Angular 2更改图像src属性

假设我有以下代码：

<img [src]="JwtService.characterImage(enemy)" 
        class="{{enemy.status}}"
    (click)="sidenav.toggle();" style="cursor:pointer">

我如何从我的组件.ts文件中更改此img src asttribute？

在组件中添加imgSrc

class Component {
 constructor(jwtService: JwtService) {
     this.imgSrc = JwtService.characterImage(enemy);
 }
}

<img [src]="imgSrc" 
        class="{{enemy.status}}"
    (click)="sidenav.toggle();" style="cursor:pointer">