系统框架搭建的前期过程中，为了约束代码规范，我们会对一些通用功能做一些处理，比如声明一些系统公用错误类、封装通用返回结果、统一异常处理等，这样做的优势是团队开发过程中能够形成统一的代码规范，增强代码可读性，同时又便于后期代码维护。本文主要介绍下框架中异常的处理：
1.声明全局异常处理类，并添加@controlleradvice和@restcontroller注解
代码如下：
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@controlleradvice @restcontroller public class globalexceptionhandler {
private final logger logger = logger.getlogger(globalexceptionhandler. class );
//空指针异常 @exceptionhandler (nullpointerexception. class ) public map<string, object> nullpointer(nullpointerexception e,httpservletrequest req){ logger.error(e.getmessage()); e.printstacktrace(); return resultobject.newresultobj(errorcode.nullpointer); }
//io异常 @exceptionhandler (ioexception. class ,httpservletrequest req, httpservletresponse res) public map<string, object> ioexception(ioexception e){ logger.error(e.getmessage()); e.printstacktrace(); return resultobject.newresultobj(errorcode.ioexception); }
//权限不足异常 @exceptionhandler (unauthorizedexception. class ) public map<string, object> unauth(httpservletrequest req, httpservletresponse res){ return resultobject.newresultobj(errorcode.unauth); }
//未登录异常 @exceptionhandler (authorizationexception. class ) public map<string, object> unlogin(httpservletrequest req, httpservletresponse res){ return resultobject.newresultobj(errorcode.notlogin); }
//其它异常 @exceptionhandler (exception. class ) public map<string, object> error(exception e,httpservletrequest req, httpservletresponse res){ logger.error(e.getmessage()); e.printstacktrace(); return resultobject.newresultobj(errorcode.system); }
} |
2.声明系统通用错误处理类
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/** * 系统通用错误处理类 */ public class errorcode {
//返回码 private int code = 0 ;
//描述信息 private string errmsg = "success" ;
//成功 public static final errorcode success = new errorcode( 0 , "success" ); public static final errorcode params = new errorcode( 100000 , "参数错误" ); public static final errorcode system = new errorcode( 100001 , "系统错误" ); public static final errorcode unlogin = new errorcode( 100002 , "未登录" ); public static final errorcode unauth = new errorcode( 100003 , "权限错误" ); public static final errorcode nullpointer = new errorcode( 100004 , "空指针错误" ); public static final errorcode ioexception = new errorcode( 100005 , "io错误" ); public static final errorcode upload_fail = new errorcode( 100006 , "文件上传失败" ); public static final errorcode repeat = new errorcode( 100007 , "数据已存在" );
public errorcode() {}
@override public string tostring() { return string.format( "{\"errmsg\": \"%s\", \"code\": %d}" , errmsg, code); }
public int getcode() { return code; }
public errorcode setcode( int code) { this .code = code; return this ; }
public string geterrmsg() { return errmsg; }
public errorcode seterrmsg(string errmsg) { this .errmsg = errmsg; return this ; }
public errorcode( int code, string errmsg) { this .code = code; this .errmsg = errmsg; }
} |
3.声明全局异常处理类中的结果返回类
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import java.util.hashmap; import java.util.map; import javax.servlet.http.httpservletresponse; import com.xxx.errorcode; //此处引用自己errorcode类所在的包路径 import org.json.jsonobject;
public class resultobject {
/** * 输出错误信息 * @param errorcode */ public static map<string, object> newresultobj(errorcode errorcode){ map<string, object> obj = new hashmap<string, object>(); obj.put( "code" , errorcode.getcode()); obj.put( "errmsg" , errorcode.geterrmsg()); return obj; }
/** * 输出带数据的成功信息 * @param data */ public static map<string, object> newresultobj(object data){ map<string, object> obj = new hashmap<string, object>(); obj.put( "code" , errorcode.success.getcode()); obj.put( "errmsg" , errorcode.success.geterrmsg()); if ( null != data){ obj.put( "data" , data); } return obj; }
/** * 输出带数据的错误信息 * @param errorcode * @param data */ public static map<string, object> newresultobj(errorcode errorcode, object data){ map<string, object> obj = new hashmap<string, object>(); obj.put( "code" , errorcode.getcode()); obj.put( "errmsg" , errorcode.geterrmsg()); if ( null != data){ obj.put( "data" , data); } return obj; }
/** * 输出结果 */ public static void outputresult(httpservletresponse response, errorcode errorcode){ try { jsonobject json = new jsonobject(); json.put( "code" , errorcode.getcode()); json.put( "errmsg" , errorcode.geterrmsg());
response.setcharacterencoding( "utf-8" ); response.setcontenttype( "application/json;charset=utf-8" ); response.getwriter().write(json.tostring()); } catch (exception e1) { } } } |
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原文链接：https://blog.csdn.net/qq_34279303/article/details/114680758
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