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。
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java报错信息在页面显示的方法:
1、自定义异常类
1 2 3 4 5 6 | public class ProdProcessOrderException extends RuntimeException {
private static final long serialVersionUID = 1L;
public ProdProcessOrderException(String message) {
super(message);
}
}
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2、service层的代码
1 2 3 4 5 6 7 8 9 10 11 | @Service
public class GeneralDpPpOrderServiceImpl implements GeneralDpPpOrderService {
public ResponseEntity<byte[]> downLoadExcel(GeneralDpPpOrder generalDpPpOrder) {
if (pOrderRouting == null) {
throw new ProdProcessOrderException( "当前门板流程单没有设置生产工艺." );
}
}
}
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service层的抛出异常类
3、controller层的代码
1 2 3 4 5 6 7 8 9 | @RestController
@RequestMapping( "/api/mes/gene-dp-pp-order" )
public class GeneralDpPpOrderController extends ExceptionResponse{
@Autowired
private 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);
}
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controller类继承主异常类
4、主异常类代码
1 2 3 4 5 6 7 | public abstract class ExceptionResponse {
@ExceptionHandler(ProdProcessOrderException. class )
@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
public SystemMessage prodProcessOrderException(ProdProcessOrderException e) {
return new SystemMessage(500, e.getMessage());
}
}
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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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 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;
}
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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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