IDEA搭建SSM實現登陸、註冊，數據增刪改查功能

時間 2019-11-24

標籤 idea 搭建 ssm 實現登陸註冊數據增刪功能欄目 Eclipse 简体版

原文原文鏈接

本博文的源代碼：百度雲盤/java/java實例/SSM實例/SSM實現登陸註冊，增刪改查/IDEA搭建SSM實現登陸，註冊，增刪改查功能.zip

搭建空的Maven項目

使用Intellij idea 搭建基本的maven空項目 new->projecthtml

最後Finish，Maven項目搭建完成java

構建項目基本骨架
1，在java下新建com
2，在com下新建springmvc
3，在springmvc下新建controller、dao、mapping、pojo、service
以下圖：mysql

目錄解釋以下
controller：http（GET和POST等）請求的入口，調用Service，想客戶端返回數據web

dao：接口，定義了數據表映射成的對象，具備的操做spring

mapping：具體是sql語句，以xml格式存在，即mybatis的語法文件sql

service：controller調用的服務，service調用dao裏面定義的數據庫行爲方法，來執行對應mapping裏的mybatis，從而完成與數據庫完整的交互。數據庫

修改pom文件
配置你的mavenapache

在pom.xml文件中添加以下內容：json

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com</groupId>
  <artifactId>ssm</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- spring版本號 -->
<spring.version>4.1.4.RELEASE</spring.version>
<!-- mybatis版本號 -->
<mybatis.version>3.2.8</mybatis.version>
<!-- log4j日誌文件管理包版本 -->
<slf4j.version>1.7.7</slf4j.version>
<log4j.version>1.2.17</log4j.version>
<!-- jackson包版本 -->
<jackson.version>2.5.0</jackson.version>
  </properties>

  <dependencies>


<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>3.8.1</version>
  <scope>test</scope>
</dependency>
<!-- mybatis核心包 -->
<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis</artifactId>
  <version>${mybatis.version}</version>
</dependency>
<!-- mybatis/spring包 -->
<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis-spring</artifactId>
  <version>1.2.2</version>
</dependency>
<!--spring單元測試依賴 -->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-test</artifactId>
  <version>${spring.version}</version>
  <scope>test</scope>
</dependency>

<!-- springMVC核心包 -->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>${spring.version}</version>
</dependency>

<!-- spring核心包 -->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-core</artifactId>
  <version>${spring.version}</version>
</dependency>


<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-beans</artifactId>
  <version>${spring.version}</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-context</artifactId>
  <version>${spring.version}</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-context-support</artifactId>
  <version>${spring.version}</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-tx</artifactId>
  <version>${spring.version}</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-web</artifactId>
  <version>${spring.version}</version>
</dependency>

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-jdbc</artifactId>
  <version>${spring.version}</version>
</dependency>


<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.0.1</version>
  <scope>provided</scope>
</dependency>

<dependency>
  <groupId>javax.servlet.jsp</groupId>
  <artifactId>jsp-api</artifactId>
  <version>2.2</version>
  <scope>provided</scope>
</dependency>


<!-- 導入Mysql數據庫連接jar包 -->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.30</version>
</dependency>

<!-- 導入dbcp的jar包，用來在applicationContext.xml中配置數據庫 -->
<dependency>
  <groupId>commons-dbcp</groupId>
  <artifactId>commons-dbcp</artifactId>
  <version>1.2.2</version>
</dependency>

<!-- JSTL標籤類 -->
<dependency>
  <groupId>jstl</groupId>
  <artifactId>jstl</artifactId>
  <version>1.2</version>
</dependency>
<!-- 日誌文件管理包 -->
<!-- log start -->
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>${log4j.version}</version>
</dependency>


<!-- 格式化對象，方便輸出日誌 -->
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>fastjson</artifactId>
  <version>1.1.41</version>
</dependency>


<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>${slf4j.version}</version>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>${slf4j.version}</version>
</dependency>
<!-- log end -->
<!-- 映入JSON -->
<dependency>
  <groupId>org.codehaus.jackson</groupId>
  <artifactId>jackson-mapper-asl</artifactId>
  <version>1.9.13</version>
</dependency>

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.1.0</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>2.1.0</version>
</dependency>

<!-- 上傳組件包 -->
<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.1</version>
</dependency>
<dependency>
  <groupId>commons-io</groupId>
  <artifactId>commons-io</artifactId>
  <version>2.4</version>
</dependency>
<dependency>
  <groupId>commons-codec</groupId>
  <artifactId>commons-codec</artifactId>
  <version>1.9</version>
</dependency>

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.11</version>
  <!-- 表示開發的時候引入，發佈的時候不會加載此包 -->
  <scope>test</scope>
</dependency>


<!--Spring test相關依賴-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-test</artifactId>
  <version>4.1.7.RELEASE</version>
</dependency>
<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>RELEASE</version>
</dependency>

<dependency>
  <groupId>org.jsoup</groupId>
  <artifactId>jsoup</artifactId>
  <version>1.8.1</version>
</dependency>

<dependency>
  <groupId>net.sourceforge.htmlunit</groupId>
  <artifactId>htmlunit</artifactId>
  <version>2.15</version>
</dependency>


<dependency>
  <groupId>org.seleniumhq.selenium</groupId>
  <artifactId>selenium-java</artifactId>
  <version>2.33.0</version>
</dependency>


<dependency>
  <groupId>us.codecraft</groupId>
  <artifactId>webmagic-core</artifactId>
  <version>0.6.1</version>
</dependency>
<dependency>
  <groupId>us.codecraft</groupId>
  <artifactId>webmagic-extension</artifactId>
  <version>0.6.1</version>
</dependency>


  </dependencies>
  <build>
<finalName>com</finalName>
  <resources>
<resource>
  <directory>src/main/java</directory>
  <includes>
    <include>**/*.xml</include>
  </includes>
  <filtering>true</filtering>
</resource>
  </resources>
  </build>

</project>

編寫ssm配置文件

在resources下新建個配置文件jdbc.properties，內容以下：api

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
username=root
password=root
定義初始鏈接數
initialSize=0
定義最大鏈接數
maxActive=20
定義最大空閒
maxIdle=20
定義最小空閒
minIdle=1
定義最長等待時間
maxWait=60000

請確保你的mysql服務是開啓的，且存在數據庫test

在resources下新建個配置文件spring-mvc.xml，內容以下：

<?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: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-3.1.xsd  
                    http://www.springframework.org/schema/context  
                    http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                    http://www.springframework.org/schema/mvc  
                    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 自動掃描該包，使SpringMVC認爲包下用了@controller註解的類是控制器 -->
<context:component-scan base-package="com.springmvc.controller" />

<!--避免IE執行AJAX時，返回JSON出現下載文件 -->
<bean id="mappingJacksonHttpMessageConverter"
    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
    <property name="supportedMediaTypes">
        <list>
            <value>text/html;charset=UTF-8</value>
        </list>
    </property>
</bean>
<!-- 啓動SpringMVC的註解功能，完成請求和註解POJO的映射 -->
<bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
        <list>
            <ref bean="mappingJacksonHttpMessageConverter" />   <!-- JSON轉換器 -->
        </list>
    </property>
</bean>
<!-- 定義跳轉的文件的先後綴 ，視圖模式配置-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <!-- 這裏的配置個人理解是自動給後面action的方法return的字符串加上前綴和後綴，變成一個 可用的url地址 -->
    <property name="prefix" value="/" />
    <property name="suffix" value=".jsp" />
</bean>

<!-- 配置文件上傳，若是沒有使用文件上傳能夠不用配置，固然若是不配，那麼配置文件中也沒必要引入上傳組件包 -->
<bean id="multipartResolver"  
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
    <!-- 默認編碼 -->
    <property name="defaultEncoding" value="utf-8" />  
    <!-- 文件大小最大值 -->
    <property name="maxUploadSize" value="10485760000" />  
    <!-- 內存中的最大值 -->
    <property name="maxInMemorySize" value="40960" />  
</bean> 

</beans>

mybatis-config.xml配置：

<?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>
<!--配置全局屬性-->
<settings>
    <setting name="logImpl" value="LOG4J" />
    <setting name="cacheEnabled" value="true"/>
</settings>
</configuration>

spring-mybatis配置：

<?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: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-3.1.xsd  
                    http://www.springframework.org/schema/context  
                    http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                    http://www.springframework.org/schema/mvc  
                    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 自動掃描 -->
<context:component-scan base-package="com.springmvc" />
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location" value="classpath:jdbc.properties" />
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <property name="driverClassName" value="${driver}" />
    <property name="url" value="${url}" />
    <property name="username" value="${username}" />
    <property name="password" value="${password}" />
    <!-- 初始化鏈接大小 -->
    <property name="initialSize" value="${initialSize}"></property>
    <!-- 鏈接池最大數量 -->
    <property name="maxActive" value="${maxActive}"></property>
    <!-- 鏈接池最大空閒 -->
    <property name="maxIdle" value="${maxIdle}"></property>
    <!-- 鏈接池最小空閒 -->
    <property name="minIdle" value="${minIdle}"></property>
    <!-- 獲取鏈接最大等待時間 -->
    <property name="maxWait" value="${maxWait}"></property>
</bean>

<!-- spring和MyBatis完美整合，不須要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation" value="classpath:/mybatis-config.xml"></property>
    <!-- 自動掃描mapping.xml文件 -->
    <property name="mapperLocations" value="classpath:com/springmvc/mapping/*.xml"></property>

</bean>

<!-- DAO接口所在包名，Spring會自動查找其下的類 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.springmvc.dao" />
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

<!-- (事務管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>

log4j.xml

日誌模塊的配置：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "http://toolkit.alibaba-inc.com/dtd/log4j/log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://jakarta.apache.org/log4j/ ">
<appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="[%d{yyyy-MM-dd HH:mm:ss.SSS}]-[%c]-[%t] %x - %m%n"/>
    </layout>
</appender>

<!-- Mybatis and SQL -->
<logger name="org.apache.ibatis" additivity="true">
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<logger name="org.mybatis.spring" additivity="true">
    <level value="ERROR"/>
    <appender-ref ref="consoleAppender"/>
</logger>
<logger name="java.sql" additivity="true">
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<logger name="java.sql.Connection" additivity="true">
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<logger name="java.sql.Statement" additivity="true">
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<logger name="java.sql.PreparedStatement" additivity="true">
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<!-- Spring -->
<logger name="org.springframework" additivity="true">
    <level value="ERROR"/>
    <appender-ref ref="consoleAppender"/>
</logger>

<!-- ActiveMQ -->
<logger name="org.apache.activemq" additivity="true">
    <level value="ERROR"/>
    <appender-ref ref="consoleAppender"/>
</logger>
<!-- ===================================================================== -->
<!--  根日誌記錄器                                                          -->
<!-- ===================================================================== -->
<root>
    <level value="DEBUG"/>
    <appender-ref ref="consoleAppender"/>
</root>
</log4j:configuration>

log4j.properties

定義LOG輸出級別
log4j.rootLogger=INFO,Console,File
定義日誌輸出目的地爲控制檯
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
能夠靈活地指定日誌輸出格式，下面一行是指定具體的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n

文件大小到達指定尺寸的時候產生一個新的文件
log4j.appender.File = org.apache.log4j.RollingFileAppender
指定輸出目錄
log4j.appender.File.File = logs/ssm.log
定義文件最大大小
log4j.appender.File.MaxFileSize = 10MB
 輸出因此日誌，若是換成DEBUG表示輸出DEBUG以上級別日誌
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH:mm:ss}][%c]%m%n

至此：

配置項目工程

第一步：將配置文件添加入工程

配置webapp

在src下建立目錄webapp

web.xml文件

<!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>Archetype Created Web Application</display-name>
  <!-- Spring和mybatis的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
  </context-param>

  <!--Log4j配置-->
  <context-param>
<param-name>log4jRefreshInterval</param-name>
<param-value>60000</param-value>
  </context-param>
  <listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>


  <!-- 編碼過濾器 -->
  <filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<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>

  <!--Spring監聽器 ApplicationContext 載入 -->
  <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 防止Spring內存溢出監聽器 -->
  <listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
  </listener>


  <!-- Spring MVC 核心配置開始 -->
  <servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 能夠經過contextConfigLocation來自定義SpringMVC配置文件的位置，如不指定，則默認在WEB-INF目錄下，名稱爲[<servlet-name>]-servlet.xml，
     此時文件名必須爲[<servlet-name>]-servlet.xml，不然會出錯-->
<!--如下init-param是自定義SpringMVC的配置文件的位置 -->
<init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
  </servlet>


  <!-- 攔截設置 -->
  <servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<!-- 此處能夠能夠配置成*.do，對應struts的後綴習慣 -->
<url-pattern>/</url-pattern>
  </servlet-mapping>
  <!-- Spring MVC 核心配置結束 -->

  <!-- 配置SESSION超時，單位是分鐘 -->
  <session-config>
    <session-timeout>15</session-timeout>
  </session-config>


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

把webapp添加入項目工程

添加artifacts

配置tomcat

登陸、註冊，增刪改查功能實現

項目結構以下

controller層代碼

package com.springmvc.controller;
import com.springmvc.pojo.Admin;
import com.springmvc.service.AdminService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

@Controller
public class main {

@Autowired
private AdminService adminService;
/**
  * 獲取全部信息
 * @param request
 * @param model
 * @return
 */
@RequestMapping("/getAllUser")
public String getAllUser(HttpServletRequest request, Model model){
    List<Admin> admin=adminService.findAll();
    System.out.println(admin);
    model.addAttribute("list",admin);
    request.setAttribute("list",admin);
    return "allUser";
}



/**
 * 添加信息
 * @param admin
 * @param model
 * @return
 */
@RequestMapping("/addUser")
public String addUser(Admin admin, Model model){
    adminService.save(admin);
    return "redirect:getAllUser";
}

/**
 * 修改信息
 * @param admin
 * @param request
 * @param model
 * @return
 */
@RequestMapping("/updateUser")
public String updateUser(Admin admin,HttpServletRequest request,Model model){
    if(adminService.update(admin)){
        admin=adminService.findById(admin.getId());
        request.setAttribute("admin",admin);
        model.addAttribute("admin",admin);
        return "redirect:getAllUser";
    }else{
        return "error";
    }
}

/**
 * 根據id查詢
 * @param id
 * @param request
 * @param model
 * @return
 */
@RequestMapping("/getUser")
public String getUser(int id,HttpServletRequest request,Model model){
    request.setAttribute("admin",adminService.findById(id));
    model.addAttribute("admin",adminService.findById(id));
    return "editUser";
}

/**
 * 刪除用戶
 * @param id
 */
@RequestMapping("/delUser")
public String delUser(int id){
    adminService.delete(id);
    return "redirect:getAllUser";
}

/**
 * 註冊帳號
 * @param admin
 * @param model
 * @return
 */
@RequestMapping("/register")
public String register(Admin admin, Model model){
    adminService.save(admin);
    return "login";
}

/**
 * 登陸帳號
 * @return
 */
@RequestMapping("/login")
public String login(Admin admin,Model model){
    Admin ad=adminService.login(admin);
    if(ad!=null){
        return "redirect:getAllUser";
    }else{
        return "error";
        }
    }
}

service層代碼

package com.springmvc.service;
import com.springmvc.dao.AdminMapper;
import com.springmvc.pojo.Admin;
import com.sun.jna.platform.win32.Netapi32Util;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;

@Service("AdminService")

public class AdminService {
    @Resource
    private AdminMapper adminMapper;
    /**
     * 添加數據
     */
    public void save(Admin admin) {
        adminMapper.save(admin);
    }

    /**
     * 根據id修改
     * @param admin
     * @return
     */
    public boolean update(Admin admin) {
        return adminMapper.update(admin);
    }

/**
 * 根據id刪除
 * @param id
 * @return
 */
public boolean delete(int id) {
    return adminMapper.delete(id);
}

/**
 * 根據id查詢
 * @param id
 * @return
 */
public Admin findById(int id) {
    Admin admin=adminMapper.findById(id);
    return admin;
}

/**
 * 查詢全部
 * @return
 */
public List<Admin> findAll() {
    List<Admin> findallList=adminMapper.findAll();
    return findallList;
}

/**
 * 登陸帳號
 */
public Admin login(Admin admin){
    return adminMapper.login(admin);
}
}

dao層代碼

package com.springmvc.dao;

import com.springmvc.pojo.Admin;

import java.util.List;

public interface AdminMapper {

void save(Admin admin);
boolean update(Admin admin);
boolean delete(int id);
Admin findById(int id);
List<Admin> findAll();
Admin login(Admin admin);

}

mapping層代碼

<?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.springmvc.dao.AdminMapper" >
  <resultMap id="BaseResultMap" type="com.springmvc.pojo.Admin" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="name" property="name" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
  </resultMap>


  <insert id="save" parameterType="com.springmvc.pojo.Admin">
        insert into admin(name,password) values(#{name},#{password})
    </insert>
  <update id="update" parameterType="com.springmvc.pojo.Admin">
        update admin set name=#{name},password=#{password} where id=#{id}
    </update>
  <delete id="delete" parameterType="int">
        delete from admin where id=#{id}
    </delete>
  <!-- mybsits_config中配置的alias類別名,也可直接配置resultType爲類路徑 -->
  <select id="findById" parameterType="int" resultType="com.springmvc.pojo.Admin">
        select id,name,password from admin where id=#{id}
    </select>
  <select id="findAll" resultType="com.springmvc.pojo.Admin">
        select id,name,password from admin
    </select>

    <select id="login" resultMap="BaseResultMap" parameterType="com.springmvc.pojo.Admin">
     select*from admin where name=#{name} and password=#{password}
  </select>

</mapper>

pojo層代碼

package com.springmvc.pojo;

public class Admin {
private Integer id;

private String name;

private String password;

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name == null ? null : name.trim();
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password == null ? null : password.trim();
}

@Override
public String toString() {
    return "Admin{" +
            "id=" + id +
            ", name='" + name + '\'' +
            ", password='" + password + '\'' +
            '}';
}
}

<?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.springmvc.dao.AdminMapper" > <resultMap id="BaseResultMap" type="com.springmvc.pojo.Admin" > <id column="id" property="id" jdbcType="INTEGER" /> <result column="name" property="name" jdbcType="VARCHAR" /> <result column="password" property="password" jdbcType="VARCHAR" /> </resultMap>

<insert id="save" parameterType="com.springmvc.pojo.Admin"> insert into admin(name,password) values(#{name},#{password}) </insert> <update id="update" parameterType="com.springmvc.pojo.Admin"> update admin set name=#{name},password=#{password} where id=#{id} </update> <delete id="delete" parameterType="int"> delete from admin where id=#{id} </delete>  <select id="findById" parameterType="int" resultType="com.springmvc.pojo.Admin"> select id,name,password from admin where id=#{id} </select> <select id="findAll" resultType="com.springmvc.pojo.Admin"> select id,name,password from admin </select>
<select id="login" resultMap="BaseResultMap" parameterType="com.springmvc.pojo.Admin"> select*from admin where name=#{name} and password=#{password} </select>
</mapper>--------------------- 做者：char_long 來源：CSDN 原文：https://blog.csdn.net/sinat_37001576/article/details/79985228