public List<XXBean> getXXBeanList(String xxCode);  <select id="getXXXBeanList" parameterType="java.lang.String" resultType="XXBean">select t.* from tableName t where t.id= #{id}  </select>  其中方法名和ID一致，#{}中的参数名与方法中的参数名一直， 我这里采用的是XXXBean是采用的短名字,select 后的字段列表要和bean中的属性名一致， 如果不一致的可以用 as 来补充。

public List<XXXBean> getXXXBeanList(String xxId, String xxCode);  <select id="getXXXBeanList" resultType="XXBean">select t.* from tableName where id = #{0} and name = #{1}  </select>  由于是多参数那么就不能使用parameterType， 改用#｛index｝是第几个就用第几个的索引，索引从0开始

public List<XXXBean> getXXXBeanList(HashMap map);  <select id="getXXXBeanList" parameterType="hashmap" resultType="XXBean">select 字段... from XXX where id=#{xxId} code = #{xxCode}  </select>  其中hashmap是mybatis自己配置好的直接使用就行。map中key的名字是那个就在#{}使用那个，map如何封装就不用了我说了吧。 

public List<XXXBean> getXXXBeanList(List<String> list);  <select id="getXXXBeanList" resultType="XXBean">select 字段... from XXX where id in<foreach item="item" index="index" collection="list" open="(" separator="," close=")">  #{item}  </foreach>
</select>  foreach 最后的效果是select 字段... from XXX where id in ('1','2','3','4') 

例子：public AddrInfo getAddrInfo(@Param("corpId")int corpId, @Param("addrId")int addrId);xml配置这样写：<select id="getAddrInfo"  resultMap="com.xxx.xxx.AddrInfo">SELECT * FROM addr__info 　　　　where addr_id=#{addrId} and corp_id=#{corpId}
</select>以前在<select>语句中要带parameterType的，现在可以不要这样写。

List<String> list_3 = new ArrayList<String>();Map<String, Object> map2 = new HashMap<String, Object>();
list.add("1");

list.add("2");

map2.put("list", list); //网址id

map2.put("siteTag", "0");//网址类型

public List<SysWeb> getSysInfo(Map<String, Object> map2) {return getSqlSession().selectList("sysweb.getSysInfo", map2);
}

<select id="getSysInfo" parameterType="java.util.Map" resultType="SysWeb">select t.sysSiteId, t.siteName, t1.mzNum as siteTagNum, t1.mzName as siteTag, t.url, t.iconPathfrom TD_WEB_SYSSITE tleft join TD_MZ_MZDY t1 on t1.mzNum = t.siteTag and t1.mzType = 10WHERE t.siteTag = #{siteTag } and t.sysSiteId not in <foreach collection="list" item="item" index="index" open="(" close=")" separator=",">#{item}</foreach></select>