taotao服务测试http请求需要返回json时出现406错误处理

    @Test
    public void doPost() throws Exception {
        
        CloseableHttpClient httpClient = HttpClients.createDefault();
//        HttpPost post = new HttpPost("http://localhost:8082/httpclient/post.html");
// 注意：如果请求的url后缀是 .html则浏览器不能返回正确的json数据，会返回406错误，所以需要修改请求url的后缀为其他    
        HttpPost post = new HttpPost("http://localhost:8082/httpclient/post.action");
        CloseableHttpResponse response = httpClient.execute(post);
        HttpEntity entity = response.getEntity();
        String string = EntityUtils.toString(entity, "utf-8");
        System.out.println(string);
        response.close();
        httpClient.close();
    }

项目的web.xml中最后加入

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>taotao-portal</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- 加载spring容器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext-*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 解决post乱码 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- springmvc的前端控制器 -->
    <servlet>
        <servlet-name>taotao-portal</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation， springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- 伪静态化 -->
    <servlet-mapping>
        <servlet-name>taotao-portal</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>
    
    <!-- 配置需要返回json类型请求的拦截 -->
    <servlet-mapping>
        <servlet-name>taotao-portal</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
</web-app>