java利用POI操作excel

POI操作excel,保存数据到数据库流程：

1.获取工作簿（内含多个工作表）

2.获取该工作簿的所有工作表

3.对工作表进行取值操作，遍历每一行的每一个单元格，取值放到对应的model存储器中

4.编写保存方法，保存model对象到MySQL

1.控制器代码，执行读表或者保存数据到数据库

public class Controler {
 
 public static void main(String[] args) throws FileNotFoundException, IOException {
  String path = "E:/2015级OOP实训材料/附件1：2013级2015—2016学年度第一学期教材计划【完整格式数据】.xlsx";
  Read.start(path);
  //Insert.start(path); 
 }
}

2.然后先看读表的代码：

public class Read {
 public Read(){
  
 }
 public static void start(String path) throws FileNotFoundException, IOException{
  Workbook book = getWorkBook(path);
  Sheet sheet = getSheets(book);
  SheetIterator(sheet);
 }
    private static void SheetIterator(Sheet sheet){
      Iterator<Row> iterator = sheet.iterator();
   while(iterator.hasNext()){
    Row nextRow = iterator.next();
    if(nextRow.getRowNum()<3){
              continue;
             }
             Iterator<Cell> cellIterator = nextRow.cellIterator();
             while (cellIterator.hasNext()) {
                 Cell cell = cellIterator.next();
                 
                 switch (cell.getCellType()) {
                     case Cell.CELL_TYPE_STRING:
                         System.out.print(cell.getStringCellValue());
                         break;
                     case Cell.CELL_TYPE_BOOLEAN:
                         System.out.print(cell.getBooleanCellValue());
                         break;
                     case Cell.CELL_TYPE_NUMERIC:
                         System.out.print(cell.getNumericCellValue());
                         break;
                 }
                 System.out.print("   ");
             }
             System.out.println("   ");
   } 
   System.out.println("   ");
 }
 
 private static Sheet getSheets(Workbook book) {
  return(Sheet) book.getSheetAt(0);
 }
 public static Workbook getWorkBook(String path) throws FileNotFoundException, IOException{
  return path.endsWith(".xls")?(new HSSFWorkbook(new FileInputStream(new File(path)))):(path.endsWith(".xlsx")?(new XSSFWorkbook(new FileInputStream(new File(path)))):(null));
 }
}

3.保存到数据库的代码，与读表类似

public class Insert {
public Insert() {
}
public static void start(String path) throws FileNotFoundException, IOException {
Workbook book = getWorkBook(path);
Sheet sheet = getSheets(book);
System.out.println("sheet name:" + sheet.getSheetName());
SheetIterator(sheet);
}
private static void SheetIterator(Sheet sheet) {
Iterator<Row> iterator = sheet.iterator();
while (iterator.hasNext()) {
Row nextRow = iterator.next();
if (nextRow.getRowNum() < 3) {
continue;
}
Iterator<Cell> cellIterator = nextRow.cellIterator();
StringBuffer course_str = new StringBuffer("");
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
nextRow.getCell(cell.getColumnIndex()).setCellType(Cell.CELL_TYPE_STRING);
if (cell.getColumnIndex() < 8) {
Object course_obj = cell.getStringCellValue();
course_str.append(course_obj + "-");
}

}
Object[] course_obj = new Object[20];
String c_str = new String(course_str);
System.out.println(c_str);
course_obj = c_str.split("-");
Course course = new Course();
course.setSerial(Integer.parseInt(course_obj[0].toString()));
course.setDept(course_obj[1].toString());
course.setMajor(course_obj[2].toString());
course.setCourse_name(course_obj[3].toString());
course.setCredit(course_obj[4].toString());
course.setNatrue(course_obj[5].toString());
course.setTest_way(course_obj[6].toString());
course.setTeacher_in_charge(course_obj[7].toString());
CourseImp c = new CourseImp();

try {
c.save(course);//调用你的方法保存数据
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(" ");
}
System.out.println("   ");
}
private static Sheet getSheets(Workbook book) {
return (Sheet) book.getSheetAt(0);
}
public static Workbook getWorkBook(String path) throws FileNotFoundException, IOException {
return path.endsWith(".xls") ? (new HSSFWorkbook(new FileInputStream(new File(path))))
: (path.endsWith(".xlsx") ? (new XSSFWorkbook(new FileInputStream(new File(path)))) : (null));
}
}

3，存储器model

public class Course implements Serializable {
 /**
  *
  */
 private static final long serialVersionUID = -993930170402063910L;
 private Integer serial;
 
 private String dept;
 
 private String major;
 
 private String course_name;
 
 private String credit;
 
 private String natrue;
 
 private String test_way;
 
 private String teacher_in_charge;
 public Course(){
  super();
 }
 public Integer getSerial() {
  return serial;
 }
 public void setSerial(Integer serial) {
  this.serial = serial;
 }
 public String getDept() {
  return dept;
 }
 public void setDept(String dept) {
  this.dept = dept;
 }
 public String getMajor() {
  return major;
 }
 public void setMajor(String major) {
  this.major = major;
 }
 public String getCourse_name() {
  return course_name;
 }
 public void setCourse_name(String course_name) {
  this.course_name = course_name;
 }
 public String getCredit() {
  return credit;
 }
 public void setCredit(String credit) {
  this.credit = credit;
 }
 public String getNatrue() {
  return natrue;
 }
 public void setNatrue(String natrue) {
  this.natrue = natrue;
 }
 public String getTest_way() {
  return test_way;
 }
 public void setTest_way(String test_way) {
  this.test_way = test_way;
 }
 public String getTeacher_in_charge() {
  return teacher_in_charge;
 }
 public void setTeacher_in_charge(String teacher_in_charge) {
  this.teacher_in_charge = teacher_in_charge;
 }
}

4,save方法

public class CourseImp implements ICourse {
 
 private static final String sql_save = " INSERT INTO course(序号,系,专业名称,课程名称,学分,课程性质,考核方式,责任教师) VALUES(?,?,?,?,?,?,?,?)";
 

 @Override
 public Integer save(Course course) throws Exception {
  
  Connection conn = null;
  PreparedStatement prep = null;
        int i = 0;
  try {
   conn = DBUtil.getConnection();
   prep = conn.prepareStatement(sql_save);
   prep.setInt(1, course.getSerial());
   prep.setString(2, course.getDept());
   prep.setString(3, course.getMajor());
   prep.setString(4, course.getCourse_name());
   prep.setString(5, course.getCredit());
   prep.setString(6, course.getNatrue());
   prep.setString(7, course.getTest_way());
   prep.setString(8, course.getTeacher_in_charge());
   
   i  = prep.executeUpdate();
    if(i>0){
    System.out.println("1 row affected...");
    }else if(i==0){
     System.out.println("insert failed...");
    }
  } catch (SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   DBUtil.release( prep, conn);
  }
  return i;
 }
 
}