ssm小小整合

摘要： ssm整合： 首先是建立資料庫： CREATE TABLE `user` ( `id` int(20) NOT NULL, `username` varchar(255) NOT NULL, `password` varchar(255) NOT NULL ) ； ALT...

ssm整合：

首先是建立資料庫：

CREATE TABLE `user` (
`id` int(20) NOT NULL,
`username` varchar(255) NOT NULL,
`password` varchar(255) NOT NULL
) ；

ALTER TABLE `user`
ADD PRIMARY KEY (`id`);


ALTER TABLE `user`
MODIFY `id` int(20) NOT NULL AUTO_INCREMENT；

插入一條測試資料：

在me中建立一個新的web工程

springmvc的基本jar

mybatis基本jar

mybatis-spring整合jar

工程目錄：

MyEclipse可以自動匯入jar

mybatis的jar還需要自己手動匯入到lib檔案中

有些配置檔案是系統自動生成

無須追求一致

lib資料夾

基於mappe開發

1.spring和mybatis的整合：

SqlMapConfig.xml

此時可以根據自己的需要去設定<setting>......

根據自己開發的需求

<?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>
 

<!-- 載入 對映檔案 -->
<mappers>
<package name="com.test.mapper"/>
</mappers>
</configuration>

mapper和java檔案需要在同一個目錄（mybatis知識）

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">


<!-- 載入配置檔案 -->
<context:property-placeholder location="classpath:db.properties"/>

<!-- 資料來源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>



<!-- 配置sqlSessinFactory -->
<!-- org.mybatis.spring.SqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 載入mybatis的配置檔案 -->
<property name="configLocation" value="mybatis/SqlMapConfig.xml" />
<!-- 資料來源 -->
<property name="dataSource" ref="dataSource" />
</bean>


<!-- mapper配置
MapperFactoryBean：根據mapper介面生成代理物件
-->
<!-- mapperInterface指定mapper介面 -->
<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.test.mapper.UserMapper"/>
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>

</beans>

此時的整合基本結束

整合測試：

UserMapper.java

public interface UserMapper {
//根據id查詢使用者資訊
public User findUserById(int id) throws Exception;
public List<User> findUserAll() throws Exception;
}

UserMapper.xml

<?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.test.mapper.UserMapper">
<select id="findUserById" parameterType="int" resultType="com.test.pojo.User">
SELECT * FROM USER WHERE id=#{value}
</select>
<select id="findUserAll" parameterType="int" resultType="com.test.pojo.User">
SELECT * FROM USER 
</select>
</mapper>

測試：

public class test {

public static void main(String[] args) throws Exception {


ApplicationContext app = new ClassPathXmlApplicationContext("spring/applicationContext.xml");

UserMapper user = (UserMapper) app.getBean("userMapper");
User u = user.findUserById(1);
System.out.println(u);
}
}

DEBUG [main] - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6b81ce95]
DEBUG [main] - Returning JDBC Connection to DataSource
User [id=1, username=user, password=1234]

此時資料是可以成功從資料庫中查詢！

2.關於web網頁實現測試

配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
<!-- 配置DispatcherServlet -->
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
 
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

</web-app>

基本的配置也就是 這些了，其他的根據自己專案的需求去設定。

配置springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">

<!-- 配置自動掃描的包 -->
<context:component-scan base-package="com.test"></context:component-scan>
<!--註解開發驅動-->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 配置檢視解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>

配置handler

SelectUser.java

@Controller
public class SelectUser {
@RequestMapping("/list")
public String selectList(Model model) throws Exception{return "list";
}
}

此時先進行程式碼的測試

index.jsp

<body>
<a href="<%=request.getContextPath() %>/list">SelectAll</a>
</body>

list.jsp

<body>
hello
</body>

然後把專案放在tomcat上執行

點選超連結進行跳轉

此時可以成功跳轉

<%=request.getContextPath() %>加上，否則跳轉的路徑可能會出問題

在進行資料的查詢測試：

UserMapperImp.java

把資料庫的查詢以及相關返回均放在一個類中！

public class UserMapperImp {

static ApplicationContext app = new ClassPathXmlApplicationContext("spring/applicationContext.xml");

//查詢全部
public static List<User> getUsers() throws Exception{
UserMapper um = (UserMapper) app.getBean("userMapper");
List<User> u =um.findUserAll();
return u;
}
}

SelectUser.java

@Controller
public class SelectUser {

@RequestMapping("/list")
public String selectList(Model model) throws Exception{
model.addAttribute("users", UserMapperImp.getUsers());
return "list";
}
}

list.jsp

對資料庫進行迴圈遍歷的獲取！

<table border="1" cellpadding="0" cellspacing="0" width="500">
<tr>
<td>id</td>
<td>user</td>
<td>pwd</td>

</tr>
<c:forEach items="${users}" var="u">
<tr>
<td>${u.id}</td>
<td>${u.username}</td>
<td>${u.password}</td>
</tr>
</c:forEach>
</table>

此時再次重新啟動tomcat

點選超連結