mybatis 模糊查询和<![CDATA[ ]]>的作用

1. sql中字符串拼接

   SELECT * FROM tableName WHERE name LIKE CONCAT(CONCAT('%', #{text}), '%');

 

2. 使用 ${...} 代替 #{...} (不能防止sql注入 #{}---> 可以防止sql注入的问题)

   SELECT * FROM tableName WHERE name LIKE '%${text}%'; 

 

3. 程序中拼接

   Java

   // or String searchText = "%" + text + "%";

   String searchText = new StringBuilder("%").append(text).append("%").toString();

   parameterMap.put("text", searchText);

 

   SqlMap.xml

   SELECT * FROM tableName WHERE name LIKE #{text};


<![CDATA[ ]]> 标记避免Sql中与xml规范相冲突的字符对xml映射文件的合法性造成影响

如:<![CDATA[price_from >= #{price_from}]]>


转自:http://yzfdiligence24.blog.163.com/blog/static/2145070342013101911216900/

<insert id="insertUser" parameterType="SysUser" useGeneratedKeys="true" keyProperty="userId"> insert into sys_user( <if test="userId != null and userId != 0">user_id,</if> <if test="deptId != null and deptId != 0">dept_id,</if> <if test="userName != null and userName != ''">user_name,</if> <if test="nickName != null and nickName != ''">nick_name,</if> <if test="email != null and email != ''">email,</if> <if test="avatar != null and avatar != ''">avatar,</if> <if test="phonenumber != null and phonenumber != ''">phonenumber,</if> <if test="sex != null and sex != ''">sex,</if> <if test="password != null and password != ''">password,</if> <if test="status != null and status != ''">status,</if> <if test="createBy != null and createBy != ''">create_by,</if> <if test="remark != null and remark != ''">remark,</if> create_time )values( <if test="userId != null and userId != ''">#{userId},</if> <if test="deptId != null and deptId != ''">#{deptId},</if> <if test="userName != null and userName != ''">#{userName},</if> <if test="nickName != null and nickName != ''">#{nickName},</if> <if test="email != null and email != ''">#{email},</if> <if test="avatar != null and avatar != ''">#{avatar},</if> <if test="phonenumber != null and phonenumber != ''">#{phonenumber},</if> <if test="sex != null and sex != ''">#{sex},</if> <if test="password != null and password != ''">#{password},</if> <if test="status != null and status != ''">#{status},</if> <if test="createBy != null and createBy != ''">#{createBy},</if> <if test="remark != null and remark != ''">#{remark},</if> sysdate() ) </insert>中的 sysdate()的原理是什么
最新发布
07-18
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