最近在学SpringBoot，刚好今天听老师讲了SpringBoot来实现SSM，就打算写篇博客跟大家做个分享。
我的项目架构如图：
新建项目
因为我们要建的是SSM ，所以大家这3个选项选上
Mybatis不好找的话就直接搜索框打字搜索，如图：
新建项目好之后，记得配置下JDK版本 以及Maven的路径（重点！）
如下2张图：
本次项目一共写了7个文件，文件名见图：
其他文件无变动。
首先先在pom.xml添加所需依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> </dependency>
Maven会去帮我们下载。
写实体类User：
package com.etc.entity; import java.util.Date; import org.springframework.format.annotation.DateTimeFormat; public class User { private Integer id; //id private String userCode; //用户编码 private String userName; //用户名称 private String userPassword; //用户密码 private Integer gender; //性别 @DateTimeFormat(pattern="yyyy-MM-dd") private Date birthday; //出生日期 private String phone; //电话 private String address; //地址 private Integer userRole; //用户角色 private Integer createdBy; //创建者 private Date creationDate; //创建时间 private Integer modifyBy; //更新者 private Date modifyDate; //更新时间 private Integer age;//年龄 private String userRoleName; //用户角色名称 private String picUrl; private String idPic; public String getIdPic() { return idPic; } public void setIdPic(String idPic) { this.idPic = idPic; } public String getPicUrl() { return picUrl; } public void setPicUrl(String picUrl) { this.picUrl = picUrl; } public void setAge(Integer age) { this.age = age; } public String getUserRoleName() { return userRoleName; } public void setUserRoleName(String userRoleName) { this.userRoleName = userRoleName; } public Integer getAge() { /*long time = System.currentTimeMillis()-birthday.getTime(); Integer age = Long.valueOf(time/365/24/60/60/1000).IntegerValue();*/ Date date = new Date(); Integer age = date.getYear()-birthday.getYear(); return age; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUserCode() { return userCode; } public void setUserCode(String userCode) { this.userCode = userCode; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getUserPassword() { return userPassword; } public void setUserPassword(String userPassword) { this.userPassword = userPassword; } public Integer getGender() { return gender; } public void setGender(Integer gender) { this.gender = gender; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public Integer getUserRole() { return userRole; } public void setUserRole(Integer userRole) { this.userRole = userRole; } public Integer getCreatedBy() { return createdBy; } public void setCreatedBy(Integer createdBy) { this.createdBy = createdBy; } public Date getCreationDate() { return creationDate; } public void setCreationDate(Date creationDate) { this.creationDate = creationDate; } public Integer getModifyBy() { return modifyBy; } public void setModifyBy(Integer modifyBy) { this.modifyBy = modifyBy; } public Date getModifyDate() { return modifyDate; } public void setModifyDate(Date modifyDate) { this.modifyDate = modifyDate; } }
写application.properties：
server.port=7878 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/smbms?serverTimezone=UTC spring.datasource.username=root spring.datasource.password=root mybatis.mapper-locations=classpath:mapper/*.xml mybatis.type-aliases-package=com.etc.entity
要在数据库里建一张表名为 smbms的表（Mysql），字段的话跟我上面写的User类字段一致就行，账号密码不一致的，自行修改。
（端口号大家可以修改，我的是7878）
写dao层，UserMapper：
package com.etc.dao; import com.etc.entity.User; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import org.apache.ibatis.annotations.Select; import org.springframework.stereotype.Repository; import org.springframework.stereotype.Service; @Repository @Mapper public interface UserMapper { public User getUserById(@Param("id")String id); }
UserService：
package com.etc.controller; import com.etc.dao.UserMapper; import com.etc.entity.User; import com.etc.service.UserService; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController public class UserController { @Resource private UserService userService; @RequestMapping("getUser") public User getUserById(String id) throws Exception { return userService.getUserById(id); } }
UserServiceImpl：
package com.etc.service; import com.etc.dao.UserMapper; import com.etc.entity.User; import org.springframework.stereotype.Service; import javax.annotation.Resource; @Service("userService") public class UserServiceImpl implements UserService{ @Resource private UserMapper userMapper; @Override public User getUserById(String id){ User user = null; try{ user=userMapper.getUserById(id); }catch(Exception e){ user=null; e.getStackTrace(); } return user; } }
最后一个类是前端控制器UserController：
package com.etc.controller; import com.etc.dao.UserMapper; import com.etc.entity.User; import com.etc.service.UserService; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import javax.annotation.Resource; @RestController public class UserController { @Resource private UserService userService; @RequestMapping("getUser") public User getUserById(String id) throws Exception { return userService.getUserById(id); } }
白嫖不好，创作不易。各位的点赞就是我创作的最大动力，如果我有哪里写的不对，欢迎评论区留言进行指正，我们下篇文章见！
老铁，如果有收获，请点个免费的赞鼓励一下博主
