controller里面写的代码,很多时候,没有写try{}catch(Exceiption ex){},结果就是系统出错,就算是接口,参数正确也会返回404,这个是不应该的.

       下面是代码,以后参考

package com.lianrong.manager.controller.;
import org.apache.zookeeper.proto.ErrorResponse;
import org.springframework.beans.ConversionNotSupportedException;
import org.springframework.beans.TypeMismatchException;
import org.springframework.http.HttpStatus;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

@ControllerAdvice
@EnableWebMvc
public class RestExceptionHandler {

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public String handleException(){
        return "Exception Deal!";
    }
    //运行时异常
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody
    public ServiceResult runtimeExceptionHandler(RuntimeException runtimeException) {
        return  new ServiceResult(false,"","1000运行时异常");
    }

    //空指针异常
    @ExceptionHandler(NullPointerException.class)
    @ResponseBody
    public ServiceResult nullPointerExceptionHandler(NullPointerException ex) {
        ex.printStackTrace();
        return new ServiceResult(false,"","1001空指针异常");
    }
    //类型转换异常
    @ExceptionHandler(ClassCastException.class)
    @ResponseBody
    public ServiceResult classCastExceptionHandler(ClassCastException ex) {
        ex.printStackTrace();
        return new ServiceResult(false,"","1002类型转换异常");
    }

    //IO异常
    @ExceptionHandler(IOException.class)
    @ResponseBody
    public ServiceResult iOExceptionHandler(IOException ex) {
        ex.printStackTrace();
        return new ServiceResult(false,"","1003IO异常");
    }
    //未知方法异常
    @ExceptionHandler(NoSuchMethodException.class)
    @ResponseBody
    public ServiceResult noSuchMethodExceptionHandler(NoSuchMethodException ex) {
        ex.printStackTrace();
        return new ServiceResult(false,"","1004未知方法异常");
    }

    //数组越界异常
    @ExceptionHandler(IndexOutOfBoundsException.class)
    @ResponseBody
    public ServiceResult indexOutOfBoundsExceptionHandler(IndexOutOfBoundsException ex) {
        ex.printStackTrace();
        return new ServiceResult(false,"","1005数组越界异常");
    }
    //400错误
    @ExceptionHandler({HttpMessageNotReadableException.class})
    @ResponseBody
    public ServiceResult requestNotReadable(HttpMessageNotReadableException ex){
        System.out.println("400..requestNotReadable");
        ex.printStackTrace();
        return new ServiceResult(false,"","400..requestNotReadable");
    }
    //400错误
    @ExceptionHandler({TypeMismatchException.class})
    @ResponseBody
    public ServiceResult requestTypeMismatch(TypeMismatchException ex){
        System.out.println("400..TypeMismatchException");
        ex.printStackTrace();
        return new ServiceResult(false,"","400..TypeMismatchException");
    }
    //400错误
    @ExceptionHandler({MissingServletRequestParameterException.class})
    @ResponseBody
    public ServiceResult requestMissingServletRequest(MissingServletRequestParameterException ex){
        System.out.println("400..MissingServletRequest");
        ex.printStackTrace();
        return new ServiceResult(false,"","400..MissingServletRequest");
    }
    //405错误
    @ExceptionHandler({HttpRequestMethodNotSupportedException.class})
    @ResponseBody
    public ServiceResult request405(){
        System.out.println("405...");
        return new ServiceResult(false,"","405");
    }
    //406错误
    @ExceptionHandler({HttpMediaTypeNotAcceptableException.class})
    @ResponseBody
    public ServiceResult request406(){
        System.out.println("404...");
        return new ServiceResult(false,"","404");
    }
    //500错误
    @ExceptionHandler({ConversionNotSupportedException.class, HttpMessageNotWritableException.class})
    @ResponseBody
    public ServiceResult server500(RuntimeException runtimeException){
        System.out.println("500...");
        return new ServiceResult(false,"","500");
    }

}

　　　　注意事项,先干掉默认的SimpleMappingExceptionResolver

springmvc 默认的异常,dispatcher-servlet.xml
<bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="defaultErrorView" value="error"/>
        <property name="defaultStatusCode" value="500"/>
        <property name="statusCodes">
            <props>
                <prop key="400">400</prop>
                <prop key="error">500</prop>
            </props>
        </property>
        <property name="exceptionMappings">
            <props>
                <prop key="java.sql.SQLException">error</prop>
                <prop key="org.springframework.web.bind.ServletRequestBindingException">error</prop>
                <prop key="java.lang.IllegalArgumentException">error</prop>
                <prop key="org.springframework.validation.BindException">error</prop>
                <prop key="java.lang.ClassNotFoundException">error</prop>
            </props>
        </property>
        <property name="warnLogCategory" value="com.lianrong.manager">
        </property>
    </bean>