Spring Boot 简单的请求示例（包括请求体验证）

1.先做个最简单的Get请求

新建一个Controller , 并给他添加注解@RestController 它是@Controller和@ResponseBody的组合注解，告诉Spring我是一个Controller，请求过来的时候，记得扫描我

ok，在给他添加@RequestMapping注解，为这个Controler指明路径

@RestController
@RequestMapping("/Demo")
public class DemoController {

    
    @ResponseBody
    @RequestMapping(value = "/sayHello",method = RequestMethod.GET)
    public Map<String,Object> sayHello(){
        Map<String,Object> res = new HashMap<String,Object>();
        res.put("message", "hello world");
        return res;
    }
}

写个Get方法，返回一个Map

右击启动类 run...

2.POST请求的方法

正常在接口请求过程中，中间会有个过滤器，过滤所有请求的内容，同时做一些安全方面的校验

过滤器注册类

@Configuration
public class WebConfig {
    
    @Bean
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public FilterRegistrationBean someFilterRegistration1() {
        //新建过滤器注册类
        FilterRegistrationBean registration = new FilterRegistrationBean();
        //添加出事话过滤器
        registration.setFilter( new CustomFilter());
        // 设置过滤器的URL模式
        registration.addUrlPatterns("/*");
        return registration;
    }

}

@Configuration自动配置，由Spring管理

过滤器注册类中，添加过滤器CustomFilter

过滤器的URL模式设置为过滤所有请求

/**
 * 初始化过滤器
* @ClassName: CustomFilter  
* @author Mr.Chengjq
* @date 2018年10月16日  
* @Description: TODO
 */
@WebFilter(filterName = "sessionFilter",urlPatterns = {"/*"})
public class CustomFilter implements Filter {

	private GeneralConfiguration generalConfiguration;
	
	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}
	
	@SuppressWarnings("unused")
	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
			throws IOException, ServletException {
		// TODO Auto-generated method stub
		HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpSession session = request.getSession(false);
        String uri = request.getRequestURI();
        //是否需要过滤
        if(!isNeedFilter(uri)){
        	filterChain.doFilter(request, response);
            return;
        }
        MutableHttpServletRequest requestWrapper = null;  
        if(request instanceof HttpServletRequest) {  
            requestWrapper = new MutableHttpServletRequest((HttpServletRequest) request);  
        }  
        String body = getRequestbody(requestWrapper);
        //验证 start
        //验证方式 1.token验证（头部加 token：xxx） 2.秘钥验证（暂定MD5验证  参数 timestamp：xxx key:MD5(xxx+orange)）
        if(requestWrapper.getHeader("valdateType").equals("1")){
        	 String token = requestWrapper.getHeader("token");
        	 System.out.println("token = "+token);
        }else if(requestWrapper.getHeader("valdateType").equals("2")){
        	 String timestamp =  requestWrapper.getHeader("timestamp");
        	 String key = requestWrapper.getHeader("key");
        	 //验证
        }else{
        	//返回验证方式失败信息
        	throw new BaseException("验证失败");
        }
        //end
        requestWrapper.putHeader("userId", "1111");
        if(requestWrapper == null) {  
        	filterChain.doFilter(request, response);  
        } else {  
        	filterChain.doFilter(requestWrapper, response);  
        }  
        
	}
	
	 private String getRequestbody(HttpServletRequest request) {
	      String param= null;   
	      try {  
	          BufferedReader streamReader = new BufferedReader( new InputStreamReader(request.getInputStream(), "UTF-8"));  
	          StringBuilder responseStrBuilder = new StringBuilder();  
	          String inputStr;  
	          while ((inputStr = streamReader.readLine()) != null)  
	              responseStrBuilder.append(inputStr);  
	            
	          JSONObject jsonObject = JSONObject.parseObject(responseStrBuilder.toString());  
	          param= jsonObject.toJSONString();  
	      } catch (Exception e) {  
	          e.printStackTrace();  
	      }  
	      return param;  
	  } 
	
	public boolean isNeedFilter(String uri) {
		boolean res = true;
		String url = generalConfiguration.getUrl();
		String[] list = url.split(",");
		for(int i = 0 ; i<list.length;i++){
			if(uri.indexOf(list[i])!=-1){
				res =  false;
				break;
			}
		}
		return res;  
    }
	
	private class MutableHttpServletRequest extends HttpServletRequestWrapper {


	    private final Map<String, String> customHeaders;
	    private byte[] body; 

	    public MutableHttpServletRequest(HttpServletRequest request) {
	      super(request);
	      this.customHeaders = new HashMap<String, String>();
	      body = getRequestbody(request).getBytes(Charset.forName("UTF-8")); 
	    }

	    public void putHeader(String name, String value) {
	      this.customHeaders.put(name, value);
	    }

	    @Override
	    public String getHeader(String name) {
	      // check the custom headers first
	      String headerValue = customHeaders.get(name);

	      if (headerValue != null) {
	        return headerValue;
	      }
	      // else return from into the original wrapped object
	      return ((HttpServletRequest) getRequest()).getHeader(name);
	      
	    }

	    @Override
	    public Enumeration<String> getHeaders(String name) {

	      if (customHeaders.containsKey(name)) {
	        return new Enumeration<String>() {
	          boolean hasNext = true;

	          @Override
	          public boolean hasMoreElements() {
	            return hasNext;
	          }

	          @Override
	          public String nextElement() {
	            hasNext = false;
	            return customHeaders.get(name);
	          }
	        };
	      }
	      return super.getHeaders(name);
	    }

	    @Override
	    public Enumeration<String> getHeaderNames() {
	      // create a set of the custom header names
	      Set<String> set = new HashSet<String>(customHeaders.keySet());

	      // now add the headers from the wrapped request object
	      Enumeration<String> e = ((HttpServletRequest) getRequest()).getHeaderNames();
	      while (e.hasMoreElements()) {
	        // add the names of the request headers into the list
	        String n = e.nextElement();
	        set.add(n);
	      }

	      // create an enumeration from the set and return
	      return Collections.enumeration(set);
	    }
	    
	    @Override
		public BufferedReader getReader() throws IOException {
			return new BufferedReader(new InputStreamReader(getInputStream()));
		}
		
		@Override
		public ServletInputStream getInputStream() throws IOException {
			final ByteArrayInputStream bais = new ByteArrayInputStream(body);
			return new ServletInputStream() {
				
				@Override
				public int read() throws IOException {
					return bais.read();
				}

				@Override
				public boolean isFinished() {
					// TODO Auto-generated method stub
					return false;
				}

				@Override
				public boolean isReady() {
					// TODO Auto-generated method stub
					return false;
				}

				@Override
				public void setReadListener(ReadListener readListener) {
					// TODO Auto-generated method stub
					
				}
			};
		}
	  
	}


	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		//初始化bean 获取公共参数配置
		 ServletContext servletContext = arg0.getServletContext();
	     ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);
	     generalConfiguration = (GeneralConfiguration) ctx.getBean("generalConfiguration");
	}

　　在doFilter方法里具体写过滤的内容以及验证

isNeedFilter方法确认是否要过滤，如果不需要过滤，配置文件里配置不需要过滤的请求名，

/**
* 公共参数配置类
* @ClassName: GeneralConfiguration  
* @author Mr.Chengjq
* @date 2018年10月16日  
* @Description: TODO
*/
@PropertySource("classpath:conf/generalConfiguration.properties")
@ConfigurationProperties(prefix = "general")
@Configuration
public class GeneralConfiguration {

    //请求地址
    private String url;

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }
    
    
    
}

这里添加参数配置类，获取generalConfiguration.properties配置文件，以general开头，当然还可以以@Value的方式

这里就不需要过滤了，直接在配置文件写明不需要处理下面请求的地址，直接进入Controlle方法

general.url = /sayHello,/sayHello2

sayHello2 方法如下，请求数据库的信息

    @ResponseBody
    @RequestMapping(value = "/sayHello2",method = RequestMethod.POST)
    public ResponseMsg sayHello2(@RequestHeader("userId") String userId,@RequestBody RequestMsg requestMsg){
        System.out.println(userId);
        JSONObject jsonobject = JSONObject.fromObject(requestMsg.getRoot());
        System.out.println("jsonobject = "+jsonobject);
        //Map<String,Object> res = new HashMap<String,Object>();
        PageResult<UserBaseDTO> res = null;
        List<UserBaseDTO> list = null;
        UserBaseDTO ubt = new UserBaseDTO();
        try {
            StringBuffer logOut = new StringBuffer();
            logOut.append("
");
            logOut.append("cjq2测试");
            logOut.append("
");

            LOGGER.debug(logOut.toString());
            Pagination page = new Pagination();
            page.setPage(1);
            page.setRows(10);;
            res = iUserbaseService.pageUserBase(ubt, page);
            list = res.getList();
            
        } catch (Exception e) {
            // TODO: handle exception
            throw new BaseException("数据错误");
            //LOGGER.error(e.getMessage());
        }
        return new ResponseMsg(requestMsg.getRoute(), GeneralConstant.SUCCESS, "查询成功", res);
    }

在正常开发过程中，对请求参数提和返回参数体会有统一的格式和加密方式，例如上面的的RequestMsg和ResponseMsg

ok 这样就完成了简单的GET和POST请求