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
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public class PageData extends HashMap implements Map{
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private static final long serialVersionUID = 1L;
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Map map = null;
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HttpServletRequest request;
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public PageData(HttpServletRequest request){
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this.request = request;
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Map properties = request.getParameterMap();
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Map returnMap = new HashMap();
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Iterator entries = properties.entrySet().iterator();
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Map.Entry entry;
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String name = "";
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String value = "";
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while (entries.hasNext()) {
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entry = (Map.Entry) entries.next();
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name = (String) entry.getKey();
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Object valueObj = entry.getValue();
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if(null == valueObj){
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value = "";
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}else if(valueObj instanceof String[]){
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String[] values = (String[])valueObj;
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for(int i=0;i<values.length;i++){
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value = values[i] + ",";
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}
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value = value.substring(0, value.length()-1);
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}else{
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value = valueObj.toString();
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}
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returnMap.put(name, value);
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}
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map = returnMap;
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}
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public PageData() {
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map = new HashMap();
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}
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@Override
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public Object get(Object key) {
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Object obj = null;
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if(map.get(key) instanceof Object[]) {
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Object[] arr = (Object[])map.get(key);
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obj = request == null ? arr:(request.getParameter((String)key) == null ? arr:arr[0]);
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} else {
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obj = map.get(key);
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}
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return obj;
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}
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public String getString(Object key) {
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return (String)get(key);
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}
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@SuppressWarnings("unchecked")
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@Override
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public Object put(Object key, Object value) {
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return map.put(key, value);
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}
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@Override
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public Object remove(Object key) {
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return map.remove(key);
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}
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public void clear() {
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map.clear();
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}
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public boolean containsKey(Object key) {
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// TODO Auto-generated method stub
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return map.containsKey(key);
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}
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public boolean containsValue(Object value) {
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// TODO Auto-generated method stub
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return map.containsValue(value);
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}
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public Set entrySet() {
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// TODO Auto-generated method stub
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return map.entrySet();
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}
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public boolean isEmpty() {
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// TODO Auto-generated method stub
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return map.isEmpty();
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}
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public Set keySet() {
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// TODO Auto-generated method stub
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return map.keySet();
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}
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@SuppressWarnings("unchecked")
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public void putAll(Map t) {
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// TODO Auto-generated method stub
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map.putAll(t);
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}
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public int size() {
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// TODO Auto-generated method stub
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return map.size();
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}
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public Collection values() {
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// TODO Auto-generated method stub
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return map.values();
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}
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}
写个实体类：
会员类
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public class Member {
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/**
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* 会员账号
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*/
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private String memberID;
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/**
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* 会员密码
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*/
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private String password;
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/**
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* 会员级别
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*/
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private String rank;
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/**
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* 会员积分
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*/
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private int credit;
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/**
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* 会员手机号
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*/
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private String phone;
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/**
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* 会员皮肤
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*/
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private String imgPath;
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private List<GroupPost> postes;
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public List<GroupPost> getPostes() {
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return postes;
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}
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public void setPostes(List<GroupPost> postes) {
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this.postes = postes;
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}
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public String getMemberID() {
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return memberID;
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}
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public void setMemberID(String memberID) {
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this.memberID = memberID;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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public String getRank() {
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return rank;
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}
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public void setRank(String rank) {
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this.rank = rank;
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}
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public int getCredit() {
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return credit;
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}
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public void setCredit(int credit) {
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this.credit = credit;
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}
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public String getPhone() {
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return phone;
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}
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public void setPhone(String phone) {
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this.phone = phone;
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}
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public String getImgPath() {
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return imgPath;
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}
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public void setImgPath(String imgPath) {
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this.imgPath = imgPath;
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}
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}
DAO.java
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package com.appweb.core.dao;
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public interface DAO {
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/**
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* 保存对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object save(String str, Object obj) throws Exception;
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/**
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* 修改对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object update(String str, Object obj) throws Exception;
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/**
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* 删除对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object delete(String str, Object obj) throws Exception;
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/**
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* 查找对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object findForObject(String str, Object obj) throws Exception;
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/**
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* 查找对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object findForList(String str, Object obj) throws Exception;
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/**
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* 查找对象封装成Map
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* @param s
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object findForMap(String sql, Object obj, String key , String value) throws Exception;
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}
DAOSupport类：
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package com.appweb.core.dao;
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import java.util.List;
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import javax.annotation.Resource;
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import org.apache.ibatis.session.ExecutorType;
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import org.apache.ibatis.session.SqlSession;
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import org.apache.ibatis.session.SqlSessionFactory;
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import org.mybatis.spring.SqlSessionTemplate;
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import org.springframework.stereotype.Repository;
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@Repository("daoSupport")
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public class DaoSupport implements DAO {
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@Resource(name = "sqlSessionTemplate")
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private SqlSessionTemplate sqlSessionTemplate;
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/**
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* 保存对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object save(String str, Object obj) throws Exception {
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return sqlSessionTemplate.insert(str, obj);
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}
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/**
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* 批量更新
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object batchSave(String str, List objs )throws Exception{
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return sqlSessionTemplate.insert(str, objs);
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}
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/**
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* 修改对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object update(String str, Object obj) throws Exception {
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return sqlSessionTemplate.update(str, obj);
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}
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/**
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* 批量更新
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public void batchUpdate(String str, List objs )throws Exception{
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SqlSessionFactory sqlSessionFactory = sqlSessionTemplate.getSqlSessionFactory();
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//批量执行器
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SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH,false);
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try{
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if(objs!=null){
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for(int i=0,size=objs.size();i<size;i++){
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sqlSession.update(str, objs.get(i));
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}
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sqlSession.flushStatements();
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sqlSession.commit();
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sqlSession.clearCache();
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}
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}finally{
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sqlSession.close();
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}
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}
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/**
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* 批量更新
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object batchDelete(String str, List objs )throws Exception{
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return sqlSessionTemplate.delete(str, objs);
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}
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/**
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* 删除对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object delete(String str, Object obj) throws Exception {
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return sqlSessionTemplate.delete(str, obj);
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}
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/**
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* 查找对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object findForObject(String str, Object obj) throws Exception {
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return sqlSessionTemplate.selectOne(str, obj);
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}
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/**
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* 查找对象
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* @param str
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* @param obj
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* @return
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* @throws Exception
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*/
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public Object findForList(String str, Object obj) throws Exception {
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return sqlSessionTemplate.selectList(str, obj);
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}
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public Object findForMap(String str, Object obj, String key, String value) throws Exception {
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return sqlSessionTemplate.selectMap(str, obj, key);
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}
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}
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写个Service类:
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/**
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* 会员信息列表
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* @param pd
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* @return
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* @throws Exception
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*/
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public List<PageData> listM(PageData pd)throws Exception{
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return (List<PageData>)dao.findForList("MemberMapper.memberList", pd);
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}
ObjectExcelView.java:
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package com.appweb.core.view;
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import java.util.Date;
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import java.util.List;
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import java.util.Map;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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import org.apache.poi.hssf.usermodel.HSSFFont;
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import org.apache.poi.hssf.usermodel.HSSFSheet;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import org.springframework.web.servlet.view.document.AbstractExcelView;
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import com.appweb.core.entity.PageData;
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import com.appweb.core.utils.Tools;
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/**
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* 导入到EXCEL
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* 类名称：ObjectExcelView.java
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* 类描述：
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*/
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public class ObjectExcelView extends AbstractExcelView{
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@Override
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protected void buildExcelDocument(Map<String, Object> model,
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HSSFWorkbook workbook, HttpServletRequest request,
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HttpServletResponse response) throws Exception {
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// TODO Auto-generated method stub
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Date date = new Date();
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String filename = Tools.date2Str(date, "yyyyMMddHHmmss");
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HSSFSheet sheet;
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HSSFCell cell;
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response.setContentType("application/octet-stream");
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response.setHeader("Content-Disposition", "attachment;filename="+filename+".xls");
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sheet = workbook.createSheet("sheet1");
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List<String> titles = (List<String>) model.get("titles");
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int len = titles.size();
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HSSFCellStyle headerStyle = workbook.createCellStyle(); //标题样式
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headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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headerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
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HSSFFont headerFont = workbook.createFont(); //标题字体
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headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
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headerFont.setFontHeightInPoints((short)11);
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headerStyle.setFont(headerFont);
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short width = 20,height=25*20;
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sheet.setDefaultColumnWidth(width);
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for(int i=0; i<len; i++){ //设置标题
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String title = titles.get(i);
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cell = getCell(sheet, 0, i);
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cell.setCellStyle(headerStyle);
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setText(cell,title);
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}
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sheet.getRow(0).setHeight(height);
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HSSFCellStyle contentStyle = workbook.createCellStyle(); //内容样式
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contentStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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List<PageData> varList = (List<PageData>) model.get("varList");
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int varCount = varList.size();
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for(int i=0; i<varCount; i++){
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PageData vpd = varList.get(i);
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for(int j=0;j<len;j++){
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String varstr = vpd.getString("var"+(j+1)) != null ? vpd.getString("var"+(j+1)) : "";
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cell = getCell(sheet, i+1, j);
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cell.setCellStyle(contentStyle);
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setText(cell,varstr);
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}
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}
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}
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}
控制类导出Excel表：
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/**
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* 导出Excel
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* @return
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* @throws Exception
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*/
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@RequestMapping("/exportExcel")
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public ModelAndView exportExcel()throws Exception{
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ModelAndView mv = this.getModelAndView();
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PageData pd = new PageData();
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pd = this.getPageData();
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//检索条件
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Map<String,Object> dataMap = new HashMap<String,Object>();
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List<String> titles = new ArrayList<String>();
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titles.add("用户名");
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titles.add("密码");
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titles.add("级别");
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titles.add("积分");
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titles.add("手机号");
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dataMap.put("titles", titles);
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List<PageData> memberList = memberService.listM(pd);
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List<PageData> varList = new ArrayList<PageData>();
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for(int i=0;i<memberList.size();i++){
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PageData vpd = new PageData();
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vpd.put("var1", memberList.get(i).getString("memberID"));
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vpd.put("var2", memberList.get(i).getString("password"));
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vpd.put("var3", memberList.get(i).getString("rank"));
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vpd.put("var4", memberList.get(i).get("credit").toString());
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vpd.put("var5", memberList.get(i).getString("phone"));
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varList.add(vpd);
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}
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dataMap.put("varList", varList);
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ObjectExcelView erv = new ObjectExcelView();
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mv = new ModelAndView(erv,dataMap);
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return mv;
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}
文章来源: smilenicky.blog.csdn.net，作者：smileNicky，版权归原作者所有，如需转载，请联系作者。
原文链接：smilenicky.blog.csdn.net/article/details/52526551