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<>1、利用注解
第一种方式比较简单，直接使用springboot获取请求头的方式，从controller方法入口处使用： @RequestHeader(value =
“xxxx”,required = false) String user 的方式获取请求头
@ApiOperation(value = "特定用户的租户分页", notes = "特定用户的租户分页") @GetMapping(value =
"/queryByUserName") public Response queryByUserName(/*@RequestHeader
Map<String, String> headers*/ @RequestHeader(value = "user",required = false)
String user, @RequestParam("pageNum") Integer pageNum, @RequestParam("pageSize")
Integer pageSize ) { log.info("------>拿到的请求头是："+user); JSONObject jsonObject =
JSONObject.parseObject(user); String userName= (String)jsonObject.get(
"user_name"); // sun_13989882379 log.debug(userName+ ""); Page<TenantPO>
pageInfo= tenantServiceFeign.selectByUserName(pageNum,pageSize,userName); return
Response.ok(PageOut.build(pageInfo, TenantDto.class)); }
可以利用下面的方式获取所有的请求头：
@ApiOperation(value = "特定用户的租户分页", notes = "特定用户的租户分页") @GetMapping(value =
"/queryByUserName") public Response queryByUserName(@RequestHeader Map<String,
String> headers, @RequestParam("pageNum") Integer pageNum, @RequestParam(
"pageSize") Integer pageSize ) { headers.forEach((key, value) -> { // 日志中输出所有请求头
// Header 'user' =
{"JWT_USER_ID_":1,"user_name":"sunj_13989882379","scope":["all"],"exp":1634643867,"JWT_USER_NAME_":"sunj_13989882379",
// "jti":"e24ef65b-8302-41d3-91f3-2f92366d51fe","client_id":"clientapp"} log.
debug(String.format("Header '%s' = %s", key, value)); }); Page<TenantPO>
pageInfo= tenantServiceFeign.selectByUserName(pageNum,pageSize,userName); return
Response.ok(PageOut.build(pageInfo, TenantDto.class)); }
<>2、使用拦截器
如果有几十个接口那么都要使用注解写，过于累赘，可以使用拦截器进行开发，代码如下。
<>（1）声明 上下文
/** * 规定所有的Http头中必须携带Token 来验证用户身份，采用在拦截器用户名信息绑定到ThreadLocal，以供后续方法使用 * 声明 上下文
*/ public class RequestHeaderContext { private static final ThreadLocal<
RequestHeaderContext> REQUEST_HEADER_CONTEXT_THREAD_LOCAL=new ThreadLocal<>();
private String userName; // private String token; public String getUserName() {
return userName; } /*public String getToken() { return token; }*/ public static
RequestHeaderContext getInstance(){ return REQUEST_HEADER_CONTEXT_THREAD_LOCAL.
get(); } public void setContext(RequestHeaderContext context){
REQUEST_HEADER_CONTEXT_THREAD_LOCAL.set(context); } public static void clean(){
REQUEST_HEADER_CONTEXT_THREAD_LOCAL.remove(); } private RequestHeaderContext(
RequestHeaderContextBuild requestHeaderContextBuild){ this.userName=
requestHeaderContextBuild.userName; //
this.token=requestHeaderContextBuild.token; setContext(this); } public static
class RequestHeaderContextBuild{ private String userName; // private String
token; public RequestHeaderContextBuild userName(String userName){ this.userName
=userName; return this; } /*public RequestHeaderContextBuild token(String
token){ this.token=token; return this; }*/ public RequestHeaderContext bulid(){
return new RequestHeaderContext(this); } } }
<>（2）声明拦截器
/** * 声明拦截器 */ @Slf4j public class RequestHeaderContextInterceptor extends
HandlerInterceptorAdapter { // private static final String HEAD_USER_NAME =
"user_name"; private static final String HEAD_TOKEN = "token"; @Override public
boolean preHandle(HttpServletRequest request, HttpServletResponse response,
Object handler) throws Exception { initHeaderContext(request); return super.
preHandle(request, response, handler); } private void initHeaderContext(
HttpServletRequest request){ String userInfo = request.getHeader("user"); log.
info(">>>>>>>拦截到api相关请求头<<<<<<<<"+userInfo); JSONObject jsonObject = JSONObject.
parseObject(userInfo); String user_name = (String) jsonObject.get("user_name");
new RequestHeaderContext.RequestHeaderContextBuild()
//.token(request.getHeader(HEAD_TOKEN)) .userName(user_name) .bulid(); }
@Override public void postHandle(HttpServletRequest request, HttpServletResponse
response, Object handler, ModelAndView modelAndView) throws Exception {
RequestHeaderContext.clean(); super.postHandle(request, response, handler,
modelAndView); } }
<>（3）绑定拦截器
/** * 绑定拦截器 */ @Configuration public class WebMvcConfig implements
WebMvcConfigurer { @Bean public HandlerInterceptor
requestHeaderContextInterceptor() { return new RequestHeaderContextInterceptor()
; } @Override public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(requestHeaderContextInterceptor()).addPathPatterns("/**"
); WebMvcConfigurer.super.addInterceptors(registry); } }
<>（4）使用
@ApiOperation(value = "特定用户的租户分页", notes = "特定用户的租户分页") @GetMapping(value =
"/queryByUserName") public Response queryByUserName( @RequestParam("pageNum")
Integer pageNum, @RequestParam("pageSize") Integer pageSize ) { String userName
= RequestHeaderContext.getInstance().getUserName(); log.debug( "user_name ---> "
+ RequestHeaderContext.getInstance().getUserName()); //
此租户的分页查询是查询所有的租户，而不是查询一个用户下关联的租户 // 需要先根据用户名，筛选出相关的租户id，然后根据租户id得到租户的信息 Page<
TenantPO> pageInfo = tenantServiceFeign.selectByUserName(pageNum,pageSize,
userName); return Response.ok(PageOut.build(pageInfo, TenantDto.class)); }