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 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE mapper
 3 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 4 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 5 <mapper namespace="Customer">
 6
 7
 8     <select id="findCustomerById" parameterType="int" resultType="org.mybatis.model.Customer">
 9         select * from customer where id=#{id}<!-- #{}表示占位符 -->
10     </select>
11
12     <select id="findCustomerById2" parameterType="int" resultType="Customer">
13         select * from customer where id=#{id}
14     </select>
15
16     <select id="findCustomerByName" parameterType="String" resultType="Customer">
17         select * from customer where name like ‘%${value}%‘<!-- ${}是一种拼接符，表示不加单引号等任何修饰，不能防止sql注入 -->
18     </select>
19
20     <select id="findCustomerByName2" parameterType="String" resultType="Customer"><!-- 对上一种方式的改进 -->
21         select * from customer where name like ‘%‘||#{value}||‘%‘
22     </select>
23
24     <insert id="insertCustomer" parameterType="Customer">
25         <selectKey keyProperty="id" order="BEFORE" resultType="int"><!-- 插入前，查询最大ID，并赋值给当前对象 -->
26             select nvl(max(id),0)+1 from customer
27         </selectKey>
28         insert into customer(id,name,birthday,sex,address) values (#{id},#{name},#{birthday},#{sex},#{address})
29     </insert>
30
31     <insert id="insertCustomer2" parameterType="Customer">
32         insert into customer(id,name,birthday,sex,address) values (#{id},#{name},#{birthday},#{sex},#{address})
33         <selectKey keyProperty="id" order="AFTER" resultType="int"><!-- 插入后，查询最大ID，并赋值给当前对象 -->
34             select max(id) from customer
35         </selectKey>
36     </insert>
37
38     <delete id="deleteCustomer" parameterType="int">
39         delete from customer where id=#{id}
40     </delete>
41
42     <update id="updateCustomer" parameterType="Customer">
43         update customer set name=#{name},sex=#{sex},birthday=#{birthday},address=#{address} where id=#{id}
44     </update>
45
46 </mapper>

阿萨德发士大夫11111111
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111111111111111111111111111

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="Customer">

    <select id="findCustomerById" parameterType="int" resultType="org.mybatis.model.Customer">
        select * from customer where id=#{id}<!-- #{}表示占位符 -->
    </select>

    <select id="findCustomerById2" parameterType="int" resultType="Customer">
        select * from customer where id=#{id}
    </select>

    <select id="findCustomerByName" parameterType="String" resultType="Customer">
        select * from customer where name like ‘%${value}%‘<!-- ${}是一种拼接符，表示不加单引号等任何修饰，不能防止sql注入 -->
    </select>

    <select id="findCustomerByName2" parameterType="String" resultType="Customer"><!-- 对上一种方式的改进 -->
        select * from customer where name like ‘%‘||#{value}||‘%‘
    </select>

    <insert id="insertCustomer" parameterType="Customer">
        <selectKey keyProperty="id" order="BEFORE" resultType="int"><!-- 插入前，查询最大ID，并赋值给当前对象 -->
            select nvl(max(id),0)+1 from customer
        </selectKey>
        insert into customer(id,name,birthday,sex,address) values (#{id},#{name},#{birthday},#{sex},#{address})
    </insert>

    <insert id="insertCustomer2" parameterType="Customer">
        insert into customer(id,name,birthday,sex,address) values (#{id},#{name},#{birthday},#{sex},#{address})
        <selectKey keyProperty="id" order="AFTER" resultType="int"><!-- 插入后，查询最大ID，并赋值给当前对象 -->
            select max(id) from customer
        </selectKey>
    </insert>

    <delete id="deleteCustomer" parameterType="int">
        delete from customer where id=#{id}
    </delete>

    <update id="updateCustomer" parameterType="Customer">
        update customer set name=#{name},sex=#{sex},birthday=#{birthday},address=#{address} where id=#{id}
    </update>

</mapper>