velocity导出Word，excel模板的工具类

public class VelocityUtil {

/**
* 将内容写到vm模板中,存放在指定目录下
* VelocityContext 传送内容类
* list 数据集合
* colMap 列名字
* templetePath 模板
* */
public static void createDoc(List list, String templetePath,String docpath,Map<String,String> colMap) throws Exception {
VelocityContext vc = new VelocityContext();  //传到vm的内容
String classpath = VelocityUtil.class.getResource("/").getPath();
Properties ps = new Properties();
ps.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH,
classpath.substring(0, classpath.length()-8) + "template/import");// 这是模板所在路径
VelocityEngine ve = new VelocityEngine();
ve.init(ps);
Template template = ve.getTemplate(templetePath+".vm", "utf-8");
File srcFile = new File(docpath);//输出路径
FileOutputStream fos = new FileOutputStream(srcFile);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos, "utf-8"));
Set<String> cols = colMap.keySet();
List<String> colspan = new ArrayList<>();
for (String col : cols) {
colspan.add(colMap.get(col).replace("\"", ""));
}
vc.put("list", list);//数据集合
vc.put("cols", colspan);//列集合
template.merge(vc, writer);
writer.flush();
writer.close();
fos.close();
}

/**
* 由浏览器下载导出的表格
* @param list
* @param templeteName 模板名称
* @param excelName 导出表格名称
* @param response
* @param colMap 列
*/
public static void createDoc(List list, String templeteName, String excelName,
HttpServletResponse response, Map<String, String> colMap) {
try {
VelocityContext vc = new VelocityContext();  //传到vm的内容
String classpath = VelocityUtil.class.getResource("/").getPath();
Properties ps = new Properties();
ps.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH,
classpath.substring(0, classpath.length()-8) + "template/import");// 这是模板所在路径
VelocityEngine ve = new VelocityEngine();
ve.init(ps);
Template template = ve.getTemplate(templeteName+".vm", "utf-8");
List<String> helpList = new ArrayList<String>(colMap.keySet());
Collections.sort(helpList, new Comparator<String>() {
public int compare(String a, String b) {
return a.compareTo(b);
}
});
Set<String> cols = new TreeSet<String>(helpList);
List<String> colsEN = new ArrayList<>();
List<String> colsCN = new ArrayList<>();
for (String col : cols) {
colsCN.add(colMap.get(col).replace("\"", ""));
colsEN.add(col.split("_")[1]);
}
vc.put("list", list);//数据集合
vc.put("colsCN", colsCN);//列集合
vc.put("colsEN", colsEN);//列集合
response.addHeader("Cache-Control","no-cache");
response.setCharacterEncoding("UTF-8");
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
response.addHeader("Content-Disposition","attachment;filename=" + new String(excelName.getBytes(),"ISO8859-1"));
PrintWriter write = response.getWriter();
//解析模版
template.merge(vc, write);
if(write != null){
write.flush();
write.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}