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| // HTTP 请求建造者
class HttpRequestBuilder {
private String url;
private String method = "GET";
private Map<String, String> headers = new HashMap<>();
private Map<String, String> queryParams = new HashMap<>();
private String body;
private int timeout = 30000; // 默认30秒超时
public HttpRequestBuilder url(String url) {
this.url = url;
return this;
}
public HttpRequestBuilder get() {
this.method = "GET";
return this;
}
public HttpRequestBuilder post() {
this.method = "POST";
return this;
}
public HttpRequestBuilder put() {
this.method = "PUT";
return this;
}
public HttpRequestBuilder delete() {
this.method = "DELETE";
return this;
}
public HttpRequestBuilder header(String name, String value) {
headers.put(name, value);
return this;
}
public HttpRequestBuilder headers(Map<String, String> headers) {
this.headers.putAll(headers);
return this;
}
public HttpRequestBuilder contentType(String contentType) {
return header("Content-Type", contentType);
}
public HttpRequestBuilder authorization(String token) {
return header("Authorization", "Bearer " + token);
}
public HttpRequestBuilder param(String name, String value) {
queryParams.put(name, value);
return this;
}
public HttpRequestBuilder params(Map<String, String> params) {
queryParams.putAll(params);
return this;
}
public HttpRequestBuilder body(String body) {
this.body = body;
return this;
}
public HttpRequestBuilder jsonBody(Object obj) {
// 这里简化处理，实际应该使用JSON库
this.body = obj.toString();
return contentType("application/json");
}
public HttpRequestBuilder timeout(int timeoutMs) {
this.timeout = timeoutMs;
return this;
}
public HttpRequest build() {
if (url == null) {
throw new IllegalStateException("URL is required");
}
return new HttpRequest(url, method, headers, queryParams, body, timeout);
}
}
// HTTP 请求对象
class HttpRequest {
private final String url;
private final String method;
private final Map<String, String> headers;
private final Map<String, String> queryParams;
private final String body;
private final int timeout;
public HttpRequest(String url, String method, Map<String, String> headers,
Map<String, String> queryParams, String body, int timeout) {
this.url = url;
this.method = method;
this.headers = new HashMap<>(headers);
this.queryParams = new HashMap<>(queryParams);
this.body = body;
this.timeout = timeout;
}
public String execute() {
// 模拟HTTP请求执行
StringBuilder result = new StringBuilder();
result.append("执行HTTP请求:\n");
result.append("URL: ").append(getFullUrl()).append("\n");
result.append("Method: ").append(method).append("\n");
result.append("Headers: ").append(headers).append("\n");
if (body != null) {
result.append("Body: ").append(body).append("\n");
}
result.append("Timeout: ").append(timeout).append("ms\n");
result.append("请求执行成功!");
return result.toString();
}
private String getFullUrl() {
if (queryParams.isEmpty()) {
return url;
}
StringBuilder fullUrl = new StringBuilder(url);
fullUrl.append("?");
boolean first = true;
for (Map.Entry<String, String> param : queryParams.entrySet()) {
if (!first) {
fullUrl.append("&");
}
fullUrl.append(param.getKey()).append("=").append(param.getValue());
first = false;
}
return fullUrl.toString();
}
// Getter methods
public String getUrl() { return url; }
public String getMethod() { return method; }
public Map<String, String> getHeaders() { return new HashMap<>(headers); }
public Map<String, String> getQueryParams() { return new HashMap<>(queryParams); }
public String getBody() { return body; }
public int getTimeout() { return timeout; }
}
// 使用示例
public class HttpRequestBuilderDemo {
public static void main(String[] args) {
System.out.println("=== HTTP 请求建造者演示 ===\n");
// GET 请求
HttpRequest getRequest = new HttpRequestBuilder()
.url("https://api.example.com/users")
.get()
.param("page", "1")
.param("limit", "10")
.header("User-Agent", "MyApp/1.0")
.authorization("abc123token")
.timeout(5000)
.build();
System.out.println("GET 请求：");
System.out.println(getRequest.execute());
System.out.println("\n" + "=".repeat(50) + "\n");
// POST 请求
HttpRequest postRequest = new HttpRequestBuilder()
.url("https://api.example.com/users")
.post()
.contentType("application/json")
.authorization("abc123token")
.body("{\"name\": \"张三\", \"email\": \"zhangsan@example.com\"}")
.timeout(10000)
.build();
System.out.println("POST 请求：");
System.out.println(postRequest.execute());
System.out.println("\n" + "=".repeat(50) + "\n");
// PUT 请求
Map<String, String> commonHeaders = new HashMap<>();
commonHeaders.put("Accept", "application/json");
commonHeaders.put("Cache-Control", "no-cache");
HttpRequest putRequest = new HttpRequestBuilder()
.url("https://api.example.com/users/123")
.put()
.headers(commonHeaders)
.contentType("application/json")
.authorization("abc123token")
.body("{\"name\": \"李四\", \"email\": \"lisi@example.com\"}")
.build();
System.out.println("PUT 请求：");
System.out.println(putRequest.execute());
}
}
|