SpringBoot學習筆記(8)——SpringBoot整合SpringMVC+MyBatis
一、創建項目
1. 修改pom文件
<dependencies>
<!-- springBoot的啓動器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- thymeleaf的啓動器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!-- Mybatis的啓動器 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>
<!-- mysql數據庫驅動 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- druid數據庫連接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
</dependencies>
2. 添加application.properties全局配置文件
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/ssm
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
mybatis.type-aliases-package=com.bjsxt.pojo
其中，url中的ssm爲庫名
3. 數據庫表設計
CREATE TABLE `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) DEFAULT NULL,
`age` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
二、添加用戶
1. 創建實體類
public class Users {
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;
}
}
2. 創建mapper接口以及映射配置文件
創建UsersMapper接口：
public interface UsersMapper {
void insertUser(Users users);
}
創建UsersMapper.xml：
<?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.bjsxt.mapper.UsersMapper">
<insert id="insertUser" parameterType="users">
insert into users(name,age) values(#{name},#{age})
</insert>
</mapper>
3. 創建業務層
@Service
@Transactional
public class UsersServiceImpl implements UsersService {
@Autowired
private UsersMapper usersMapper;
@Override
public void addUser(Users users) {
this.usersMapper.insertUser(users);
}
}
4. 創建Controller
@Controller
@RequestMapping("/users")
public class UsersController {
@Autowired
private UsersService usersService;
/**
* 頁面跳轉
*/
@RequestMapping("/{page}")
public String showPage(@PathVariable String page){
return page;
}
@RequestMapping("/addUser")
public String addUser(Users users){
this.usersService.addUser(users);
return "ok";
}
}
5. 編寫頁面
input.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加用戶</title>
</head>
<body>
<form th:action="@{/users/addUser}" method="post">
用戶姓名：<input type="text" name="name"/><br/>
用戶年齡：<input type="text" name="age"/><br/>
<input type="submit" value="確定"/><br/>
</form>
</body>
</html>
ok.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>操作提示頁面</title>
</head>
<body>
操作成功！！！
</body>
</html>
6. 啓動類
@SpringBootApplication
@MapperScan("com.bjsxt.mapper") //@MapperScan 用戶掃描MyBatis的Mapper接口
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
三、查詢用戶
1. 在mapper接口以及映射配置文件中添加相關代碼
List<Users> selectUsersAll();
<select id="selectUsersAll" resultType="users">
select id,name,age from users
</select>
2. 在業務層中添加查詢方法
@Override
public List<Users> findUserAll() {
return this.usersMapper.selectUsersAll();
}
3. 在Controller中添加方法
@RequestMapping("/findUserAll")
public String findUserAll(Model model){
List<Users> list = this.usersService.findUserAll();
model.addAttribute("list", list);
return "showUsers";
}
4. 添加頁面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>展示用戶數據</title>
</head>
<body>
<table border="1" style="width:300px;">
<tr>
<th>用戶ID</th>
<th>用戶姓名</th>
<th>用戶年齡</th>
</tr>
<tr th:each="user : ${list}">
<td th:text="${user.id}"></td>
<td th:text="${user.name}"></td>
<td th:text="${user.age}"></td>
</tr>
</table>
</body>
</html>
四、更新用戶
1. 更新用戶之前的查詢，並將數據在頁面中回顯
1.1 在mapper接口以及映射配置文件中添加相關代碼
Users selectUsersById(Integer id);
<select id="selectUsersById" resultType="users">
select id,name,age from users where id = #{value}
</select>
1.2 修改業務層代碼
@Override
public Users findUserById(Integer id) {
return this.usersMapper.selectUsersById(id);
}
1.3 修改Controller
@RequestMapping("/findUserById")
public String findUserById(Integer id,Model model){
Users user = this.usersService.findUserById(id);
model.addAttribute("user", user);
return "updateUser";
}
1.4 添加頁面updateUsers.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form th:action="@{/users/editUser}" method="post">
<input type="hidden" name="id" th:field="${user.id}"/>
用戶姓名：<input type="text" name="name" th:field="${user.name}"/><br/>
用戶年齡：<input type="text" name="age" th:field="${user.age}"/><br/>
<input type="submit" value="確定"/><br/>
</form>
</body>
</html>
1.5 修改showUsers.html頁面，添加操作功能
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>展示用戶數據</title>
</head>
<body>
<table border="1" style="width:300px;">
<tr>
<th>用戶ID</th>
<th>用戶姓名</th>
<th>用戶年齡</th>
<th>操作</th>
</tr>
<tr th:each="user : ${list}">
<td th:text="${user.id}"></td>
<td th:text="${user.name}"></td>
<td th:text="${user.age}"></td>
<td>
<a th:href="@{/users/findUserById(id=${user.id})}">更新用戶</a>
</td>
</tr>
</table>
</body>
</html>
2. 用戶更新
2.1 在mapper接口以及映射配置文件中添加相關代碼
void updateUser(Users users);
<update id="updateUser" parameterType="users">
update users set name=#{name} ,age=#{age} where id=#{id}
</update>
2.2 修改業務層代碼
@Override
public void updateUser(Users users) {
this.usersMapper.updateUser(users);
}
2.3 修改Controller
@RequestMapping("/editUser")
public String editUser(Users users){
this.usersService.updateUser(users);
return "ok";
}
五、刪除用戶
1. 在mapper接口以及映射配置文件中添加相關代碼
void deleteUserById(Integer id);
<delete id="deleteUserById">
delete from users where id = #{value}
</delete>
2. 修改業務層代碼
@Override
public void deleteUserById(Integer id) {
this.usersMapper.deleteUserById(id);
}
3. 修改Controller
@RequestMapping("/delUser")
public String delUser(Integer id){
this.usersService.deleteUserById(id);
return "redirect:/users/findUserAll";
}
4. 修改showUsers.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>展示用戶數據</title>
</head>
<body>
<table border="1" style="width:300px;">
<tr>
<th>用戶ID</th>
<th>用戶姓名</th>
<th>用戶年齡</th>
<th>操作</th>
</tr>
<tr th:each="user : ${list}">
<td th:text="${user.id}"></td>
<td th:text="${user.name}"></td>
<td th:text="${user.age}"></td>
<td>
<a th:href="@{/users/findUserById(id=${user.id})}">更新用戶</a>
<a th:href="@{/users/delUser(id=${user.id})}">刪除用戶</a>
</td>
</tr>
</table>
</body>
</html>