java导出Excel文档

package com.test3;

import java.io.File;
import java.io.FileOutputStream;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.util.CellRangeAddress;

public class ExcelUtil {
public static boolean exportExcel(List<Map<String, Object>> dataList,Map<String, String> titleMap,File file){
boolean flag=true;
if (dataList==null||dataList.size()==0) {
return false;
}
if (titleMap==null||titleMap.size()==0) {
return false;
}
//创建一个workbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();

//在workbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("sheet1");

//表头样式和字体
HSSFCellStyle titleStyle = wb.createCellStyle();
titleStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
titleStyle.setBorderTop((short)1);
titleStyle.setBorderLeft((short)1);
titleStyle.setBorderRight((short)1);
titleStyle.setBorderBottom((short)1);

Font titleFont = wb.createFont();
titleFont.setFontHeightInPoints((short)20);   //--->设置字体大小
titleFont.setFontName("宋体");   //--->设置字体，是什么类型例如：宋体
titleStyle.setFont(titleFont);

//数据单元格样式、字体
HSSFCellStyle cellStyle = wb.createCellStyle();
cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
cellStyle.setBorderTop((short)1);
cellStyle.setBorderLeft((short)1);
cellStyle.setBorderRight((short)1);
cellStyle.setBorderBottom((short)1);

Font colTitleFont = wb.createFont();
colTitleFont.setFontHeightInPoints((short)16);   //--->设置字体大小
colTitleFont.setFontName("宋体");   //--->设置字体，是什么类型例如：宋体
cellStyle.setFont(colTitleFont);

//创建标题行
HSSFRow rowOne = sheet.createRow(0);
rowOne.setHeightInPoints(30);//设置标题行高
//合并单元格   四个参数分别是：起始行，结束行，起始列，结束列
sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, titleMap.size()-1));
HSSFCell cell1 = rowOne.createCell(0);
cell1.setCellType(HSSFCell.CELL_TYPE_STRING);
cell1.setCellStyle(titleStyle);
cell1.setCellValue("导出列表");

//创建表头行
HSSFRow title_row = sheet.createRow(1);
title_row.setHeightInPoints(25);//设置表头行高

//创建表头行单元格、添加各表头
HSSFCell title_cell = null;
int i=0;
for(Entry<String, String> entity : titleMap.entrySet()){
sheet.setColumnWidth(i, (short) (35.7 * 200));//设置列宽
title_cell = title_row.createCell(i);
title_cell.setCellType(HSSFCell.CELL_TYPE_STRING);//设置表头单元格类型
title_cell.setCellStyle(titleStyle);//应用表头样式
title_cell.setCellValue(entity.getValue());
i++;
}

//加入数据
HSSFRow row = null;
HSSFCell cell = null;
for(int j = 0; j<dataList.size(); j++){
Map<String, Object> entity = (Map<String, Object>) dataList.get(j);
int ii = 0;
row = sheet.createRow(j+2);
for(Entry<String, String> title : titleMap.entrySet()){
cell = row.createCell(ii);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellStyle(cellStyle);//应用内容单元格样式
if(entity.get(title.getKey())!=null){
cell.setCellValue(entity.get(title.getKey()).toString());
}else {
cell.setCellValue("");
}
ii++;
}
}
try {
FileOutputStream f = new FileOutputStream(file);
wb.write(f);//写入文件
f.flush();
f.close();
} catch (Exception e) {
e.printStackTrace();
flag=false;
}
return flag;

}
}

package com.test3;

import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

public class Test {

public static void main(String[] args) {
String driver = "oracle.jdbc.driver.OracleDriver";
// 要访问的数据库
String url = "jdbc:oracle:thin:@192.168.1.5:1521:orcl";
String user = "orcl";
String password = "orcl";
try {
// 加载驱动程序
Class.forName(driver);
// 连续数据库
Connection conn = DriverManager.getConnection(url, user, password);
if (!conn.isClosed())
System.out.println("----------start----------");
String sql = "select c.special_plan_id,c.plan_name,c.begin_time,c.end_time,c.corp_id,c.dep_id,c.user_id,"
+ "c.state,c.method,c.low_risk,c.high_risk,to_char(c.make_time,'YYYY-mm-dd') make_time,"
+ "c.type from check_specialplan c";
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(sql);
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
while (rs.next()) {
Map<String, Object> map = new HashMap<String, Object>();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
map.put(rs.getMetaData().getColumnName(i), rs.getObject(i));
}
list.add(map);
}
rs.close();
st.close();
conn.close();

Map<String, String> titleMap = new LinkedHashMap<String, String>();
titleMap.put("SPECIAL_PLAN_ID", "id");
titleMap.put("PLAN_NAME", "计划名称");
titleMap.put("BEGIN_TIME", "开始时间");
titleMap.put("END_TIME", "结束时间");
titleMap.put("CORP_ID", "公司id");
titleMap.put("DEP_ID", "部门id");
titleMap.put("USER_ID", "制定人id");
titleMap.put("STATE", "状态");
titleMap.put("METHOD", "方法");
titleMap.put("LOW_RISK", "low");
titleMap.put("HIGH_RISK", "high");
titleMap.put("MAKE_TIME", "制定时间");
titleMap.put("TYPE", "类型");
ExcelUtil.exportExcel(list, titleMap, new File("E:\\桌面\\123.xls"));

System.out.println("-----------end-----------");
} catch (Exception e) {
e.printStackTrace();
}
}
}