大家好，又见面了，我是你们的朋友全栈君。
这里用httpclient4.3模拟一个表单普通文本提交的方法
建一个servlet接受表单数据，只传递2个参数，name和password
//servlet的访问地址是:http://localhost:80/testjs/servlet/FormServlet
public class FormServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { }
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding(“utf-8”); response.setCharacterEncoding(“utf-8”);
//获取传递来的参数 String name = request.getParameter(“name”); String password = request.getParameter(“password”); System.out.println(“你输入的姓名是:” name); System.out.println(“你输入的密码是:” password); //设置响应内容 response.getWriter().write(name ”, 欢迎访问”); }
}
用到的jar包有:commons-codec-1.6.jar,commons-logging-1.1.3.jar,httpclient-4.3.1.jar,httpcore-4.3.jar,httpmime-4.3.1.jar
package com.test.httpClient.myTest;
import java.io.IOException; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.List;
import org.apache.http.Consts; import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; import org.junit.Test;
public class TestHttpClient4 {
@Test public void test1() throws IOException{ CloseableHttpClient httpClient = HttpClients.createDefault(); try{ //post请求的url地址 HttpPost httpPost = new HttpPost(“http://localhost:80/testjs/servlet/FormServlet”); List <NameValuePair> nvps = new ArrayList <NameValuePair>(); //传递2个参数 name和password nvps.add(new BasicNameValuePair(“name”,”王五”)); nvps.add(new BasicNameValuePair(“password”,”12345″)); //转码 封装成请求实体 HttpEntity reqEntity = new UrlEncodedFormEntity(nvps,Consts.UTF_8); httpPost.setEntity(reqEntity); System.out.println(“请求url地址” httpPost.getURI()); //提交表单请求 response是表单的响应 CloseableHttpResponse response = httpClient.execute(httpPost); try { HttpEntity respEntity = response.getEntity(); //响应状态 System.out.println(“Login form get: ” response.getStatusLine()); //EntityUtils.consume(entity); //获取响应内容 System.out.println(EntityUtils.toString(respEntity,Charset.forName(“utf-8”))); //销毁 EntityUtils.consume(respEntity); } finally { response.close(); } }finally{ httpClient.close(); } }
}
运行结果
test端
请求url地址http://localhost:80/testjs/servlet/FormServlet Login form get: HTTP/1.1 200 OK 王五, 欢迎访问
tomcat服务器端
你输入的姓名是:王五 你输入的密码是:12345
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