1，根据模板生成静态页面
导入依赖：
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
package com.wjb.util;
import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.log4j.Logger;
import java.io.*;
/**
* Created by wjb on 2017/5/9.
*/
public class HtmlGenerator {
private final static Logger logger = Logger.getLogger(HtmlGenerator.class);
HttpClient httpClient = null; //HttpClient实例
GetMethod getMethod = null; //GetMethod实例
BufferedWriter fw = null;
String page = null;
String webappname = null;
BufferedReader br = null;
InputStream in = null;
StringBuffer sb = null;
String line = null;
//构造方法
public HtmlGenerator(String webappname) {
this.webappname = webappname;
}
/**
* 根据模版及参数产生静态页面
*/
public boolean createHtmlPage(String url, String htmlFileName) {
boolean status = false;
int statusCode = 0;
try {
//创建一个HttpClient实例充当模拟浏览器
httpClient = new HttpClient();
//设置httpclient读取内容时使用的字符集
httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
//创建GET方法的实例
getMethod = new GetMethod(url);
//使用系统提供的默认的恢复策略，在发生异常时候将自动重试3次
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
//设置Get方法提交参数时使用的字符集,以支持中文参数的正常传递
getMethod.addRequestHeader("Content-Type", "text/html;charset=UTF-8");
//执行Get方法并取得返回状态码，200表示正常，其它代码为异常
statusCode = httpClient.executeMethod(getMethod);
if (statusCode != 200) {
logger.fatal("静态页面引擎在解析" + url + "产生静态页面" + htmlFileName + "时出错!");
} else {
//读取解析结果
sb = new StringBuffer();
in = getMethod.getResponseBodyAsStream();
//br = new BufferedReader(new InputStreamReader(in));//此方法默认会乱码，经过长时期的摸索，下面的方法才可以
br = new BufferedReader(new InputStreamReader(in, "UTF-8"));
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
if (br != null) br.close();
page = sb.toString();
//将页面中的相对路径替换成绝对路径，以确保页面资源正常访问
page = formatPage(page);
//将解析结果写入指定的静态HTML文件中，实现静态HTML生成
writeHtml(htmlFileName, page);
status = true;
}
} catch (Exception ex) {
logger.fatal("静态页面引擎在解析" + url + "产生静态页面" + htmlFileName + "时出错:" + ex.getMessage());
} finally {
//释放http连接
getMethod.releaseConnection();
}
return status;
}
//将解析结果写入指定的静态HTML文件中
private synchronized void writeHtml(String htmlFileName, String content) throws Exception {
fw = new BufferedWriter(new FileWriter(htmlFileName));
OutputStreamWriter fw = new OutputStreamWriter(new FileOutputStream(htmlFileName), "UTF-8");
fw.write(page);
if (fw != null) fw.close();
}
//将页面中的相对路径替换成绝对路径，以确保页面资源正常访问
private String formatPage(String page) {
page = page.replaceAll("\\.\\./\\.\\./\\.\\./", webappname + "/");
page = page.replaceAll("\\.\\./\\.\\./", webappname + "/");
page = page.replaceAll("\\.\\./", webappname + "/");
return page;
}
//测试方法
public static void main(String[] args) {
HtmlGenerator h = new HtmlGenerator("wjbHtml");
h.createHtmlPage("http://www.jianshu.com/u/1b21f2e84e3e", "src/main/resources/templates/a.html");
h.createHtmlPage("http://localhost:8080/wjb", "src/main/resources/templates/c.html");
System.out.println("静态页面已经生成");
}
}
2,拼接标签生成页面
package com.wjb.util;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
/**
* Created by wjb on 2017/5/9.
*/
public class DynamicHtml {
public static void main(String[] args) {
StringBuilder stringHtml = new StringBuilder();
PrintStream ps = null;
try {
ps = new PrintStream(new FileOutputStream("src/main/resources/templates/b.html"));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
stringHtml.append("<html><head>");
stringHtml.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=GBK\">");
stringHtml.append("<title>测试页面</title>");
stringHtml.append("</head>");
stringHtml.append("<body>");
stringHtml.append("<div>hello</div>");
stringHtml.append("</body></html>");
ps.println(stringHtml.toString());
}
}
