【初始化】
示例项目：github地址：https://github.com/gejaingbo/mytest.git
下载项目 并启动
【访问】
localhost:8080/jsonp/testJsonp 为普通返回
数据结构为：{"id":"1","name":"durk","sex":"man"}
localhost:8080/jsonp/testJsonp?callback=hello 为jsonp格式数据返回
数据结构为：hello({"id":"1","name":"durk","sex":"man"})
【核心配置】
package com.example.demo.config; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.serializer.SerializerFeature; import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.core.MethodParameter; import org.springframework.http.MediaType; import org.springframework.http.server.ServerHttpRequest; import org.springframework.http.server.ServerHttpResponse; import org.springframework.http.server.ServletServerHttpRequest; import org.springframework.http.server.ServletServerHttpResponse; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.OutputStream; import java.nio.charset.Charset; import java.util.regex.Pattern; /** * @author gejiangbo * @Description * @date:2019/5/24 * @mail jiangbo.ge@kuwo.cn */ @ControllerAdvice public class Jsonp extends FastJsonHttpMessageConverter implements ResponseBodyAdvice { private static final Pattern CALLBACK_PARAM_PATTERN = Pattern.compile("[0-9A-Za-z_\\.]*"); private final Log logger = LogFactory.getLog(this.getClass()); public static final Charset UTF8 = Charset.forName("UTF-8"); private Charset charset; private SerializerFeature[] features; @Override public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) { HttpServletRequest servletRequest = ((ServletServerHttpRequest) serverHttpRequest).getServletRequest(); HttpServletResponse response = ((ServletServerHttpResponse) serverHttpResponse).getServletResponse(); String value = servletRequest.getParameter("callback"); if(value !=null){ if (this.isValidJsonpQueryParam(value)) { JSONPObject jsonp = new JSONPObject(value, o); String text = JSON.toJSONString(jsonp.getJson(), this.features); String jsonpText = new StringBuilder(jsonp.getFunction()).append("(").append(text).append(")").toString(); byte[] bytes = jsonpText.getBytes(this.charset); OutputStream out = null; try { out = response.getOutputStream(); out.write(bytes); out.flush(); out.close(); } catch (IOException e) { } } if (this.logger.isDebugEnabled()) { this.logger.debug("Ignoring invalid jsonp parameter value: " + value); } } return o; } @Override public boolean supports(MethodParameter methodParameter, Class aClass) { return true; } protected boolean isValidJsonpQueryParam(String value) { return CALLBACK_PARAM_PATTERN.matcher(value).matches(); } public Jsonp() { super(); this.charset = UTF8; this.features = new SerializerFeature[0]; } }
