HttpServletRequest对象方法的用法
2017-02-15 15:58
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1. 获得客户机信息getRequestURL方法返回客户端发出请求时的完整URL。
getRequestURI方法返回请求行中的资源名部分。
getQueryString 方法返回请求行中的参数部分。
getRemoteAddr方法返回发出请求的客户机的IP地址
getRemoteHost方法返回发出请求的客户机的完整主机名
getRemotePort方法返回客户机所使用的网络端口号
getLocalAddr方法返回WEB服务器的IP地址。
getLocalName方法返回WEB服务器的主机名
getMethod得到客户机请求方式
2.获得客户机请求头
getHeader(string name)方法
getHeaders(String name)方法
getHeaderNames方法
3. 获得客户机请求参数(客户端提交的数据)
getParameter(name)方法
getParameterValues(String name)方法
getParameterNames方法
getParameterMap方法
例子程序:
[java] view plain copy print?public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println(”getRequestURL: ”+request.getRequestURL());
System.out.println(”getRequestURI: ”+request.getRequestURI());
System.out.println(”getQueryString: ”+request.getQueryString());
System.out.println(”getRemoteAddr: ”+request.getRemoteAddr());
System.out.println(”getRemoteHost: ”+request.getRemoteHost());
System.out.println(”getRemotePort: ”+request.getRemotePort());
System.out.println(”getRemoteUser: ”+request.getRemoteUser());
System.out.println(”getLocalAddr: ”+request.getLocalAddr());
System.out.println(”getLocalName: ”+request.getLocalName());
System.out.println(”getLocalPort: ”+request.getLocalPort());
System.out.println(”getMethod: ”+request.getMethod());
System.out.println(”——-request.getParamterMap()——-“);
//得到请求的参数Map,注意map的value是String数组类型
Map map = request.getParameterMap();
Set<String> keySet = map.keySet();
for (String key : keySet) {
String[] values = (String[]) map.get(key);
for (String value : values) {
System.out.println(key+”=”+value);
}
}
System.out.println(”——–request.getHeader()——–”);
//得到请求头的name集合
Enumeration<String> em = request.getHeaderNames();
while (em.hasMoreElements()) {
String name = (String) em.nextElement();
String value = request.getHeader(name);
System.out.println(name+”=”+value);
}
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("getRequestURL: "+request.getRequestURL()); System.out.println("getRequestURI: "+request.getRequestURI()); System.out.println("getQueryString: "+request.getQueryString()); System.out.println("getRemoteAddr: "+request.getRemoteAddr()); System.out.println("getRemoteHost: "+request.getRemoteHost()); System.out.println("getRemotePort: "+request.getRemotePort()); System.out.println("getRemoteUser: "+request.getRemoteUser()); System.out.prin 4000 tln("getLocalAddr: "+request.getLocalAddr()); System.out.println("getLocalName: "+request.getLocalName()); System.out.println("getLocalPort: "+request.getLocalPort()); System.out.println("getMethod: "+request.getMethod()); System.out.println("-------request.getParamterMap()-------"); //得到请求的参数Map,注意map的value是String数组类型 Map map = request.getParameterMap(); Set<String> keySet = map.keySet(); for (String key : keySet) { String[] values = (String[]) map.get(key); for (String value : values) { System.out.println(key+"="+value); } } System.out.println("--------request.getHeader()--------"); //得到请求头的name集合 Enumeration<String> em = request.getHeaderNames(); while (em.hasMoreElements()) { String name = (String) em.nextElement(); String value = request.getHeader(name); System.out.println(name+"="+value); } }浏览器上地址栏:http://localhost:8080/RequestAndResponse/requestmethod?name=sunjob&password=123456&password=haha
控制台输出:
[plain] view plain copy print?getRequestURL: http://localhost:8080/RequestAndResponse/requestmethod getRequestURI: /RequestAndResponse/requestmethod
getQueryString: name=sunjob&password=123456&password=haha
getRemoteAddr: 127.0.0.1
getRemoteHost: 127.0.0.1
getRemotePort: 2374
getRemoteUser: null
getLocalAddr: 127.0.0.1
getLocalName: localhost
getLocalPort: 8080
getMethod: GET
——-request.getParamterMap()——-
name=sunjob
password=123456
password=haha
——–request.getHeader()——–
host=localhost:8080
user-agent=Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0
accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
accept-language=zh-cn,en-us;q=0.8,zh;q=0.5,en;q=0.3
accept-encoding=gzip, deflate
connection=keep-alive
cache-control=max-age=0
getRequestURL: http://localhost:8080/RequestAndResponse/requestmethod getRequestURI: /RequestAndResponse/requestmethod getQueryString: name=sunjob&password=123456&password=haha getRemoteAddr: 127.0.0.1 getRemoteHost: 127.0.0.1 getRemotePort: 2374 getRemoteUser: null getLocalAddr: 127.0.0.1 getLocalName: localhost getLocalPort: 8080 getMethod: GET -------request.getParamterMap()------- name=sunjob password=123456 password=haha --------request.getHeader()-------- host=localhost:8080 user-agent=Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0 accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 accept-language=zh-cn,en-us;q=0.8,zh;q=0.5,en;q=0.3 accept-encoding=gzip, deflate connection=keep-alive cache-control=max-age=0
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