Java 如何使用MockMvcResultMatchers.jsonPath

请告诉我：

MvcResult result = this.mockMvc.perform(
                MockMvcRequestBuilders.get(mockUrl))
                .andExpect(MockMvcResultMatchers.status().isOk())
            .andExpect(MockMvcResultMatchers.content().contentType("application/    json;charset=UTF-8"))
                .andDo(MockMvcResultHandlers.print())

但是，用

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = {Content-Type=[application/json;charset=UTF-8]}
     Content type = application/json;charset=UTF-8
             Body = {"version":"0.1"}
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

返回以下错误：

MvcResult result = this.mockMvc.perform(
                MockMvcRequestBuilders.get(mockUrl))
                .andExpect(MockMvcResultMatchers.status().isOk())
            .andExpect(MockMvcResultMatchers.content().contentType("application/    json;charset=UTF-8"))
                .andExpect(jsonPath("$.version").value("0.1"))

---

如何使用jsonPath？

我认为需要将匹配器传递给

jsonPath

方法。比如说

java.lang.AssertionError: No value at JSON path "$.version", exception: net/minidev/json/writer/JsonReaderI

at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:245)
at org.springframework.test.util.JsonPathExpectationsHelper.assertValue(JsonPathExpectationsHelper.java:99)
at org.springframework.test.web.servlet.result.JsonPathResultMatchers$2.match(JsonPathResultMatchers.java:99)
at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:171)
at com.vmware.skyscraper.rts.runbooks.RunbookControllerTest.testGetSingleRunbook(RunbookControllerTest.java:93)
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.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
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$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
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.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

参考文献：

---

你的代码对我来说很好。我用Jackson来解析这些案例，这可能是唯一的区别。检查我的代码：

成绩类别：

.andExpect(jsonPath("$.version", is("0.1")))

控制器：

public class Res {
    String version;

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }
}

答复：

@Test
public void blahTest() throws Exception {
    this.mockMvc.perform(
            MockMvcRequestBuilders.get("/blah"))
            .andExpect(MockMvcResultMatchers.status().isOk())
            .andExpect(MockMvcResultMatchers.content().contentType("application/json;charset=UTF-8"))
            .andExpect(jsonPath("$.version").value("0.1"))
            .andDo(MockMvcResultHandlers.print());
}

---

我只能建议您尝试更改正在使用的Json解析器库。否则，请尝试使用创建问题的简单、最小和可复制示例所需的所有部分更新代码。

此答案的所有功劳归@pramodh（隐藏在OP的评论中）

我遇到了完全相同的问题，安装了他的推荐依赖项修复了所有问题

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = {Content-Type=[application/json;charset=UTF-8]}
     Content type = application/json;charset=UTF-8
             Body = {"version":"0.1"}
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

net.minidev
json智能
2.3
测试
net.minidev
asm
1.0.2
测试

能否显示异常的其余部分？无论如何，看起来您在

application/json

中添加了一些额外的空格，并添加了异常的其余部分。额外的空格是Stackoverflow中的一个输入错误。很抱歉。你找到问题的答案了吗？为了解决这个问题，我不得不绕圈子。对我有效的是添加json smart和net.minidev asm依赖项

net.minidev json smart 2.3测试net.minidev asm 1.0.2测试

这是依赖项

net.minidev json smart 2.3测试net.minidev asm 1.0.2测试

谢谢。你能告诉我你是如何使用杰克逊的吗。我的理解是Res对象隐式地转换为Json。如何使用Jackson显式转换为json？我使用spring boot，Jackson是提供转换的标准库。我想它是由SpringBootStarterWeb自动添加的。

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = {Content-Type=[application/json;charset=UTF-8]}
     Content type = application/json;charset=UTF-8
             Body = {"version":"0.1"}
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

<dependency>
    <groupId>net.minidev</groupId>
    <artifactId>json-smart</artifactId>
    <version>2.3</version>
    <scope>test</scope>
</dependency> 
<dependency> 
    <groupId>net.minidev</groupId>
    <artifactId>asm</artifactId>
    <version>1.0.2</version>
    <scope>test</scope>
</dependency>