myBatis+Spring mvc+ajax 初学

  Archetype Created Web Application
    
        contextConfigLocation
        /WEB-INF/applicationContext.xml
    
    
        org.springframework.web.context.ContextLoaderListener
    
    
        dispatcher
        org.springframework.web.servlet.DispatcherServlet
        1
    
    
        dispatcher
        /
    

web.xml文件中的配置，主要是servlet部分的配置

dispatcher-servlet.xml文件中的配置

关键的部分，在resource文件夹下建立conf.xml文件，将数据库的配置写入，并且关联me.gacl.mapping这个包下的userMapper.xml文件。接下来写userMapper.xml的文件，将具体的SQL的语句写到该文件中

    
        SELECT * FROM Stu WHERE id=#{id}
    
    
        SELECT * FROM Stu WHERE TRUE
        
            AND id = #{id}
        
        
            AND name like CONCAT('%', #{name},'%')
        
        
            AND birthday like CONCAT('%', #{birthday},'%')
        
        
            AND sex like CONCAT(#{sex},'%')
        
        
            AND address like CONCAT('%', #{address},'%')
        
        
            AND teacher like CONCAT('%', #{teacher},'%')
        
    

userMapper.xml文件

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    
    
    
    



id    


name   


birt   


sex    

    
    female
    male


addr   


lead   



查询



    

    

        
学号
        
姓名
        
生日
        
性别
        
地址
        
辅导员
    
    
    

前端部分代码

package com.hundsun.zdr;

import com.google.gson.Gson;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by ZDR on 2016/8/8.
 */
@Controller//标识为控制类
//@RequestMapping("/mvc")
public class mvcController {
    @RequestMapping(value = "/hello",produces = "text/html;charset=UTF-8")//value指定请求的实际地址,produces指定返回的内容类型
    @ResponseBody
    public String hello(@RequestParam(value="id")String id,@RequestParam(value="name")String name,@RequestParam(value="birthday")String birthday,
                        @RequestParam(value="sex")String sex,@RequestParam(value="address")String address,@RequestParam(value="teacher")String teacher){
        System.out.println("======controller start=========="+sex);
        //mybatis的配置文件
        String resource = "conf.xml";
        //使用类加载器加载mybatis的配置文件（它也加载关联的映射文件）
        InputStream is = Stu.class.getClassLoader().getResourceAsStream(resource);
        //构建sqlSession的工厂
        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);
        //创建能执行映射文件中sql的sqlSession
        SqlSession session = sessionFactory.openSession();
        /**
         * 映射sql的标识字符串，
         * me.gacl.mapping.userMapper是userMapper.xml文件中mapper标签的namespace属性的值，
         * getUser是select标签的id属性值，通过select标签的id属性值就可以找到要执行的SQL
         */
        String statement = "me.gacl.mapping.userMapper.getUser";//映射sql的标识字符串
        //执行查询

        Stu checkStu = new Stu();
        checkStu.setId(id);
        checkStu.setName(name);
        checkStu.setSex(sex);
        checkStu.setBirthday(birthday);
        checkStu.setAddress(address);
        checkStu.setTeacher(teacher);

        List resultList = new ArrayList();
        resultList = session.selectList(statement,checkStu);
        System.out.println("===result==="+resultList.toString());
        return (new Gson()).toJson(resultList);//数据返回给页面
    }
}

控制类的代码，因为处理的逻辑很简单，逻辑部分和控制类写在的一起，以后做较大的项目时，应该把逻辑部分建立一个新的类，层次清晰。

package com.hundsun.zdr;

/**
 * Created by ZDR on 2016/8/8.
 */
public class Stu {
    public String name;
    public String id;
    public String birthday;
    public String sex;
    public String address;
    public String teacher;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getTeacher() {
        return teacher;
    }

    public void setTeacher(String teacher) {
        this.teacher = teacher;
    }

    public Stu(){

    }
    public Stu(String name, String id, String birthday, String sex, String address, String teacher) {
        this.name = name;
        this.id = id;
        this.birthday = birthday;
        this.sex = sex;
        this.address = address;
        this.teacher = teacher;
    }

    @Override
    public String toString() {
        return "Stu{" +
                "name='" + name + '\'' +
                ", id='" + id + '\'' +
                ", birthday='" + birthday + '\'' +
                ", sex='" + sex + '\'' +
                ", address='" + address + '\'' +
                ", teacher='" + teacher + '\'' +
                '}';
    }
}

这一部分就不多解释了，实体类。值得一提的是实体类的属性名称要和数据库中字段名一致，这样在userMapper.xml文件中才能直接使用参数名称！即使名称不一致也应该有方法解决，但是名称一致是麻烦最少的方法了。

这次算是之前项目的升级吧，添加了Spring mvc框架、使用了myBatis。前端部分还是基本延续了之前的项目

以上部分就是我个人的学习感受，对于WEB这一块我还是个小白，有不妥的地方还请各位大牛指出，谢谢大家