94 lines
3.1 KiB
Java
94 lines
3.1 KiB
Java
/**
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* @Title: RestServiceExceptionHandler.java
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* @Package com.nis.restful
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* @Description: TODO(用一句话描述该文件做什么)
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* @author （darnell）
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* @date 2016年8月24日 上午11:31:47
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* @version V1.0
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*/
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package com.nis.restful;
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import java.io.IOException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.servlet.ModelAndView;
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import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver;
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import com.fasterxml.jackson.core.JsonEncoding;
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import com.fasterxml.jackson.core.JsonGenerationException;
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import com.fasterxml.jackson.core.JsonGenerator;
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import com.fasterxml.jackson.databind.JsonMappingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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/**
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* @ClassName: RestServiceExceptionHandler
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* @Description: TODO(rest异常处理，需要判断是否为rest异常，如果不是，则交给正常页面异常处理，否则抛出json格式错误.判断是否rest异常需要具体项目具体实现，默认统一为true)
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* @author (darnell)
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* @date 2016年8月24日 上午11:31:47
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* @version V1.0
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*/
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public class RestServiceExceptionHandler extends DefaultHandlerExceptionResolver{
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protected static final Logger LOGGER = LoggerFactory.getLogger(RestServiceExceptionHandler.class);
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/**
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* 通过xml文件配置，可能存在自定义的异常类型
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*/
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private RestErrorResolver errorResolver;
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@Autowired
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private RestConverter<?> errorConverter; //错误信息转换器
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/**
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* 确认是否rest服务方法，需要子类重写
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* 如果不是则不做处理，直接交给父类处理
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* @param request
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* @return 是否为rest服务
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*/
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public boolean isRestServiceException(HttpServletRequest request){
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return true;
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}
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@Override
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protected ModelAndView doResolveException(HttpServletRequest request,
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HttpServletResponse response, Object handler, Exception ex) {
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if (isRestServiceException(request)) {
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RestResult error = errorResolver.resolveError(request, handler, ex);
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response.setStatus(error.getStatus().value());
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response.setCharacterEncoding("UTF-8");
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response.setContentType("application/json");
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ObjectMapper mapper = new ObjectMapper();
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try {
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JsonGenerator jsonGenerator = mapper.getFactory()
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.createGenerator(response.getOutputStream(),
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JsonEncoding.UTF8);
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mapper.writeValue(jsonGenerator, errorConverter.convert(error));
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} catch (JsonGenerationException e) {
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e.printStackTrace();
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} catch (JsonMappingException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return new ModelAndView();
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} else {
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return super.doResolveException(request, response, handler, ex);
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}
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}
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public RestErrorResolver getErrorResolver() {
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return errorResolver;
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}
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public void setErrorResolver(RestErrorResolver errorResolver) {
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this.errorResolver = errorResolver;
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}
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}
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