第一步：檢查相應的是否構建了spring的容器環境

UserMapper  userMapper = context.getBean(UserMapper.class);或者寫一個基類直接繼承  例如：最後最後測試相應的dao:如果還有問題就是xxxMapper.xml檔案的問題第一步：檢查xxxMapper.xml檔案的名稱是否和xxxMapper.java 在同一個目錄下（同一個包下）第二步：檢查xxx.xml 中的namespace是否和xxxMapper.java 的包路徑.xxxMapper相同第三步：檢查介面中對應的方法的輸入型別和輸出型別是否和xxxMapper.xml中的一致例如我的AdminInfoMapper.xml：<insert id="addAdmin" parameterType="com.kk.pojo.AdminInfo" >
   
   insert into admin_info
    <trim prefix="(" suffix=")" suffixOverrides=",">
     <if test="name!=null and name !=''">
      name,
     </if>
     <if test="sex!=null and sex !=''">
      sex,
     </if>
     <if test="age!=null and age !=''">
      age,
     </if>
     <if test="address!=null and address !=''">
      address,
     </if>
     <if test="idCard!=null and idCard !=''">
      id_card,
     </if>
     <if test="phone!=null and phone !=''">
      phone,
     </if>
     <if test="picture!=null and picture !=''">
      picture,
     </if>
     <if test="workplace!=null and workplace !=''">
      workplace,
     </if>
     <if test="createtime!=null and createtime !=''">
      createtime,
     </if>
     <if test="updatetime!=null and updatetime !=''">
      updatetime,
     </if>
    </trim>
    
        <trim prefix="values (" suffix=")" suffixOverrides=",">
         <if test="name!=null and name !=''">
          #{name},
         </if>
         <if test="sex!=null and sex !=''">
      #{sex},
     </if>
     <if test="age!=null and age !=''">
      #{age},
     </if>
     <if test="address!=null and address !=''">
      #{address},
     </if>
     <if test="idCard!=null and idCard !=''">
      #{idCard},
     </if>
     <if test="phone!=null and phone !=''">
      #{name},
     </if>
     <if test="picture!=null and picture !=''">
      #{picture},
     </if>
     <if test="workplace!=null and workplace !=''">
      #{workplace},
     </if>
     <if test="createtime!=null and createtime !=''">
      #{createtime},
     </if>
     <if test="updatetime!=null and updatetime !=''">
      #{updatetime},
     </if>
        </trim> 
 </insert>
按照我的方法問題基本會解決