麻烦老师帮我看看，找不到方法
java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.imooc.sm.global.DispatcherServlet.service(DispatcherServlet.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.imooc.sm.global.EncodingFilter.doFilter(EncodingFilter.java:19) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:528) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NoSuchMethodError: com.imooc.sm.dao.StaffDao.selectById(Ljava/lang/Integer;)Lcom/imooc/sm/entity/Staff; at com.imooc.sm.service.impl.StaffServiceImpl.get(StaffServiceImpl.java:33) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at com.sun.proxy.$Proxy20.get(Unknown Source) at com.imooc.sm.controller.StaffController.detail(StaffController.java:117) ... 30 more
package com.imooc.sm.service.impl;
import com.imooc.sm.dao.StaffDao;
import com.imooc.sm.entity.Staff;
import com.imooc.sm.service.StaffService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.Date;
import java.util.List;
@Service("staffService")
public class StaffServiceImpl implements StaffService {
@Autowired
private StaffDao staffDao;
public void add(Staff staff) {
staff.setPassword("123456");
staff.setWorkTime(new Date());
staff.setStatus("正常");
staffDao.insert(staff);
}
public void remove(Integer id) {
staffDao.delete(id);
}
public void edit(Staff staff) {
staffDao.update(staff);
}
public Staff get(Integer id) {
System.out.println("1111111111");
return staffDao.selectById(id);
}
public List<Staff> getAll() {
return staffDao.selectAll();
}
}package com.imooc.sm.controller;
import com.imooc.sm.entity.Department;
import com.imooc.sm.entity.Staff;
import com.imooc.sm.service.DepartmentService;
import com.imooc.sm.service.StaffService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
@Controller("staffController")
public class StaffController {
@Autowired
private StaffService staffService;
@Autowired
private DepartmentService departmentService;
public void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Staff> list = staffService.getAll();
request.setAttribute("LIST",list);
request.getRequestDispatcher("../staff_list.jsp").forward(request,response);
}
public void toAdd(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<Department> list = departmentService.getAll();
request.setAttribute("DLIST",list);
request.getRequestDispatcher("../staff_add.jsp").forward(request,response);
}
public void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String account = request.getParameter("account");
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String idNumber = request.getParameter("idNumber");
String info =request.getParameter("info");
Date bornDate=null;
try {
bornDate = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("bornDate"));
} catch (ParseException e) {
e.printStackTrace();
}
Integer did = Integer.parseInt(request.getParameter("did"));
Staff staff = new Staff();
staff.setInfo(info);
staff.setBornDate(bornDate);
staff.setIdNumber(idNumber);
staff.setDid(did);
staff.setAccount(account);
staff.setName(name);
staff.setSex(sex);
/**由于staff是之前数据库中查询出来的，department属性没有修改，只修改了did属性
* 所以，我们把department根据did属性查询出来并设置给staff的department属性*/
Department department = departmentService . get(did);
staff.setDepartment (department);
//判断一下， 如果当前修改的用户与当前登录的用户是同一个，把修改后的用户放到session 中
// Staff staff1 = (Staff) request. getSession(). getAttribute("USER");
// if(staff1. getId().equals(staff.getId())){
// request.getSession(). setAttribute("USER" ,staff);
// }
staffService.add(staff);
response.sendRedirect("list.do");
}
public void toEdit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = Integer.parseInt(request.getParameter("id"));
System.out.println(id);
Staff staff = staffService.get(id);
System.out.println(staff);
request.setAttribute("OBJ",staff);
List<Department> list = departmentService.getAll();
request.setAttribute("DLIST",list);
request.getRequestDispatcher("../staff_edit.jsp").forward(request,response);
}
public void edit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = Integer.parseInt(request.getParameter("id"));
String account = request.getParameter("account");
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String idNumber = request.getParameter("idNumber");
String info =request.getParameter("info");
Date bornDate=null;
try {
bornDate = new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("bornDate"));
} catch (ParseException e) {
e.printStackTrace();
}
Integer did = Integer.parseInt(request.getParameter("did"));
Staff staff = staffService.get(id);
staff.setInfo(info);
staff.setBornDate(bornDate);
staff.setIdNumber(idNumber);
staff.setDid(did);
staff.setAccount(account);
staff.setName(name);
staff.setSex(sex);
staffService.edit(staff);
response.sendRedirect("list.do");
}
public void remove(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = Integer.parseInt(request.getParameter("id"));
staffService.remove(id);
response.sendRedirect("list.do");
}
public void detail(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Integer id = Integer.parseInt(request.getParameter("id"));
Staff staff = staffService.get(id);
request.setAttribute("OBJ",staff);
request.getRequestDispatcher("../staff_detail.jsp").forward(request,response);
}
}15
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2回答
同学你好，检查同学的代码并没有什么问题，建议同学删除target文件，重启项目再试试。
祝：学习愉快~
不停奔跑的小恐龙
2020-01-21 22:39:17
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.4//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.imooc.sm.dao.StaffDao">
<resultMap id="resultMap" type="Staff">
<id property="id" column="id" javaType="Integer"/>
<result property="account" column="account" javaType="String"/>
<result property="password" column="password" javaType="String"/>
<result property="status" column="status" javaType="String"/>
<result property="did" column="did" javaType="Integer"/>
<result property="name" column="name" javaType="String"/>
<result property="sex" column="sex" javaType="String"/>
<result property="idNumber" column="id_number" javaType="String"/>
<result property="workTime" column="work_time" javaType="java.util.Date"/>
<result property="leaveTime" column="leave_time" javaType="java.util.Date"/>
<result property="bornDate" column="born_date" javaType="java.util.Date"/>
<result property="info" column="info" javaType="String"/>
<association property="department" column="did" javaType="Department" select="com.imooc.sm.dao.DepartmentDao.selectById" />
</resultMap>
<insert id="insert" parameterType="Staff" useGeneratedKeys="true">
insert into staff(account,password,status,did,name,sex,id_number,work_time,leave_time,born_date,info)
values(#{account},#{password},#{status},#{did},#{name},#{sex},#{idNumber},#{workTime},#{leaveTime},#{bornDate},#{info})
</insert>
<delete id="delete" parameterType="Integer">
delete from staff where id=#{id}
</delete>
<update id="update" parameterType="Staff">
update staff set account=#{account},password=#{password},status=#{status},
did=#{did},name=#{name},sex=#{sex},id_number=#{idNumber},
work_time=#{workTime},leave_time=#{leaveTime},born_date=#{bornDate},info=#{info} where id=#{id}
</update>
<select id="selectById" parameterType="Integer" resultMap="resultMap">
select * from staff where id=#{id}
</select>
<select id="selectAll" resultMap="resultMap">
select * from staff
</select>
</mapper>package com.imooc.sm.dao;
import com.imooc.sm.entity.Staff;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository("staffDao")
public interface StaffDao {
void insert(Staff staff);
void delete(Integer id);
void update(Staff staff);
Staff selectById(Integer id);
List<Staff> selectAll();
}可以获取到前端传来的属性
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