spring在其spring测试模块中有mockhttpservletrequest。
如果您使用的是maven，则可能需要向pom.xml添加适当的依赖项。你可以在mvnrepository.com上找到spring测试。

下面是如何使用mockhttpservletrequest：

// given
MockHttpServletRequest request = new MockHttpServletRequest();
request.setServerName("www.example.com");
request.setRequestURI("/foo");
request.setQueryString("param1=value1&param");

// when
String url = request.getRequestURL() + '?' + request.getQueryString(); // assuming there is always queryString.

// then
assertThat(url, is("http://www.example.com:80/foo?param1=value1&param"));

最简单的模仿 HttpServletRequest :
创建匿名子类：

HttpServletRequest mock = new HttpServletRequest ()
{
    private final Map<String, String[]> params = /* whatever */

    public Map<String, String[]> getParameterMap()
    {
        return params;
    }

    public String getParameter(String name)
    {
        String[] matches = params.get(name);
        if (matches == null || matches.length == 0) return null;
        return matches[0];
    }

    // TODO *many* methods to implement here
};

使用jmock、mockito或其他一些通用模拟框架：

HttpServletRequest mock = context.mock(HttpServletRequest.class); // jMock
HttpServletRequest mock2 = Mockito.mock(HttpServletRequest.class); // Mockito

使用httpunit的servletunit，不要模拟请求。

您通常会在集成测试中测试这类东西，集成测试实际上连接到一个服务。要进行单元测试，应该测试servlet的doget/dopost方法使用的对象。
一般来说，您不想在servlet方法中包含太多代码，您应该创建一个bean类来处理操作，并将您自己的对象传递给它，而不是servlet api对象。

对于那些寻找嘲笑方式的人 POST httpservletrequest with json payload，下面是kotlin，但是这里的关键是要模拟 request.getInputStream 从 HttpServletRequest ```
@Mock
private lateinit var request: HttpServletRequest

@Mock
private lateinit var response: HttpServletResponse

@Mock
private lateinit var chain: FilterChain

@InjectMocks
private lateinit var filter: ValidationFilter

@Test
fun continue filter chain with valid json payload() {
val payload = """{
"firstName":"aB",
"middleName":"asdadsa",
"lastName":"asdsada",
"dob":null,
"gender":"male"
}""".trimMargin()

whenever(request.requestURL).
    thenReturn(StringBuffer("/profile/personal-details"))
whenever(request.method).
    thenReturn("PUT")
whenever(request.inputStream).
    thenReturn(DelegatingServletInputStream(ByteArrayInputStream(payload.toByteArray())))

filter.doFilter(request, response, chain)

verify(chain).doFilter(request, response)

}