源码地址：http://files.cnblogs.com/files/suzixuan/springMvcGuide.zip
数据库使用：mysql5.6
mybatis版本：mybatis-3.4.4
根据上次的项目，做了文件夹修改，整体目录如下：
1，修改spring-servlet.xml的文件目录，放在了Java Resources/resources下
web.xml文件内容修改，修改了spring-servlet.xml的加载目录
2，新添加jar包
mybatis-3.4.4.jar
mysql-connector-java-5.1.42-bin.jar
3，新增如上图的文件夹若干
4，增加web.xml中servlet拦截器，用于做静态文件解析。
5，增加mybatis的配置文件
6，添加控制器HomeController下的方法（public String Demo(Model model,@PathVariable("id") int id) ）
7，建表脚本：
DROP TABLE IF EXISTS `t_user`;CREATE TABLE `t_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键', `username` varchar(255) DEFAULT NULL, `password` varchar(255) DEFAULT NULL, `account` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;
下面主要讲解myBatis的配置
myBatis需要jar包：mybatis-3.4.4.jar,mysql-connector-java-5.1.42-bin.jar
配置文件：mysql.properties，mybatis.cfg.xml
jdbc.driver=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:3306/testjdbc.username=rootjdbc.password=
建立Model类
package model;import java.io.Serializable;public class UserBean implements Serializable{ private static final long serialVersionUID = 1L; private Integer id; private String username; private String password; private Double account; private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public UserBean() { super(); } public UserBean(String username, String password, Double account) { super(); this.username = username; this.password = password; this.account = account; } public UserBean(Integer id, String username, String password, Double account) { super(); this.id = id; this.username = username; this.password = password; this.account = account; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Double getAccount() { return account; } public void setAccount(Double account) { this.account = account; } @Override public String toString() { return "UserBean [id=" + id + ", username=" + username + ", password=" + password + ", account=" + account + "]"; } }
mapper文件：UserMapper.xml
insert into t_user (username,password,account) values (#{username},#{password},#{account}) update t_user set username=#{username},password=#{password},account=#{account} where id=#{id} delete from t_user where id=#{id}
建立UserMapper接口：
package mapper;import java.util.List;import java.util.Map;import model.UserBean;/** * @author huidong * */public interface UserMapper { /** * 新增用戶 * @param user * @return * @throws Exception */ public int insertUser(UserBean user) throws Exception; /** * 修改用戶 * @param user * @param id * @return * @throws Exception */ public int updateUser (UserBean user,int id) throws Exception; /** * 刪除用戶 * @param id * @return * @throws Exception */ public int deleteUser(int id) throws Exception; /** * 根据id查询用户信息 * @param id * @return * @throws Exception */ public UserBean selectUserById(int id) throws Exception; /** * 查询所有的用户信息 * @return * @throws Exception */ public List selectAllUser() throws Exception; /** * 根据姓名和密码查询用户信息 * @return * @throws Exception */ public List selectUserByNameAccount(Map map) throws Exception; }
建立DBTools：
package tools;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;public class DBTools { public static SqlSessionFactory sessionFactory; static{ try { //使用MyBatis提供的Resources类加载mybatis的配置文件 Reader reader = Resources.getResourceAsReader("mybatis.cfg.xml"); //构建sqlSession的工厂 sessionFactory = new SqlSessionFactoryBuilder().build(reader); } catch (Exception e) { e.printStackTrace(); } } //创建能执行映射文件中sql的sqlSession public static SqlSession getSession(){ return sessionFactory.openSession(); } }
建立Servic类，做测试
package service;import java.util.HashMap;import java.util.List;import java.util.Map;import org.apache.ibatis.jdbc.SQL;import org.apache.ibatis.session.SqlSession;import model.UserBean;import tools.DBTools;import mapper.UserMapper;public class UserService { /** * 新增用户 */ private static void insertUser() { try (SqlSession session = DBTools.getSession()) { UserBean user = new UserBean("苏子2", "123", 500.0); session.insert("insertUser", user); session.commit(); } } /** * 删除用户 */ private static void deleteUser() { SqlSession session = DBTools.getSession(); UserMapper mapper = session.getMapper(UserMapper.class); try { mapper.deleteUser(1); session.commit(); } catch (Exception e) { e.printStackTrace(); session.rollback(); } } /** * 根据id查询用户 */ public static UserBean selectUserById(int id) { SqlSession session = DBTools.getSession(); UserBean user = session.selectOne("selectUserById", id); if (user == null) { System.out.println("user不存在"); } else { System.out.println(user.toString()); } session.close(); return user; } /** * 查询所有的用户 */ private static void selectAllUser() { SqlSession session = DBTools.getSession(); List list = session.selectList("selectAllUser"); for (UserBean user : list) { System.out.println(user.toString()); } session.close(); } private static void selectUserByQuery() { SqlSession session = DBTools.getSession(); Map map = new HashMap (); map.put("name", "2"); map.put("account", 400); UserMapper mapper = session.getMapper(UserMapper.class); try { List list = mapper.selectUserByNameAccount(map); for (UserBean user : list) { System.out.println(user.toString()); } if (list == null || list.size() <= 0) { System.out.println("数据集为空"); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }}
讲解三个注解：
@RequestMapping，用来映射请求的url地址
@RequestParam，绑定单个请求数据，可以是URL中的数据，表单提交的数据或上传的文件；
@PathVariable，绑定URL模板变量值；
感谢网友们的分享，能让我一步步学习mvc和mybatis。
http://www.cnblogs.com/liukemng/p/3729071.html