SSH框架应用的一个例子，不知道错在哪里，很郁闷

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SSH框架应用的一个例子，不知道错在哪里，很郁闷5

开发环境：
         MyEclipse7+Tomcat5+MySQL5+Struts1.2+Hibernate3.2+Spring2.0

相关代码：

index.jsp中代码：
<body>
   <form action="addAdmin.do">
      <input type="submit" value="OK" />
   </form>
</body>

AddAdmin.java代码:

package edu.bhu.Kupid.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import edu.bhu.Kupid.domain.Admins;
import edu.bhu.Kupid.service.AdminsService;

public class AddAdmin extends Action {
private AdminsService admServer;
public AdminsService getAdmServer() {
return admServer;
}
public void setAdmServer(AdminsService admServer) {
this.admServer = admServer;
}
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception{
request.setCharacterEncoding("utf-8");
String loginname="admin";
String pwd="admin";
Admins adm=new Admins();
adm.setPwd(pwd);
adm.setId("1234665");
adm.setLoginname(loginname);
adm.setLevel(0);
admServer.addAdmin(adm);
return mapping.findForward("ok");
}
}

AdminsService.java代码：

package edu.bhu.Kupid.service;

import java.util.List;

import edu.bhu.Kupid.domain.Admins;

public interface AdminsService {
public void addAdmin(Admins adm);
public List<Admins> findAdminsByName(String name);
}

AdminsServiceImpl代码：

package edu.bhu.Kupid.service;

import java.util.List;
import edu.bhu.Kupid.domain.Admins;
import edu.bhu.Kupid.persist.AdminsDao;

public class AdminsServiceImpl implements AdminsService {

private AdminsDao admDao;
public void addAdmin(Admins adm) {
admDao.insert(adm);
}

public AdminsDao getAdmDao() {
return admDao;
}

public void setAdmDao(AdminsDao admDao) {
this.admDao = admDao;
}

public List<Admins> findAdminsByName(String name) {

return null;
}

}

AdminsDao.java代码：

package edu.bhu.Kupid.persist;

import edu.bhu.Kupid.domain.Admins;

public interface AdminsDao extends BaseDao<Admins,String>{

}

AdminsDaoImpl.java代码：
package edu.bhu.Kupid.persist;

import edu.bhu.Kupid.domain.Admins;
import edu.bhu.Kupid.persist.BaseDaoImpl;

public class AdminsDaoImpl extends BaseDaoImpl<Admins,String> implements AdminsDao {

}

BaseDao.java代码：

package edu.bhu.Kupid.persist;
import java.io.Serializable;

public interface BaseDao<T, PK extends Serializable> {
public void insert(T entity);

public void update(T entity);

public void delete(T entity);

public void deleteById(PK id);

public T findById(PK id);
}

BaseDaoImpl.java代码：
package edu.bhu.Kupid.persist;

import java.io.Serializable;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class BaseDaoImpl<T,PK extends Serializable> extends HibernateDaoSupport implements BaseDao<T, PK> {

protected Class entityClass;

public void delete(T entity) {
getHibernateTemplate().delete(entity);
}

public void deleteById(PK id) {
getHibernateTemplate().delete(getHibernateTemplate().get(entityClass, id));
}

public T findById(PK id) {
return (T)getHibernateTemplate().get(entityClass, id);
}

public void insert(T entity) {

getHibernateTemplate().save(entity);

}

public void update(T entity) {
getHibernateTemplate().update(entity);
}

}

Admins.java代码（这个BEAN的代码是利用MyEclipse的DBExplorer的Hibernate Reverse Engineering生成的）
package edu.bhu.Kupid.domain;

/**
* Admins entity. @author MyEclipse Persistence Tools
*/

public class Admins implements java.io.Serializable {

// Fields

private String id;
private String loginname;
private String pwd;
private Integer level;

// Constructors

/** default constructor */
public Admins() {
}

/** full constructor */
public Admins(String id, String loginname, String pwd, Integer level) {
this.id = id;
this.loginname = loginname;
this.pwd = pwd;
this.level = level;
}

// Property accessors

public String getId() {
return this.id;
}

public void setId(String id) {
this.id = id;
}

public String getLoginname() {
return this.loginname;
}

public void setLoginname(String loginname) {
this.loginname = loginname;
}

public String getPwd() {
return this.pwd;
}

public void setPwd(String pwd) {
this.pwd = pwd;
}

public Integer getLevel() {
return this.level;
}

public void setLevel(Integer level) {
this.level = level;
}

}

Admins.hbm.xml代码：
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
    <class name="edu.bhu.Kupid.domain.Admins" table="admins" catalog="graduation">
        <id name="id" type="java.lang.String">
            <column name="id" length="128" />
            <generator class="uuid.hex" />
        </id>
        <property name="loginname" type="java.lang.String">
            <column name="loginname" length="20" not-null="true" />
        </property>
        <property name="pwd" type="java.lang.String">
            <column name="pwd" length="20" not-null="true" />
        </property>
        <property name="level" type="java.lang.Integer">
            <column name="level" not-null="true" />
        </property>
    </class>
</hibernate-mapping>

spring-admins.xml代码:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="adminsDao" class="edu.bhu.Kupid.persist.AdminsDaoImpl" parent="baseDao">
</bean>
<bean id="adminsServer" class="edu.bhu.Kupid.service.AdminsServiceImpl">
<property name="admDao">
<ref bean="adminsDao"/>
</property>
</bean>
<bean name="/addAdmin" class="edu.bhu.Kupid.actions.AddAdmin">
<property name="admServer">
<ref bean="adminsServer" />
</property>
</bean>
</beans>

applicationContext.xml代码：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
    <import resource="spring-admins.xml" />

<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>/WEB-INF/classes/configure.properties</value>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName">
<value>${jdbc.driverClassName}</value>
</property>
<property name="url">
<value>${jdbc.url}</value>
</property>
<property name="username">
<value>${jdbc.username}</value>
</property>
<property name="password">
<value>${jdbc.password}</value>
</property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>/edu/bhu/Kupid/domain/Admins.hbm.xml
</value>

</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
${hibernate.dialect}
</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<bean id="baseDao" class="edu.bhu.Kupid.persist.BaseDaoImpl" abstract="true">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
</beans>

struts-config.xml代码：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
<data-sources />
<form-beans />
<global-exceptions />
<global-forwards />
<action-mappings >
    <action path="/addAdmin" type="edu.bhu.Kupid.actions.AddAdmin" validate="false" >
    <forward name="ok" path="/ok.jsp" ></forward>
    </action>

</action-mappings>

<message-resources parameter="edu.bhu.Kupid.resource.ApplicationResources" />
</struts-config>

web.xml代码：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>3</param-value>
    </init-param>
    <init-param>
      <param-name>detail</param-name>
      <param-value>3</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/applicationContext.xml</param-value>
</context-param>
    <servlet>
<servlet-name>SpringContextServlet</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<filter>
<filter-name>OpenSessionInView</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>singleSession</param-name>
<param-value>false</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>OpenSessionInView</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

程序目的：
index.jsp上的按钮被点击后，一条Admin的信息入库。

产生错误：
浏览器中错误信息：
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:173)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

root cause

java.lang.NullPointerException
edu.bhu.Kupid.actions.AddAdmin.execute(AddAdmin.java:37)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:173)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.30 logs.
Apache Tomcat/5.0.30
MyEclipse中错误信息：无。

最后感谢您的帮助。祝您好运。棘手问题郁闷中。。。
问题补充：
AddAdmin第37行是：admServer.addAdmin(adm);
问题补充：
我说的嘛，怎么出空指针，昨天晚上做了这样一个试验：
注释掉原来37行的代码，然后手工创建spring上下文，就能通过。果然是SSH整合中有错误。
//admServer.addAdmin(adm);

ApplicationContext ctx=new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"});
AdminsService admServer=(AdminsService)ctx.getBean("adminsServer");
admServer.addAdmin(adm);
我是第一次做SSH，不太会弄，请各位多指教。
现在还有一个很头疼的地方，就是struts，我用了tiles来做页面的分帧，于是给struts-config.xml文件加入了
<controller processorClass="org.apache.struts.tiles.TilesRequestProcessor" contentType="text/html; charset=UTF-8" />
<message-resources parameter="edu.bhu.Kupid.resource.ApplicationResources" />
<plug-in className="org.apache.struts.tiles.TilesPlugin">
<set-property property="definitions-config" value="/WEB-INF/tiles-config.xml" />
   </plug-in>
结果这段代码一加进来，jsp提交表单到action的时候就找不到action了，浏览器报404异常。

PS：回lewhwa ：因为有一次我发项目，有个仁兄说下载太麻烦，不如直接贴代码的好，于是我就贴了代码。。。

设计模式

2009年2月08日 03:36

Kupid
0
0 0 0

6个答案按时间排序按投票排序

0 0

采纳的答案

<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />
这段代码是ActionServlet用的，ActionServlet里面会有一个RequestProcessor，这个主要是处理请求的，包括创建Action，创建Form，调用validate方法，调用Action的execute方法等等都是这个类来做的，可以参考《精通Struts》99~103页

上面的配置表示不使用Struts的缺省的Processor，而使用Spring提供的Processor，那么创建Action的动作就由这个Spring提供的类来完成，在创建的过程中就可以进行注入了

tiles一般都是使用plugin的方式加入到struts的
可以将下面的配置加入到struts-config.xml

<plug-in className="org.apache.struts.tiles.TilesPlugin" >

      <!-- Path to XML definition file -->
      <set-property property="definitions-config"
                       value="/WEB-INF/tiles-defs.xml" />
    </plug-in>

具体配置可以参考struts-1.2.9-bin.zip(可以去官方网站下载)，在压缩包的webapps目录中有一个struts-blank.war，里面有相关的配置

2009年2月09日 18:06