mybatis的dao注入失败

转载自https://blog.csdn.net/hanpenghu/article/details/83897618

springboot maven资源路径配置 resource路径配置, 解决mybatis的xml放在java路径而没有放在resource路径下报错的问题

2018年11月09日 14:48:26 hanpenghu 阅读数：99

 

我是这样配置的

1.  
   <build>
2.  
   <!--resources配置解决mybatis 的mapperXml配置在java路径不被扫描的问题 -->
3.  
   <resources>
4.  
   <resource>
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   <directory>src/main/java</directory>
6.  
   </resource>
7.  
   <resource>
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   <directory>src/main/resources</directory>
9.  
   </resource>
10.  
    </resources>
11.  
    <plugins>
12.  
    <plugin>
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    <groupId>org.springframework.boot</groupId>
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    <artifactId>spring-boot-maven-plugin</artifactId>
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    </plugin>
16.  
    <!--跳过测试 -->
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    <plugin>
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    <groupId>org.apache.maven.plugins</groupId>
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    <artifactId>maven-surefire-plugin</artifactId>
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    <configuration>
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    <skipTests>true</skipTests>
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    </configuration>
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    </plugin>
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    </plugins>
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    </build>
26.  
     
27.  
     
28.  
    </project>

然后在资源文件 application.properites里面配置mybatis的xml路径

1.  
   server.port=8081
2.  
    
3.  
   #必须有
4.  
   mybatis.mapper-locations=classpath*:com/hanhan/dao/xmlMapper/*.xml
5.  
   #必须有
6.  
   logging.config=classpath:logback.xml
7.  
   #必须有
8.  
   spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
9.  
   #必须有
10.  
    spring.datasource.url=jdbc:mysql://127.0.0.1:3307/ipace?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=CTT
11.  
    #必须有
12.  
    spring.datasource.username=root
13.  
    #必须用
14.  
    spring.datasource.password=root
15.  
     
16.  
     
17.  
    #32位随机字符串
18.  
    #dd9008e5ec8608c9eb9d57ab764651eb
19.  
    rand.str = ${random.value}
20.  
    #36位,比32位的多了4个-
21.  
    #0cf88531-9569-44c4-926e-2528dd5948e2
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    rand.uuid = ${random.uuid}
23.  
    #随机int类型,主意有负数
24.  
    rand.intid = ${random.int}
25.  
    #随机long类型
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    rand.longid = ${random.long}
27.  
    #100以内的随机int类型
28.  
    rand.number = ${random.int(100)}
29.  
    #0-10亿范围内的随机int类型
30.  
    rand.range = ${random.int[0,1000000000]}
31.  
     

java的接口mapper路径扫描在启动类上配置 

1.  
   import org.mybatis.spring.annotation.MapperScan;
2.  
   import org.springframework.boot.SpringApplication;
3.  
   import org.springframework.boot.autoconfigure.SpringBootApplication;
4.  
   import org.springframework.scheduling.annotation.EnableScheduling;
5.  
    
6.  
   @SpringBootApplication(scanBasePackages = {"com.hanhan","hanhan"})
7.  
   @MapperScan({"com.hanhan.dao"})
8.  
   @EnableScheduling
9.  
   public class BeetltestApplication {
10.  
     
11.  
     
12.  
    public static void main(String[] args) {
13.  
    SpringApplication.run(BeetltestApplication.class, args);
14.  
    }
15.  

贴完别人的  说下我的问题，

首先是引入springboot集成的mybatis的jar包

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.2</version>
</dependency>

其次是applicatioin的配置文件配置数据库的连接等

spring:
  datasource:
    name: feibi
    url: jdbc:mysql://****/i***
    username: ***
    password: ***
    # 使用druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    filters: stat
    maxActive: 20
    initialSize: 1
    maxWait: 60000
    minIdle: 1
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: select 'x'
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    maxOpenPreparedStatements: 20

applicatioin里还要配置mybatis的扫描xml文件位置

mybatis:
  mapper-locations: classpath:mybatis/*.xml
  config-location: classpath:conf/mybatis-config.xml
  check-config-location: true

最后是启动类需要加入mapperscan

@MapperScan("com.*.*.dao")