Question

我要在表中插入数据，该表还包含图像文件。我从AJAX发送的json数据是：

通过在javascript中将文件类型更改为base64来发送数据。

我的java类的一些实体是：

Letter.java

public class Letter {

    private BigDecimal letterNo;
    private BigDecimal letterId;
    private String inout;
    private String inoutNo;
    private String inoutDate;
    private String letterIssuedSubBy;
    private String letterFile;
    private String representativeName;
    private String representativeNameEng;
    private BigDecimal selectionId;
    private BigDecimal assessmentNo;
    private String entryBy;
    private String rStatus;

    private byte[] imageFile;
    private String imageTitle;

//i ommited getters and setters
}

ProcessAssessmenttTwo.java是我的Dto类

public class ProcessAnexTwo {

    private String entryBy;
    private String rStatus;

    private BigDecimal selectionId;
    private String inout;
    private String letterReceivedBy;
    private String letterIssuedSubBy;
    private String representativeNameEng;
    private String inoutDate;
    private BigDecimal letterId;
    private BigDecimal assessmentNo;

    private String imageFiles;

    private byte[] imageFile;

    private String imageTitle;
}

数据已成功到达api，但是在插入数据库时却显示错误：

 @PostMapping("saveProcessAnexTwo")
        public ResponseEntity saveAnnexTwo(@RequestBody ProcessAnexTwo processAnexTwo,Model model) {

            System.out.println("entered in saveProcessAnex Two func");

            String imgByte=processAnexTwo.getImageFiles();
            System.out.println(imgByte);
            byte[] nnn=imgByte.getBytes();
            byte[] imageFile= Base64.getEncoder().encode(nnn);
            System.out.println(processAnexTwo.getImageTitle());

            Letter letter = new Letter(processAnexTwo.getLetterId(), processAnexTwo.getInout(),
                    processAnexTwo.getInoutDate(),processAnexTwo.getLetterIssuedSubBy(),null,processAnexTwo.getRepresentativeNameEng(),
                    null,processAnexTwo.getSelectionId(),processAnexTwo.getAssessmentNo(), "PCS",
                    null,imageFile,null);


            BigDecimal letterNo = letterService.insertLetterAnnexTwo(letter);
   return null;

        }

要插入的LetterDaoImpl类为：

@Override
    public BigDecimal saveLetterAnnexTwo(Letter letter) {
        try {
            System.out.println("hitted123 here");
            SimpleJdbcCall simpleJdbcCall = new SimpleJdbcCall(jdbcTemplate).withProcedureName("PCPR_ADD_LETTER");
            Map<String, Object> inParamMap = new HashMap<String, Object>();
            System.out.println(letter.getLetterId());
            inParamMap.put("P_LETTER_NO",null);
            inParamMap.put("P_LETTER_ID",letter.getLetterId());
            inParamMap.put("P_INOUT",letter.getInout());
            inParamMap.put("P_INOUT_NO",null);
            inParamMap.put("P_INOUT_DATE",letter.getInoutDate());
            inParamMap.put("P_LETTER_ISSUED_SUB_BY",letter.getLetterIssuedSubBy());
            inParamMap.put("P_LETTER_FILE",letter.getLetterFile());
            inParamMap.put("P_REPRESENTATIVE_NAME",letter.getRepresentativeName());
            inParamMap.put("P_REPRESENTATIVE_NAME_ENG",letter.getRepresentativeNameEng());
            inParamMap.put("P_SELECTION_ID",letter.getSelectionId());
            inParamMap.put("P_ASSESSMENT_NO",0);
            inParamMap.put("P_ENTRY_BY", letter.getEntryBy());
            inParamMap.put("P_R_STATUS",null);
            inParamMap.put("P_IMAGE_FILE",letter.getImageFile());
            inParamMap.put("P_IMAGE_TITLE",letter.getImageTitle());

            SqlParameterSource in = new MapSqlParameterSource(inParamMap);


            BigDecimal letterNO =  (BigDecimal) simpleJdbcCall.execute(in).get("P_LETTER_NO");


            return letterNO;
            } catch(Exception e) {
                e.printStackTrace();
            }
            return null;


    }

我遇到的错误是：

严重：路径为[]的上下文中的servlet [dispatcher]的Servlet.service（）抛出异常[请求处理失败；嵌套异常是java.lang.NullPointerException]，其根本原因是 java.lang.NullPointerException 在java.util.Base64 $ Decoder.decode（Base64.java:525）在com.pcs.spring.controller.api.FormApiController.saveAnnexTwo（FormApiController.java:222）在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）在org.springframework.web.method.support.InvocableHandlerMethod.doInvoke（InvocableHandlerMethod.java:205）在org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:133）在org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:116）在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:827）在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:738）在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:85）在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:963）在org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:897）在org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:970）在org.springframework.web.servlet.FrameworkServlet.doPost（FrameworkServlet.java:872）在javax.servlet.http.HttpServlet.service（HttpServlet.java:647）在org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:846）在javax.servlet.http.HttpServlet.service（HttpServlet.java:728）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:51）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:222）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:123）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:171）在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:100）在org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:953）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）在org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1041）在org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:603）在org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:312）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1149）在java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:624）在java.lang.Thread.run（Thread.java:748）

春天无法插入byte []“ image / pdf”文件

0 个答案: