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package com.yiboshi.science.utils;
import com.baomidou.mybatisplus.core.toolkit.IOUtils;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;
import freemarker.cache.ClassTemplateLoader;
import freemarker.ext.beans.BeansWrapper;
import freemarker.ext.beans.BeansWrapperBuilder;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.lang.reflect.Field;
import java.net.URL;
import java.util.*;
public class HtmlBuilder {
private static final Logger LOGGER = LoggerFactory.getLogger(HtmlBuilder.class);
private ThreadLocal<Map<String, Object>> map = ThreadLocal.withInitial(HashMap::new);
private FreeMarkerConfigurer freeMarkerConfigurer;
public HtmlBuilder(FreeMarkerConfigurer freeMarkerConfigurer) {
this.freeMarkerConfigurer = freeMarkerConfigurer;
}
public static boolean loop(List<String> list, String value) {
for (String str : list) {
if (Objects.equals(str, value)) {
return true;
}
}
return false;
}
public void exportWord(Object dataModel, HttpServletRequest request, HttpServletResponse response) {
String url = request.getRequestURL().toString();
String s2 = url.substring(0,url.indexOf("v1"));
Map<String, Object> data1 = obj2Map(dataModel);
//这里是根据数据替换模板中的字段并返回一个字符串
String html = getHtmlText("tmp-pov.html",data1);
//对html中的中文进行Unicode编码,这里是最关键的一步，必须，不然导出的wordoffice打开乱码
html = EncodingUtil.setUrlForChn(html.replace("img src=\"","img src=\""+s2));
System.out.println(html);
String encodedFileName = "";
InputStream inputStream = new ByteArrayInputStream(html.getBytes());
FileDownloadUtil.download(inputStream, request, response, encodedFileName);
}
public static String getDomainName(String url) {
String host = "";
try {
URL Url = new URL(url);
host = Url.getHost();
} catch (Exception e) {
e.printStackTrace();
}
return host;
}
public static Map<String, Object> obj2Map(Object obj) {
Map<String, Object> map = new HashMap<String, Object>();
// 获取f对象对应类中的所有属性域
Field[] fields = obj.getClass().getDeclaredFields();
for (int i = 0, len = fields.length; i < len; i++) {
String varName = fields[i].getName();
// varName = varName.toLowerCase();//将key置为小写，默认为对象的属性
try {
// 获取原来的访问控制权限
boolean accessFlag = fields[i].isAccessible();
// 修改访问控制权限
fields[i].setAccessible(true);
// 获取在对象f中属性fields[i]对应的对象中的变量
Object o = fields[i].get(obj);
// if (o != null)
map.put(varName, o);
// 恢复访问控制权限
fields[i].setAccessible(accessFlag);
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
} catch (IllegalAccessException ex) {
ex.printStackTrace();
}
}
return map;
}
/**
* 生成html文件
*
* @param htmlFile html文件
* @param templateName 模板名
*/
public File convertHtml(File htmlFile, String templateName) {
FileOutputStream fos = null;
OutputStreamWriter osw = null;
BufferedWriter bw = null;
try {
Template template = freeMarkerConfigurer.getConfiguration().getTemplate(templateName);
BeansWrapper myWrapper = new BeansWrapperBuilder(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS).build();
template.setObjectWrapper(myWrapper);
fos = new FileOutputStream(htmlFile);
osw = new OutputStreamWriter(new FileOutputStream(htmlFile), "UTF-8");
bw = new BufferedWriter(osw);
// template.process(getRootMap(), bw);
// getRootMap().clear();
} catch (Exception e) {
LOGGER.error("FREEMARKER - create html by template error with templateName : " + templateName, e);
} finally {
IOUtils.closeQuietly(fos);
IOUtils.closeQuietly(osw);
IOUtils.closeQuietly(bw);
}
return htmlFile;
}
/**
* 生成html模板字符串
*
* @return 模板字符串
*/
public String getHtmlText(String templateName,Map<String, Object> map) {
String htmlText = "";
try {
// 通过指定模板名获取FreeMarker模板实例
Configuration configuration = freeMarkerConfigurer.getConfiguration();
configuration.setDefaultEncoding("utf-8");
configuration.setClassForTemplateLoading(this.getClass(), "/template");
configuration.setTemplateLoader(new ClassTemplateLoader(this.getClass(), "/template"));
Template tpl = configuration.getTemplate(templateName, "utf-8");
htmlText = FreeMarkerTemplateUtils.processTemplateIntoString(tpl, map);
map.clear();
} catch (Exception e) {
LOGGER.error("FREEMARKER - create html by template error with templateName : " + templateName, e);
}
return htmlText;
}
public FreeMarkerConfigurer getFreeMarkerConfigurer() {
return freeMarkerConfigurer;
}
public void setFreeMarkerConfigurer(FreeMarkerConfigurer freeMarkerConfigurer) {
this.freeMarkerConfigurer = freeMarkerConfigurer;
}
}