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java的poi技术读取Excel数据到MySQL

news 来源：原创 2024/4/27 18:07:28

这篇blog是介绍java中的poi技术读取Excel数据，然后保存到MySQL数据中。

你也可以在： java的poi技术读取和导入Excel 了解到写入Excel的方法信息

使用JXL技术可以在： java的jxl技术导入Excel

项目结构：

Excel中的测试数据：

数据库结构：

对应的SQL：

1 CREATE TABLE `student_info` (
2   `id` int(11) NOT NULL AUTO_INCREMENT,
3   `no` varchar(20) DEFAULT NULL,
4   `name` varchar(20) DEFAULT NULL,
5   `age` varchar(10) DEFAULT NULL,
6   `score` float DEFAULT '0',
7   PRIMARY KEY (`id`)
8 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

插入数据成功：

如果重复数据，则丢掉：

=============================================

源码部分：

=============================================

/ExcelTest/src/com/b510/client/Client.java

 1 /**
 2  * 
 3  */
 4 package com.b510.client;
 5 
 6 import java.io.IOException;
 7 import java.sql.SQLException;
 8 
 9 import com.b510.excel.SaveData2DB;
10 
11 /**
12  * @author Hongten
13  * @created 2014-5-18
14  */
15 public class Client {
16 
17     public static void main(String[] args) throws IOException, SQLException {
18         SaveData2DB saveData2DB = new SaveData2DB();
19         saveData2DB.save();
20         System.out.println("end");
21     }
22 }

/ExcelTest/src/com/b510/common/Common.java

 1 /**
 2  * 
 3  */
 4 package com.b510.common;
 5 
 6 /**
 7  * @author Hongten
 8  * @created 2014-5-18
 9  */
10 public class Common {
11 
12     // connect the database
13     public static final String DRIVER = "com.mysql.jdbc.Driver";
14     public static final String DB_NAME = "test";
15     public static final String USERNAME = "root";
16     public static final String PASSWORD = "root";
17     public static final String IP = "192.168.1.103";
18     public static final String PORT = "3306";
19     public static final String URL = "jdbc:mysql://" + IP + ":" + PORT + "/" + DB_NAME;
20     
21     // common
22     public static final String EXCEL_PATH = "lib/student_info.xls";
23     
24     // sql
25     public static final String INSERT_STUDENT_SQL = "insert into student_info(no, name, age, score) values(?, ?, ?, ?)";
26     public static final String UPDATE_STUDENT_SQL = "update student_info set no = ?, name = ?, age= ?, score = ? where id = ? ";
27     public static final String SELECT_STUDENT_ALL_SQL = "select id,no,name,age,score from student_info";
28     public static final String SELECT_STUDENT_SQL = "select * from student_info where name like ";
29 }

/ExcelTest/src/com/b510/excel/ReadExcel.java

 1 /**
 2  * 
 3  */
 4 package com.b510.excel;
 5 
 6 import java.io.FileInputStream;
 7 import java.io.IOException;
 8 import java.io.InputStream;
 9 import java.util.ArrayList;
10 import java.util.List;
11 
12 import org.apache.poi.hssf.usermodel.HSSFCell;
13 import org.apache.poi.hssf.usermodel.HSSFRow;
14 import org.apache.poi.hssf.usermodel.HSSFSheet;
15 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
16 
17 import com.b510.common.Common;
18 import com.b510.excel.vo.Student;
19 
20 /**
21  * @author Hongten
22  * @created 2014-5-18
23  */
24 public class ReadExcel {
25 
26     public List<Student> readXls() throws IOException {
27         InputStream is = new FileInputStream(Common.EXCEL_PATH);
28         HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
29         Student student = null;
30         List<Student> list = new ArrayList<Student>();
31         // 循环工作表Sheet
32         for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
33             HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
34             if (hssfSheet == null) {
35                 continue;
36             }
37             // 循环行Row
38             for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
39                 HSSFRow hssfRow = hssfSheet.getRow(rowNum);
40                 if (hssfRow != null) {
41                     student = new Student();
42                     HSSFCell no = hssfRow.getCell(0);
43                     HSSFCell name = hssfRow.getCell(1);
44                     HSSFCell age = hssfRow.getCell(2);
45                     HSSFCell score = hssfRow.getCell(3);
46                     student.setNo(getValue(no));
47                     student.setName(getValue(name));
48                     student.setAge(getValue(age));
49                     student.setScore(Float.valueOf(getValue(score)));
50                     list.add(student);
51                 }
52             }
53         }
54         return list;
55     }
56     
57      @SuppressWarnings("static-access")
58     private String getValue(HSSFCell hssfCell) {
59             if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
60                 // 返回布尔类型的值
61                 return String.valueOf(hssfCell.getBooleanCellValue());
62             } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
63                 // 返回数值类型的值
64                 return String.valueOf(hssfCell.getNumericCellValue());
65             } else {
66                 // 返回字符串类型的值
67                 return String.valueOf(hssfCell.getStringCellValue());
68             }
69         }
70 }

/ExcelTest/src/com/b510/excel/SaveData2DB.java

 1 /**
 2  * 
 3  */
 4 package com.b510.excel;
 5 
 6 import java.io.IOException;
 7 import java.sql.SQLException;
 8 import java.util.List;
 9 
10 import com.b510.common.Common;
11 import com.b510.excel.util.DbUtil;
12 import com.b510.excel.vo.Student;
13 
14 /**
15  * @author Hongten
16  * @created 2014-5-18
17  */
18 public class SaveData2DB {
19 
20     @SuppressWarnings({ "rawtypes" })
21     public void save() throws IOException, SQLException {
22         ReadExcel xlsMain = new ReadExcel();
23         Student student = null;
24         List<Student> list = xlsMain.readXls();
25 
26         for (int i = 0; i < list.size(); i++) {
27             student = list.get(i);
28             List l = DbUtil.selectOne(Common.SELECT_STUDENT_SQL + "'%" + student.getName() + "%'", student);
29             if (!l.contains(1)) {
30                 DbUtil.insert(Common.INSERT_STUDENT_SQL, student);
31             } else {
32                 System.out.println("The Record was Exist : No. = " + student.getNo() + " , Name = " + student.getName() + ", Age = " + student.getAge() + ", and has been throw away!");
33             }
34         }
35     }
36 }

/ExcelTest/src/com/b510/excel/util/DbUtil.java

  1 /**
  2  * 
  3  */
  4 package com.b510.excel.util;
  5 
  6 import java.sql.Connection;
  7 import java.sql.DriverManager;
  8 import java.sql.PreparedStatement;
  9 import java.sql.ResultSet;
 10 import java.sql.SQLException;
 11 import java.util.ArrayList;
 12 import java.util.List;
 13 
 14 import com.b510.common.Common;
 15 import com.b510.excel.vo.Student;
 16 
 17 /**
 18  * @author Hongten
 19  * @created 2014-5-18
 20  */
 21 public class DbUtil {
 22 
 23     /**
 24      * @param sql
 25      */
 26     public static void insert(String sql, Student student) throws SQLException {
 27         Connection conn = null;
 28         PreparedStatement ps = null;
 29         try {
 30             Class.forName(Common.DRIVER);
 31             conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD);
 32             ps = conn.prepareStatement(sql);
 33             ps.setString(1, student.getNo());
 34             ps.setString(2, student.getName());
 35             ps.setString(3, student.getAge());
 36             ps.setString(4, String.valueOf(student.getScore()));
 37             boolean flag = ps.execute();
 38             if(!flag){
 39                 System.out.println("Save data : No. = " + student.getNo() + " , Name = " + student.getName() + ", Age = " + student.getAge() + " succeed!");
 40             }
 41         } catch (Exception e) {
 42             e.printStackTrace();
 43         } finally {
 44             if (ps != null) {
 45                 ps.close();
 46             }
 47             if (conn != null) {
 48                 conn.close();
 49             }
 50         }
 51     }
 52 
 53     @SuppressWarnings({ "unchecked", "rawtypes" })
 54     public static List selectOne(String sql, Student student) throws SQLException {
 55         Connection conn = null;
 56         PreparedStatement ps = null;
 57         ResultSet rs = null;
 58         List list = new ArrayList();
 59         try {
 60             Class.forName(Common.DRIVER);
 61             conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD);
 62             ps = conn.prepareStatement(sql);
 63             rs = ps.executeQuery();
 64             while(rs.next()){
 65                 if(rs.getString("no").equals(student.getNo()) || rs.getString("name").equals(student.getName())|| rs.getString("age").equals(student.getAge())){
 66                     list.add(1);
 67                 }else{
 68                     list.add(0);
 69                 }
 70             }
 71         } catch (Exception e) {
 72             e.printStackTrace();
 73         } finally {
 74             if (rs != null) {
 75                 rs.close();
 76             }
 77             if (ps != null) {
 78                 ps.close();
 79             }
 80             if (conn != null) {
 81                 conn.close();
 82             }
 83         }
 84         return list;
 85     }
 86     
 87     
 88     public static ResultSet selectAll(String sql) throws SQLException {
 89         Connection conn = null;
 90         PreparedStatement ps = null;
 91         ResultSet rs = null;
 92         try {
 93             Class.forName(Common.DRIVER);
 94             conn = DriverManager.getConnection(Common.URL, Common.USERNAME, Common.PASSWORD);
 95             ps = conn.prepareStatement(sql);
 96             rs = ps.executeQuery();
 97         } catch (Exception e) {
 98             e.printStackTrace();
 99         } finally {
100             if (rs != null) {
101                 rs.close();
102             }
103             if (ps != null) {
104                 ps.close();
105             }
106             if (conn != null) {
107                 conn.close();
108             }
109         }
110         return rs;
111     }
112 
113 }

/ExcelTest/src/com/b510/excel/vo/Student.java

 1 /**
 2  * 
 3  */
 4 package com.b510.excel.vo;
 5 
 6 /**
 7  * Student
 8  * 
 9  * @author Hongten
10  * @created 2014-5-18
11  */
12 public class Student {
13     /**
14      * id
15      */
16     private Integer id;
17     /**
18      * 学号
19      */
20     private String no;
21     /**
22      * 姓名
23      */
24     private String name;
25     /**
26      * 学院
27      */
28     private String age;
29     /**
30      * 成绩
31      */
32     private float score;
33 
34     public Integer getId() {
35         return id;
36     }
37 
38     public void setId(Integer id) {
39         this.id = id;
40     }
41 
42     public String getNo() {
43         return no;
44     }
45 
46     public void setNo(String no) {
47         this.no = no;
48     }
49 
50     public String getName() {
51         return name;
52     }
53 
54     public void setName(String name) {
55         this.name = name;
56     }
57 
58     public String getAge() {
59         return age;
60     }
61 
62     public void setAge(String age) {
63         this.age = age;
64     }
65 
66     public float getScore() {
67         return score;
68     }
69 
70     public void setScore(float score) {
71         this.score = score;
72     }
73 
74 }

源码下载：http://files.cnblogs.com/hongten/ExcelTest.zip

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多读一些书，英语很重要。

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