Mybatis---框架搭建---增删查改
下载依赖网址
https://search.maven.org/
pom.xml
4.0.0
cn.kgc
mybatis-demo
1.0-SNAPSHOT
mybatis-demo
http://www.example.com
UTF-8
1.7
1.7
junit
junit
4.11
test
org.mybatis
mybatis
3.5.2
mysql
mysql-connector-java
8.0.17
org.projectlombok
lombok
1.18.8
log4j
log4j
1.2.17
test
maven-clean-plugin
3.1.0
maven-resources-plugin
3.0.2
maven-compiler-plugin
3.8.0
maven-surefire-plugin
2.22.1
maven-jar-plugin
3.0.2
maven-install-plugin
2.5.2
maven-deploy-plugin
2.8.2
maven-site-plugin
3.7.1
maven-project-info-reports-plugin
3.0.0
main目录下新建resources目录，resources目录下新建mappers目录
mappers目录下
UserMapper.xml（映射文件，写sql语句的地方）
INSERT INTO smbms_user(userCode,userName,userPassword)VALUES(#{userCode},#{userName},#{userPassword})
update smbms_user set userCode = #{userCode},userName = #{userName},userPassword = #{userPassword} where id = #{id}
delete from smbms_user where id=#{id}
update smbms_user
userCode = #{userCode},
userName = #{userName},
userPassword = #{userPassword},
where id = #{id}
main根目录下
db.properties
driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false
username=root
password=123456
log4j.properties
log4j.rootLogger=DEBUG,CONSOLE,file
#log4j.rootLogger=ERROR,ROLLING_FILE
log4j.logger.cn.kgc.dao=debug
log4j.logger.com.ibatis=debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
log4j.logger.java.sql.Connection=debug
log4j.logger.java.sql.Statement=debug
log4j.logger.java.sql.PreparedStatement=debug
log4j.logger.java.sql.ResultSet=debug
log4j.logger.org.tuckey.web.filters.urlrewrite.UrlRewriteFilter=debug
######################################################################################
# Console Appender \u65e5\u5fd7\u5728\u63a7\u5236\u8f93\u51fa\u914d\u7f6e
######################################################################################
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=error
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern= [%p] %d %c - %m%n
######################################################################################
# DailyRolling File \u6bcf\u5929\u4ea7\u751f\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\uff0c\u6587\u4ef6\u540d\u683c\u5f0f:log2009-09-11
######################################################################################
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.DatePattern=yyyy-MM-dd
log4j.appender.file.File=log.log
log4j.appender.file.Append=true
log4j.appender.file.Threshold=error
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-M-d HH:mm:ss}%x[%5p](%F:%L) %m%n
log4j.logger.com.opensymphony.xwork2=error
mybatis-config.xml
pojo目录下的类加入(setting–plugins需导入lombok)
@Data
@AllArgsConstructor
@NoArgsConstructor
dao目录下
UserMapper接口
package cn.kgc.dao;
import cn.kgc.pojo.Bill;
import cn.kgc.pojo.Provider;
import cn.kgc.pojo.User;
import org.apache.ibatis.annotations.Param;
import java.util.List;
import java.util.Map;
public interface UserMapper {
//查询
List getUserList();
//根据id查询User对象
User findById(int id);
//根据姓名 模糊查询
List findByName(String userName);
//增加
int insert(@Param(value = "userCode")String userCode,@Param(value = "userName")String userName,@Param(value = "userPassword")String userPassword);
//修改
int update(@Param(value = "userCode")String userCode,@Param(value = "userName")String userName,@Param(value = "userPassword")String userPassword,@Param(value = "id")long id);
//增加
int delete(long id);
//查询 对象入参
List getUserListByUser(User user);
//查询 Map入参
List getUserListByMap(Map userMap);
//查询
List getUserList2();
//association 一对一
User getUserByRoleId(Integer userRole);
//collection 一对多
ListgetUserListByRoleId(Integer userRole);
//模糊查询 根据id 一对多查询
List findBillByProName(String ProName);
//模糊查询 根据id 一对多查询 if-trim判断参数
List findBillByProName2(@Param(value = "productName")String productName,@Param(value = "providerId")int providerId);
//修改 set---if 判断参数
int update2(User user);
//foreach 集合入参
ListfindListByRoleId_foreach_list(List userRoleList);
//分页显示
// int count();
ListgetUserListFen(@Param("from")Integer currentPageNo,
@Param("pageSize")Integer pageSize,
@Param("userName")String userName,
@Param("userRole")Integer userRole
);
}
until目录下
MybatisUtil （java文件）
package cn.kgc.until;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import java.io.IOException;
import java.io.InputStream;
public class MybatisUtil {
private static SqlSessionFactory sqlSessionFactory;
// 静态代码块，sqlSessionFactory只创建一次
static {
try {
InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);
} catch (IOException e) {
e.printStackTrace();
}
}
// 创建sqlSession false：关闭自动提交。需手动提交
public static SqlSession createSqlSession(){
return sqlSessionFactory.openSession(true);
}
//关闭sqlSession
public static void closeSqlSession(SqlSession sqlSession){
if (null != sqlSession){
sqlSession.close();
}
}
}
测试类
package cn.kgc;
import cn.kgc.dao.UserMapper;
import cn.kgc.pojo.Bill;
import cn.kgc.pojo.Provider;
import cn.kgc.pojo.Role;
import cn.kgc.pojo.User;
import cn.kgc.until.MybatisUtil;
import jdk.nashorn.internal.objects.annotations.Constructor;
import lombok.AllArgsConstructor;
import lombok.Data;
import org.apache.ibatis.annotations.ConstructorArgs;
import org.apache.ibatis.session.SqlSession;
import org.apache.log4j.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.junit.Assert.assertTrue;
public class AppTest {
private static Logger logger=Logger.getLogger(AppTest.class);
private SqlSession sqlSession;
private UserMapper mapper;
@Test
public void shouldAnswerWithTrue()
{
assertTrue( true );
}
@Before
public void init(){
sqlSession = MybatisUtil.createSqlSession();
mapper = sqlSession.getMapper(UserMapper.class);
}
@After
public void closeSqlSession(){
MybatisUtil.closeSqlSession(sqlSession);
}
@Test
public void getUserListTest(){
//查询
List userList = mapper.getUserList();
for (User user:userList) {
System.out.println("===="+user.toString());
}
}
@Test
public void findById(){
//根据id查询
User byId = mapper.findById(11);
System.out.println("测试========"+byId);
}
@Test
public void findByName(){
//根据姓名模糊查询
List list = mapper.findByName("少");
for (User user:list) {
System.out.println("===="+user.toString());
}
}
@Test
public void add(){
//增加
int j = mapper.insert("123", "少爷", "123");
System.out.println("j============"+j);
}
@Test
public void update(){
//修改
int i = mapper.update("456", "少爷", "456", 16);
System.out.println("i=============="+i);
}
@Test
public void delete(){
//删除
int i = mapper.delete(16);
System.out.println("i=============="+i);
}
@Test
public void getUserListByUser(){
//查询 对象入参
User user=new User();
user.setUserName("赵");
List list = mapper.getUserListByUser(user);
for (User user2:list) {
System.out.println("===="+user2.toString());
}
}
@Test
public void getUserListByMap(){
//查询 Map入参
Map userMap=new HashMap();
userMap.put("uName","赵");
List list = mapper.getUserListByMap(userMap);
for (User user:list) {
System.out.println("===="+user.toString());
}
}
@Test
public void getUserList2Test(){
//查询
List userList = mapper.getUserList2();
for (User user:userList) {
System.out.println("===="+user.toString());
}
}
@Test
public void getUserListByRoled(){
//查询 association 一对一
User userListByRoled = mapper.getUserByRoleId(1);
System.out.println("===="+userListByRoled);
}
@Test
public void getUserListByRoleId(){
//查询 collection 一对多
List userListByRoleId = mapper.getUserListByRoleId(2);
for(User user:userListByRoleId){
for(Role role:user.getList()){
System.out.println("===="+user.getUserName()+" "+role.getRoleName());
}
}
}
@Test
public void findBillByProName2(){
//模糊查询 根据id 查询
List billList = mapper.findBillByProName2("大",3);
System.out.println("订单编码"+" "+"商品名称"+" "+"供应商编码"+" "+"供应商名称"+" "+"供应商联系人"+" "+"联系电话"+" "+"订单金额"+" "+"是否付款");
for(Bill bill:billList){
for(Provider provider:bill.getListProvider()){
System.out.println(bill.getBillCode()+bill.getProductName()+provider.getProCode()+provider.getProName()+provider.getProContact()+provider.getProPhone()+bill.getTotalPrice()+bill.getIsPayment());
}
}
}
@Test
public void update2(){
//修改
User user=new User();
user.setId(14);
user.setUserName("公子");
user.setUserPassword("789");
int i = mapper.update2(user);
System.out.println("i=============="+i);
}
@Test
public void findListByRoleId(){
//foreach 集合入参
Listlist=new ArrayList<>();
ListroleList=new ArrayList<>();
roleList.add(2);
roleList.add(3);
List listByRoleId = mapper.findListByRoleId_foreach_list(roleList);
for(User user:listByRoleId){
System.out.println("集合======="+user.getUserName()+" "+user.getUserRole());
}
}
@Test
public void getUserListFen(){
//分页显示
String userName="";
Integer roleId=null;
Integer pageSize=3;
Integer currentPageNo=0;
List userListFen = mapper.getUserListFen(currentPageNo, pageSize, userName, roleId);
for(User user:userListFen){
System.out.println("分页显示====="+user.getUserName()+" "+user.getUserRole());
}
}
}
