Mybaitis配置过程注意点_MySQL

• 在mybatis-config.xml中配置分页插件，插件配置必须放在mapper前面

    <plugins>        <plugin interceptor="com.rrtong.frame.dao.PaginationInterceptor">            <property name="dialect" value="oracle"></property>        </plugin>    </plugins>    

• Mybatis分页拦截器获取sql
  

      /*以下得到的是要执行的sql语句，并不是配置的sql语句*/      StatementHandler statementHandler = (StatementHandler)invocation.getTarget();      BoundSql boundSql = statementHandler.getBoundSql();      String originalSql = boundSql.getSql();    

• 出现java.lang.AbstractMethodError: org.mybatis.spring.transaction.SpringManagedTransactionFactory.newTransaction(Ljava/sql/Connection;)Lorg/apache/ibatis/transaction/Transaction;

            版本不正确，需要使用更高版本的 mybatis-spring

           https://mybatis.googlecode.com/files/mybatis-spring-1.2.1.zip

• Mybaitis参数严格区分大小写
  

             mybatis 配置文件中的参数绑定区分大小写，必须与传递的参数名保持一致

• 出现数据类型111时，这是因为数据库字段数据类型与entity中的字段定义的数据类型不一致导致的,有以下两种方法解决
  

              1、设定entity的数据类型与数据库类型一致
              2、在sql中定义参数的数据类型，比如

        where userCode = #{userCode, jdbcType=VARCHAR}

• 实现数据库字段与实体字段的关系对应
  

     <resultmap id="Archive" type="Archive">          <id column="ARCHIVESKEY" property="archiveKey"></id>          <result column="title" property="archiveTitle"></result>      </resultmap>

• 定义oracle数据库的mybatis获取主键并返回的配置，mybatis before after设置
  

<p>       <selectkey keyproperty="archiveKey" order="BEFORE" resulttype="String">           SELECT  SEQ_ARCHIVE.NEXTVAL           FROM DUAL       </selectkey></p>

• 定义其他数据库的Mybatis获取主键并返回的配置

    <insert id="insertUser" usegeneratedkeys="true" keyproperty="userId" parametertype="com.mybatis.User">          insert into user(userName,password)          values(#{userName},#{password})      </insert>  

• 定义mybatis查询结果注入到实体中

       <resultmap id="Archive" type="Archive">             <id property="archiveKey"></id>             <result column="title" property="archiveTitle"></result>            </resultmap>       <select id="getArchive" parametertype="HashMap" resultmap="Archive">		select 		    SPAARCHIVESKEY,		    TITLE	    		from Archives		where USERCODE = #{userCode, jdbcType=VARCHAR}	                And VALID= #{valid, jdbcType=VARCHAR}			</select>

• 定义Mybaitis更新数据库表记录

        <update id="updateArchive" parametertype="Archive">		update Tbl_ARCHIVES		set			title		= #{archiveTitle},			content		= #{content},			feeValue	= #{feeValue} 			security 	= #{security},			subjectType     = #{subjectType},			gradeType 	= #{gradeType},			gather 		= #{gather},			archiveType = #{archiveType},			keyWordName = #{keyWordName}		where archivesKey = #{archiveKey}	</update>

• 定义mybatis删除数据表记录的方式

<delete id="deleteArchive" parametertype="String">	delete from  title 	where spaArchivesKey = #{archiveKey}</delete>