問題:
先列出來代碼,這是一個測試代碼,用來測試分頁功能是否可以成功查詢到後臺數據:
package com.atguigu;
import com.atguigu.crud.bean.Employee;
import com.github.pagehelper.PageInfo;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import java.util.List;
/**
* 使用Spring測試模塊提供的測試請求功能,測試curd的正確性
*/
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations = {"classpath:applicationContext.xml","classpath:dispatcherServlet.xml"})
public class MvcTest {
//傳入SpringMVC的ioc
WebApplicationContext context;
//虛擬mvc請求,獲取到處理結果。
MockMvc mockMvc;
@Before
public void initMokcMvc(){
mockMvc=MockMvcBuilders.webAppContextSetup(context).build();
}
@Test
public void testPage() throws Exception {
//模擬請求拿到返回值
MvcResult result=mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn","1")).andReturn();
//請求成功以後,請求域中會有pageInfo;我們取出pageInfo進行驗證
MockHttpServletRequest request = result.getRequest();
PageInfo pi= (PageInfo) request.getAttribute("pageInfo");
System.out.println("當前頁面:"+pi.getPageNum());
System.out.println("總頁碼:"+pi.getPages());
System.out.println("總記錄數:"+pi.getTotal());
System.out.println("在頁面需要連續顯示的頁碼");
int[] nums=pi.getNavigatepageNums();
for (int i :nums) {
System.out.print(" "+i);
}
//獲取員工數據
List<Employee> list =pi.getList();
for(Employee employee:list){
System.out.println("ID:"+employee.getEmpId()+"==>name:"+employee.getEmpName());
}
}
}
在運行的時候,就報了這個錯誤
java.lang.IllegalArgumentException: WebApplicationContext is required
at org.springframework.util.Assert.notNull(Assert.java:134)
at org.springframework.test.web.servlet.setup.DefaultMockMvcBuilder.<init>(DefaultMockMvcBuilder.java:52)
at org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup(MockMvcBuilders.java:47)
at com.atguigu.MvcTest.initMokcMvc(MvcTest.java:36)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:85)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:86)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:241)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:87)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
解決方法:
直接百度報的錯誤,說是需要加入下面的註解
@WebAppConfiguration
可是我的代碼已經有了這個註解,還是報了錯,也有說的別的解決方案,都試了一遍,全都沒有解決。
把這個放了一天,今天又回過頭來看。
Debug了一下,跟蹤到異常的地方,異常的拋出是因爲下邊的這個context變量是空值,導致了34行跑出了異常!!!
WebApplicationContext context;
=-=結果發現自己下邊的這個變量沒有給@Autowired註解,佛了。加上註解,跑一下,就跑通了。後來查了下@Autowired註解,這個註解可以對類成員變量、方法及構造函數進行標註,完成自動裝配的工作,想來在下是。
@Autowired
WebApplicationContext context;