JAVA 模拟post 表单提交

一开始模拟http请求用的都是这个工具类

package com.bju.cms.common;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.StringRequestEntity;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

public class HttpUtils {


    /**
     * 最大连接数
     */
    private static final int MAX_CONN_TOTAL = 200;
    /**
     * 单个路由的最大连接数，默认是2
     */
    private static final int MAX_CONN_PERROUTE = 20;

    /**
     * 默认超时时间，毫秒
     */
    private static final int DEFAULT_TIMEOUT = 30000;

    /**
     * 默认编码
     */
    private static final String DEFAULT_CHARSET = "UTF-8";

    /**
     * @param url
     * @param paramters
     * @param values
     * @param timeout
     * @return
     * @throws Exception
     */
    public static String post(String url, String[] paramters, String[] values, int timeout) throws Exception {
        CloseableHttpResponse response = null;
        CloseableHttpClient client = null;
        String result = "";
        try {
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
            cm.setDefaultMaxPerRoute(MAX_CONN_PERROUTE);
            cm.setMaxTotal(MAX_CONN_TOTAL);
            client = HttpClients.custom().setConnectionManager(cm).build();
            List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
            for (int i = 0; i < paramters.length; i++) {
                params.add(new BasicNameValuePair(paramters[i], values[i]));
            }
            HttpPost httppost = new HttpPost(url);
            httppost.setEntity(new UrlEncodedFormEntity(params, Charset.forName(DEFAULT_CHARSET)));

            // 设置请求超时，连接超时和数据传输超时
            RequestConfig requestConfig = RequestConfig.custom()
                    .setConnectionRequestTimeout(timeout)
                    .setConnectTimeout(timeout)
                    .setSocketTimeout(timeout).build();
            httppost.setConfig(requestConfig);

            response = client.execute(httppost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                result = EntityUtils.toString(responseEntity, DEFAULT_CHARSET);
            } else {
                throw new RuntimeException("Response status:" + statusCode);
            }
        } finally {
            if (response != null)
                response.close();
            if (client != null)
                client.close();
        }
        return result;
    }

    /**
     * 参数为json的post请求
     * @param url
     * @param jsonData
     * @return
     * @throws Exception
     */
    public static String post(String url, String jsonData, int timeout) throws Exception {
        CloseableHttpResponse response = null;
        CloseableHttpClient client = null;
        String result = "";
        try {
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
            cm.setDefaultMaxPerRoute(MAX_CONN_PERROUTE);
            cm.setMaxTotal(MAX_CONN_TOTAL);
            client = HttpClients.custom().setConnectionManager(cm).build();

            HttpPost httppost = new HttpPost(url);
            HttpEntity requestEntity = new StringEntity(jsonData, Charset.forName(DEFAULT_CHARSET));
            httppost.setEntity(requestEntity);

            // 设置超时时间
            RequestConfig requestConfig = RequestConfig.custom()
                    .setConnectionRequestTimeout(timeout).setConnectTimeout(timeout)
                    .setSocketTimeout(timeout).build();
            httppost.setConfig(requestConfig);

            response = client.execute(httppost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                result = EntityUtils.toString(responseEntity, DEFAULT_CHARSET);
            } else {
                throw new RuntimeException("Response status:" + statusCode);
            }
        } finally {
            if (response != null)
                response.close();
            if (client != null)
                client.close();
        }
        return result;
    }

    /**
     * 通过header认证授权接口
     * @param url
     * @param authorization
     * @param timeout
     * @return
     * @throws Exception
     */
    public static String postByAuth(String url, String authorization, int timeout) throws Exception {
        CloseableHttpResponse response = null;
        CloseableHttpClient client = null;
        String result = "";
        try {
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
            cm.setDefaultMaxPerRoute(MAX_CONN_PERROUTE);
            cm.setMaxTotal(MAX_CONN_TOTAL);
            client = HttpClients.custom().setConnectionManager(cm).build();

            HttpPost httppost = new HttpPost(url);
            httppost.setHeader("Authorization", authorization);

            // 设置超时时间
            RequestConfig requestConfig = RequestConfig.custom()
                    .setConnectionRequestTimeout(timeout)
                    .setConnectTimeout(timeout)
                    .setSocketTimeout(timeout).build();
            httppost.setConfig(requestConfig);

            response = client.execute(httppost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                result = EntityUtils.toString(responseEntity, DEFAULT_CHARSET);
            } else {
                throw new RuntimeException("Response status:" + statusCode);
            }
        } finally {
            if (response != null)
                response.close();
            if (client != null)
                client.close();
        }
        return result;
    }

    /**
     * 支持contentType的请求
     * @param url
     * @param data
     * @return
     * @throws Exception
     */
    public static String post(String url, String data, String contentType) throws Exception {
        CloseableHttpResponse response = null;
        CloseableHttpClient httpclient = null;
        String result = "";
        try {
            PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
            cm.setDefaultMaxPerRoute(MAX_CONN_PERROUTE);
            cm.setMaxTotal(MAX_CONN_TOTAL);
            httpclient = HttpClients.custom().setConnectionManager(cm).build();
            HttpPost httppost = new HttpPost(url);
            // 设置参数
            StringEntity reqEntity = new StringEntity(data);
            reqEntity.setContentType(contentType);

            // 设置超时时间
            RequestConfig requestConfig = RequestConfig.custom()
                    .setConnectionRequestTimeout(DEFAULT_TIMEOUT)
                    .setConnectTimeout(DEFAULT_TIMEOUT)
                    .setSocketTimeout(DEFAULT_TIMEOUT).build();
            httppost.setConfig(requestConfig);

            httppost.setEntity(reqEntity);
            response = httpclient.execute(httppost);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                result = EntityUtils.toString(responseEntity, DEFAULT_CHARSET);
            } else {
                throw new RuntimeException("Response status:" + statusCode);
            }
        } finally {
            if (response != null)
                response.close();
            if (httpclient != null)
                httpclient.close();
        }
        return result;
    }

    /**
     * 支持https请求
     * @param url
     * @param data
     * @param contentType
     * @return
     * @throws Exception
     */
    @SuppressWarnings("deprecation")
    public static String postByHttps(String url, String data, String contentType) throws Exception {
        HttpClient client = null;
        PostMethod post = null;
        try {
            client = new HttpClient();
            post = new PostMethod(url);
            post.setRequestHeader("Authorizatimon", "no-check-certificate");
            post.setRequestHeader("Content-type", contentType);
            StringRequestEntity requestEntity = new StringRequestEntity(data);
            post.setRequestEntity(requestEntity);
            client.setTimeout(DEFAULT_TIMEOUT);
            client.setConnectionTimeout(DEFAULT_TIMEOUT);
            int status = client.executeMethod(post);
            if (status == HttpStatus.SC_OK) {
                return new String(post.getResponseBody(), DEFAULT_CHARSET);
            } else {
                throw new RuntimeException("Response status:" + status);
            }
        } finally {
            if (post != null)
                post.abort();
        }
    }



}

昨天模拟写一个post的表单提交  请求200 但是参数传不过去  后来在网上搜了很多 发现了另一种办法......

package com.bju.csair.common;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.List;

public class HttpU {
    public static String postWithParamsForString(String url, List<NameValuePair> params){
        HttpClient client = HttpClients.createDefault();
        HttpPost httpPost =   new HttpPost(url);
        String s = "";
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(params,"UTF-8"));
            httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
            HttpResponse response = client.execute(httpPost);
            int statusCode = response.getStatusLine().getStatusCode();
            if(statusCode==200){
                HttpEntity entity = response.getEntity();
                s = EntityUtils.toString(entity);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }
}

看到这个方法的时候突然想到原来好像是真的这么用过  用这个NameValuePair组装参数的  

List<NameValuePair> params = new ArrayList<>();
NameValuePair jobGroup = new BasicNameValuePair("jobGroup", String.valueOf(pageListRequest.getJobGroup()));
NameValuePair start = new BasicNameValuePair("start", pageListRequest.getStart());
NameValuePair length = new BasicNameValuePair("length", pageListRequest.getLength());
NameValuePair jobDesc = new BasicNameValuePair("length", pageListRequest.getJobDesc());
NameValuePair executorHandler = new BasicNameValuePair("length", pageListRequest.getExecutorHandler());
params.add(jobGroup);
params.add(start);
params.add(length);
params.add(jobDesc);
params.add(executorHandler);