使用Intellij IDEA构建Maven项目,使用SpringBoot整合Mybatis
1.新建project
file -> new ->project
2.创建maven项目,选择webapp骨架
3.填写GroupId和ArtifactId
4.展示Maven项目的摘要
5.填写项目的名称和选择项目保存的根路径
6.在src/main路径下新建Directory,命名为java
7.修改java文件的类型
按照图中1-2-3的顺序点击,即可改变java文件的类型
8.在java文件创建com.my.mybatis包,并在com.my.mybatis包的目录下创建controller,service,pojo,mapper包,在sources文件中创建mybatis文件夹和application.yml文件, 在sources/mybatis文件夹创建mappers文件夹和mybatis-config.xml文件
9.编辑mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!-- 开启驼峰自动映射 -->
<setting name="mapUnderscoreToCamelCase" value="true" />
</settings>
</configuration>
10.修改pom.xml文件
a.删除原文件中的内容
b.新增如下内容
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/><!--lookupparentfromrepository-->
</parent>
<!--配置字符集都为UTF-8一般条件下不会出现中文乱码-->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.7</java.version>
</properties>
<!--引入tomcat插件-->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
c.在标签中新增如下代码
<!--表示引入web的配置引入该jar包才能实现浏览器访问-->
<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>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--整合mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<!--使用Springboot默认的Tomcat-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<!-- 配置springboot jsp功能 -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>8.5.6</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>1.2</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<scope>provided</scope>
</dependency>
<!-- 配置springboot jsp功能 结束 -->
11.在controller文件夹中新建UserController的Java Class文件,编写代码
@Controller //添加Controller注解
public class UserController {
@Autowired //添加自动注入注解
private UserService userService;
@RequestMapping("/findUserList") //添加RequestMapping注解
public String findUserList(Model model){
List<User> userList = userService.findUserList();//获取userList集合
model.addAttribute("userList",userList);//将userList保存到request域中
//跳转回用户列表页面
//根据application.yml中mvc设置的前缀和后缀进行拼接
//本例中拼接后为"/WEB-INF/findUserList.jsp"
return "userList";
}
}
12.在service包中创建UserService的java class文件,"Kind"属性选择Interface
编写代码
public interface UserService {
public List<User> findUserList();
}
13.在service包中创建UserServiceImpl的java class文件,"Kind"属性选择Class,编写代码
@Service //添加Service注解
public class UserServiceImpl implements UserService{//实现UserService接口
@Autowired //添加自动注入注解
private UserMapper userMapper;
@Override
public List<User> findUserList() {
return userMapper.findUserList(); //获取userList
}
}
14.在mapper包中创建UserMapper的Java Class文件,“Kind”属性选择Interfaces,编写代码
public interface UserMapper {
public List<User> findUserList();
}
15.在src/main/resources/mybatis/mappers文件中创建UserMapper.xml文件,编写代码
<?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.my.mapper.UserMapper">
<!--namespce中值为序号14中创建的UserMapper文件在当前项目中路径 -->
<!--配置别名包 否则不生效-->
<select id="findUserList" resultType="User">
<!-- id的值与mapper包中的UserMapper方法名一致 -->
select * from user
</select>
</mapper>
16.在pojo中创建User的Java Class文件,编写代码
public class User {
//根据数据库中user表中的列名创建User的属性,并添加set和get方法
private Integer id;
private String name;
private Integer age;
private String sex;
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;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
17.编辑src/main/resources/application.yml文件
server:
port: 8090 #tomcat的运行端口号
context-path: / #匹配规则
spring:
datasource: #设置数据库连接池
driver-class-name: com.mysql.jdbc.Driver #mysql数据库的驱动
url: jdbc:mysql://localhost:3306/springboot #连接本地mysql数据库中springboot数据库
username: root #数据库的连接名称
password: root #与连接名称对应的密码
mvc: #设置mvc
view:
prefix: /WEB-INF/ #前缀
suffix: .jsp #后缀
mybatis:
config-location: classpath:/mybatis/mybatis-config.xml
mapper-locations: classpath:/mybatis/mappers/*.xml
type-aliases-package: com.my.pojo
18.在src/main/webapp/WEB-INF中创建userList.jsp,编写代码
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>您好</title>
</head>
<body>
<table border="1px" width="65%" align="center">
<tr>
<td colspan="6" align="center"><h3>用户信息</h3></td>
</tr>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
<th></th>
</tr>
<c:forEach items="${userList}" var="u">
<tr>
<th>${u.id}</th>
<th>${u.name}</th>
<th>${u.age}</th>
<th>${u.sex}</th>
<th>
<a href="${pageContext.request.contextPath}/toUpdateUser?id=${u.id}"><button>修改</button></a>
<a href="${pageContext.request.contextPath}/deleteUser?id=${u.id}"><button>删除</button></a>
</th>
</tr>
</c:forEach>
<tr align="center">
<td></td>
<td></td>
<td><a href="${pageContext.request.contextPath}/toAddUser"><button>添加用户</button></a></td>
<td><input type="button" id="delUser" value="删除选中用户"/></td>
<td></td>
</tr>
</table>
</body>
</html>
19.配置并启动tomcat
a.点击图中框中下三角
b.点出弹出的Edit……
c.点出左上角中的绿色“+”号,在弹出的下拉框中选择Spring Boot
d.弹出窗口中填写名称和选择入口程序
e.点出图中绿色三角图标,启动tomcat
20.在浏览器中输入localhost:8090/findUserList,显示如下页面,显示内容与数据库中内容一致,说明整合SpringBoot整合mybatis成功