mybatis完美實(shí)戰(zhàn)教程
來(lái)源：懂視網(wǎng)
責(zé)編：小采
時(shí)間：2020-11-09 14:09:40
mybatis完美實(shí)戰(zhàn)教程
mybatis完美實(shí)戰(zhàn)教程:寫(xiě)在這個(gè)系列前面的話: 以前曾經(jīng)用過(guò)ibatis,這是mybatis的前身，當(dāng)時(shí)在做項(xiàng)目時(shí)，感覺(jué)很不錯(cuò)，比hibernate靈活。性能也比hibernate好。而且也比較輕量級(jí)，因?yàn)楫?dāng)時(shí)在項(xiàng)目中，沒(méi)來(lái)的及做很很多筆記。后來(lái)項(xiàng)目結(jié)束了，我也沒(méi)寫(xiě)總結(jié)文檔。已經(jīng)過(guò)去好久了。但最
導(dǎo)讀 mybatis完美實(shí)戰(zhàn)教程:寫(xiě)在這個(gè)系列前面的話: 以前曾經(jīng)用過(guò)ibatis,這是mybatis的前身，當(dāng)時(shí)在做項(xiàng)目時(shí)，感覺(jué)很不錯(cuò)，比hibernate靈活。性能也比hibernate好。而且也比較輕量級(jí)，因?yàn)楫?dāng)時(shí)在項(xiàng)目中，沒(méi)來(lái)的及做很很多筆記。后來(lái)項(xiàng)目結(jié)束了，我也沒(méi)寫(xiě)總結(jié)文檔。已經(jīng)過(guò)去好久了。但最
寫(xiě)在這個(gè)系列前面的話: 以前曾經(jīng)用過(guò)ibatis,這是mybatis的前身，當(dāng)時(shí)在做項(xiàng)目時(shí)，感覺(jué)很不錯(cuò)，比hibernate靈活。性能也比hibernate好。而且也比較輕量級(jí)，因?yàn)楫?dāng)時(shí)在項(xiàng)目中，沒(méi)來(lái)的及做很很多筆記。后來(lái)項(xiàng)目結(jié)束了，我也沒(méi)寫(xiě)總結(jié)文檔。已經(jīng)過(guò)去好久了。但最
寫(xiě)在這個(gè)系列前面的話:
以前曾經(jīng)用過(guò)ibatis,這是mybatis的前身，當(dāng)時(shí)在做項(xiàng)目時(shí)，感覺(jué)很不錯(cuò)，比hibernate靈活。性能也比hibernate好。而且也比較輕量級(jí)，因?yàn)楫?dāng)時(shí)在項(xiàng)目中，沒(méi)來(lái)的及做很很多筆記。后來(lái)項(xiàng)目結(jié)束了，我也沒(méi)寫(xiě)總結(jié)文檔。已經(jīng)過(guò)去好久了。但最近突然又對(duì)這個(gè)ORM 工具感興趣。因?yàn)榻酉聛?lái)自己的項(xiàng)目中很有可能采用這個(gè)ORM工具。所以在此重新溫習(xí)了一下 mybatis, 因此就有了這個(gè)系列的 mybatis 教程.
什么是mybatis
MyBatis是支持普通SQL查詢，存儲(chǔ)過(guò)程和高級(jí)映射的優(yōu)秀持久層框架。MyBatis消除了幾乎所有的JDBC代碼和參數(shù)的手工設(shè)置以及結(jié)果集的檢索。MyBatis使用簡(jiǎn)單的XML或注解用于配置和原始映射，將接口和Java的POJOs（Plan Old Java Objects，普通的Java對(duì)象）映射成數(shù)據(jù)庫(kù)中的記錄.
orm工具的基本思想
無(wú)論是用過(guò)的hibernate,mybatis,你都可以法相他們有一個(gè)共同點(diǎn)：
1. 從配置文件(通常是XML配置文件中)得到 sessionfactory.
2. 由sessionfactory 產(chǎn)生 session
3. 在session 中完成對(duì)數(shù)據(jù)的增刪改查和事務(wù)提交等.
4. 在用完之后關(guān)閉session 。
5. 在java 對(duì)象和 數(shù)據(jù)庫(kù)之間有做mapping 的配置文件，也通常是xml 文件。
mybatis實(shí)戰(zhàn)教程(mybatis in action)之一：開(kāi)發(fā)環(huán)境搭建
mybatis 的開(kāi)發(fā)環(huán)境搭建，選擇: eclipse j2ee 版本，mysql 5.1 ,jdk 1.7,mybatis3.2.0.jar包。這些軟件工具均可以到各自的官方網(wǎng)站上下載。
< ?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>
< /configuration>
package com.yihaomen.mybatis.model;
public class User {
private int id;
private String userName;
private String userAge;
private String userAddress;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserAge() {
return userAge;
}
public void setUserAge(String userAge) {
this.userAge = userAge;
}
public String getUserAddress() {
return userAddress;
}
public void setUserAddress(String userAddress) {
this.userAddress = userAddress;
}
}
< ?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="com.yihaomen.mybatis.models.UserMapper">
select * from `user` where id = #{id}
< /mapper>
package com.yihaomen.test;
import java.io.Reader;
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 com.yihaomen.mybatis.model.User;
public class Test {
private static SqlSessionFactory sqlSessionFactory;
private static Reader reader;
static{
try{
reader = Resources.getResourceAsReader("Configuration.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
}catch(Exception e){
e.printStackTrace();
}
}
public static SqlSessionFactory getSession(){
return sqlSessionFactory;
}
public static void main(String[] args) {
SqlSession session = sqlSessionFactory.openSession();
try {
User user = (User) session.selectOne("com.yihaomen.mybatis.models.UserMapper.selectUserByID", 1);
System.out.println(user.getUserAddress());
System.out.println(user.getUserName());
} finally {
session.close();
}
}
} mybatis實(shí)戰(zhàn)教程(mybatis in action)之二：以接口的方式編程
前面一章，已經(jīng)搭建好了eclipse,mybatis,mysql的環(huán)境，并且實(shí)現(xiàn)了一個(gè)簡(jiǎn)單的查詢。請(qǐng)注意，這種方式是用SqlSession實(shí)例來(lái)直接執(zhí)行已映射的SQL語(yǔ)句：
package com.yihaomen.mybatis.inter;
import com.yihaomen.mybatis.model.User;
public interface IUserOperation {
public User selectUserByID(int id);
}
public static void main(String[] args) {
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
User user = userOperation.selectUserByID(1);
System.out.println(user.getUserAddress());
System.out.println(user.getUserName());
} finally {
session.close();
}
} mybatis實(shí)戰(zhàn)教程(mybatis in action)之三:實(shí)現(xiàn)數(shù)據(jù)的增刪改查
< !-- 為了返回list 類型而定義的returnMap -->
< !-- 返回list 的select 語(yǔ)句，注意 resultMap 的值是指向前面定義好的 -->
select * from user where userName like #{userName}
public void getUserList(String userName){
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
List users = userOperation.selectUsers(userName);
for(User user:users){
System.out.println(user.getId()+":"+user.getUserName()+":"+user.getUserAddress());
}
} finally {
session.close();
}
}
public static void main(String[] args) {
Test testUser=new Test();
testUser.getUserList("%");
}
< !--執(zhí)行增加操作的SQL語(yǔ)句。id和parameterType分別與IUserOperation接口中的addUser方法的名字和參數(shù)類型一致。以#{name}的形式引用Student參數(shù)的name屬性，MyBatis將使用反射讀取Student參數(shù)的此屬性。#{name}中name大小寫(xiě)敏感。引用其他的gender等屬性與此一致。seGeneratedKeys設(shè)置為"true"表明要MyBatis獲取由數(shù)據(jù)庫(kù)自動(dòng)生成的主鍵；keyProperty="id"指定把獲取到的主鍵值注入到Student的id屬性-->
insert into user(userName,userAge,userAddress)
values(#{userName},#{userAge},#{userAddress})
*/
public void addUser(){
User user=new User();
user.setUserAddress("人民廣場(chǎng)");
user.setUserName("飛鳥(niǎo)");
user.setUserAge(80);
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
userOperation.addUser(user);
session.commit();
System.out.println("當(dāng)前增加的用戶 id為:"+user.getId());
} finally {
session.close();
}
}
update user set userName=#{userName},userAge=#{userAge},userAddress=#{userAddress} where id=#{id}
public void updateUser(){
//先得到用戶,然后修改，提交。
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
User user = userOperation.selectUserByID(4);
user.setUserAddress("原來(lái)是魔都的浦東創(chuàng)新園區(qū)");
userOperation.updateUser(user);
session.commit();
} finally {
session.close();
}
}
delete from user where id=#{id}
* @param id
*/
public void deleteUser(int id){
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
userOperation.deleteUser(id);
session.commit();
} finally {
session.close();
}
} mybatis實(shí)戰(zhàn)教程(mybatis in action)之四:實(shí)現(xiàn)關(guān)聯(lián)數(shù)據(jù)的查詢
Drop TABLE IF EXISTS `article`;
Create TABLE `article` (
`id` int(11) NOT NULL auto_increment,
`userid` int(11) NOT NULL,
`title` varchar(100) NOT NULL,
`content` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
-- ----------------------------
-- 添加幾條測(cè)試數(shù)據(jù)
-- ----------------------------
Insert INTO `article` VALUES ('1', '1', 'test_title', 'test_content');
Insert INTO `article` VALUES ('2', '1', 'test_title_2', 'test_content_2');
Insert INTO `article` VALUES ('3', '1', 'test_title_3', 'test_content_3');
Insert INTO `article` VALUES ('4', '1', 'test_title_4', 'test_content_4');
package com.yihaomen.mybatis.model;
public class Article {
private int id;
private User user;
private String title;
private String content;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
< !-- User 聯(lián)合文章進(jìn)行查詢 方法之一的配置 (多對(duì)一的方式) -->
< select id="getUserArticles" parameterType="int" resultMap="resultUserArticleList">
select user.id,user.userName,user.userAddress,article.id aid,article.title,article.content from user,article
where user.id=article.userid and user.id=#{id}
select user.id,user.userName,user.userAddress,article.id aid,article.title,article.content from user,article
where user.id=article.userid and user.id=#{id}
public void getUserArticles(int userid){
SqlSession session = sqlSessionFactory.openSession();
try {
IUserOperation userOperation=session.getMapper(IUserOperation.class);
List articles = userOperation.getUserArticles(userid);
for(Article article:articles){
System.out.println(article.getTitle()+":"+article.getContent()+
":作者是:"+article.getUser().getUserName()+":地址:"+
article.getUser().getUserAddress());
}
} finally {
session.close();
}
} mybatis實(shí)戰(zhàn)教程(mybatis in action)之五:與spring3集成(附源碼)
< !--本示例采用DBCP連接池，應(yīng)預(yù)先把DBCP的jar包復(fù)制到工程的lib目錄下。 -->
package com.yihaomen.test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.yihaomen.mybatis.inter.IUserOperation;
import com.yihaomen.mybatis.model.Article;
import com.yihaomen.mybatis.model.User;
public class MybatisSprintTest {
private static ApplicationContext ctx;
static
{
ctx = new ClassPathXmlApplicationContext("config/applicationContext.xml");
}
public static void main(String[] args)
{
IUserOperation mapper = (IUserOperation)ctx.getBean("userMapper");
//測(cè)試id=1的用戶查詢，根據(jù)數(shù)據(jù)庫(kù)中的情況，可以改成你自己的.
System.out.println("得到用戶id=1的用戶信息");
User user = mapper.selectUserByID(1);
System.out.println(user.getUserAddress());
//得到文章列表測(cè)試
System.out.println("得到用戶id為1的所有文章列表");
List articles = mapper.getUserArticles(1);
for(Article article:articles){
System.out.println(article.getContent()+"--"+article.getTitle());
}
}
}
mybatis實(shí)戰(zhàn)教程(mybatis in action)之六:與Spring MVC 的集成
contextConfigLocation
classpath*:config/applicationContext.xml
org.springframework.web.context.ContextLoaderListener
org.springframework.web.context.ContextCleanupListener
mvc-dispatcher
org.springframework.web.servlet.DispatcherServlet
1
mvc-dispatcher
/
/WEB-INF/pages/
.jsp
< /beans>
< !--本示例采用DBCP連接池，應(yīng)預(yù)先把DBCP的jar包復(fù)制到工程的lib目錄下。 -->
package com.yihaomen.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.yihaomen.inter.IUserOperation;
import com.yihaomen.model.Article;
@Controller
@RequestMapping("/article")
public class UserController {
@Autowired
IUserOperation userMapper;
@RequestMapping("/list")
public ModelAndView listall(HttpServletRequest request,HttpServletResponse response){
List articles=userMapper.getUserArticles(1);
ModelAndView mav=new ModelAndView("list");
mav.addObject("articles",articles);
return mav;
}
}
[code]
< c:forEach items="${articles}" var="item">
${item.id }--${item.title }--${item.content } mybatis實(shí)戰(zhàn)教程(mybatis in action)之七:實(shí)現(xiàn)mybatis分頁(yè)(源碼下載)
select user.id,user.userName,user.userAddress,article.id aid,article.title,article.content from user,article
where user.id=article.userid and user.id=#{id} limit #{offset},#{pagesize}
package com.yihaomen.util;
import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.xml.bind.PropertyException;
import org.apache.ibatis.builder.xml.dynamic.ForEachSqlNode;
import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.executor.ExecutorException;
import org.apache.ibatis.executor.statement.BaseStatementHandler;
import org.apache.ibatis.executor.statement.RoutingStatementHandler;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.ParameterMode;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.property.PropertyTokenizer;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandler;
import org.apache.ibatis.type.TypeHandlerRegistry;
@Intercepts({ @Signature(type = StatementHandler.class, method = "prepare", args = { Connection.class }) })
public class PagePlugin implements Interceptor {
private static String dialect = "";
private static String pageSqlId = "";
@SuppressWarnings("unchecked")
public Object intercept(Invocation ivk) throws Throwable {
if (ivk.getTarget() instanceof RoutingStatementHandler) {
RoutingStatementHandler statementHandler = (RoutingStatementHandler) ivk
.getTarget();
BaseStatementHandler delegate = (BaseStatementHandler) ReflectHelper
.getValueByFieldName(statementHandler, "delegate");
MappedStatement mappedStatement = (MappedStatement) ReflectHelper
.getValueByFieldName(delegate, "mappedStatement");
if (mappedStatement.getId().matches(pageSqlId)) {
BoundSql boundSql = delegate.getBoundSql();
Object parameterObject = boundSql.getParameterObject();
if (parameterObject == null) {
throw new NullPointerException("parameterObject error");
} else {
Connection connection = (Connection) ivk.getArgs()[0];
String sql = boundSql.getSql();
String countSql = "select count(0) from (" + sql + ") myCount";
System.out.println("總數(shù)sql 語(yǔ)句:"+countSql);
PreparedStatement countStmt = connection
.prepareStatement(countSql);
BoundSql countBS = new BoundSql(
mappedStatement.getConfiguration(), countSql,
boundSql.getParameterMappings(), parameterObject);
setParameters(countStmt, mappedStatement, countBS,
parameterObject);
ResultSet rs = countStmt.executeQuery();
int count = 0;
if (rs.next()) {
count = rs.getInt(1);
}
rs.close();
countStmt.close();
PageInfo page = null;
if (parameterObject instanceof PageInfo) {
page = (PageInfo) parameterObject;
page.setTotalResult(count);
} else if(parameterObject instanceof Map){
Map map = (Map)parameterObject;
page = (PageInfo)map.get("page");
if(page == null)
page = new PageInfo();
page.setTotalResult(count);
}else {
Field pageField = ReflectHelper.getFieldByFieldName(
parameterObject, "page");
if (pageField != null) {
page = (PageInfo) ReflectHelper.getValueByFieldName(
parameterObject, "page");
if (page == null)
page = new PageInfo();
page.setTotalResult(count);
ReflectHelper.setValueByFieldName(parameterObject,
"page", page);
} else {
throw new NoSuchFieldException(parameterObject
.getClass().getName());
}
}
String pageSql = generatePageSql(sql, page);
System.out.println("page sql:"+pageSql);
ReflectHelper.setValueByFieldName(boundSql, "sql", pageSql);
}
}
}
return ivk.proceed();
}
private void setParameters(PreparedStatement ps,
MappedStatement mappedStatement, BoundSql boundSql,
Object parameterObject) throws SQLException {
ErrorContext.instance().activity("setting parameters")
.object(mappedStatement.getParameterMap().getId());
List parameterMappings = boundSql
.getParameterMappings();
if (parameterMappings != null) {
Configuration configuration = mappedStatement.getConfiguration();
TypeHandlerRegistry typeHandlerRegistry = configuration
.getTypeHandlerRegistry();
MetaObject metaObject = parameterObject == null ? null
: configuration.newMetaObject(parameterObject);
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
PropertyTokenizer prop = new PropertyTokenizer(propertyName);
if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry
.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (propertyName
.startsWith(ForEachSqlNode.ITEM_PREFIX)
&& boundSql.hasAdditionalParameter(prop.getName())) {
value = boundSql.getAdditionalParameter(prop.getName());
if (value != null) {
value = configuration.newMetaObject(value)
.getValue(
propertyName.substring(prop
.getName().length()));
}
} else {
value = metaObject == null ? null : metaObject
.getValue(propertyName);
}
TypeHandler typeHandler = parameterMapping.getTypeHandler();
if (typeHandler == null) {
throw new ExecutorException(
"There was no TypeHandler found for parameter "
+ propertyName + " of statement "
+ mappedStatement.getId());
}
typeHandler.setParameter(ps, i + 1, value,
parameterMapping.getJdbcType());
}
}
}
}
private String generatePageSql(String sql, PageInfo page) {
if (page != null && (dialect !=null || !dialect.equals(""))) {
StringBuffer pageSql = new StringBuffer();
if ("mysql".equals(dialect)) {
pageSql.append(sql);
pageSql.append(" limit " + page.getCurrentResult() + ","
+ page.getShowCount());
} else if ("oracle".equals(dialect)) {
pageSql.append("select * from (select tmp_tb.*,ROWNUM row_id from (");
pageSql.append(sql);
pageSql.append(") tmp_tb where ROWNUM<=");
pageSql.append(page.getCurrentResult() + page.getShowCount());
pageSql.append(") where row_id>");
pageSql.append(page.getCurrentResult());
}
return pageSql.toString();
} else {
return sql;
}
}
public Object plugin(Object arg0) {
// TODO Auto-generated method stub
return Plugin.wrap(arg0, this);
}
public void setProperties(Properties p) {
dialect = p.getProperty("dialect");
if (dialect ==null || dialect.equals("")) {
try {
throw new PropertyException("dialect property is not found!");
} catch (PropertyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
pageSqlId = p.getProperty("pageSqlId");
if (dialect ==null || dialect.equals("")) {
try {
throw new PropertyException("pageSqlId property is not found!");
} catch (PropertyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
@RequestMapping("/pagelist")
public ModelAndView pageList(HttpServletRequest request,HttpServletResponse response){
int currentPage = request.getParameter("page")==null?1:Integer.parseInt(request.getParameter("page"));
int pageSize = 3;
if (currentPage<=0){
currentPage =1;
}
int currentResult = (currentPage-1) * pageSize;
System.out.println(request.getRequestURI());
System.out.println(request.getQueryString());
PageInfo page = new PageInfo();
page.setShowCount(pageSize);
page.setCurrentResult(currentResult);
List articles=iUserOperation.selectArticleListPage(page,1);
System.out.println(page);
int totalCount = page.getTotalResult();
int lastPage=0;
if (totalCount % pageSize==0){
lastPage = totalCount % pageSize;
}
else{
lastPage =1+ totalCount / pageSize;
}
if (currentPage>=lastPage){
currentPage =lastPage;
}
String pageStr = "";
pageStr=String.format("上一頁(yè) 下一頁(yè)",
request.getRequestURI()+"?page="+(currentPage-1),request.getRequestURI()+"?page="+(currentPage+1) );
//制定視圖，也就是list.jsp
ModelAndView mav=new ModelAndView("list");
mav.addObject("articles",articles);
mav.addObject("pageStr",pageStr);
return mav;
}
mybatis實(shí)戰(zhàn)教程(mybatis in action)之八:mybatis 動(dòng)態(tài)sql語(yǔ)句
select * from t_blog where 1 = 1
and title = #{title}
and content = #{content}
and owner = #{owner}
select * from t_blog where 1 = 1
and title = #{title}
and content = #{content}
and owner = "owner1"
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mybatis完美實(shí)戰(zhàn)教程
mybatis完美實(shí)戰(zhàn)教程:寫(xiě)在這個(gè)系列前面的話: 以前曾經(jīng)用過(guò)ibatis,這是mybatis的前身，當(dāng)時(shí)在做項(xiàng)目時(shí)，感覺(jué)很不錯(cuò)，比hibernate靈活。性能也比hibernate好。而且也比較輕量級(jí)，因?yàn)楫?dāng)時(shí)在項(xiàng)目中，沒(méi)來(lái)的及做很很多筆記。后來(lái)項(xiàng)目結(jié)束了，我也沒(méi)寫(xiě)總結(jié)文檔。已經(jīng)過(guò)去好久了。但最
程序代碼
