利用java操作Excel表格(把Excel中的数据导入数据库中)

利用java操作Excel表格（把Excel中的数据导入数据库中）
0.加入依赖的jar文件

引用

*mysql的jar文件
*Spring_HOME/lib/poi/*.jar


1.编写数据库链接类

Java代码

package com.zzg.db;

import java.sql.Connection;
import java.sql.DriverManager;

public class DbUtils {
private static Connection conn;

static {
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost/test","root","123456");
} catch (Exception e) {
e.printStackTrace();
}
}

public static Connection getConn() {
return conn;
}

public static void setConn(Connection conn) {
DbUtils.conn = conn;
}
}


2.编写数据库操作类

Java代码

package com.zzg.db;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class ExcuteData {
private PreparedStatement pstmt;
public boolean ExcuData(String sql) {
Connection conn = DbUtils.getConn();
boolean flag=false;
try {
pstmt = conn.prepareStatement(sql);
flag=pstmt.execute();
} catch (SQLException e) {
e.printStackTrace();
}
return flag;
}
}


3.编写Excel表格实体类

Java代码

package com.zzg.model;

public class TableCell {
private String _name;
private String _value;

public String get_name() {
return _name;
}

public void set_name(String _name) {
this._name = _name;
}

public String get_value() {
return _value;
}

public void set_value(String _value) {
this._value = _value;
}
}


4.编写主键生成方法

Java代码

package com.zzg.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

public class GenericUtil {
public static String getPrimaryKey()
{
String primaryKey;
primaryKey = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
Random r = new Random();
primaryKey +=r.nextInt(100000)+100000;
return primaryKey;
}
}


5.编写Excel操作类

Java代码

package com.zzg.deployData;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import https://www.360docs.net/doc/f63770715.html,ermodel.HSSFCell;
import https://www.360docs.net/doc/f63770715.html,ermodel.HSSFRow;
import https://www.360docs.net/doc/f63770715.html,ermodel.HSSFSheet;
import https://www.360docs.net/doc/f63770715.html,ermodel.HSSFWorkbook;
import com.zzg.db.ExcuteData;
import com.zzg.model.TableCell;
import com.zzg.util.GenericUtil;

public class OperExcel {
private HSSFWorkbook workbook;
private String tableName;
private Class type;
private String sheetName;

public OperExcel(File excelFile, String tableName, Class type,
String sheetName) throws FileNotFoundException,
IOException {
workbook = new HSSFWorkbook(new FileInputStream(excelFile));
this.tab

leName = tableName;
this.type = type;
this.sheetName = sheetName;
InsertData();
}

// 向表中写入数据
public void InsertData() {
System.out.println("yyy");
ExcuteData excuteData = new ExcuteData();
List datas = getDatasInSheet(this.sheetName);
// 向表中添加数据之前先删除表中数据
String strSql = "delete from " + this.tableName;
excuteData.ExcuData(strSql);
// 拼接sql语句
for (int i = 1; i < datas.size(); i++) {
strSql = "insert into " + this.tableName + "(";
List row = datas.get(i);
for (short n = 0; n < row.size(); n++) {
TableCell excel = (TableCell) row.get(n);
if (n != row.size() - 1)
strSql += excel.get_name() + ",";
else
strSql += excel.get_name() + ")";
}
strSql += " values (";
for (short n = 0; n < row.size(); n++) {
TableCell excel = (TableCell) row.get(n);
try {
if (n != row.size() - 1) {
strSql += getTypeChangeValue(excel) + ",";
} else
strSql += getTypeChangeValue(excel) + ")";
} catch (RuntimeException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
//执行sql
excuteData.ExcuData(strSql);
}
}

/**
* 获得表中的数据
* @param sheetName 表格索引(EXCEL 是多表文档,所以需要输入表索引号)
* @return 由LIST构成的行和表
*/
public List getDatasInSheet(String sheetName) {
List result = new ArrayList();
// 获得指定的表
HSSFSheet sheet = workbook.getSheet(sheetName);
// 获得数据总行数
int rowCount = sheet.getLastRowNum();
if (rowCount < 1) {
return result;
}
// 逐行读取数据
for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) {
// 获得行对象
HSSFRow row = sheet.getRow(rowIndex);
if (row != null) {
List rowData = new ArrayList();
// 获得本行中单元格的个数
int columnCount = sheet.getRow(0).getLastCellNum();
// 获得本行中各单元格中的数据
for (short columnIndex = 0; columnIndex < columnCount; columnIndex++) {
HSSFCell cell = row.getCell(columnIndex);
// 获得指定单元格中数据
Object cellStr = this.getCellString(cell);
TableCell TableCell = new TableCell();
TableCell.set_name(getCellString(
sheet.getRow(0).getCell(columnIndex)).toString());
TableCell.set_value(cellStr == null ? "" : cellStr
.toString());
rowData.add(TableCell);
}
result.add(rowData);
}
}
return result;
}

/**
* 获得单元格中的内容
*
* @param cell
* @return result
*/
protected Object getCellString(HSSFCell cell) {
Object result = null;
if (cell != null) {
int cellType = cell.getCellType();
switch (cellType) {

case HSSFCell.CELL_TYPE_STRING:
result = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUM

ERIC:
result = cell.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_FORMULA:
result = cell.getNumericCellValue();
break;
case HSSFCell.CELL_TYPE_ERROR:
result = null;
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
result = cell.getBooleanCellValue();
break;
case HSSFCell.CELL_TYPE_BLANK:
result = null;
break;
}
}
return result;
}

// 根据类型返回相应的值
@SuppressWarnings("unchecked")
public String getTypeChangeValue(TableCell excelElement)
throws RuntimeException, Exception {
String colName = excelElement.get_name();
String colValue = excelElement.get_value();
String retValue = "";
if (colName.equals("id")) {
retValue = "'" + GenericUtil.getPrimaryKey() + "'";
return retValue;
}
if (colName == null) {
retValue = null;
}
if (colName.equals("class_createuser")) {
retValue = "yaa101";
return "'" + retValue + "'";
}
retValue = "'" + colValue + "'";
return retValue;
}
}


6.编写调用操作Excel类的方法

Java代码

package com.zzg.deployData;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

public class DeployData {
private File fileOut;

public void excute(String filepath) {
fileOut = new File(filepath);
this.deployUserInfoData();
}

public void deployUserInfoData() {
try {
new OperExcel(fileOut, "test", Object.class, "Sheet1");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}


7.编写客户端

Java代码
package com.zzg.client;

import com.zzg.deployData.DeployData;

public class DeployClient {
public static void main(String[] args) {
DeployData deployData = new DeployData();
deployData.excute("D://test.xls");
}
}