MyBatis DTD [Element type “if“ must be declared]

MyBatis DTD  [Element type "if" must be declared]

<?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">

Downloading external resources is disabled.

http://mybatis.org/dtd/mybatis-3-mapper.dtd

下载到本地放到项目的src/main/resources里面也可以，

修改XML头部定义

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "classpath:mybatis-3-mapper.dtd">

Cannot find DTD 'classpath:mybatis-3-mapper.dtd'.    

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "file:C:\Users\Administrator\Desktop\mybatis-3-mapper.dtd">

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把XML校验全部关闭