java报错信息在页面显示的方法：首先自定义异常类；然后在service层的抛出异常类，controller类继承主异常类；接着定义的主异常类，里面可以写多个自己定义的异常类；最后完成信息类代码。
java报错信息在页面显示的方法：
1、自定义异常类
public class prodprocessorderexception extends runtimeexception {private static final long serialversionuid = 1l;public prodprocessorderexception(string message) {super(message);}}
2、service层的代码
@servicepublic class generaldppporderserviceimpl implements generaldppporderservice {public responseentity<byte[]> downloadexcel(generaldppporder generaldppporder) {//.........//省略代码if (porderrouting == null) {//此处抛出异常throw new prodprocessorderexception("当前门板流程单没有设置生产工艺.");}}}
service层的抛出异常类
3、controller层的代码
@restcontroller@requestmapping("/api/mes/gene-dp-pp-order")public class generaldpppordercontroller extends exceptionresponse{ //继承主异常类@autowiredprivate generaldppporderservice generaldppporderservice;@requestmapping(value = "/download-excel", method = requestmethod.put, consumes = "application/json;charset=utf-8", produces = "application/xls")public responseentity<byte[]> downloadexcel(@requestbody generaldppporder gdp) {return generaldppporderservice.downloadexcel(gdp);}
controller类继承主异常类
4、主异常类代码
public abstract class exceptionresponse {@exceptionhandler(prodprocessorderexception.class)@responsestatus(value = httpstatus.internal_server_error)public systemmessage prodprocessorderexception(prodprocessorderexception e) {return new systemmessage(500, e.getmessage());}}
定义的主异常类，里面可以写多个自己定义的异常类
5、信息类代码
public class systemmessage {private int code;private string message;public systemmessage(int code, string message) {super();this.code = code;this.message = message;}public int getcode() {return code;}public void setcode(int code) {this.code = code;}public string getmessage() {return message;}public void setmessage(string message) {this.message = message;}
通过以上五步，就可以把后台抛出的异常信息，在前端页面显示了
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