最近太忙了,上次的這個例子都沒寫完,實在不好意思,今天我們把這個例子繼續接着上次的例子做吧。
一、我們先把數據庫的表映射出來,即Users.java
/**
* Users Entity Bean
* @author jinlong0
*/
public class Users {
private Integer id;
private String userName;
private String password;
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 Users() {
}
public Users(Integer id, String userName, String password) {
super();
this.id = id;
this.userName = userName;
this.password = password;
}
}
二、接下來我們把映射的XML寫出來,即Users.xml
<!DOCTYPE sqlMap
PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
"http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap namespace="User">
<typeAlias alias="user" type="org.login.vo.Users"/>
<resultMap class="user" id="get-all-user">
<result property="id" column="id"/>
<result property="userName" column="username"/>
<result property="password" column="password"/>
</resultMap>
<select id="checkUser" parameterClass="user" resultClass="user">
<![CDATA[
SELECT id, username, password FROM users WHERE username = #userName# and password = #password#
]]>
</select>
<select id="getUserById" parameterClass="java.lang.Integer" resultClass="user">
<![CDATA[
SELECT id, username, password FROM users WHERE id = #id#
]]>
</select>
<select id="getAllUser" resultMap="get-all-user">
<![CDATA[
SELECT id, username, password FROM users
]]>
</select>
<insert id="insertUser" parameterClass="user">
<![CDATA[
INSERT INTO users (username, password) VALUES (#userName#, #password#)
]]>
</insert>
<update id="updateUser" parameterClass="user">
<![CDATA[
UPDATE users SET username=#userName#, password=#password# WHERE id=#id#
]]>
</update>
<delete id="deleteUser" parameterClass="java.lang.Integer">
<![CDATA[
DELETE FROM users WHERE id = #id#
]]>
</delete>
</sqlMap>
在這裏我們要特別注意的是與Hibernate的xml的區別,在這個映射的xml裏有了所有的數據操作的SQL語句,這也是ibatis的一個特點,它的半自動化,讓開發人員能隨心所欲的,想必學過ibatis的都很清楚了,在這裏我就不詳細說明了,呵呵!
三、接下來我們就寫DAO層的接口及實現
接口IUserDAO.java
import java.util.List;
import org.login.vo.Users;
public interface IUserDAO {
List<Users> getAllUser();
Users getUserById(Integer id);
boolean isLogin(Users user);
boolean insertUser(Users user);
boolean updateUser(Users user);
boolean deleteUser(Integer id);
}
實現類:UserDAO.java
import java.sql.SQLException;
import java.util.List;
import org.login.dao.IUserDAO;
import org.login.vo.Users;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import com.ibatis.sqlmap.client.SqlMapClient;
@SuppressWarnings("unchecked")
@Service("userDAO")
public class UserDAO implements IUserDAO {
@Autowired(required=false)
@Qualifier("sqlClient")
private SqlMapClient client = null;
public SqlMapClient getClient() {
return client;
}
public void setClient(SqlMapClient client) {
this.client = client;
}
@Override
public boolean deleteUser(Integer id) {
try {
client.delete("deleteUser", id);
return true;
} catch (SQLException e) {
e.printStackTrace();
}
return false;
}
@Override
public List<Users> getAllUser() {
List<Users> list = null;
try {
list = client.queryForList("getAllUser");
} catch (SQLException e) {
e.printStackTrace();
}
return list;
}
@Override
public boolean insertUser(Users user) {
try {
client.insert("insertUser", user);
return true;
} catch (SQLException e) {
e.printStackTrace();
}
return false;
}
@Override
public boolean updateUser(Users user) {
try {
client.update("updateUser", user);
return true;
} catch (SQLException e) {
e.printStackTrace();
}
return false;
}
@Override
public boolean isLogin(Users user) {
try {
Users u = (Users) client.queryForObject("checkUser", user);
if (u != null) {
return true;
}
} catch (SQLException e) {
e.printStackTrace();
}
return false;
}
@Override
public Users getUserById(Integer id) {
Users u = null;
try {
u = (Users) client.queryForObject("getUserById", id);
} catch (SQLException e) {
e.printStackTrace();
}
return u;
}
}
在這裏,接口和我們前面的Hibernate的例子類同,只是實現類區別有點大了。
特別應該注意的是Spring2.5中類的注入方式,是用標註方式注入的,即:
@Service("userDAO")
@Autowired(required=false)
@Qualifier("sqlClient")
這是我們特別應該注意的,這是標註,詳細說明見Spring2.5的開發手冊。
這篇就寫到這裏吧,下篇我們將說明服務層及Struts層的實現,如果有興趣研究的朋友可以先下載示例代碼先看下,具體的下載地址如下:
演示示例下載地址:Struts2.0+Spring2.5.1+ibatis2.3地址:http://download.csdn.net/source/331581
如果有朋友比較喜歡Hibernate的話,過些時候我會再寫個關於Hibernate的集成,不過大家可以先看一下我以前的兩個關於Hibernate方法的集成示例,下載地址如下:
Struts2.0+Spring2.0+HIbernate3.1整合用戶登錄以及增刪改查完整示例:http://download.csdn.net/source/326113