首先，该项目的结构图，如下。
一、导入jar包，并设置java包中的查找内容，包括.xml 文件。
<dependencies>
<!--测试包 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!--引入PageHelper插件-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<!--介入aspectj的相关包 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.11</version>
</dependency>
<!--Spring + springMVC -->
<!--spring的相关包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.5.RELEASE</version>
<scope>test</scope>
</dependency>
<!-- c3p0数据源 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5-pre10</version>
</dependency>
<!--数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.4</version>
</dependency>
<!--导入的是日志相关的包 -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!--带入cglib代理的包 -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.4</version>
</dependency>
<!--servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<!--导入我们jstl的标签库的包 -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>javax.servlet.jsp.jstl-api</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-impl</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>xom</groupId>
<artifactId>xom</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.shiro/shiro-core -->
<dependency>
<groupId>org.apache.shiro</groupId>
<artifactId>shiro-core</artifactId>
<version>1.2.3</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<!--Mybatis jar包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!--MBG- mybatis 逆向生成-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.6</version>
</dependency>
<!--Mybatis 和 Spring-->
<!--An easy-to-use Spring bridge for MyBatis sql mapping framework.-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
<build>
<finalName>SSMBook</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
<resource>
<directory>src/main/webapp</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
<include>**/*.jsp</include>
</includes>
</resource>
</resources>
</build>
二、mybatis 逆向工程生成 POJO + dao接口 + mapper.xml
接着，新建 generator-config.xml 文件，内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<context id="testTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssmbook" userId="root"
password="123456">
</jdbcConnection>
<!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL
和 NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="com.lr.ssmbook.pojo"
targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetProject:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.lr.ssmbook.mapper"
targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!--指定dao接口生成的位置，mapper接口-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.lr.ssmbook.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 指定数据库表 -->
<table tableName="tb_user1" domainObjectName="User"
enableCountByExample="false"
enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false"/>
<table tableName="tb_book1" domainObjectName="Book"
enableCountByExample="false"
enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false"/>
</context>
</generatorConfiguration>
接着，新建一个MGBTest类，逆向工程生成 POJO + dao + mapper.xml
public class MGBTest {
public static void main(String[] args) throws Exception{
org.apache.ibatis.logging.LogFactory.useLog4JLogging();
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("src/main/webapp/config/generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
生成之后的POJO是：Book.class, User.class
public class Book implements Serializable{
private Integer id; //id
private String name;//书名
private String author;//作者
private Date pubdate;//发行日期
private String publication;//出版社
private Double price;//价格
private String image;//封面图片
private String remark;//描述
//getter setter 方法
}
public class User implements Serializable{
private Integer id;//id
private String loginname;//登录名
private String password;//密码
private String username;//用户名
private String phone;//电话
private String address;//地址
//getter setter 方法
}
三、db.properties, log4j.properties 配置信息
db.properties :
#mysqldatabasesetting jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/ssmbook?useUnicode=true&characterEncoding=utf-8 jdbc.user=root jdbc.password=123456 jdbc.initialPoolSize=5 jdbc.maxPoolSize=20 jdbc.maxIdleTime=1000 jdbc.minPoolSize=6
log4j.properties:
log4j.rootLogger=INFO,console,file
#-----------------------------------#
#1 定义日志输出目的地为控制台
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
####可以灵活地指定日志输出格式，下面一行是指定具体的格式 ###
#%c: 输出日志信息所属的类目，通常就是所在类的全名
#%m: 输出代码中指定的消息,产生的日志具体信息
#%n: 输出一个回车换行符，Windows平台为"/r/n"，Unix平台为"/n"输出日志信息换行
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{ABSOLUTE}%5p %c{1}:%L-%m%n
log4j.logger.org.quartz=INFO
log4j.appender.file = org.apache.log4j.RollingFileAppender
#日志文件输出目录
log4j.appender.file.File=src/logs/mylogs.log
#定义文件最大大小
log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.DatePattern=yyyy-MM-dd'.log'
log4j.appender.file.Threshold=INFO
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%-d{yyyy-MM-ddHH\:mm\:ss}[%c][%t\:%r]-[%p]%m%n
四、applicationContext.xml 配置文件
applicationContext.xml 该配置文件，需要整合 mybatis 和 自动注入。
<?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:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--Spring 的配置文件，主要配置和业务逻辑有关的-->
<context:component-scan base-package="com.lr.ssmbook">
<!--扫描所有的除了控制器-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--===================数据源，事务控制=====================================-->
<context:property-placeholder location="classpath:db.properties"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="driverClass" value="${jdbc.driver}"/>
<property name="user" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 初始化连接大小 -->
<property name="initialPoolSize" value="${jdbc.initialPoolSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
<!-- 连接池最大空闲 -->
<property name="maxIdleTime" value="${jdbc.maxIdleTime}"/>
<!-- 连接池最小数量 -->
<property name="minPoolSize" value="${jdbc.minPoolSize}"/>
</bean>
<!--=========================================================================-->
<!--========================配置和 Mybatis 整合===============================-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 注入数据库连接池 -->
<property name="dataSource" ref="dataSource"/>
<!--指定mybatis全局配置文件-->
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
<!--指定mybatis ，mapper 文件的位置-->
<property name="mapperLocations" value="classpath:com/lr/ssmbook/mapper/BookMapper.xml"/>
</bean>
<!--配置扫描器，将mybatis 接口的实现加入到ioc容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入sqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--扫描所有dao接口的实现，加入的ioc容器-->
<property name="basePackage" value="com.lr.ssmbook.dao"/>
</bean>
<!--配置一个可以执行批量的sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"/>
<constructor-arg name="executorType" value="BATCH"/>
</bean>
<!--=======================================================================-->
<!--==============================事务控制的配置===========================-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--控制数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置基于注解的声明式事务-->
<tx:annotation-driven transaction-manager="transactionManager" />
<!--========================================================================-->
</beans>
五、springmvc-config.xml 配置文件
springmvc-config.xml 配置文件，主要是设置controller层的扫描、返回的格式等
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
<!-- 启动mvc注解 设置默认的配置-->
<mvc:annotation-driven />
<!-- 扫描controller -->
<context:component-scan base-package="com.lr.ssmbook.controller"/>
<!-- 不拦截静态资源 -->
<!--<mvc:resources location="/WEB-INF/jsp/" mapping="/jsp/**"></mvc:resources>-->
<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->
</list>
</property>
</bean>
<!-- 定义跳转的文件的前后缀 ，视图模式配置，视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址-->
<property name="prefix" value="/jsp" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 配置annotation 类型的处理映射器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
<!--配置annotation 类型的处理器适配器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
<!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->
<bean id="multipartResolver" name="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 默认编码 -->
<property name="defaultEncoding" value="utf-8" />
<!-- 文件大小最大值 -->
<property name="maxUploadSize" value="10485760000" />
<!-- 内存中的最大值 -->
<property name="maxInMemorySize" value="40960" />
</bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJackson2HttpMessageConverter" />
</list>
</property>
</bean>
<bean id="mappingJackson2HttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>text/json;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</beans>
六、web.xml 配置文件
该web.xml 配置文件，主要是加载application.xml 和 springmvc-config.xml 配置文件并且监听logger日志等。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN "
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>SSMBook</display-name>
<!-- 响应编码：过滤器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<async-supported>true</async-supported>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<!-- log4j日志输出 -->
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4j.properties</param-value>
</context-param>
<!--contextConfigLocation 参数用来指定 Spring 的配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/applicationContext.xml</param-value>
</context-param>
<!--配置 Spring 的核心监听器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--定义 Spring Mvc 的前端控制器-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
七、dao 层
UserDao层接口：UserMapper,其中使用的方法通过注释来执行 sql 语句
public interface UserMapper {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
/*
* 根据登录名和密码查询用户
*@Param: String loginname
* @Param: String password
* @Return 找到返回对象，没有找到返回null
* */
@Select("SELECT * FROM tb_user WHERE loginname = #{loginname} AND password = #{password}")
User findWithLoginAndPsd(@Param("loginname")String loginname, @Param("password") String password);
}
BookDao层接口：BookMapper
public interface BookMapper {
int deleteByPrimaryKey(Integer id);
int insert(Book record);
int insertSelective(Book record);
Book selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(Book record);
int updateByPrimaryKey(Book record);
/*
* 查询所有图书
* @Return 图书对象集合
* */
@Select("SELECT * FROM tb_book")
List<Book> findAll();
public Book findOne(Integer id, String name);
}
八、service 层
UserService接口：
public interface UserService {
/**
* 判断用户登陆
* param String loginname
* param String password;
* return 找到返回的 User 对象，没有找到返回 null
*/
User login(String loginname, String password);
}
UserServiceImpl实现类：
@Service
@Transactional
public class UserServiceImpl implements UserService{
//自动注入 UserMapper
@Autowired
private UserMapper userMapper;
/**
* UserService 接口 login 方法实现
*
*/
@Override
public User login(String loginname, String password) {
return userMapper.findWithLoginAndPsd(loginname, password);
}
}
BookService接口：
public interface BookService {
/**
*查找所有图书
*/
List<Book> getAll();
}
BookServiceImpl实现类：
@Service
@Transactional
public class BookServiceImpl implements BookService{
@Autowired
private BookMapper bookMapper;
@Override
public List<Book> getAll() {
return bookMapper.findAll();
}
}
九、controller 层
UserController：
@Controller
@RequestMapping("/users")
public class UserController {
@Autowired
private UserService userService;
//处理 login 请求
@RequestMapping("/login")
public ModelAndView login(String loginname, String password, HttpSession session){
ModelAndView mav = new ModelAndView();
User user = userService.login(loginname, password);
if (user != null){
session.setAttribute("user", user);
mav.setView(new RedirectView("/books/main"));
}else {
mav.addObject("message", "登录名或密码错误");
mav.setViewName("/login");
}
return mav;
}
}
BookController：
@Controller
@RequestMapping("/books")
public class BookController {
@Autowired
private BookService bookService;
@RequestMapping("/main")
public String main(Model model){
List<Book> book_list = bookService.getAll();
//将图书集合添加到 model 中
model.addAttribute("book_list", book_list);
return "/main";
}
}
十、login.jsp 和 main.jsp
login.jsp:
<%@ page contentType="text/html;charset=UTF-8" %>
<html>
<head>
<title>登陆</title>
</head>
<body>
<form action="/users/login">
<h4 style="color: red;">${requestScope.message}</h4>
<table>
<tr>
<td><label>登录名：</label></td>
<td><input type="text" name="loginname" id="loginname"/></td>
</tr>
<tr>
<td><label>密码</label></td>
<td><input type="password" name="password" id="password"/></td>
</tr>
<tr>
<td><input type="submit" value="登陆"/></td>
</tr>
</table>
</form>
</body>
</html>
main.jsp:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" %>
<%@ page isELIgnored="false" %>
<% String basePath = request.getScheme() + "://" + request.getServerName() +
":" + request.getServerPort() + request.getContextPath() + "/";%>
<html>
<head>
<base href="<%=basePath%>">
<title>首页</title>
<style type="text/css">
table{
border-collapse: collapse;
border-spacing: 0px;
border-left: 1px solid #888888;
}
th, td{
border-right: 1px solid #888888;
border-bottom: 1px solid #888888;
padding: 5px 15px;
}
th{
font-weight: bold;
background: #cccccc;
}
</style>
</head>
<body>
欢迎[${sessionScope.user.username}]访问
<br>
<table>
<tr>
<th>封面</th><th>书名</th><th>作者</th><th>价格</th>
</tr>
<c:forEach items="${requestScope.book_list}" var="book">
<tr>
<td><img src="images/${book.image}" height="60"></td>
<td>${book.name}</td>
<td>${book.author}</td>
<td>${book.price}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
十一、运行结果
由于数据库中，图片没给地址，所以显示为404，不过这都无伤大雅，哈哈。
