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JAVA的各种HTTP/HTTPS模拟请求使用经验汇总

https:

try{
			

			
		StringBuffer reultBuffer = new StringBuffer();
			
		KeyStore keyStore  = KeyStore.getInstance("PKCS12");
		FileInputStream instream = new FileInputStream(new File("/home/certificate/apiclient_cert.p12"));
	        String passwordssss=mch_id;
	        keyStore.load(instream, passwordssss.toCharArray());	//证书密码
	        instream.close();
	        SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, passwordssss.toCharArray()).build();	//证书密码（初始是商户ID）
	        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,new String[] { "TLSv1" },null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
	        
		HttpPost httpPost = new HttpPost("https://fraud.mch.weixin.qq.com/risk/getpublickey");
	        CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
	        httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");
	        httpPost.setEntity(new StringEntity(str_lingqian.toString(),"UTF-8"));
	        
	        CloseableHttpResponse response      = null;
	        InputStream inputStream		        = null;
	        InputStreamReader inputStreamReader = null;
	        BufferedReader bufferedReader       = null;
	        try {
	        	response = httpclient.execute(httpPost);
	        	HttpEntity entity = response.getEntity();
				if (entity!=null){
					inputStream = entity.getContent();
					inputStreamReader = new InputStreamReader(inputStream,"UTF-8");
					bufferedReader = new BufferedReader(inputStreamReader);
					String str = null;
					while ((str = bufferedReader.readLine()) != null) {
						reultBuffer.append(str);
						System.out.println(str);
					}
				}
			} catch (ClientProtocolException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}finally{

				httpclient.close();
				response.close();
				bufferedReader.close();
				inputStreamReader.close();
				inputStream.close();
				inputStream = null;
			}
	     
	        Document document = DocumentHelper.parseText(reultBuffer.toString());
	        Element rootElm = document.getRootElement();
	        if(rootElm.elementText("return_code").toString().equals("SUCCESS") && rootElm.elementText("result_code").toString().equals("SUCCESS") ){
	        	pub_key = rootElm.elementText("pub_key").toString();
	        	System.out.println("pub_key = "+pub_key);
	        }else{	        	
	        	return status;
	        }
			
}catch(Exception e){
	e.printStackTrace();
}

try{

StringBuffer reultBuffer = new StringBuffer();

KeyStore keyStore = KeyStore.getInstance("PKCS12");

FileInputStream instream = new FileInputStream(new File("/home/certificate/apiclient_cert.p12"));

String passwordssss=mch_id;

keyStore.load(instream, passwordssss.toCharArray()); //证书密码

instream.close();

SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, passwordssss.toCharArray()).build(); //证书密码（初始是商户ID）

SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext,new String[] { "TLSv1" },null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);

HttpPost httpPost = new HttpPost("https://fraud.mch.weixin.qq.com/risk/getpublickey");

CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");

httpPost.setEntity(new StringEntity(str_lingqian.toString(),"UTF-8"));

CloseableHttpResponse response = null;

InputStream inputStream = null;

InputStreamReader inputStreamReader = null;

BufferedReader bufferedReader = null;

try {

response = httpclient.execute(httpPost);

HttpEntity entity = response.getEntity();

if (entity!=null){

inputStream = entity.getContent();

inputStreamReader = new InputStreamReader(inputStream,"UTF-8");

bufferedReader = new BufferedReader(inputStreamReader);

String str = null;

while ((str = bufferedReader.readLine()) != null) {

reultBuffer.append(str);

System.out.println(str);

}

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}finally{

httpclient.close();

response.close();

bufferedReader.close();

inputStreamReader.close();

inputStream.close();

inputStream = null;

}

Document document = DocumentHelper.parseText(reultBuffer.toString());

Element rootElm = document.getRootElement();

if(rootElm.elementText("return_code").toString().equals("SUCCESS") && rootElm.elementText("result_code").toString().equals("SUCCESS") ){

pub_key = rootElm.elementText("pub_key").toString();

System.out.println("pub_key = "+pub_key);

}else{

return status;

}

}catch(Exception e){

e.printStackTrace();

}

java中实现HashMap中的按照key的字典顺序排序输出

 HashMap<String, String> maptest =new  HashMap<String, String>();
		 maptest.put("1天","day1");
		 maptest.put("5天","day5");
		 maptest.put("4天","day4");
		 maptest.put("2天","day2");
		 maptest.put("3天","day3");
		 
		 Collection<String> keyset= maptest.keySet();
		 List<String> list = new ArrayList<String>(keyset);
		 
		 //对key键值按字典升序排序
		 Collections.sort(list);
		 
		 
		 for (int i = 0; i < list.size(); i++) {
			 System.out.println("key键---值: "+list.get(i)+","+maptest.get(list.get(i)));
		 }

HashMap<String, String> maptest =new HashMap<String, String>();

maptest.put("1天","day1");

maptest.put("5天","day5");

maptest.put("4天","day4");

maptest.put("2天","day2");

maptest.put("3天","day3");

Collection<String> keyset= maptest.keySet();

List<String> list = new ArrayList<String>(keyset);

//对key键值按字典升序排序

Collections.sort(list);

for (int i = 0; i < list.size(); i++) {

System.out.println("key键---值: "+list.get(i)+","+maptest.get(list.get(i)));

}

在struts2上获取包含参数的完整的url

Map map = request.getParameterMap();
Iterator it = map.keySet().iterator();
String paramStr = "";
while(it.hasNext()){
	String key = it.next().toString();
	String value = request.getParameter(key);
	paramStr += key + "=" + value + "&";
}
//完整的请求
System.out.println(request.getRequestURL()+"?"+paramStr);

Map map = request.getParameterMap();

Iterator it = map.keySet().iterator();

String paramStr = "";

while(it.hasNext()){

String key = it.next().toString();

String value = request.getParameter(key);

paramStr += key + "=" + value + "&";

}

//完整的请求

System.out.println(request.getRequestURL()+"?"+paramStr);

用java清除字符串里的样式标签

java 清除 HTML标签格式、CSS 样式

JAVA代码可以这样写:

[java] view plain copy print ?

public static String delTagsFContent(String content){
String strHtml="";//HTML文本代码
String strClear=strHtml.replaceAll( ".*?(.*?)<\\/body>", "$1"); //读出body内里所有内容
strClear=strClear.replaceAll("</?[^/?(br)|(p)][^><]*>","");//保留br标签和p标签
system.out.println(strClear);//输出结果
}

public static String delTagsFContent(String content){

String strHtml="";//HTML文本代码

String strClear=strHtml.replaceAll( ".*?(.*?)<\\/body>", "$1"); //读出body内里所有内容

strClear=strClear.replaceAll("</?[^/?(br)|(p)][^><]*>","");//保留br标签和p标签

system.out.println(strClear);//输出结果

}

如果要保留IMG标签的话，正则表达式就是：</?[^/?(img)][^><]*>

如果想保留更多的标签，只在正则表达式改一下就可以了， </?[^/?(img)|(p)][^><]*> 这个保留(这里写的保留了img,p这两个标签)你指定的标签,其他的(包括font)全去掉, 如果你还有其他的标签想保留,直接在里面加一个 |(xxx)就行了

想去掉所有的标签的话正则表达式为：</?[a-zA-Z]+[^><]*>

JDK安装与环境变量配置

安装JDK 选择安装目录安装过程中会出现两次安装提示。第一次是安装 jdk ，第二次是安装 jre 。建议两个都安装在同一个java文件夹中的不同文件夹中。（不能都安装在java文件夹的根目录下，jdk和jre安装在同一文件夹会出错）

1：安装jdk 随意选择目录只需把默认安装目录 \java 之前的目录修改即可
2：安装jre→更改→ \java 之前目录和安装 jdk 目录相同即可
注：若无安装目录要求，可全默认设置。无需做任何修改，两次均直接点下一步。

安装完JDK后配置环境变量计算机→属性→高级系统设置→高级→环境变量

系统变量→新建 JAVA_HOME 变量。
变量值填写jdk的安装目录（本人是 E:\Java\jdk1.7.0)

系统变量→寻找 Path 变量→编辑
在变量值最后输入 %JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;
（注意原来Path的变量值末尾有没有;号，如果没有，先输入；号再输入上面的代码）

系统变量→新建 CLASSPATH 变量
变量值填写 .%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar（注意最前面有一点）
系统变量配置完毕

检验是否配置成功运行cmd 输入 java -version （java 和 -version 之间有空格）

【转】JPEGImageEncoder编译有关问题

解决：Access restriction: The type JPEGImageEncoder is not accessible due to restriction

在Eclipse中处理图片，需要引入两个包：
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
报错:
Access restriction: The type JPEGImageEncoder is not accessible due to restriction on required library C:\Java\jre1.6.0_07\lib\rt.jar

此时解决办法：
Eclipse 默认把这些受访问限制的API设成了ERROR。

只要把Windows-Preferences-Java-Complicer- Errors/Warnings里面的Deprecated and restricted API中的Forbidden references(access rules)选为Warning就可以编译通过

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