freemarker，,import java.

freemarker，,import java.

import java.io.BufferedWriter;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.StringWriter;import java.io.Writer;import java.util.Map;import com.viewlinecn.consts.WebConst;import freemarker.template.Configuration;import freemarker.template.DefaultObjectWrapper;import freemarker.template.Template;import freemarker.template.TemplateException;import freemarker.template.TemplateExceptionHandler;/** * FreeMarker操作类 *  * @author sunjun *  */public class FreeMarkerUtil { /**  * 定义FreeMarker Configuration对象config  */ private Configuration config = null; /**  * 编码  */ private String encoding = "gbk"; /**  * FreeMarkerUtil对象FREEMARKER  */ private static final FreeMarkerUtil FREEMARKER = new FreeMarkerUtil(); /**  * 构造方法  *   * @throws IOException  */ private FreeMarkerUtil() {  try {   config = new Configuration();   config.setDirectoryForTemplateLoading(new File(     WebConst.APPLICATION_REAL_PATH));   // config.setTemplateLoader(getTemplateLoader(servletContext));   config     .setTemplateExceptionHandler(TemplateExceptionHandler.HTML_DEBUG_HANDLER);   config.setDefaultEncoding(encoding);   config.setObjectWrapper(new DefaultObjectWrapper());  } catch (IOException e) {   e.printStackTrace();  } } /**  * 得到FreeMarkerUtil对象  *   * @return FreeMarkerUtil对象  */ public static FreeMarkerUtil getInstance() {  return FREEMARKER; } /**  * @param config  *            the config to set  */ public void setConfig(Configuration config) {  this.config = config; } /**  * 设置编码  *   * @param encoding  *            the encoding to set  */ public void setEncoding(String encoding) {  this.encoding = encoding; } /**  * 生成静态页面  *   * @param ftlFile  *            模板文件(相对根目录的绝对路径，以/开头)  * @param data  *            数据Map  * @param file  *            生成的文件  * @throws IOException  * @throws TemplateException  */ public void createHTML(String ftlFile, Map data, File file)   throws IOException, TemplateException {  Writer out = null;  FileOutputStream output = null;  try {   Template template = config.getTemplate(ftlFile);   output = new FileOutputStream(file);   out = new OutputStreamWriter(output, encoding);   template.process(data, out);  } catch (Exception ex) {   ex.printStackTrace();  } finally {   // 关闭out output   if (out != null) {    out.flush();    out.close();   }   if (output != null) {    output.flush();    output.close();   }  } } /**  * 输出到字符串  *   * @param ftlFile  *            模板文件(相对根目录的绝对路径，以/开头)  * @param data  *            数据Map  * @return 结果字符串  */ public String getString(String ftlFile, Map data) {  StringWriter writer = null;  String result = "";  try {   Template template = config.getTemplate(ftlFile);   template.setEncoding(encoding);   writer = new StringWriter();   template.process(data, writer);   result = writer.toString();  } catch (Exception e) {   e.printStackTrace();  } finally {   // 关闭write   try {    if (writer != null) {     writer.flush();     writer.close();    }   } catch (Exception ex) {    ex.printStackTrace();   }  }  return result; } /**  * 输出到内存  *   * @param ftlFile  *            模板文件(相对模板文件目录的相对路径)  * @param data  *            数据Map  * @return ByteArrayOutputStream  * @throws IOException  */ public ByteArrayOutputStream createByteArray(String ftlFile, Map data)   throws IOException {  ByteArrayOutputStream os = null;  BufferedWriter writer = null;  try {   Template template = config.getTemplate(ftlFile);   template.setEncoding(encoding);   os = new ByteArrayOutputStream();   writer = new BufferedWriter(new OutputStreamWriter(os));   template.process(data, writer);  } catch (Exception e) {   e.printStackTrace();  } finally {   // 关闭os write   if (writer != null) {    writer.flush();    writer.close();   }   if (os != null) {    os.flush();    os.close();   }  }  return os; }}//该片段来自于http://byrx.net