<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.mybatis.inter.IStudentOperation"><!-- 自定義resultMap --><resultMap type="Student" id="resultListStudent"><id column="id" property="id"/><result column="name" property="name"/><result column="password" property="password"/></resultMap><select id="getStudentById" parameterType="int" resultType="Student">select * from student where id=#{id}</select><select id="getAllStudents" resultMap="resultListStudent">select * from student</select><insert id="addStudent" parameterType="Student" useGeneratedKeys="true" keyProperty="id">insert into student(name,password)values(#{name},#{password})</insert><update id="updateStudent" parameterType="Student">update student set name=#{name},password=#{password}where id=#{id}</update><delete id="deleteStudent" parameterType="int">delete from student where id=#{id}</delete> </mapper>

　　

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration><!-- 命名別名 --><typeAliases><typeAlias alias="Student" type="com.mybatis.bean.Student"/></typeAliases><environments default="development"><environment id="development"><transactionManager type="JDBC" /><dataSource type="POOLED"><property name="driver" value="com.mysql.jdbc.Driver" /><property name="url" value="jdbc:mysql://127.0.0.1:3306/test" /><property name="username" value="root" /><property name="password" value="root" /></dataSource></environment></environments><mappers><mapper resource="com/mybatis/bean/Student.xml" /></mappers> </configuration>

　　

package com.mybatis.bean;public class Student {private int id;private String name;private String password;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

　　

package com.mybatis.util;import java.io.IOException; import java.io.Reader;import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder;public class MybatisUtil {private static SqlSessionFactory sqlSessionFactory;public static SqlSessionFactory getSqlSessionFactory() throws IOException {if (sqlSessionFactory == null) {String resource = "mybatis-config.xml";Reader reader = Resources.getResourceAsReader(resource);sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);}return sqlSessionFactory;} }

　　

package com.mybatis.inter;import java.util.List;import com.mybatis.bean.Student;public interface IStudentOperation {public Student getStudentById(int id);public List<Student> getAllStudents();public void addStudent(Student student);public void updateStudent(Student student);public void deleteStudent(int id); }

　　

package com.mybatis.test;import java.io.IOException; import java.util.List;import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory;import com.mybatis.bean.Student; import com.mybatis.inter.IStudentOperation; import com.mybatis.util.MybatisUtil;public class Test {public static void main(String[] args) {SqlSessionFactory factory=null;SqlSession session=null;try {factory=MybatisUtil.getSqlSessionFactory();session=factory.openSession();IStudentOperation studentOperation=session.getMapper(IStudentOperation.class);/*** 單條記錄查詢*/ // Student student = studentOperation.getStudentById(1); // System.out.println("student name :"+student.getName()); // System.out.println("student password :"+student.getPassword());/*** 多條記錄查詢，重寫resultMap*/ // List<Student> allStudents = studentOperation.getAllStudents(); // if(allStudents != null && allStudents.size() >0) { // for(Student student:allStudents) { // System.out.println("student name :"+student.getName()); // System.out.println("student password :"+student.getPassword()); // } // }/*** 增加數據，一定要提交 */ // Student student=new Student(); // student.setName("ddd"); // student.setPassword("456"); // studentOperation.addStudent(student); // session.commit();//必須要提交事務，否則將不會記錄到數據庫中 // System.err.println(student.getId());/*** 更新數據，一定要提交*/ // Student student = studentOperation.getStudentById(1); // student.setName("zcs"); // student.setPassword("111"); // studentOperation.updateStudent(student); // session.commit();/*** 刪除數據,一定要提交*/ // studentOperation.deleteStudent(1); // session.commit();} catch (IOException e) {e.printStackTrace();}}}

　　

轉載于:https://www.cnblogs.com/zcs201093189/p/4843639.html

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