【初始化】
示例項目:github地址:https://github.com/gejaingbo/mytest.git
下載項目 並啓動
【訪問】
localhost:8080/jsonp/testJsonp 爲普通返回
數據結構爲:{"id":"1","name":"durk","sex":"man"}
localhost:8080/jsonp/testJsonp?callback=hello 爲jsonp格式數據返回
數據結構爲: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 [email protected]
*/
@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];
}
}