SpringMVC请求/响应乱码问题解决方案解析

<Connector URIEncoding="utf-8" connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

String username = new String(request.getParamter("userName").getBytes("ISO8859-1"),"utf-8")

<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>

  @RequestMapping(value = "findItem",produces = "application/json;charset=utf8")
  @ResponseBody
  public String findItem(Integer id) {
    return "接收到的请求参数是:" + id;
  }

//@Controller
//RestController:注解相当于Controller注解和ResponseBody注解的结合体
@RestController
@RequestMapping(value = "item",produces = "application/json;charset=utf8")
public class ItemController {}