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 ： 了解到写入Excel的方法信息
使用JXL技术可以在 ：
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 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：
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源码部分：
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/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 Hongten13 * @created 2014-5-1814 */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 database13 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 // common22 public static final String EXCEL_PATH = "lib/student_info.xls";23 24 // sql25 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 Hongten22 * @created 2014-5-1823 */24 public class ReadExcel {25 26 public List readXls() throws IOException {27 InputStream is = new FileInputStream(Common.EXCEL_PATH);28 HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);29 Student student = null;30 List list = new ArrayList ();31 // 循环工作表Sheet32 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Row38 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 Hongten16 * @created 2014-5-1817 */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 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 Hongten10 * @created 2014-5-1811 */12 public class Student {13 /**14 * id15 */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：
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多读一些书，英语很重要。
More reading,and english is important.
I'm Hongten
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