web project 部署 spring bean工厂

前提：已经创建web project(接上一篇：eclipse 创建Dynamic web project)

 

一：准备spring依赖包

　　1：spring-core-4.1.6.RELEASE.jar

　　2：spring-context-4.1.6.RELEASE.jar　　(ApplicationContext、ApplicationContext)

　　3：spring-beans-4.1.6.RELEASE.jar

　　4：spring-expression-4.1.6.RELEASE.jar

　　5：spring-web-4.1.6.RELEASE.jar　　　　(ContextLoaderListener)

　　6：commons-logging-1.1.1.jar

　　mysql数据库依赖包：mysql-connector-java-5.1.9.jar

二：分别创建三层类

　　1：servlet:Student.java(extends HttpServlet)

　　2：service:StudentServiceImpl.java、StudentService.java(interface)

　　3：dao:StudentDaoImpl.java、StudentDao.java(interface)

三：配置文件

　　1：web.xml　　[beans路径、监听器]

　　2：applicationContext.xml　　(src目录下)[beans]

四：测试

　　1：http://localhost:post/web_name/student

 

ps:详情如下：

　　1：web.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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>test</display-name>
  
      <!-- 默认配置在WEB-INF目录下 -->  
    <context-param>  
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:/applicationContext.xml</param-value>   <!-- <param-value>/WEB-INF/spring*.xml</param-value> -->
         <!-- <param-value>/WEB-INF/applicationContext.xml</param-value> -->  
    </context-param>
    <listener>
    　　<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener>
  <!-- OR USE THE CONTEXTLOADERSERVLET INSTEAD OF THE LISTENER 
    <servlet> 
        <servlet-name>context</servlet-name> 
        <servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class> 
        <load-on-startup>1</load-on-startup> 
    </servlet> 
    -->   
  <servlet>
      <servlet-name>studentMap</servlet-name>
      <servlet-class>servlet.Student</servlet-class>
  </servlet>
  <servlet-mapping>
      <servlet-name>studentMap</servlet-name>
      <url-pattern>/student</url-pattern>
  </servlet-mapping>
  
</web-app>

　　2：applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
    <bean id="studentDao" class="dao.StudentDaoImpl"></bean>
    <bean id="studentService" class="service.StudentServiceImpl">
       <property name="studentDao" ref="studentDao"></property>
    </bean>
</beans>

　　3:servlet

package servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import service.StudentService;

public class Student extends HttpServlet {

    @Override
    protected void service(HttpServletRequest arg0, HttpServletResponse arg1)
            throws ServletException, IOException {
//        super.service(arg0, arg1);
        
//        String springConfigUrl = this.getServletContext().getInitParameter("contextConfigLocation");
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        StudentService service =(StudentService)ctx.getBean("studentService");
        service.insertStudent(null);
    }
    
}

　　4:service

package service;

import dao.StudentDao;
import entity.Student;

public class StudentServiceImpl implements StudentService {
    private StudentDao studentDao;
    public void setStudentDao(StudentDao studentDao) {
        this.studentDao = studentDao;
    }


    public void insertStudent(Student student){
        studentDao.insert(student);
    }
}

　　5:dao

package dao;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import entity.Student;

public class StudentDaoImpl implements StudentDao {
    static final String driver = "com.mysql.jdbc.Driver";
        static final String url = "jdbc:mysql://xxx:3306/test?autoReconnect=true&useUnicode=true&characterEncoding=utf8&logSlowQueries=false&slowQueryThresholdMillis=0";
        static final String userName = "xxx";
        static final String password = "xxx";
　　
        try{
            Class.forName(driver);
            Connection con = DriverManager.getConnection(url,userName,password);
            Statement sql = con.createStatement();
            sql.execute("insert student(name,math) values('2a','99')");
            
            sql.close();
            con.close();
        }catch(java.lang.ClassNotFoundException e){
            System.err.println("ClassNotFoundException:" + e.getMessage());
        }catch(SQLException ex){
            System.err.println("SQLException:" + ex.getMessage());
        }
        
    }
}

 

 

 

 

public void insert(Student student){