springboot整合mybatis遇到的一个深坑 Invalid bound statement(not found)
最近一直想要做SSM项目，然后网上找了教程进行学习的时候遇到了一个很深的坑
便是将mybatis代码放置到resource目录下的时候测试即可成功，可是放置到dao包下的时候便出现了错误
Invalid bound statement(not found)，排查了许久终于找出了原因，原来是我pom配置中没有配置好~
代码链接：https://gitee.com/yangyouqi/springboot-mybatis.git
- 使用环境：idea+springboot2.0.1+mybatis
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pom配置：
<?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.yyq</groupId> <artifactId>springboot-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springboot-mybatis</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.1.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-test</artifactId> <scope>test</scope> </dependency> <!--web--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--mysql db--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!-- alibaba的druid数据库连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.9</version> </dependency> <!-- 分页插件 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.5</version> </dependency> </dependencies> <build> <!--放置在dao下的话要在这里配置，让springboot启动时去扫描--> <resources> <resource> <directory>${basedir}/src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> -
application.properties配置
#mysql 基本属性 spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/mytest?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true spring.datasource.username=root spring.datasource.password=123456 ## mybatis config #注意：一定要对应mapper映射xml文件的所在路径 #mybatis.mapper-locations=classpath:mapper/*.xml mybatis.mapperLocations = classpath:com/yyq/springbootmybatis/dao/**/mapper/*.xml #对应实体类所在路径 mybatis.typeAliasesPackage=com.yyq.springbootmybatis.model #pagehelper pagehelper.helper-dialect=mysql pagehelper.reasonable=true pagehelper.support-methods-arguments=true pagehelper.params=count=countSql pagehelper.returnPageInfo=check server.port=8081 -
model,dao,service,controller代码
public class UserDomain { private Integer userId; private String userName; private String password; private String phone; public Integer getUserId() { return userId; } public void setUserId(Integer userId) { this.userId = userId; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } }@Mapper public interface UserDao { int insert(UserDomain record); List<UserDomain> selectUsers(); }public interface UserService { int addUser(UserDomain user); PageInfo<UserDomain> findAllUser(int pageNum, int pageSize); }@Service public class UserServiceImpl implements UserService { @Autowired private UserDao userDao; @Override public int addUser(UserDomain user) { return userDao.insert(user); } /* * 这个方法中用到了我们开头配置依赖的分页插件pagehelper * 很简单，只需要在service层传入参数，然后将参数传递给一个插件的一个静态方法即可； * pageNum 开始页数 * pageSize 每页显示的数据条数 * */ @Override public PageInfo<UserDomain> findAllUser(int pageNum, int pageSize) { PageHelper.startPage(pageNum,pageSize); List<UserDomain> userDomains = userDao.selectUsers(); PageInfo result = new PageInfo(userDomains); return result; } }@Controller @RequestMapping(value = "/user") public class UserController { @Autowired private UserService userService; @ResponseBody @PostMapping("/add") public int addUser(UserDomain user) { return userService.addUser(user); } @ResponseBody @GetMapping("/all") public Object findAllUser(@RequestParam(name = "pageNum", required = false, defaultValue = "1") int pageNum, @RequestParam(name = "pageSize", required = false, defaultValue = "10") int pageSize) { return userService.findAllUser(pageNum, pageSize); } } -
UserMapper.xml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.yyq.springbootmybatis.dao.UserDao"> <insert id="insert" parameterType="com.yyq.springbootmybatis.model.UserDomain"> INSERT INTO t_user (userName,password,phone) VALUES (#{userName},#{password},#{phone}) </insert> <select id="selectUsers" resultType="com.yyq.springbootmybatis.model.UserDomain"> SELECT * FROM t_user </select> </mapper> - 最终项目结构
- 运行结果
打开Postman，输入localhost:8081/user/add?userName=hello&password=123456789&phone=11111
打开数据库
OK已经有数据插入了，完美哈哈