about 5 years ago
要讓Spring自動幫你轉成Json格式有很多方法，目前採用Jackson2解決方式
1.首先必須匯入幾個jar檔
- jackson-annotations-2.2.0.jar
- jackson-core-2.2.0.jar
- jackson-databind-2.2.0.jar
2.接著在Spring設定檔中必須聲明你的轉接器 如下
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="cacheSeconds" value="0" />
<property name="messageConverters">
<list>
<bean
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
</list>
</property>
</bean>
3.在Controller中可利用HashMap作為回傳物件，透過Spring自動轉換，記得加註解@ResponseBody
@ResponseBody
@SuppressWarnings("finally")
@RequestMapping(value="create",method=RequestMethod.POST)
public Map create(
@ModelAttribute("bank")Bank bank,
BindingResult result
){
Map<String, Object> map = new HashMap<String, Object>();
try {
this.validator.validate(bank, result);
if (result.hasErrors()){
map.put("prc", "0");
map.put("msg", "建檔失敗");
map.put("errorlist", CommonTool.BindingResultToList(result));
}else{
bankservice.create(bank);
map.put("prc", "1");
map.put("msg", "建檔成功");
}
} catch (Exception e) {
log.error("建檔失敗(系統異常)", e);
map = new HashMap<String, Object>();
map.put("prc", "0");
map.put("msg", "建檔失敗(系統異常)");
} finally{
return map;
}
}
4.得到回覆結果如下
{"prc":"1","msg":"建檔成功"}
