IDEA SSM简单整合

SSM整合相关步骤

• 目录结构
  
• 第一步导入jar包
  下面是pom.xml中的配置:

<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>4.0.0modelVersion>

  <groupId>com.wbbgroupId>
  <artifactId>SsmartifactId>
  <version>1.0-SNAPSHOTversion>
  <packaging>warpackaging>

  <name>Ssm Maven Webappname>
  
  <url>http://www.example.comurl>

  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.7maven.compiler.source>
    <maven.compiler.target>1.7maven.compiler.target>
  properties>

  <dependencies>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.11version>
      <scope>testscope>
    dependency>

    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <version>5.1.37version>
    dependency>

    <dependency>
      <groupId>c3p0groupId>
      <artifactId>c3p0artifactId>
      <version>0.9.1.2version>
    dependency>
    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
      <version>3.3.0version>
    dependency>
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>1.2.3version>
    dependency>
  <dependency>
    <groupId>javax.servletgroupId>
    <artifactId>javax.servlet-apiartifactId>
    <version>3.1.0version>
  dependency>
    <dependency>
    <groupId>com.fasterxml.jackson.coregroupId>
    <artifactId>jackson-coreartifactId>
    <version>2.5.4version>
  dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.coregroupId>
    <artifactId>jackson-annotationsartifactId>
    <version>2.5.0version>
  dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.coregroupId>
    <artifactId>jackson-databindartifactId>
    <version>2.5.4version>
  dependency>
  
  
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-coreartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-beansartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-contextartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-jdbcartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-txartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-webartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-webmvcartifactId>
    <version>4.1.7.RELEASEversion>
  dependency>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.12version>
      <scope>compilescope>
    dependency>
  dependencies>

  <build>
    <finalName>SsmfinalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-clean-pluginartifactId>
          <version>3.1.0version>
        plugin>
        
        <plugin>
          <artifactId>maven-resources-pluginartifactId>
          <version>3.0.2version>
        plugin>
        <plugin>
          <artifactId>maven-compiler-pluginartifactId>
          <version>3.8.0version>
        plugin>
        <plugin>
          <artifactId>maven-surefire-pluginartifactId>
          <version>2.22.1version>
        plugin>
        <plugin>
          <artifactId>maven-war-pluginartifactId>
          <version>3.2.2version>
        plugin>
        <plugin>
          <artifactId>maven-install-pluginartifactId>
          <version>2.5.2version>
        plugin>
        <plugin>
          <artifactId>maven-deploy-pluginartifactId>
          <version>2.8.2version>
        plugin>
      plugins>
    pluginManagement>
  build>
project>

注意其中:

javax.servlet
javax.servlet-api
3.1.0

这里servlet-api是3.1.0版本对应的web.xml也要修改
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"version="3.1" metadata-complete="true">
其中webapp后面就要用3.1

• 然后先根据目录结构将要建立的包建好
• 首先在main下新建一个java文件夹右击mark Directory as -> source root
  如图:
  
  这里的java文件夹是存放java代码,
• 在java文件内新建包wbb.entity , wbb.dao , wbb.service , wbb.service.impl , wbb.web
• 在main下新建文件夹resources存放xml文件,同样要右击mark Directory as->resource root
• 在resources文件夹下新建mapper和spring文件夹存放对数据库操作的配置和springmvc的配置
• 然后编写配置文件web.xml

  <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
  http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
  version="3.1" metadata-complete="true">
    <display-name>Archetype Created Web Applicationdisplay-name>
  
    
    
    <servlet>
      <servlet-name>DispatcherServletservlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
      
      <init-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:spring/spring-*.xmlparam-value>
      init-param>
    servlet>
    <servlet-mapping>
      <servlet-name>DispatcherServletservlet-name>
      
      <url-pattern>/url-pattern>
    servlet-mapping>
  
  web-app>
  

• 在resources下新建mybatis-config.xml并配置以下内容

  
  
  <configuration>
      
      <settings>
        
          <setting name="logImpl" value="STDOUT_LOGGING" />
          <setting name="lazyLoadingEnabled" value="true" />
          <setting name="aggressiveLazyLoading" value="false" />
  
          
          <setting name="useGeneratedKeys" value="true" />
  
          
          <setting name="useColumnLabel" value="true" />
  
          
          <setting name="mapUnderscoreToCamelCase" value="true" />
      settings>
  configuration>
  

• 然后在spring目录下新建spring-web.xml和spring-dao.xml
  spring-web.xml的内容:

  <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"
  xmlns:contex="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/context
  http://www.springframework.org/schema/context/spring-context.xsd
  http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
      
      
      
      <mvc:annotation-driven>mvc:annotation-driven>
      <mvc:default-servlet-handler>mvc:default-servlet-handler>
      
      
      <context:component-scan base-package="wbb.service"/>
      
      <context:component-scan base-package="wbb.dao"/>
      
      <context:component-scan base-package="wbb.service.impl"/>
      
      <context:component-scan base-package="wbb.web"/>
  
  beans>
  

spring-dao.xml内容:

<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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
    
    
    <context:property-placeholder location="classpath:jdbc.properties" />

    
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        
        
        <property name="driverClass" value="${jdbc.driver}" />
        <property name="jdbcUrl" value="${jdbc.url}" />
        <property name="user" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />

        
        <property name="maxPoolSize" value="30" />
        <property name="minPoolSize" value="10" />
        
        <property name="autoCommitOnClose" value="false" />
        
        <property name="checkoutTimeout" value="10000" />
        
        <property name="acquireRetryAttempts" value="2" />
    bean>


    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="dataSource" ref="dataSource" />
        
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        
        
        <property name="mapperLocations" value="classpath:mapper/*.xml" />
    bean>

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        
        <property name="basePackage" value="wbb.dao" />
bean>
beans>

其中可以配置jdbc.properties也可以写死在此配置中,这里在resources目录下新建jdbc.properties文件并配置一下内容
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=你的密码

• 然后在entity中新建类例如Book类
  下面的内容只需要写好数据库中对应的属性然后alt+insert快捷生成构造方法就行了

  package wbb.entity;
  
  public class Book {
    //Book中的信息,跟数据库表中信息对应
      private String id;
      private String name;
      private String author;
      private String publisher;
  //下面可以通过idea自带的alt+insert选择getter+setter快捷生成
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public String getName() {
          return name;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  
      public String getAuthor() {
          return author;
      }
  
      public void setAuthor(String author) {
          this.author = author;
      }
  
      public String getPublisher() {
          return publisher;
      }
  
      public void setPublisher(String publisher) {
          this.publisher = publisher;
      }
  }
  

• 然后写dao层,在dao目录下新建Bookdao接口类

  package wbb.dao;
  
  import org.springframework.stereotype.Component;
  import wbb.entity.Book;
  
  import java.util.List;
  //通过Component将BookDao内容注入spring容器
  @Component
  public interface BookDao {
    //先随便写个方法,获取全部信息要用List
      public List<Book> getAll();
  }
  

  • 然后写dao对应的mapper,在resources目录下的mapper目录下新建BookMapper.xml文件:

  select * from book ```
• 在service目录下新建BookService接口类对应BookDao的方法

  package wbb.service;
  
  
  import wbb.entity.Book;
  
  import java.util.List;
  
  public interface BookService {
      /**
       * 获取所有的书
       * @return
       */
     public List<Book> getAllb();
  }
  

• 然后在service.impl目录下新建service接口的实现类BookServiceImpl.xml

  package wbb.service.impl;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import wbb.dao.BookDao;
  import wbb.entity.Book;
  import wbb.service.BookService;
  
  import java.util.List;
  
  //通过下面注解自动注入spring容器
  @Service("bookService")
  public class BookServiceImpl implements BookService {
    //注入bookDao
      @Autowired
      private BookDao bookDao;
  
      @Override
      public List<Book> getAllb() {
        //用于测试service层是否注入成功
          System.out.println("查询");
         return bookDao.getAll();
      }
  }
  

• 最后写web层或Controller,在web目录下新建BookController类

  package wbb.web;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  import wbb.entity.Book;
  import wbb.service.BookService;
  
  import java.util.List;
  
  //下面注解也可以使用Controller,@RestController注解是@Controller和@ResponseBody注解的结合。表明这是一个控制器类
  @RestController
  public class BookController {
    //注入BookService
      @Autowired
      private BookService bookService;
  //RequestMapping是一个用来处理请求地址映射的注解，可用于类或方法上。用于类上，表示类中的所有响应请求的方法都是以该地址作为父路径。
      @RequestMapping("/getAll")
      public List<Book> getAll(){
          return bookService.getAllb();
      }
  }
  

运行测试:
这里可以用maven也可以用tomcat
maven配置tomcat只需要像配置tomcat一样新建一个maven然后在Parameters栏里面的Command line:中输入tomcat:run
然后运行等自动下载配置完成就行
如图:

其中输出的是json类型的,如果没有以下jar包可能会报错

com.fasterxml.jackson.core
jackson-core
2.5.4


com.fasterxml.jackson.core
jackson-annotations
2.5.0


com.fasterxml.jackson.core
jackson-databind
2.5.4