202201080136 qijun

C09-MyBatis-XML-Demo/src/main/java/edu/qijun/mapper/AccountMapper.java

@@ -4,10 +4,11 @@ import edu.qijun.pojo.Account;
 import java.util.List;
 import edu.qijun.pojo.Student;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 @Mapper
 public interface AccountMapper {
 
-    List<Student>getStudents();
-    void insertAccount(Account account);
+    List<Student> getStudents();
+    void insertAccount(Account account); // 添加了 @Param 注解
 }

C09-MyBatis-XML-Demo/src/main/java/edu/qijun/mapper/ScoreMapper.java

@@ -10,6 +10,6 @@ public interface ScoreMapper {
 
     void deleteById(Integer id); // 修正了方法名
 
-    void deleteByIds(@Param("ids") List<Integer> ids);
+    void deleteByIds(List<Integer> ids);
     // 假设你想要删除多个ID，通常复数形式更合适
 }

C09-MyBatis-XML-Demo/src/main/java/edu/qijun/mapper/StudentMapper.java

@@ -3,7 +3,7 @@ package edu.qijun.mapper;
 import edu.qijun.pojo.Student;
 
 import org.apache.ibatis.annotations.Mapper;
-
+import org.apache.ibatis.annotations.Param;
 import java.util.List;
 
 
@@ -13,10 +13,10 @@ public interface StudentMapper {
     List<Student> getAll();
 
 
-    Student getById(String id);
+    Student getById(Integer id);
 
 
-    Student getByCondition(Integer len,Integer gender);
+    List<Student> getByCondition(Integer len,Integer gender);
 
     void insertStudent(Student student);
 

C09-MyBatis-XML-Demo/src/main/java/edu/qijun/pojo/Student.java

@@ -12,6 +12,7 @@ public class Student extends BaseEntity{
    private String name;
    private  Integer gender;
    private LocalDate birthday;
+   //private Integer createBy;
    private LocalDateTime updateTime;
 
 

C09-MyBatis-XML-Demo/src/main/resources/Mapper/AccountMapper.xml

@@ -6,11 +6,12 @@
     <select id="selectAccount" resultType="Account">
         SELECT * FROM account WHERE id = #{id}
     </select>
-    <insert id="insertAccount" useGeneratedKeys="true" keyProperty="id" parameterType="edu.qijun.pojo.Account">
+    <insert id="insertAccount" useGeneratedKeys="true" keyProperty="id">
         insert into account(account, password, role, create_by, create_time)
         values(#{account}, #{password}, #{role}, #{createBy}, #{createTime})
     </insert>
 
+
     <select id="getStudents" resultType="edu.qijun.pojo.Student">
         SELECT id, name, age, create_by, create_time
         FROM student

C09-MyBatis-XML-Demo/src/main/resources/Mapper/ScoreMapper.xml

@@ -8,10 +8,8 @@
         values(#{studentId}, #{courseId}, #{score}, #{createBy}, #{createTime})
     </insert>
 
-    <insert id="insertStudent" useGeneratedKeys="true" keyProperty="id">
-        insert into student (name, gender, birthday, create_by, create_time)
-        values (#{name}, #{gender}, #{birthday}, #{createBy}, #{createTime})
-    </insert>
+
+
 
 
     <delete id="deleteById">
@@ -21,7 +19,7 @@
     <delete id="deleteByIds">
         DELETE FROM score WHERE id IN
         <foreach collection="ids" item="id" open="(" separator="," close=")">
-            #{ids}
+            #{id}
         </foreach>
     </delete>
 </mapper>

C09-MyBatis-XML-Demo/src/main/resources/Mapper/StudentMapper.xml

@@ -9,15 +9,18 @@
     <update id="update">
         update student
         <set>
-            <if test="name!=null">name=#{name},</if>
-            <if test="gender!=null">gender=#{gender},</if>
-            <if test="birthday!=null">birthday=#{birthday},</if>
-            <if test="updateBy!=null">update_by=#{updateBy},</if>
-            <if test="updateTime!=null">update_time=#{updateTime}</if>
+            <if test="name != null">name=#{name},</if>
+            <if test="gender != null">gender=#{gender},</if>
+            <if test="birthday != null">birthday=#{birthday},</if>
+            <if test="updateBy != null">update_by=#{updateBy},</if>
+            <if test="updateTime != null">update_time=#{updateTime}</if>
         </set>
-        where id=#{id}
+        <where>
+            id=#{id}
+        </where>
     </update>
 
+
     <select id="getAll" resultType="edu.qijun.pojo.Student">
         <include refid="commonSelect"></include>
 
@@ -31,16 +34,19 @@
     <select id="getByCondition" resultType="edu.qijun.pojo.Student">
         <include refid="commonSelect"></include>
         <where>
-        <if test="len!=null">CHAR_LENGTH(student.name)=#{len}</if>
-        <if test="gender!=null">and gender =#{gender}</if>
+            <if test="len!=null">CHAR_LENGTH(student.name)=#{len}</if>
+            <if test="gender!=null">and gender =#{gender}</if>
         </where>
     </select>
 
     <insert id="insertStudent">
-        insert into student (id, name, gender, birthday, create_by, create_time)
-        values (#{id}, #{name}, #{gender}, #{birthday}, #{createBy}, #{createTime})
+        insert into student(id, name, gender, birthday, create_by, create_time)
+        values(#{id}, #{name}, #{gender}, #{birthday}, #{createBy}, #{createTime})
     </insert>
 
 
+
+
+
 </mapper>