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 ：
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 NULLAUTO_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：
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源码部分：
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/ExcelTest/src/com/b510/client/Client.java
1 /**
2 *
3 */
4 packagecom.b510.client;
5
6 importjava.io.IOException;
7 importjava.sql.SQLException;
8
9 importcom.b510.excel.SaveData2DB;
10
11 /**
12 * @authorHongten
13 * @created -5-18
14 */
15 public classClient {
16
17 public static void main(String[] args) throwsIOException, SQLException {
18 SaveData2DB saveData2DB = newSaveData2DB();
19 saveData2DB.save();
20 System.out.println("end");
21 }
22 }
/ExcelTest/src/com/b510/common/Common.java
1 /**
2 *
3 */
4 mon;
5
6 /**
7 * @authorHongten
8 * @created -5-18
9 */
10 public classCommon {
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 packagecom.b510.excel;
5
6 importjava.io.FileInputStream;
7 importjava.io.IOException;
8 importjava.io.InputStream;
9 importjava.util.ArrayList;
10 importjava.util.List;
11
12 importorg.apache.poi.hssf.usermodel.HSSFCell;
13 importorg.apache.poi.hssf.usermodel.HSSFRow;
14 importorg.apache.poi.hssf.usermodel.HSSFSheet;
15 importorg.apache.poi.hssf.usermodel.HSSFWorkbook;
16
17 mon;
18 importcom.b510.excel.vo.Student;
19
20 /**
21 * @authorHongten
22 * @created -5-18
23 */
24 public classReadExcel {
25
26 public List readXls() throwsIOException {
27 InputStream is = newFileInputStream(Common.EXCEL_PATH);
28 HSSFWorkbook hssfWorkbook = newHSSFWorkbook(is);
29 Student student = null;
30 List list = new ArrayList();
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 = newStudent();
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 returnlist;
55 }
56
57 @SuppressWarnings("static-access")
58 privateString getValue(HSSFCell hssfCell) {
59 if (hssfCell.getCellType() ==hssfCell.CELL_TYPE_BOOLEAN) {
60 //返回布尔类型的值
61 returnString.valueOf(hssfCell.getBooleanCellValue());
62 } else if (hssfCell.getCellType() ==hssfCell.CELL_TYPE_NUMERIC) {
63 //返回数值类型的值
64 returnString.valueOf(hssfCell.getNumericCellValue());
65 } else{
66 //返回字符串类型的值
67 returnString.valueOf(hssfCell.getStringCellValue());
68 }
69 }
70 }
/ExcelTest/src/com/b510/excel/SaveData2DB.java
1 /**
2 *
3 */
4 packagecom.b510.excel;
5
6 importjava.io.IOException;
7 importjava.sql.SQLException;
8 importjava.util.List;
9
10 mon;
11 importcom.b510.excel.util.DbUtil;
12 importcom.b510.excel.vo.Student;
13
14 /**
15 * @authorHongten
16 * @created -5-18
17 */
18 public classSaveData2DB {
19
20 @SuppressWarnings({ "rawtypes"})
21 public void save() throwsIOException, SQLException {
22 ReadExcel xlsMain = newReadExcel();
23 Student student = null;
24 List 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 packagecom.b510.excel.util;
5
6 importjava.sql.Connection;
7 importjava.sql.DriverManager;
8 importjava.sql.PreparedStatement;
9 importjava.sql.ResultSet;
10 importjava.sql.SQLException;
11 importjava.util.ArrayList;
12 importjava.util.List;
13
14 mon;
15 importcom.b510.excel.vo.Student;
16
17 /**
18 * @authorHongten
19 * @created -5-18
20 */
21 public classDbUtil {
22
23 /**
24 * @paramsql
25 */
26 public static void insert(String sql, Student student) throwsSQLException {
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) throwsSQLException {
55 Connection conn = null;
56 PreparedStatement ps = null;
57 ResultSet rs = null;
58 List list = newArrayList();
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 packagecom.b510.excel.vo;
5
6 /**
7 * Student
8 *
9 * @authorHongten
10 * @created -5-18
11 */
12 public classStudent {
13 /**
14 * id
15 */
16 privateInteger id;
17 /**
18 * 学号
19 */
20 privateString no;
21 /**
22 * 姓名
23 */
24 privateString name;
25 /**
26 * 学院
27 */
28 privateString age;
29 /**
30 * 成绩
31 */
32 private floatscore;
33
34 publicInteger getId() {
35 returnid;
36 }
37
38 public voidsetId(Integer id) {
39 this.id =id;
40 }
41
42 publicString getNo() {
43 returnno;
44 }
45
46 public voidsetNo(String no) {
47 this.no =no;
48 }
49
50 publicString getName() {
51 returnname;
52 }
53
54 public voidsetName(String name) {
55 this.name =name;
56 }
57
58 publicString getAge() {
59 returnage;
60 }
61
62 public voidsetAge(String age) {
63 this.age =age;
64 }
65
66 public floatgetScore() {
67 returnscore;
68 }
69
70 public void setScore(floatscore) {
71 this.score =score;
72 }
73
74 }
转载：/hongten/p/java_poi_excel.html
