Netty获取Http参数反射执行方法参数映射

项目地址&＃xff1a;easy-plat: 学习spring core &＃xff0c;netty开发高性能框架 (gitee.com)

获取参数名称的一种方式参数映射&＃xff1a;

String[] parameterNames &＃61;new LocalVariableTableParameterNameDiscoverer().getParameterNames(method);

反射映射参数&＃xff1a;

/*** 构造一个请求参数对象*/
public class RequestParam {//是否是参数体private boolean isBody;//参数体&＃xff0c;一个参数名独占一行private List> data;public boolean isBody() {return isBody;}public void setBody(boolean body) {isBody &＃61; body;}public List> getData() {return data;}public void setData(List> data) {this.data &＃61; data;}
}

解析原始参数&＃xff08;解决其他版本无法获取报文体参数&＃xff09;&＃xff1a;

解决这篇文章无法获取POST报文体参数&＃xff1a;(1条消息) Netty4 HTTP请求参数解析(GET, POST)_Mrs陶的博客-CSDN博客_netty获取http参数

/*** HTTP请求参数解析器, 支持GET, POST*/
public class RequestParser {private FullHttpRequest fullReq;/*** 构造一个解析器** &＃64;param req*/public RequestParser(FullHttpRequest req) {this.fullReq &＃61; req;}/*** 解析请求参数** &＃64;return 包含所有请求参数的键值对, 如果没有参数, 则返回空Map* &＃64;throws RuntimeException* &＃64;throws IOException*/public RequestParam parse() throws Exception, IOException {HttpMethod method &＃61; fullReq.method();RequestParam param &＃61; new RequestParam();Map parmMap &＃61; new HashMap<>();List> paramList &＃61; new ArrayList<>();if (HttpMethod.GET &＃61;&＃61; method) {param.setBody(false);// 是GET请求QueryStringDecoder decoder &＃61; new QueryStringDecoder(fullReq.uri());decoder.parameters().entrySet().forEach(entry -> {// entry.getValue()是一个List, 只取第一个元素parmMap.put(entry.getKey(), entry.getValue().get(0));paramList.add(parmMap);});} else if (HttpMethod.POST &＃61;&＃61; method) {// 是POST请求String content &＃61; fullReq.content().toString(Charset.defaultCharset());JSONObject jsonObject &＃61; JSONUtil.parseObj(content);jsonObject.forEach((key, value) -> {parmMap.put(key, value);});param.setBody(true);paramList.add(parmMap);} else {// 不支持其它方法throw new RuntimeException(""); // 这是个自定义的异常, 可删掉这一行}param.setData(paramList);return param;}
}

将参数映射成反射所需要的Object[]数组参数&＃xff1a;

/*** 参数映射*/public static Object[] mappingArgs(Method method, RequestParam requestParam) {// 判断params不为空Class[] parameterTypes &＃61; method.getParameterTypes();Object[] args &＃61; new Object[parameterTypes.length];//是否是json报文体String[] parameterNames &＃61; new LocalVariableTableParameterNameDiscoverer().getParameterNames(method);if (requestParam.isBody()) {Map param &＃61; requestParam.getData().get(0);List list &＃61; new ArrayList<>();//参数中多个对象映射param.forEach((k, v) -> {ParamVo paramVo &＃61; new ParamVo();paramVo.setName(k);paramVo.setValue(v);list.add(paramVo);});Class[] paramTypes &＃61; method.getParameterTypes();for (int i &＃61; 0; i paramType &＃61; paramTypes[i];Object value &＃61; list.get(i1).getValue();String jsonStr &＃61; JSONUtil.toJsonStr(value.toString());// 将json参数映射成对象System.out.println(paramType);//判断paramType是否为字符串类型Object obj &＃61; null;if (paramType &＃61;&＃61; String.class || paramType &＃61;&＃61; Integer.class || paramType &＃61;&＃61; Long.class || paramType &＃61;&＃61; Double.class || paramType &＃61;&＃61; Float.class || paramType &＃61;&＃61; Boolean.class) {obj &＃61; jsonStr;} else {if (paramType&＃61;&＃61; Date.class){obj &＃61; jsonStr;}else if (paramType&＃61;&＃61; List.class){obj &＃61; JSONUtil.toList(jsonStr, paramType);}else if (paramType&＃61;&＃61; Map.class){obj &＃61; JSONUtil.toBean(jsonStr, paramType);}else {obj &＃61; JSONUtil.toBean(jsonStr, paramType);}}args[i] &＃61; obj;}}}} else {List> data &＃61; requestParam.getData();for (int i &＃61; 0; i map &＃61; data.get(j);if (map.containsKey(parameterNames[i])) {Object o &＃61; map.get(parameterName);args[i] &＃61; o;}}}}return args;}

参数包装类&＃xff1a;

public class ParamVo {private String name;private Object value;public Object getValue() {return value;}public void setValue(Object value) {this.value &＃61; value;}public String getName() {return name;}public void setName(String name) {this.name &＃61; name;}
}


执行反射方法&＃xff1a;

String content &＃61; (String) method.invoke&＃xff08;object, args);