添加StudentServiceImpl.java

src/cn/edu/hactcm/Service/impl/StudentServiceImpl.java

@@ -0,0 +1,72 @@
+package com.itheima.service.impl;
+
+
+import com.itheima.dao.StudentDao;
+import com.itheima.po.PageInfo;
+import com.itheima.po.Student;
+import com.itheima.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+/**
+ * 用户Service接口实现类
+ */
+@Service("studentService")
+@Transactional
+public class StudentServiceImpl implements StudentService {
+	// 注入studentDao
+	@Autowired
+	private StudentDao studentDao;
+
+
+	//分页查询
+	@Override
+	public PageInfo<Student> findPageInfo(String s_name, Integer s_studentid,Integer s_classid,
+										  String s_classname, Integer pageIndex, Integer pageSize) {
+		PageInfo<Student> pi = new PageInfo<Student>();
+		pi.setPageIndex(pageIndex);
+		pi.setPageSize(pageSize);
+		//获取总条数
+		Integer totalCount = studentDao.totalCount(s_name,s_studentid,s_classid,s_classname);
+		if (totalCount>0){
+			pi.setTotalCount(totalCount);
+			//每一页显示学生信息数
+			//currentPage = (pageIndex-1)*pageSize  当前页码数减1*最大条数=开始行数
+		List<Student> studentList =	studentDao.getStudentList(s_name,s_studentid,s_classid,s_classname,
+				     (pi.getPageIndex()-1)*pi.getPageSize(),pi.getPageSize());
+		  pi.setList(studentList);
+		}
+		return pi;
+	}
+
+	@Override
+	public List<Student> getAll(){
+		List<Student> studentList = studentDao.getAll();
+		return studentList;
+	}
+
+	//通过id删除学生信息
+	@Override
+	public int deleteStudent(Integer s_id) {
+		return studentDao.deleteStudent(s_id);
+	}
+    //添加学生信息
+	@Override
+	public  int addStudent(Student student) {
+		return studentDao.addStudent(student);
+	}
+	//修改学生信息
+	@Override
+	public int updateStudent(Student student) { return studentDao.updateStudent(student); }
+
+	@Override
+	public Student findStudentById (Integer s_id){
+		Student s = studentDao.findStudentById(s_id);
+         return  s;
+	}
+
+
+}