宁波实习第三天日志

关于搭建ssm的一些问题

ssm是什么？

SSM（Spring+SpringMVC+MyBatis）是一个由Spring、MyBatis两个开源框架整合而成的框架集。
spring包括IOC和AOP 。
IOC（全称Iversion of Controller，控制反转）控制权反转，把控制权给spring，通过spring来创建对象；AOP全称：Aspect-Oriented Programming，面向切面编程。。
springMVC： M（model模型）V （view视图） C（control控制）
控制输入网址后的跳转界面。
MyBatis 是一个持久层框架，它支持定制化 SQL、存储过程以及高级映射。MyBatis 避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。MyBatis相当于jdbc但比它更加方便。

搭建smm

配置applicationContext文件

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <!-- 1.配置数据库相关参数properties的属性：${url} -->
    <context:property-placeholder location="classpath:db.properties"/>
    <!-- 2.配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${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="2"/>
    </bean>
    <!-- 3.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 扫描bean包 使用别名 -->
        <property name="typeAliasesPackage" value="com.zhongruan.bean"></property>

        <!--配置加载映射文件 UserMapper.xml-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>
    <!-- 自动生成dao,mapper-->
    <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.zhongruan.dao"/>
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <!--自动扫描-->
    <context:component-scan base-package="com.zhongruan"/>
    <!-- 配置事务-->
    <!-- 5.配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 6.开启事务注解-->
    <tx:annotation-driven></tx:annotation-driven>

</beans>

配置db.properties文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/数据库名称?useSSL=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=root

配置log4j.properties日志文件

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

配置spring-mvc.xml文件.
spring-mvc.xml：springMVC配置文件，主要用来配置与springMVC有关的配置，如视图解析器等。

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.3.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 1.注解扫描位置-->
    <context:component-scan base-package="com.zhongruan.controller" />

    <!-- 2.配置映射处理和适配器-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

    <!-- 3.视图的解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

web.xml文件

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

  <!-- 配置加载类路径的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext.xml</param-value>
  </context-param>

  <!-- 配置监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <!-- 解决中文乱码过滤器 -->
  <filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*
  

  
  
    dispatcherServlet
    org.springframework.web.servlet.DispatcherServlet
    
    
      contextConfigLocation
      classpath:spring-mvc.xml
    
    
    1
  
  
    dispatcherServlet
    *.do
  

创建如下图所示文件：
bean实体类包，UserInfo文件放实体类、
dao持久层包，接口IUserInfoDao用来对数据库进行增删改查、
service业务层包，负责业务模块的逻辑应用设计。调用DAO层的接口，又提供接口给Controller层的类来进行调用。
controller控制层包，UserInfoController通过要调用Service层的接口来控制业务流程。

UserInfo文件

package com.zhongruan.bean;
public class UserInfo {
    private int id;
    private String username;
    private String password;
    public int getId() {
        return id;
    }
    public String getUsername() {
        return username;
    }
    public String getPassword() {
        return password;
    }
    public void setId(int id) {
        this.id = id;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "UserInfo{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

UserInfoController文件

package com.zhongruan.controller;

import com.zhongruan.bean.UserInfo;
import com.zhongruan.service.IUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping("user")
public class UserInfoController {
    @Autowired
    IUserInfoService userInfoService;
    @RequestMapping("findAll.do")
    public ModelAndView findAll(){
        List<UserInfo> users=userInfoService.findAll();
        ModelAndView mv=new ModelAndView();
        mv.addObject("users",users);
        mv.setViewName("allUser");
        return mv;
    }
}

IUserInfoDao文件

package com.zhongruan.dao;
import com.zhongruan.bean.UserInfo;
import java.util.List;

public interface IUserInfoDao {
    public List<UserInfo> findAll();
}

UserInfoMapper.xml文件用来实现接口IUserInfoDao

<?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.zhongruan.dao.IUserInfoDao" >
//id="findAll"要实现的函数，resultType="com.zhongruan.bean.UserInfo"是返回值类型
<select id="findAll" resultType="com.zhongruan.bean.UserInfo">
//SQL查询语句
    select * from userinfo
</select>
</mapper>

UserInfoServiceImpl文件

package com.zhongruan.service.impl;
import com.zhongruan.bean.UserInfo;
import com.zhongruan.dao.IUserInfoDao;
import com.zhongruan.service.IUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

@Service("userInfoService")
public class UserInfoServiceImpl implements IUserInfoService {
    @Autowired
    IUserInfoDao userInfoDao;
    @Override
    public List<UserInfo> findAll() {
        return userInfoDao.findAll();
    }
}

IUserInfoService文件

package com.zhongruan.service;
import com.zhongruan.bean.UserInfo;
import java.util.List;

public interface IUserInfoService {
    public List<UserInfo> findAll();
}

更新：
[link]https://blog.csdn.net/qq_37052983/article/details/95732252