我在JSP中访问模型属性(ProcessSolution)时遇到问题，我没有得到以下代码的错误：
这是我的模型类 ProcessSolution.java
package POJO;
import java.util.Arrays;
public class ProcessSolution {
private long processId;
private String processName;
private String processSolutionSteps [];
private String processRemark;
private String processNote;
public ProcessSolution() {
// TODO Auto-generated constructor stub
}
public ProcessSolution(long processId, String processName,
String[] processSolutionSteps, String processRemark, String processNote) {
this.processId = processId;
this.processName = processName;
this.processSolutionSteps = processSolutionSteps;
this.processRemark = processRemark;
this.processNote = processNote;
}
public long getProcessId() {
return processId;
}
public void setProcessId(long processId) {
this.processId = processId;
}
public String getProcessName() {
return processName;
}
public void setProcessName(String processName) {
this.processName = processName;
}
public String[] getProcessSolution() {
return processSolutionSteps;
}
public void setProcessSolution(String[] processSolutionSteps) {
this.processSolutionSteps = processSolutionSteps;
}
public String getProcessRemark() {
return processRemark;
}
public void setProcessRemark(String processRemark) {
this.processRemark = processRemark;
}
public String getProcessNote() {
return processNote;
}
public void setProcessNote(String processNote) {
this.processNote = processNote;
}
@Override
public String toString() {
return "ProcessSolution [processId=" + processId + ", processName="
+ processName + ", processSolutionSteps="
+ Arrays.toString(processSolutionSteps) + ", processRemark="
+ processRemark+ ", processNote=" + processNote + "]";
}
}
这是我的行动类 ProcessSolutionAction
public class ProcessSolutionAction extends ActionSupport implements Preparable, ModelDriven<ProcessSolution>,
SessionAware, ServletRequestAware, ServletContextAware{
private static final long serialVersionUID = 1L;
private ProcessSolution processSolution;
private ProcessService processService;
private short opType;
private String nsec;
private UserClass user;
private Jmain jmain;
private ProcessSolution processSolutions[];
private HttpServletRequest request;
private Map<String, Object> sesstion;
private ServletContext servletContext;
/* (non-Javadoc)
* @see com.opensymphony.xwork2.Preparable#prepare()
*/
@Override
public void prepare() throws Exception {
this.processSolution = new ProcessSolution();
this.jmain = new Jmain();
}
/*public void prepareAddProcessSolution() throws Exception {
this.processService = new ProcessService();
}
public void prepareListProcessSolutions() throws Exception {
System.out.println("prepareListProcessSolution()");
this.jmain = new Jmain();
}
public void prepareEditProcessSolution() throws Exception {
System.out.println("prepareEditProcessSolution()");
this.jmain = new Jmain();
}*/
@Override
public ProcessSolution getModel() {
return this.processSolution;
}
/* (non-Javadoc)
* @see com.opensymphony.xwork2.ActionSupport#execute()
*/
@Override
public String execute() throws Exception {
System.out.println("ProcessSolution#execute()");
/*System.out.println("Process ID :- "+this.request.getParameter("processId"));
System.out.println("this.processSolution Before :- "+this.processSolution);
if( Long.parseLong( this.request.getParameter("processId") ) != 0 )
this.processSolution = this.jmain.getProcessSolution(Long.parseLong( this.request.getParameter("processId") ));
System.out.println("this.processSolution After :- "+this.processSolution);*/
return SUCCESS;
}
public String editProcessSolution() throws Exception {
System.out.println("ProcessSolution#editProcessSolution()");
System.out.println("Process ID :- "+this.request.getParameter("processId"));
System.out.println("this.processSolution Before :- "+this.processSolution);
if( Long.parseLong( this.request.getParameter("processId") ) != 0 )
setProcessSolution( (ProcessSolution) this.jmain.getProcessSolution(Long.parseLong( this.request.getParameter("processId") ) ) );
System.out.println("this.processSolution After :- "+this.processSolution);
return SUCCESS;
}
public ProcessSolution getProcessSolution() {
return processSolution;
}
public void setProcessSolution(ProcessSolution processSolution) {
this.processSolution = processSolution;
}
public short getOpType() {
return opType;
}
public void setOpType(short opType) {
this.opType = opType;
}
public String getNsec() {
return nsec;
}
public void setNsec(String nsec) {
this.nsec = nsec;
}
public UserClass getUser() {
return user;
}
public void setUser(UserClass user) {
this.user = user;
}
public ProcessSolution[] getProcessSolutions() {
return processSolutions;
}
public void setProcessSolutions(ProcessSolution[] processSolutions) {
this.processSolutions = processSolutions;
}
@Override
public void setServletRequest(HttpServletRequest request) {
this.request = request;
}
@Override
public void setSession(Map<String, Object> sesstion) {
this.sesstion = sesstion;
}
@Override
public void setServletContext(ServletContext servletContext) {
this.servletContext = servletContext;
}
}
在Action类的 editProcessSolution（）中，我可以获取My模型，并在方法调用但无法访问JSP中的My Model类属性后正确打印/ p>
以下是我如何访问JSP中的属性
<s:property value="%{[0].processName}" />
<s:property value="%{[1].processName}" />
<s:property value="processId" />
<s:property value="nsec" />
<s:property value="#processSolution.processName" />
<s:property value="%{processSolution.processName}" />
<s:property value="processSolution.processName" />
<s:property value="%{processName}" />
<s:property value="processRemark" />
<s:property value="processNote" />
<s:property value="processSolution.getProcessName()" />
<s:property value="processSolution.getProcessId()" />
<s:if test="%{processName == null}">
NULL
</s:if>
<s:else>
NOT NULL
</s:else>
我的代码出了什么问题？
比你
更新了代码
如果我使用 getter 访问我的模型，我可以访问模型属性
<s:property value="getProcessSolution().getProcessName()" />
但直接我无法访问我的模型
这是我的xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.multipart.maxSixe" value="1000000"/>
<package name="shantaram" extends="struts-default">
<!-- Process Solution Actions -->
<action name="load-process-solution" class="actions.ProcessSolutionAction">
<result name="success">process_solution_entry.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
<action name="list-process-solution" class="actions.ProcessSolutionAction" method="listProcessSolutions">
<result name="success">process_solution_list.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
<action name="add-process-solution" class="actions.ProcessSolutionAction" method="addProcessSolution">
<result name="success">process_solution_entry.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
<action name="edit-process-solution" class="actions.ProcessSolutionAction" method="editProcessSolution">
<result name="success">process_solution_entry.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
<action name="update-process-solution" class="actions.ProcessSolutionAction" method="addProcessSolution">
<result name="success">process_solution_entry.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
<action name="delete-process-solution" class="actions.ProcessSolutionAction" method="deleteProcessSolution">
<result name="success">process_solution_list.jsp</result>
<result name="error">Error.jsp</result>
<result name="login">Login.jsp</result>
</action>
</package>
</struts>
答案 0 :(得分：1)
使用ModelDriven接口时，应在操作中初始化模型类型。在您的情况下，更改ProcessSolutionAction，行：
private ProcessSolution processSolution;
到
private ProcessSolution processSolution = new ProcessSolution();
在prepareDrive（）方法中初始化模型类型不适用于ModelDriven，因为它们是从两个不同的解释器调用的。并且模型驱动拦截器必须成为第一位。以下是一些文档：Model Driven Interceptor
答案 1 :(得分：0)
您需要在 struts.xml 中的dispatch中将操作的结果类型更改为ProcessSolutionAction。
样品：
<result name="success" type="dispatcher">sample.jsp</result>
或删除结果上的type，因为类型的默认值为dispatcher
<result name="success">sample.jsp</result>
也许您的结果类型是重定向的，这就是为什么您无法将动作类的值赋予您的jsp。