SSM框架系列之使用POI技术导出Excel表

POI框架是Apache开源的可以导出导入Excel表的，本博客介绍在SSM(Spring+SpringMVC+Mybatis)项目里，如何使用POI框架，导出Excel表

这里我们先要去Apache官网下载jar

然后，就可以先编程了

先提供一个封装的httpservlet请求和添加数据的类

public class PageData extends HashMap implements Map{
	
	private static final long serialVersionUID = 1L;
	
	Map map = null;
	HttpServletRequest request;
	
	public PageData(HttpServletRequest request){
		this.request = request;
		Map properties = request.getParameterMap();
		Map returnMap = new HashMap(); 
		Iterator entries = properties.entrySet().iterator(); 
		Map.Entry entry; 
		String name = "";  
		String value = "";  
		while (entries.hasNext()) {
			entry = (Map.Entry) entries.next(); 
			name = (String) entry.getKey(); 
			Object valueObj = entry.getValue(); 
			if(null == valueObj){ 
				value = ""; 
			}else if(valueObj instanceof String[]){ 
				String[] values = (String[])valueObj;
				for(int i=0;i<values.length;i++){ 
					 value = values[i] + ",";
				}
				value = value.substring(0, value.length()-1); 
			}else{
				value = valueObj.toString(); 
			}
			returnMap.put(name, value); 
		}
		map = returnMap;
	}
	
	public PageData() {
		map = new HashMap();
	}
	
	@Override
	public Object get(Object key) {
		Object obj = null;
		if(map.get(key) instanceof Object[]) {
			Object[] arr = (Object[])map.get(key);
			obj = request == null ? arr:(request.getParameter((String)key) == null ? arr:arr[0]);
		} else {
			obj = map.get(key);
		}
		return obj;
	}
	
	public String getString(Object key) {
		return (String)get(key);
	}
	
	@SuppressWarnings("unchecked")
	@Override
	public Object put(Object key, Object value) {
		return map.put(key, value);
	}
	
	@Override
	public Object remove(Object key) {
		return map.remove(key);
	}

	public void clear() {
		map.clear();
	}

	public boolean containsKey(Object key) {
		// TODO Auto-generated method stub
		return map.containsKey(key);
	}

	public boolean containsValue(Object value) {
		// TODO Auto-generated method stub
		return map.containsValue(value);
	}

	public Set entrySet() {
		// TODO Auto-generated method stub
		return map.entrySet();
	}

	public boolean isEmpty() {
		// TODO Auto-generated method stub
		return map.isEmpty();
	}

	public Set keySet() {
		// TODO Auto-generated method stub
		return map.keySet();
	}

	@SuppressWarnings("unchecked")
	public void putAll(Map t) {
		// TODO Auto-generated method stub
		map.putAll(t);
	}

	public int size() {
		// TODO Auto-generated method stub
		return map.size();
	}

	public Collection values() {
		// TODO Auto-generated method stub
		return map.values();
	}
	
}

写个实体类：

会员类

public class Member {
	
	/**
	 * 会员账号
	 */
	private String memberID;
	
	/**
	 * 会员密码
	 */
	private String password;
	
	/**
	 * 会员级别
	 */
	private String rank;
	
	/**
	 * 会员积分
	 */
	private int credit;
	
	/**
	 * 会员手机号
	 */
	private String phone;
	
	/**
	 * 会员皮肤
	 */
	private String imgPath;
	
	private List<GroupPost> postes;

	public List<GroupPost> getPostes() {
		return postes;
	}

	public void setPostes(List<GroupPost> postes) {
		this.postes = postes;
	}

	public String getMemberID() {
		return memberID;
	}

	public void setMemberID(String memberID) {
		this.memberID = memberID;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getRank() {
		return rank;
	}

	public void setRank(String rank) {
		this.rank = rank;
	}

	public int getCredit() {
		return credit;
	}

	public void setCredit(int credit) {
		this.credit = credit;
	}

	public String getPhone() {
		return phone;
	}

	public void setPhone(String phone) {
		this.phone = phone;
	}

	public String getImgPath() {
		return imgPath;
	}

	public void setImgPath(String imgPath) {
		this.imgPath = imgPath;
	}
	
}

DAO.java

package com.appweb.core.dao;

public interface DAO {
	
	/**
	 * 保存对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object save(String str, Object obj) throws Exception;
	
	/**
	 * 修改对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object update(String str, Object obj) throws Exception;
	
	/**
	 * 删除对象 
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object delete(String str, Object obj) throws Exception;

	/**
	 * 查找对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object findForObject(String str, Object obj) throws Exception;

	/**
	 * 查找对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object findForList(String str, Object obj) throws Exception;
	
	/**
	 * 查找对象封装成Map
	 * @param s
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object findForMap(String sql, Object obj, String key , String value) throws Exception;
	
}

DAOSupport类：

package com.appweb.core.dao;

import java.util.List;

import javax.annotation.Resource;

import org.apache.ibatis.session.ExecutorType;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.stereotype.Repository;

@Repository("daoSupport")
public class DaoSupport implements DAO {

	@Resource(name = "sqlSessionTemplate")
	private SqlSessionTemplate sqlSessionTemplate;
	
	/**
	 * 保存对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object save(String str, Object obj) throws Exception {
		return sqlSessionTemplate.insert(str, obj);
	}
	
	/**
	 * 批量更新
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object batchSave(String str, List objs )throws Exception{
		return sqlSessionTemplate.insert(str, objs);
	}
	
	/**
	 * 修改对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object update(String str, Object obj) throws Exception {
		return sqlSessionTemplate.update(str, obj);
	}

	/**
	 * 批量更新
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public void batchUpdate(String str, List objs )throws Exception{
		SqlSessionFactory sqlSessionFactory = sqlSessionTemplate.getSqlSessionFactory();
		//批量执行器
		SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH,false);
		try{
			if(objs!=null){
				for(int i=0,size=objs.size();i<size;i++){
					sqlSession.update(str, objs.get(i));
				}
				sqlSession.flushStatements();
				sqlSession.commit();
				sqlSession.clearCache();
			}
		}finally{
			sqlSession.close();
		}
	}
	
	/**
	 * 批量更新
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object batchDelete(String str, List objs )throws Exception{
		return sqlSessionTemplate.delete(str, objs);
	}
	
	/**
	 * 删除对象 
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object delete(String str, Object obj) throws Exception {
		return sqlSessionTemplate.delete(str, obj);
	}
	 
	/**
	 * 查找对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object findForObject(String str, Object obj) throws Exception {
		return sqlSessionTemplate.selectOne(str, obj);
	}

	/**
	 * 查找对象
	 * @param str
	 * @param obj
	 * @return
	 * @throws Exception
	 */
	public Object findForList(String str, Object obj) throws Exception {
		return sqlSessionTemplate.selectList(str, obj);
	}
	
	public Object findForMap(String str, Object obj, String key, String value) throws Exception {
		return sqlSessionTemplate.selectMap(str, obj, key);
	}
	
}

写个Service类:

/**
	 * 会员信息列表
	 * @param pd
	 * @return
	 * @throws Exception
	 */
	public List<PageData> listM(PageData pd)throws Exception{
		return (List<PageData>)dao.findForList("MemberMapper.memberList", pd);
	}

ObjectExcelView.java:

package com.appweb.core.view;

import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.springframework.web.servlet.view.document.AbstractExcelView;

import com.appweb.core.entity.PageData;
import com.appweb.core.utils.Tools;

/**
* 导入到EXCEL
* 类名称：ObjectExcelView.java
* 类描述： 
 */
public class ObjectExcelView extends AbstractExcelView{

	@Override
	protected void buildExcelDocument(Map<String, Object> model,
			HSSFWorkbook workbook, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		Date date = new Date();
		String filename = Tools.date2Str(date, "yyyyMMddHHmmss");
		HSSFSheet sheet;
		HSSFCell cell;
		response.setContentType("application/octet-stream");
		response.setHeader("Content-Disposition", "attachment;filename="+filename+".xls");
		sheet = workbook.createSheet("sheet1");
		
		List<String> titles = (List<String>) model.get("titles");
		int len = titles.size();
		HSSFCellStyle headerStyle = workbook.createCellStyle(); //标题样式
		headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		headerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		HSSFFont headerFont = workbook.createFont();	//标题字体
		headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		headerFont.setFontHeightInPoints((short)11);
		headerStyle.setFont(headerFont);
		short width = 20,height=25*20;
		sheet.setDefaultColumnWidth(width);
		for(int i=0; i<len; i++){ //设置标题
			String title = titles.get(i);
			cell = getCell(sheet, 0, i);
			cell.setCellStyle(headerStyle);
			setText(cell,title);
		}
		sheet.getRow(0).setHeight(height);
		
		HSSFCellStyle contentStyle = workbook.createCellStyle(); //内容样式
		contentStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		List<PageData> varList = (List<PageData>) model.get("varList");
		int varCount = varList.size();
		for(int i=0; i<varCount; i++){
			PageData vpd = varList.get(i);
			for(int j=0;j<len;j++){
				String varstr = vpd.getString("var"+(j+1)) != null ? vpd.getString("var"+(j+1)) : "";
				cell = getCell(sheet, i+1, j);
				cell.setCellStyle(contentStyle);
				setText(cell,varstr);
			}
			
		}
		
	}

}

控制类导出Excel表：

/**
	 * 导出Excel
	 * @return
	 * @throws Exception
	 */
	@RequestMapping("/exportExcel")
	public ModelAndView exportExcel()throws Exception{
		ModelAndView mv = this.getModelAndView();
		PageData pd = new PageData();
		pd = this.getPageData();
		//检索条件
		Map<String,Object> dataMap = new HashMap<String,Object>();
		List<String> titles = new ArrayList<String>();
		
		titles.add("用户名");
		titles.add("密码");
		titles.add("级别");
		titles.add("积分");
		titles.add("手机号");
		
		dataMap.put("titles", titles);
		
		List<PageData> memberList = memberService.listM(pd);
		List<PageData> varList = new ArrayList<PageData>();
		for(int i=0;i<memberList.size();i++){
			PageData vpd = new PageData();
			vpd.put("var1", memberList.get(i).getString("memberID"));
			vpd.put("var2", memberList.get(i).getString("password"));
			vpd.put("var3", memberList.get(i).getString("rank"));
			vpd.put("var4", memberList.get(i).get("credit").toString());
			vpd.put("var5", memberList.get(i).getString("phone"));
			varList.add(vpd);
		}
		dataMap.put("varList", varList);
		ObjectExcelView erv = new ObjectExcelView();
		mv = new ModelAndView(erv,dataMap);
		
		return mv;
	}

SSM框架系列之使用POI技术导出Excel表

测试

测试

继续阅读