我用了一个方法将这表AdrReport的数据显示了出来,在这个显示的页面中,还需要显示另外一张表AppriseInfo中的字段appraiseContent 把它的值也显示在这个页面当中,但是这张表AppriseInfo中的字段appraiseContent没有取出来,下面的红字报了Caused by: java.lang.NullPointerException,我也不知道哪里写得有问题,帮我看看,非常的感谢!
我在action的方法中是这样写的:
public ActionForward SearchAdrReportNo(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response) throws ParseException{
Integer id = Integer.parseInt(request.getParameter("idno"));
AdrReport adrReport = adrReportBiz.getAdrReportNo(id); AppriseInfo appriseBean = adrReportBiz.getAppriseInfoNo(id);
String appraiseContent = appriseBean.getAppraiseContent();
request.setAttribute("appraiseContent", appraiseContent);
System.out.println("appraiseContent:"+appraiseContent);//打出来是空值
request.getSession().setAttribute("reporteeddetail", adrReport);
return mapping.findForward("report_done");
}另外我在页面上也加了这两句:<input type="hidden" name="appraiseContent" /><td width="10%">
<%=request.getAttribute("appraiseContent") %>
</td>
我在action的方法中是这样写的:
public ActionForward SearchAdrReportNo(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response) throws ParseException{
Integer id = Integer.parseInt(request.getParameter("idno"));
AdrReport adrReport = adrReportBiz.getAdrReportNo(id); AppriseInfo appriseBean = adrReportBiz.getAppriseInfoNo(id);
String appraiseContent = appriseBean.getAppraiseContent();
request.setAttribute("appraiseContent", appraiseContent);
System.out.println("appraiseContent:"+appraiseContent);//打出来是空值
request.getSession().setAttribute("reporteeddetail", adrReport);
return mapping.findForward("report_done");
}另外我在页面上也加了这两句:<input type="hidden" name="appraiseContent" /><td width="10%">
<%=request.getAttribute("appraiseContent") %>
</td>
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* 通过审批信息表的id查出相关信息
* @param id
* AppriseInfo
* @throws HibernateException
*/
public AppriseInfo getAppriseInfoNo(Serializable id) throws HibernateException;我就是调用上面的方法,来查出相关信息的,下面就是一个bean
/**
*
*/
package com.adr.report.reportmanage.bean;import com.adr.report.reportmanage.bean.AdrReport;/**
* AppriseInfo generated by MyEclipse - Hibernate Tools
*/
public class AppriseInfo implements java.io.Serializable {
//Fields
private Integer id;
public AppriseInfo() {
// TODO Auto-generated constructor stub
}
private String unitName;
private String appraise;
private String appraiseContent;
private String currentUser;
private Integer grade; private AdrReport report;
public AdrReport getReport() {
return report;
} public void setReport(AdrReport report) {
this.report = report;
} public AppriseInfo(Integer id,String unitName, String appraise, String appraiseContent, String currentUser, Integer grade) {
super();
this.id = id;
this.unitName = unitName;
this.appraise = appraise;
this.appraiseContent = appraiseContent;
this.currentUser = currentUser;
this.grade = grade;
} public String getAppraise() {
return appraise;
} public void setAppraise(String appraise) {
this.appraise = appraise;
} public String getAppraiseContent() {
return appraiseContent;
} public void setAppraiseContent(String appraiseContent) {
this.appraiseContent = appraiseContent;
} public String getCurrentUser() {
return currentUser;
} public void setCurrentUser(String currentUser) {
this.currentUser = currentUser;
} public Integer getGrade() {
return grade;
} public void setGrade(Integer grade) {
this.grade = grade;
} public Integer getId() {
return id;
} public void setId(Integer id) {
this.id = id;
}
public String getUnitName() {
return unitName;
} public void setUnitName(String unitName) {
this.unitName = unitName;
}
}
看看哪里出了问题?