考：
（2）建立users表格，依據entity中的User類中的資料建立欄位：id,name,age
發現執行成功，開啟資料庫，發現Controller中的程式碼執行成功，資料成功插入到資料庫中
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