SSM:Spring框架代码的编写

一、在SSM框架中，我们可以在applicationContext.xml文件中编写Spring的框架配置

1.头文件

<?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.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx.xsd">

 <!--开启注解的扫描，希望处理service和dao，controller不需要Spring框架去处理-->
    <context:component-scan base-package="cn.itcast" >
        <!--配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

 

注意：此时开启的注解仅仅是dao和service上的注解，并没有开启web(springmvc)的注解，这里设置了不扫描web的注解

2.编写实体类

package cn.itcast.domain;

import java.io.Serializable;
/**
 * 帐户
 */
public class Account implements Serializable{

    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;
    }

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

 

3.编写dao接口

4.编写service接口和实现类

package cn.itcast.service;
import cn.itcast.domain.Account;
import java.util.List;
public interface AccountService {
    public void saveAccount(Account account);
    public List<Account> findAll();
}

 

package cn.itcast.service.imp;

import cn.itcast.domain.Account;
import cn.itcast.service.AccountService;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("accountService")
public class AccountServiceImp implements AccountService {
    public void saveAccount(Account account) {
        System.out.println("保存了用户信息");
    }
    public List<Account> findAll() {
        System.out.println("查询了所有的用户");
        return null;
    }
}

 

5.编写SSM_web项目测试类进行测试

package cn.itcast.test;

import cn.itcast.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ServiceTest {
    @Test
    public void run1(){
        ApplicationContext ac=new
                ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountService as=(AccountService) ac.getBean("accountService");
        as.findAll();
    }
}