web後端開發分爲3層html
表現層 SpringMVC 和瀏覽器交互前端
業務層 Spring框架 業務邏輯java
持久層 MyBatis 和數據庫交互mysql
整合能夠用配置文件+註解的方式。web
以Spring爲主整合 SpringMVC 和 MyBatisspring
開發環境:sql
系統:windows7 64位數據庫
java:IDEAexpress
數據庫:mysqlapache
數據庫管理器:SQLyog
先配一下環境變量。。。以前的筆記裏有寫。
tomcat的下載安裝配置
http://www.javashuo.com/article/p-eeakymjt-ek.html
mysql的下載安裝配置
http://www.javashuo.com/article/p-qngrpxcr-gd.html
1.建立數據庫
下載安裝打開SQLyog,新建數據庫鏈接
而後輸入信息,通常用默認的就行了,輸入密碼
點擊測試鏈接,彈出success說明鏈接成功
點擊鏈接,成功登錄。
輸入sql語句建立數據庫ssm,在裏面建立新表account
CREATE DATABASE ssm; USE ssm; CREATE TABLE account( id INT PRIMARY KEY AUTO_INCREMENT, NAME VARCHAR(20), money DOUBLE );
建立後左邊刷新看見新庫,table裏面是建立的表。
2. IDEA新建spring架構的工程
File - new - Project
Maven - 勾選Create from archetype - 選擇maven的webapp (有不少webapp- -別選錯了),上面是選擇JDK版本,貌似如今開發都用8(1.8),我這個是最新的10(也就是1.10)
填寫組信息,若是建的時候選中了其餘的工程,上面會有parent和add as modeule to的選項,改爲none,否則就變成了其餘工程的下屬module了。
而後一直next,到最後,這裏找個位置,而後起個項目名字,點finish。
項目建立完成。
3.配置文件:pom.xml
修改properties
<properties> <!-- 這裏至關於定義了一些變量,未來修改版本的時候只改這裏就能夠了。 --> <spring.version>5.0.2.RELEASE</spring.version> <slf4j.version>1.6.6</slf4j.version> <log4j.version>1.2.12</log4j.version> <shiro.version>1.2.3</shiro.version> <mysql.version>5.1.6</mysql.version> <mybatis.version>3.4.5</mybatis.version> </properties>
修改dependencies
<dependencies> <!-- spring --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</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>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</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-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>compile</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</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 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> <type>jar</type> <scope>compile</scope> </dependency> </dependencies>
4.添加必要文件夾
main下面建立2個新文件夾,java 和 resources
把java設爲Sources Root,用來存放java類
把resources設爲resources Root, 用來存放js,圖片這類的資源。
java下面建立4個package
controller:用來處理和前臺的交互
dao:持久層或者數據訪問層,用來和數據庫交互
domain:歷來存放javabean(剛接觸的人可能不知道是啥- -其實就是儲存信息的基本類,只有屬性,get,set方法,單純用來儲存數據,這種class類叫作javabean。我是理解爲MVC中M層的entity。。。)
service:用來處理業務邏輯
整個項目的大致結構:web前端 - controller - service - domain - dao - database數據庫
這樣環境就搭建完畢了。
而後嘗試完成目標:對用戶帳戶的操做(添加和查詢)
1.在domain中建立Account類,用來映射剛纔數據庫新建的Account表中的數據。
添加3個屬性對應3個表屬性
package domain; //CREATE DATABASE ssm; //USE ssm; //CREATE TABLE account( //id INT PRIMARY KEY AUTO_INCREMENT, //NAME VARCHAR(20), //money DOUBLE //); public class Account { private Integer id; private String name; private double money; 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; } public double getMoney() { return money; } public void setMoney(double money) { this.money = money; } }
並生成對應get和set方法。
2.在dao中建立接口AccountDao,類型是interface。
在裏面添加兩個抽象方法,由於AccountDao是接口,因此先不用實現。
package dao; import domain.Account; import java.util.List; public interface AccountDao { //返回全部帳戶信息 public List<Account> findAll(); //保存全部帳戶信息 public void saveAccount(Account account); }
3.在service下面建立接口AccountService
package service; import domain.Account; import java.util.List; public interface AccountService { //返回全部帳戶信息 public List<Account> findAll(); //保存全部帳戶信息 public void saveAccount(Account account); }
在service下面建立新文件夾serviceImpl(implement實現),用來實現接口
serviceImpl中添加class類,AccountServiceImpl,先簡單實現兩個方法。
package com.itheima.service.serviceImpl; import com.itheima.domain.Account; import com.itheima.service.AccountService; import org.springframework.stereotype.Service; import java.util.List; @Service("accountService") //表名是實現了哪一個類,讓spring能夠掃描到這個類 public class AccountServiceImpl implements AccountService { public List<Account> findAll() { System.out.println("業務層查詢全部帳戶"); return null; } public void saveAccount(Account account) { System.out.println("業務層查詢儲存帳戶"); } }
在controller下面添加class AccountContoller。
這個類主要負責先後臺交互,後面再具體實現。
這樣就完成了account這個對象信息傳遞的 web前端 - controller - service - domain - dao - database數據庫 的基本結構。
而後先完成springMVC部分:
1. 添加psringMVC配置文件
在resources中添加spring的配置文件,若是沒有這個選項說明以前pom.xml配置錯了。springframework沒導入
而後起個名字springConfig,這個名字不影響,有意義就行,完成後是這個樣子。
java下面建一個package,起個名字叫com.itheima (名字隨意。。。),
而後把目前java下面的4個package放進去。
而後修改springConfig.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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置spring建立容器時要掃描的包,掃描註解, base-package的值是須要掃描的包名 --> <context:component-scan base-package="com.itheima"> <!--制定掃包規則,不掃描@Controller註解的JAVA類,其餘的仍是要掃描 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> </beans>
注意包名和剛纔建立的package名字一致。
這裏把controller排除在外,由於這個是spring的配置文件,controller是歸springMVC管。
啓動後spring會把class都實例化。
能夠測試一下spring可不能夠用了。
在resources下面添加新配置文件,起名log4j,用來記錄日誌。(dependency中已經配置過了,不加的話會報錯,不過不影響項目運行。由於只是輸出日誌用的。)
在裏面加入配置
# Set root category priority to INFO and its only appender to CONSOLE. #log4j.rootCategory=INFO, CONSOLE debug info warn error fatal log4j.rootCategory=info, CONSOLE, LOGFILE # Set the enterprise logger category to FATAL and its only appender to CONSOLE. log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE # CONSOLE is set to be a ConsoleAppender using a PatternLayout. log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n # LOGFILE is set to be a File appender using a PatternLayout. log4j.appender.LOGFILE=org.apache.log4j.FileAppender log4j.appender.LOGFILE.File=d:\axis.log log4j.appender.LOGFILE.Append=true log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
java下面的com.itheima package下面建一個test package,建立類SpringTest用來測試
這裏測試的方法是利用了spring啓動後會掃描java包,而後爲class建立bean對象(名字默認爲class名字,首字母變小寫)。這是實現AOP(面向切面編程,spring的主要思想之一)的必要步驟,因此能夠利用這個來測試spring是否成功建立了對象,從而發現spring是否在工做了。
package com.itheima.test; import com.itheima.service.AccountService; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class SpringTest { @Test public void test1() { ApplicationContext ac = new ClassPathXmlApplicationContext("springConfig.xml");//手動加載配置文件 AccountService as = (AccountService)ac.getBean("accountService"); as.findAll(); //測試spring可否運行 } }
這裏Test是junit裏面的註解(dependency裏面也配置了),專門用於局部測試,添加上後就能夠直接右鍵方法直接運行方法進行測試了。
輸出成功。
說明spring部分沒問題了。
而後開始springMVC
1.配置xml
在resources下面建立Spring Config名字叫:springMVC.xml,用來配置springMVC
springMVC.xml代碼:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置建立spring容器要掃描的包 --> <context:component-scan base-package="com.itheima"> <!-- 制定掃包規則 ,只掃描使用@Controller註解的JAVA類 --> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 配置視圖解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:annotation-driven></mvc:annotation-driven> </beans>
修改web.xml
web.xml代碼
<?xml version="1.0" encoding="UTF-8"?> <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_2_5.xsd" version="2.5"> <display-name>ssm_web</display-name> <!-- 配置spring mvc的核心控制器 --> <servlet> <servlet-name>springmvcDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始化參數,用於讀取springmvc的配置文件,注意名字和springMVC配置文件名字一致 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springMVC.xml</param-value> </init-param> <!-- 配置servlet的對象的建立時間點:應用加載時建立。取值只能是非0正整數,表示啓動順序 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvcDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 配置springMVC編碼過濾器 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 設置過濾器中的屬性值 --> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <!-- 啓動過濾器 --> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <!-- 過濾全部請求 --> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
2.修改AccountController
這裏用了String傳值 和ModelAndView傳值 兩種方法
package com.itheima.controller; import com.itheima.domain.Account; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping("account") public class AccountController { @RequestMapping("findAll") public ModelAndView findAll(){ ModelAndView mav = new ModelAndView(); mav.setViewName("findAllAccount"); Account[] accountList = new Account[2]; Account a1 = new Account(); a1.setId(1); a1.setMoney(10.0); a1.setName("account1"); Account a2 = new Account(); a2.setId(2); a2.setMoney(20.0); a2.setName("account2"); accountList[0] = a1; accountList[1] = a2; mav.addObject("accountList", accountList); return mav; } @RequestMapping("saveAccount") public String saveAccount(Model model, Account account){ model.addAttribute("accountName", account.getName()); return "saveAccount"; } }
3.添加對應jsp頁面
在webapp - WEB-INF下添加pages文件夾,在裏面新建兩個jsp文件,對應兩個方法的返回頁面名字。
修改index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <body> <h2>Hello ssm</h2> <form action="/account/saveAccount" method="post"> 帳戶信息:<br/> 帳戶編號:<input type="text" name = 'id'><br/><!--name要和account的屬性一致--> 帳戶名:<input type="text" name = 'name'><br/> 金額:<input type="text" name = 'money'><br/> <input type ="submit" value = "保存"> </form> <a href = "/account/findAll">顯示全部帳戶信息</a> </body> </html>
修改saveAccount.jsp
<%-- Created by IntelliJ IDEA. User: Administrator Date: 10/30/2019 Time: 7:46 AM To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>success</title> </head> <body> <div>${accountName} 已保存</div> </body> </html>
修改findAllAccount.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: Administrator Date: 10/30/2019 Time: 7:45 AM To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <table> <tr> <th>編號</th> <th>帳戶名稱</th> <th>帳戶金額</th> </tr> <c:forEach items="${accountList}" var="account"> <tr> <td>${account.id}</td> <td>${account.name }</td> <td>${account.money }</td> </tr> </c:forEach> </table> </body> </html>
啓動tomcat測試一下
點擊保存
返回了index填寫的名字,傳值成功
返回index頁面,點擊顯示全部帳戶信息
僞造的數據能夠顯示。
springMVC能夠獨立運行。
而後開始整合spring 和 springMVC
修改web.xml
添加監聽器,在tomcat啓動時加載spring的配置
添加的代碼:
<!-- 配置spring提供的監聽器,用於啓動服務時加載容器 。 該間監聽器只能加載WEB-INF目錄中名稱爲applicationContext.xml的配置文件 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- 由於咱們名字和位置都和默認值不一樣,因此要手動指定spring配置文件位置,注意param-value的值,要和建立的名字一致 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springConfig.xml</param-value> </context-param>
修改controller,把手動僞造的數據變爲調用service方法
package com.itheima.controller; import com.itheima.domain.Account; import com.itheima.service.AccountService; 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 org.springframework.web.servlet.ModelAndView; import java.util.List; @Controller @RequestMapping("account") public class AccountController { @Autowired //自動注入,取到spring建立的代理對象,對業務層進行操做。 private AccountService accountService; @RequestMapping("findAll") public ModelAndView findAll(){ ModelAndView mav = new ModelAndView(); mav.setViewName("findAllAccount"); List<Account> accountList = accountService.findAll(); mav.addObject("accountList", accountList); return mav; } @RequestMapping("saveAccount") public String saveAccount(Model model, Account account){ model.addAttribute("accountName", account.getName()); accountService.saveAccount(account); return "saveAccount"; } }
再運行tomcat,點擊index的按鈕
調用到了sevice層的方法,整合成功
開始寫Mybatis部分
1.配置文件
resources下面建立新配置文件
名字叫SqlMapConfig.xml 這裏由於是file因此要手動寫後綴名
配置文件代碼:
<?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> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC"></transactionManager> <dataSource type="pooled"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/ssm"/> <property name="username" value="root"/> <!--mysql的帳戶密碼,根據本身的mysql實際狀況修改--> <property name="password" value="Zy1990526"/> </dataSource> </environment> </environments> <mappers> <!--<mapper class="com.itheima.dao.AccountDao"/>--><!--掃描這個class--> <package name="com.itheima.dao"/> <!--掃描包下面全部dao,這樣之後添加新的dao救不用修改了--> </mappers> </configuration>
修改AccountDao,經過註解實現操做數據庫
package com.itheima.dao; import com.itheima.domain.Account; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import java.util.List; public interface AccountDao { //返回全部帳戶信息 @Select("select * from account") //利用ibatis的註解用sql語句操做數據庫 public List<Account> findAll(); //保存全部帳戶信息 @Insert("insert into account(name,money) values(#{name}, #{money}) ") //id是自增加的因此只須要name和money的值。 public void saveAccount(Account account); }
建立測試:
在test下面建立MyBatisTest
package com.itheima.test; import com.itheima.dao.AccountDao; import com.itheima.domain.Account; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.Test; import java.io.InputStream; import java.util.List; public class MybatisTest { @Test public void findAllTest() throws Exception { InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in); SqlSession session= factory.openSession(); AccountDao dao = session.getMapper(AccountDao.class);//取得MyBatis生成的代理對象 List<Account> accountList = dao.findAll();//調用對象方法,往數據庫裏插入一條數據。 for(int i=0; i<accountList.size(); i++){ System.out.println(accountList.get(i).toString()); } session.close(); in.close(); } @Test public void saveAccountTest() throws Exception { Account account = new Account(); account.setId(1); account.setName("account1"); account.setMoney(5000f); InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml"); SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in); SqlSession session= factory.openSession(); AccountDao dao = session.getMapper(AccountDao.class);//取得MyBatis生成的代理對象 dao.saveAccount(account);//調用對象方法,往數據庫裏插入一條數據。 session.commit(); //提交修改,不然數據庫會回滾。. session.close(); in.close(); } }
運行saveAccountTest方法後,查看mysql數據庫的account表(aaa和bbb是從數據庫手動插入的,用來測試)
運行findAllAccount查詢後(上面的警告是由於JDK版本太高,可能出現不兼容,1.9以上貌似都會有這個警告)
MyBatis獨立運行成功。
開始整合spring和mybatis
1.配置文件
springConfig的beans裏面添加配置,把MyBatis的部分加進來
添加內容後:
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置spring建立容器時要掃描的包,掃描註解, base-package的值是須要掃描的包名 --> <context:component-scan base-package="com.itheima"> <!--制定掃包規則,不掃描@Controller註解的JAVA類,其餘的仍是要掃描 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 配置C3P0的鏈接池對象 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/ssm"/> <!--數據庫名稱--> <property name="username" value="root" /> <!--用戶名--> <property name="password" value="Zy1990526" /> <!--密碼--> </bean> <!-- 配置SqlSession的工廠 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置掃描dao的包 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.itheima.dao"/> <!--修改成本身dao的路徑--> </bean> </beans>
而後 SqlMapConfig.xml 就沒用了,把裏面內容清空。
2。修改java部分
修改AccountDao
在上面添加註解@Repository,把接口交給spring掃描
添加後:
package com.itheima.dao; import com.itheima.domain.Account; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import org.springframework.stereotype.Repository; import java.util.List; @Repository public interface AccountDao { //返回全部帳戶信息 @Select("select * from account") //利用ibatis的註解用sql語句操做數據庫 public List<Account> findAll(); //保存全部帳戶信息 @Insert("insert into account(name,money) value(#{name}, #{money}) ") //id是自增加的。 public void saveAccount(Account account); }
修改AccountServiceImpl,把裏面的方法與dao的方法掛鉤。
package com.itheima.service.serviceImpl; import com.itheima.dao.AccountDao; import com.itheima.domain.Account; import com.itheima.service.AccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service("accountService") //表名是實現了哪一個類,讓spring能夠掃描到這個類 public class AccountServiceImpl implements AccountService { @Autowired private AccountDao accountDao; //注入dao public List<Account> findAll() { System.out.println("業務層查詢全部帳戶"); return accountDao.findAll(); } public void saveAccount(Account account) { System.out.println("業務層查詢儲存帳戶"); accountDao.saveAccount(account); } }
這樣整個框架就串起來了
前臺點擊提交後,調用controller,而後controller中使用service中的方法調用dao的方法,dao的方法鏈接數據庫查詢結果後返回結果,給service,service返回給controller,controller傳給跳轉頁面顯示。完成業務流程。
整合完成,開始測試
點擊保存
頁面跳轉成功,而後返回,點擊顯示全部帳戶信息
成功。
ssm框架整合完成。
而後纔想起來- -id是自增加的,不必在前臺和controller裏面賦值。。。
由於配置文件很容易出問題,並且還很差改,因此把最後完成的完整版的4個配置文件放在這= =
springConfig.xml
變量部分:spring部分的java所在位置。 數據庫信息,整合到spring的dao部分的路徑
com.itheima
<property name="url" value="jdbc:mysql://localhost:3306/ssm"/> <!--數據庫名稱-->
<property name="username" value="root" /> <!--用戶名-->
<property name="password" value="Zy1990526" /> <!--密碼-->
com.itheima.dao
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置spring建立容器時要掃描的包,掃描註解, base-package的值是須要掃描的包名 --> <context:component-scan base-package="com.itheima"> <!--制定掃包規則,不掃描@Controller註解的JAVA類,其餘的仍是要掃描 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 配置C3P0的鏈接池對象 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/ssm"/> <!--數據庫名稱--> <property name="username" value="root" /> <!--用戶名--> <property name="password" value="Zy1990526" /> <!--密碼--> </bean> <!-- 配置SqlSession的工廠 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置掃描dao的包 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.itheima.dao"/> <!--修改成本身dao的路徑--> </bean> </beans>
springMVC.xml
變量部分:springMVC 須要掃的controller所在java包位置,和前端 jsp 頁面所在位置,若是不同須要修改。
com.itheima
/WEB-INF/pages/
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置建立spring容器要掃描的包 --> <context:component-scan base-package="com.itheima"> <!-- 制定掃包規則 ,只掃描使用@Controller註解的JAVA類 --> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" /> </context:component-scan> <!-- 配置視圖解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> <mvc:annotation-driven></mvc:annotation-driven> </beans>
web.xml
變量部分: 整合其餘兩個xml用的路徑,若是文件名不同須要修改
classpath:springConfig.xml
classpath:springMVC.xml
<?xml version="1.0" encoding="UTF-8"?> <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_2_5.xsd" version="2.5"> <display-name>ssm_web</display-name> <!-- 配置spring提供的監聽器,用於啓動服務時加載容器 。 該間監聽器只能加載WEB-INF目錄中名稱爲applicationContext.xml的配置文件 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- 由於咱們名字和位置都和默認值不一樣,因此要手動指定spring配置文件位置,注意param-value的值,要和建立的名字一致 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springConfig.xml</param-value> </context-param> <!-- 配置spring mvc的核心控制器 --> <servlet> <servlet-name>springmvcDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始化參數,用於讀取springmvc的配置文件,注意名字和springMVC配置文件名字一致 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springMVC.xml</param-value> </init-param> <!-- 配置servlet的對象的建立時間點:應用加載時建立。取值只能是非0正整數,表示啓動順序 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvcDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 配置springMVC編碼過濾器 --> <filter> <filter-name>CharacterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 設置過濾器中的屬性值 --> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <!-- 啓動過濾器 --> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <!-- 過濾全部請求 --> <filter-mapping> <filter-name>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
pom.xml 不用修改
<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>SpringMVC_test</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm Maven Webapp</name> <url>http://www.example.com</url> <properties> <!-- 這裏至關於定義了一些變量,未來修改版本的時候只改這裏就能夠了。 --> <spring.version>5.0.2.RELEASE</spring.version> <slf4j.version>1.6.6</slf4j.version> <log4j.version>1.2.12</log4j.version> <shiro.version>1.2.3</shiro.version> <mysql.version>5.1.6</mysql.version> <mybatis.version>3.4.5</mybatis.version> </properties> <dependencies> <!-- spring --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</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>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</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-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>compile</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</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 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> <type>jar</type> <scope>compile</scope> </dependency> </dependencies> <build> <finalName>ssm</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>3.1.0</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>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</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> </build> </project>
注意裏面的變量。。。根據實際狀況修改。