httpclient 认证方式访问http api/resutful api并获取json结果

最近，因公司线上环境rabbitmq经常发生堆积严重的现象，于是跟运维组讨论，帮助开发个集中监控所有rabbitmq服务器运行情况的应用，需要通过java访问rabbitmq暴露的http api并接收json结果，并将下划线转换为驼峰式，其中包括认证。

httpclient 认证方式访问http api/resutful api并获取json结果的相关代码如下：

package com.medsoft.client.test.action;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;

@JsonIgnoreProperties(ignoreUnknown = true)  //在jackson 2.x中，设置忽略无法映射的属性通过设置在bean上的注解来实现，在jackson 1.x中，则是通过DeserializationConfig.Feature来设置，2.x已经没有这个接口了
public class Queue {
    private String name;
    private String node;
    
    private long messages;
    @JsonProperty("messages_ready")
    private long messagesReady;
    @JsonProperty("messages_unacknowledged")
    private long messagesUnacknowledged;
    @JsonProperty("message_bytes_ram")
    private long messageBytesRam;
    @JsonProperty("message_bytes")
    private long messageBytes;
    private long memory;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getNode() {
        return node;
    }
    public void setNode(String node) {
        this.node = node;
    }
    
    public long getMessageBytesRam() {
        return messageBytesRam;
    }
    
    public void setMessageBytesRam(long messageBytesRam) {
        this.messageBytesRam = messageBytesRam;
    }
    
    public long getMemory() {
        return memory;
    }
    public void setMemory(long memory) {
        this.memory = memory;
    }
    public long getMessages() {
        return messages;
    }
    public void setMessages(long messages) {
        this.messages = messages;
    }
}

 

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public static void main(String[] args) {     httpGet("http://localhost:15672/api/queues/%2f/" + "test-api"); }   public static void httpGet(String url){     //设置认证信息     HttpHost targetHost = new HttpHost("localhost", 15672, "http");     CredentialsProvider credsProvider = new BasicCredentialsProvider();     credsProvider.setCredentials(AuthScope.ANY,       new UsernamePasswordCredentials("guest", "guest"));       AuthCache authCache = new BasicAuthCache();     authCache.put(targetHost, new BasicScheme());       // Add AuthCache to the execution context     final HttpClientContext context = HttpClientContext.create();     context.setCredentialsProvider(credsProvider);     context.setAuthCache(authCache);           try      {          HttpClient client = HttpClientBuilder.create().build();         HttpResponse response = client.execute(new HttpGet(url), context);           //请求成功          if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK)          {              //取得返回的字符串              String strResult = EntityUtils.toString(response.getEntity());              System.out.println(strResult);             //Queue queue = JsonUtils.json2Object(strResult, Queue.class);             ObjectMapper objectMapper = new ObjectMapper();             objectMapper.configure(MapperFeature.USE_ANNOTATIONS, true);  --默认情况下，注解不会启用，需要显示启用             objectMapper.setAnnotationIntrospector(new JacksonAnnotationIntrospector());  --默认情况下没有注解解析器，需要设置             Queue queue = objectMapper.readValue(strResult, Queue.class);             System.out.println(JsonUtils.toJson(queue));         }          else          {             System.out.print(response.toString());         }      }      catch (ParseException | IOException e1)      {          e1.printStackTrace();     } }