springboot 整合mybatis 报错 No enum constant org.apache.ibatis.type.JdbcType."INTEGER"

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首先,记录一下springboot整合mybatis的使用:

pom.xml:

        <dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.2.0</version>
		</dependency>

建立mapper类:

package com.xt.sell.dataobject.mapper;

import com.xt.sell.dataobject.ProductCategory;

public interface ProductCategoryMapper {

    ProductCategory selectByCategoryType(Integer categoryType);
}

建立对应的xml文件:

文件路径在resource目录下:

<?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.xt.sell.dataobject.mapper.ProductCategoryMapper">

<resultMap id="BaseResultMap" type="com.xt.sell.dataobject.ProductCategory">
    <id column="category_id" property="categoryId" jdbcType="INTEGER"/>
    <id column="category_name" property="categoryName" jdbcType="VARCHAR"/>
    <id column="category_type" property="categoryType" jdbcType="INTEGER"/>
</resultMap>

    <select id="selectByCategoryType" resultMap="BaseResultMap" parameterType="java.lang.Integer">
        select category_id,category_name,category_type
        from product_category
        where category_type = #{category_type,jdbcType=INTEGER}
    </select>
</mapper>

当然,参考SSM的配置应该还需要配置扫描到mapper类:在springboot启动类中进行配置mapperScan

package com.xt.sell;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan(basePackages = "com.xt.sell.dataobject.mapper")
public class SellApplication {

	public static void main(String[] args) {
		SpringApplication.run(SellApplication.class, args);
	}

}

以及还需要配置mapper中xml文件路径:在application.yml中配置

mybatis:
  mapper-locations: classpath:mapper/*.xml

最后进行单元测试:

package com.xt.sell.dataobject.mapper;

import com.xt.sell.dataobject.ProductCategory;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;


@RunWith(SpringRunner.class)
@SpringBootTest
public class ProductCategoryMapperTest {

    @Autowired
    private ProductCategoryMapper mapper;

    @Test
    public void selectByCategoryType() {

        ProductCategory productCategory = mapper.selectByCategoryType(3);
        Assert.assertNotNull(productCategory);
    }
}

运行此方法时,报错:

Error creating bean with name 'xxxx'

因为在IDEA中  mapper注入的时候抛红了,所以一直以为是mapper没有正确注入:

于是仔细检查了mapperScan中路径有没有写错,重新复制路径再次运行还是报错:

No enum constant org.apache.ibatis.type.JdbcType."INTEGER"

意思就是JdbcType中没有"INTEGER"这种类型,那就是xml文件中出错了,仔细检查原来一开始我的sql写成了这样:

 <select id="selectByCategoryType" resultMap="BaseResultMap" parameterType="java.lang.Integer">
        select category_id,category_name,category_type
        from product_category
        where category_type = #{category_type,jdbcType="INTEGER"}
    </select>

jdbcType="INTEGER",这里不需要加引号(这里我是直接从resultMap的column中的jdbcType复制的),去掉之后再次运行方法,成功!

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转载自blog.csdn.net/LuuvyJune/article/details/90288474
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