一.HttpClient、JsonPath、JsonObject运用

HttpClient详细应用请参考官方api文档：http://hc.apache.org/httpcomponents-client-4.5.x/httpclient/apidocs/index.html

1.使用httpclient进行接口测试,所需jar包如下：httpclient.jar、 httpcore.jar、 commons-logging.jar

 2.使用JSONObject插件处理响应数据
 所需的6个JAR包：json-lib.jar、commons-beanutils.jar、commons-collections.jar、ezmorph.jar、commons-logging.jar、commons-lang.jar

3.使用正则表达式匹配提取响应数据

 

public class UserApiTest {
    private static CloseableHttpClient httpClient = null;
    
    @BeforeClass
    public static void setUp(){
        httpClient = HttpClients.createDefault();    //创建httpClient
    }
    
    @AfterClass
    public static void terDown() throws IOException{
        httpClient.close();    
    }
  　
    /*    
     * 使用httpclient进行接口测试,所需jar包如下：
     *httpclient.jar、 httpcore.jar、 commons-logging.jar
     *get请求
     **/
    @Test
    public void userQueryWithRegTest1() throws ClientProtocolException, IOException{
        HttpGet request = new HttpGet("url地址");    // 创建请求
        //设置请求和连接超时时间,可以不设置
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(20000).build();
        request.setConfig(requestConfig);    //get请求设置请求和传输超时时间
        CloseableHttpResponse response = httpClient.execute(request);    //执行请求
        String body = EntityUtils.toString(response.getEntity());
        response.close();          //释放连接
        System.out.println(body);
        
        //获取响应头信息
        Header headers[] = response.getAllHeaders();
        for(Header header:headers){
            System.out.println(header.getName()+"： "+header.getValue());
        }
        
        // 打印响应信息
        System.out.println(response.getStatusLine().getStatusCode());
    }
    
    /*    
     * 使用httpclient进行接口测试,所需jar包如下：
     *httpclient.jar、 httpcore.jar、 commons-logging.jar
     *get请求
     **/
    @Test
    public void testPost1() throws ClientProtocolException, IOException{
        HttpPost request = new HttpPost("http://101.200.167.51:8081/fund-api/expProduct");
        //设置post请求参数
        List<NameValuePair> foramParams = new ArrayList<NameValuePair>();
        foramParams.add(new BasicNameValuePair("name", "新手体验"));
        foramParams.add(new BasicNameValuePair("yieldRate", "7"));
        foramParams.add(new BasicNameValuePair("extraYieldRate", "2"));
        foramParams.add(new BasicNameValuePair("duration", "3"));
        foramParams.add(new BasicNameValuePair("minBidAmount", "0"));
        foramParams.add(new BasicNameValuePair("maxBidAmount", "10000"));
        UrlEncodedFormEntity urlEntity = new UrlEncodedFormEntity(foramParams, "UTF-8");
        request.setEntity(urlEntity);  //设置POST请求参数
        CloseableHttpResponse response = httpClient.execute(request);    //执行post请求
        String body = EntityUtils.toString(response.getEntity());    
        response.close();    //释放连接
        System.out.println(body);
        JSONObject jsonObj = JSONObject.fromObject(body);
        System.out.println("是否成功："+jsonObj.getString("msg").equals("成功"));
    }

    /*
     * 用正则表达式提取响应数据
     * */
    @Test
    public void userQueryWithRegTest2() throws ClientProtocolException, IOException{
        HttpGet request = new HttpGet("url地址"); // 创建请求
        CloseableHttpResponse response = httpClient.execute(request);    // 执行某个请求
        String body = EntityUtils.toString(response.getEntity());    // 得到响应内容
        response.close();
        System.out.println(body);

        // "nickname":"([a-zA-Z0-9]*)"
        Pattern pattern = Pattern.compile(""mobile":"(\d+)","nickname":"([a-zA-Z0-9]*)".*"status":(\d)"); // 从正则表达式得到一个模式对象
        Matcher matcher = pattern.matcher(body);// 对响应内容进行匹配
        while (matcher.find()) {
            String group0 = matcher.group(0); // **_g0
            String group1 = matcher.group(1); // **_g1
            String group2 = matcher.group(2); // **_g1
            String group3 = matcher.group(3); // **_g1
            System.out.println(group0 + "	" + group1 + "	" + group2 + "	" + group3);
        }

    }
    
    /*
     * 使用JsonPath提取json响应数据中的数据
     * 需要的jar包：json-path-2.2.0.jar
     */
    @Test
    public void userQueryWithRegTest3() throws ClientProtocolException, IOException{
        HttpGet request = new HttpGet("url地址"); // 创建请求
        CloseableHttpResponse response = httpClient.execute(request);    // 执行某个请求
        String body = EntityUtils.toString(response.getEntity());    // 得到响应内容
        response.close();
        System.out.println(body);

        ReadContext ctx = JsonPath.parse(body);
        String  mobile = ctx.read("$.data.mobile");
        String  nickname = ctx.read("$.data.nickname");
        int status = ctx.read("$.data.status");
        String avatar = ctx.read("$.data.avatar");
        System.out.println(mobile + "	" + nickname + "	" + status + "	" + avatar);
    }
    
        
    
        /*
         * 使用JSONObject插件处理响应数据
         * 所需的6个JAR包：json-lib.jar、commons-beanutils.jar、commons-collections.jar、ezmorph.jar、commons-logging.jar、commons-lang.jar
         */
    @Test
    public void userQueryWithRegTest5() throws ClientProtocolException, IOException{
        HttpGet request = new HttpGet("url地址"); // 创建请求
        CloseableHttpResponse response = httpClient.execute(request);    // 执行某个请求
        String body = EntityUtils.toString(response.getEntity());    // 得到响应内容
        response.close();
        
        //将响应的字符串转换为JSONObject对象
        JSONObject jsonObj = JSONObject.fromObject(body);
        System.out.println(jsonObj.getString("code").equals("200"));
        //data是对象中的一个对象，使用getJSONObject()获取
        JSONObject jsonObj1 = jsonObj.getJSONObject("data");
        System.out.println("status:"+jsonObj1.getInt("status")+"
"+"nickname:"+jsonObj1.getString("nickname"));
    }
    
    
    
    /*
     * java代码转换json
     * 需要的jar包：json-lib
     * */
    @Test
    public void testJavaToJson(){
        System.out.println("--------------------------------------------------------------");
        System.out.println("java代码封装为json字符串:");
        JSONObject jsonObj = new JSONObject();
        jsonObj.put("username", "张三");
        jsonObj.put("password", "123456");
        System.out.println("java--->json: "+jsonObj.toString());
        System.out.println("--------------------------------------------------------------");
    }
    
    /*
     * json字符串转xml字符串
     * 需要的jar包：json-lib;xom
     * */
    @Test
    public void testJsonToXml(){
        System.out.println("--------------------------------------------------------------");
        System.out.println("json转xml字符串");
        String jsonStr = "{"username":"张三","password":"123456"}";
        JSONObject jsonObj = JSONObject.fromObject(jsonStr);
        XMLSerializer xmlSerializer = new XMLSerializer();
        // 设置根元素名称
        xmlSerializer.setRootName("user_info");
        // 设置类型提示，即是否为元素添加类型 type = "string"
        xmlSerializer.setTypeHintsEnabled(false);
        String xml = xmlSerializer.write(jsonObj);
        System.out.println("json--->xml: "+xml);
        System.out.println("--------------------------------------------------------------");
    }
    
    /*
     * xml字符串转json字符串
     * 需要的jar包：json-lib;xom
     * */
    @Test
    public void testXmlToJson(){
        System.out.println("--------------------------------------------------------------");
        System.out.println("xml字符串转json字符串");
        String xml = "<?xml version="1.0" encoding="UTF-8"?><user_info><password>123456</password><username>张三</username></user_info>";
        XMLSerializer xmlSerializer = new XMLSerializer();
        JSON json= xmlSerializer.read(xml);    //JSON是JSONObject的String形式
        System.out.println("xml---->json:"+json);
        System.out.println("--------------------------------------------------------------");
    }
    
    /*
     * javaBean转json
     * 需要的jar包：json-lib
     * */
    @Test
    public void testJavaBeanToJson(){
        System.out.println("--------------------------------------------------------------");
        System.out.println("javaBean转json");
        UserInfo userInfo = new UserInfo();
        userInfo.setUsername("张三");
        userInfo.setPassword("123456");
        JSONObject JsonObj = JSONObject.fromObject(userInfo);
        System.out.println("javaBean--->json:"+JsonObj.toString());
        System.out.println("--------------------------------------------------------------");
    }
    
    /*
     * javaBean转xml
     * 需要的jar包：json-lib;xom
     * */
    @Test
    public void testJavaBeanToXml(){
        System.out.println("--------------------------------------------------------------");
        System.out.println("javaBean转xml");
        UserInfo userInfo = new UserInfo();
        userInfo.setUsername("张三");
        userInfo.setPassword("123456");
        JSONObject JsonObj = JSONObject.fromObject(userInfo);
        XMLSerializer xmlSerializer = new XMLSerializer();
        xmlSerializer.setRootName("user_info");
        String xml = xmlSerializer.write(JsonObj, "UTF-8");
        System.out.println("javaBeanToXml--->xml:"+xml);
        System.out.println("--------------------------------------------------------------");
    }
}

补充：

　　 /*    
     *使用 java.net.URL.URL请求
     * */
    @Test
    public void useJavaUrl(){
        String httpUrl = "http://apis.baidu.com/showapi_open_bus/mobile/find";
        String httpArg = "num=13901452908";
        BufferedReader reader = null;
        String result = null;
        StringBuffer sbf = new StringBuffer();
        httpUrl = httpUrl + "?" + httpArg;

        try {
            URL url = new URL(httpUrl);
            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setRequestMethod("GET");
            // 填入apikey到HTTP header
            connection.setRequestProperty("apikey",  "f584d68b4aebca91c154bffd397e05cd");
            connection.connect();
            InputStream is = connection.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sbf.append(strRead);
                sbf.append("
");
            }
            reader.close();
            result = sbf.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println(result);
    }

UserInfo:

public class UserInfo {
    public String username;
    public String password;
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
}