使用postman问题

我第一次用postman测接口
url：http://localhost:8080/hhv2/interface/getMyRolls
输入：{
"head": {

"deviceId":"deviceId",
"os":1,
"token":"",

},

"body":{

  "rows": "10",
  "page":"10",
  "type":"1",
}

}
然后send 就报404错误是哪错了？
<style>

.code {
    border: 1px solid #ccc;
    background: #efefef;
    font-size: 16px;
}
.propNS {
    color: #660E7A
}
.propTag {
    color: #000080
}
.propName {
    color: #0000ff;
}
.propValue{
    color: #008000
}

</style>
<div style="height: 100%; margin: 14px 20px 0 20px; overflow-y: auto">

<div style="background: pink; margin-right: 50px; padding: 10px; text-align: center;">
    <div>404 error!请求地址有误！ </div>
    <div>请参照下面的步骤检查你的项目。</div>
</div>
<div>
    <h5>代码生成前，配置相关文件</h5>
</div>
<div style="margin-right: 50px;">
    <ul>
        <li>生成代码包的路径(jeecg_config.properties)：
            
            <pre class="code">
                <span class="propTag">bussi_package</span>=
                <span class="propValue">com.buss</span> // 生成代码的包前缀
            
            </pre>
        </li>
        <li>代码生成界面的配置：
            
            <ol>
                <li>表名：
                    <span class="propValue">guoming_test</span>；
                </li>
                <li>包名：
                    <span class="propValue">guoming</span>；
                </li>
                <li>代码分层风格：
                    <span class="propValue">代码分层</span>；
                </li>
            </ol>
        </li>
    </ul>
</div>
<div>
    <h5>代码生成后，编辑配置文件</h5>
</div>
<div style="margin-right: 50px;">
    <ul>
        <li>
            加载Controller(spring-mvc.xml)
            
            <pre class="code">

<

                <span class="propNS">context</span>
                <span class="propTag">:component-scan</span>
                <span class="propName">base-package=</span>
                <span class="propValue">"com.buss.*"</span>&gt;
  &lt;
                <span class="propNS">context</span>
                <span class="propTag">:exclude-filter</span>
                <span class="propName">type=</span>
                <span class="propValue">"annotation" expression="org.springframework.stereotype.Service"</span> /&gt;

</

                <span class="propNS">context</span>
                <span class="propTag">:component-scan</span>&gt;
            
            </pre>
        </li>
        <li>
            加载service(spring-mvc-hibernate.xml)
                    
            <pre class="code">

<

                <span class="propNS">context</span>
                <span class="propTag">:component-scan</span>
                <span class="propName">base-package=</span>
                <span class="propValue">"com.buss.*"</span>&gt;
  &lt;
                <span class="propNS">context</span>
                <span class="propTag">:exclude-filter</span>
                <span class="propName">type=</span>
                <span class="propValue">"annotation" expression="org.springframework.stereotype.Controller"</span> /&gt;

</

                <span class="propNS">context</span>
                <span class="propTag">:component-scan</span>&gt;
                    
            </pre>
        </li>
        <li>

---

http404，那就是说明页面未找到，因此请确认页面测试地址。