SSM框架快速搭建（四）

12、在resources下log4j.properties配置文件

   log4j.properties文件内容：（设置log的打印级别）

###  把日志信息输出到控制台  ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
###  设置优先级别、以及输出源 ###
log4j.rootLogger=debug,stdout

13、编写业务代码

        先给出结构目录，防止出现错误

13.1、controller下的内容：        

        ClassesController.java内容：

package com.aaa.ssm.controller;
 
 
import com.aaa.ssm.entity.Classes;
import com.aaa.ssm.service.ClassesService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 
import java.util.List;
 
 
@Controller
@RequestMapping("classes")
public class ClassesController {
    @Autowired
    private ClassesService classesService;
 
    @RequestMapping("findClasses")
    public String findClasses(Model model) {
        List list = classesService.findClasses();
        model.addAttribute("claList", list);
        return "showClasses";
    }
 
    @RequestMapping("addClasses")
    public String addClasses(Classes classes, Model model) {
        classesService.addClasses(classes);
        model.addAttribute("msg", "班级录入成功！");
        return findClasses(model);
    }
}

        StudentController.java内容：

package com.aaa.ssm.controller;
 
import com.aaa.ssm.entity.Student;
import com.aaa.ssm.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
 
import java.util.List;
 
@Controller
@RequestMapping("stu")
public class StudentController {
    @Autowired
    private StudentService studentService;
 
    @RequestMapping("findStu")
    public String findStu(Model model) {
        List list = studentService.findAllStudent();
        model.addAttribute("list", list);
        return "showStu";
    }
 
    @RequestMapping("addStu")
    public String addStu(Student student, Model model) {
        studentService.addStudent(student);
        model.addAttribute("msg", "学生信息录入成功！");
        return findStu(model);
    }
}

13.2、 service下的内容：

        ClassesService.java接口：

package com.aaa.ssm.service;
 
 
import com.aaa.ssm.entity.Classes;
import org.springframework.stereotype.Service;
 
import java.util.List;
 
 
public interface ClassesService {
 
    public List findClasses();
 
    public void addClasses(Classes classes);
}

         ClassesServiceImpl.java实现类：

package com.aaa.ssm.service.serviceImpl;
 
import com.aaa.ssm.dao.ClassesMapper;
import com.aaa.ssm.entity.Classes;
import com.aaa.ssm.service.ClassesService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
 
import java.util.List;
 
@Service
public class ClassesServiceImpl implements ClassesService {
    @Autowired
    private ClassesMapper classesMapper;
 
    @Override
    @Transactional(isolation = Isolation.DEFAULT,propagation = Propagation.REQUIRED)
    public void addClasses(Classes classes) {
        classesMapper.insert(classes);
    }
 
    @Override
    @Transactional(isolation = Isolation.DEFAULT,propagation = Propagation.SUPPORTS)
    public List findClasses() {
        return classesMapper.selectAll();
    }
}

        StudentService.java接口：

package com.aaa.ssm.service;
 
import com.aaa.ssm.entity.Student;
import org.springframework.stereotype.Service;
 
import java.util.List;
 
 
public interface StudentService {
    public void addStudent(Student student);
 
    public List findAllStudent();
}

        StudentServiceImpl.java实现类：

package com.aaa.ssm.service.serviceImpl;
 
import com.aaa.ssm.dao.StudentMapper;
import com.aaa.ssm.entity.Student;
import com.aaa.ssm.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import java.util.List;
 
 
@Service
public class StudentServiceImpl implements StudentService {
    @Autowired
    private StudentMapper studentMapper;
 
    @Override
    public void addStudent(Student student) {
        studentMapper.insert(student);
    }
 
    @Override
    public List findAllStudent() {
        return studentMapper.selectAll();
    }
}

13.3 dao下内容

        ClassesMapper接口内容：

package com.aaa.ssm.dao;
 
import com.aaa.ssm.entity.Classes;
 
import java.util.List;
 
public interface ClassesMapper {
    int deleteByPrimaryKey(Integer classId);
 
    int insert(Classes record);
 
    int insertSelective(Classes record);
 
    Classes selectByPrimaryKey(Integer classId);
 
    int updateByPrimaryKeySelective(Classes record);
 
    int updateByPrimaryKey(Classes record);
 
    List selectAll();
}

        StudentMapper接口内容：

package com.aaa.ssm.dao;
 
import com.aaa.ssm.entity.Student;
 
import java.util.List;
 
public interface StudentMapper {
    int deleteByPrimaryKey(Integer stuId);
 
    int insert(Student record);
 
    int insertSelective(Student record);
 
    Student selectByPrimaryKey(Integer stuId);
 
    int updateByPrimaryKeySelective(Student record);
 
    int updateByPrimaryKey(Student record);
 
    List selectAll();
 
 
}

13.4、在resources.config.mybatis.mapper下编写selectAll查询语句（只给出截图）

         ClassesMapper.xml里

        StudentMapper.xml里