Mybatis异常There is no getter for property named 'XXX' in 'class java.lang.String'

异常There is no getter for property named 'XXX' in 'class java.lang.String'"/>

Mybatis异常There is no getter for property named 'XXX' in 'class java.lang.String'

当入参为 string类型时 (包括java.lang.String.) 

我们使用#{xxx}引入参数.会抛异常There is no getter for property named 'XXX' in 'class java.lang.String'

解决方法一：

报错代码如下：

<select id="getUserId" resultType="java.lang.Integer">selectid from user where1=1<if test="userName !=null">and user_name=#{userName}</if>and yn=1</select>

修正如下：

<select id="getUserId" resultType="java.lang.Integer">selectid from user where1=1<if test="_parameter !=null">and user_name=#{userName}</if>and yn=1</select>

解决方法二:

修改前：

public int getUserId(String userName);

修改后：

public int getUserId(@Param(value="userName") String userName);