注意：我只要是解决自定义返回Json 和异常处理问题
新建一个类 AjaxResult 继承 StrutsResultSupport 看看代码吧
public class AjaxResult extends StrutsResultSupport {
/**
* serialVersionUID
*/
private static final long serialVersionUID = 1L;
private static final String AJAX_SUCCESS = "{\"success\":true}";
private static final String SUCCESS_PERFIX = "{\"success\":true,result:[";
private static final String FAILURE_PERFIX = "{\"success\":false,result:[],";
private static final String SUFFIX = "]}";
private Writer writer;
private String defaultEncoding = "UTF-8";
@Inject("struts.i18n.encoding")
public void setDefaultEncoding(String encoding) {
this.defaultEncoding = encoding;
}
protected void doExecute(String finalLocation, ActionInvocation invocation)
throws Exception {
Object action = invocation.getAction();
String responseData = "";
if ((action instanceof BaseAction)) {
BaseAction ajaxAction = (BaseAction) action;
HttpServletResponse response = ServletActionContext.getResponse();
String encoding = getEncoding(finalLocation);
String contentType = getContentType(finalLocation);
if (encoding != null) {
contentType = contentType + ";charset=" + encoding;
}
response.setContentType(contentType);
String successData = ajaxAction.getResponseData();
if (successData != null) {
if ("success".equals(successData)) {
responseData = "{\"success\":true}";
} else {
responseData = successData;
}
}
// if(true){
// String errorResultLocation = ajaxAction.getErrorResultLocation();
// String exceptionMessage =
// invocation.getStack().findString("exception.message");
// exceptionMessage = exceptionMessage.replaceAll("\r", " ");
// exceptionMessage = exceptionMessage.replaceAll("\n", " ");
// exceptionMessage = exceptionMessage.replaceAll("\t", " ");
// responseData = getFailureData(null, exceptionMessage);
// }
getWriter().write(responseData);
}
}
private String getFailureData(String errorResultLocation,
String exceptionMessage) {
String errors = "errors:[{msg:\"" + exceptionMessage + "\"}]";
// if (StringUtils.isNotBlank(errorResultLocation)) {
// String target = ",\"target\":\"" + errorResultLocation;
// return "{\"success\":false,result:[]," + errors + target + "\"}";
// }
return "{\"success\":false,result:[]," + errors + "}";
}
public void setWriter(Writer writer) {
this.writer = writer;
}
protected Writer getWriter() throws IOException {
if (this.writer != null) {
return this.writer;
}
return ServletActionContext.getResponse().getWriter();
}
protected String getContentType(String templateLocation) {
return "application/json";
}
protected String getEncoding(String templateLocation) {
String encoding = this.defaultEncoding;
if (encoding == null) {
encoding = System.getProperty("file.encoding");
}
if (encoding == null) {
encoding = "UTF-8";
}
return encoding;
}
}
接下来，我们需要一个Struts 的配置文件
<package name="ajax-default" abstract="true" extends="struts-default">
<result-types>
<result-type name="ajax"
class="com.guy.core.common.util.AjaxResult" />
</result-types>
<global-results>
<result name="ajax" type="ajax" />
</global-results> </package>
之后我们新建一个公用类 BaseAction
public class BaseAction extends ActionSupport implements ModelDriven,SessionAware, ParameterAware, ServletRequestAware, ServletResponseAware{
/**
* serialVersionUID
*/
protected final Log logger = LogFactory.getLog(getClass());
private static final long serialVersionUID = 1L;
public String SUCCESS="SUCCESS";
public static final String AJAX = "ajax";
protected Map session;
protected Map parameters;
protected HttpServletRequest servletRequest;
protected HttpServletResponse servletResponse;
private String responseData;
protected void createJSonData(String jsonData) {
setResponseData(jsonData);
}
public String getResponseData() {
return responseData;
}
public void setResponseData(String responseData) {
this.responseData = responseData;
}
public Map getSession() {
return session;
}
public void setSession(Map session) {
this.session = session;
}
public Map getParameters() {
return parameters;
}
public void setParameters(Map parameters) {
this.parameters = parameters;
}
public HttpServletRequest getServletRequest() {
return servletRequest;
}
public void setServletRequest(HttpServletRequest servletRequest) {
this.servletRequest = servletRequest;
}
public HttpServletResponse getServletResponse() {
return servletResponse;
}
public void setServletResponse(HttpServletResponse servletResponse) {
this.servletResponse = servletResponse;
}
@Override
public Object getModel() {
return null;
}
}
所有的action 都继承BaseAction ModelDriven 我就不在解释了百度去
例如
public class LoginAction extends BaseAction{
createJSonData("{\"success\":false,\"msg\":\"密码错误。\"}");
return AJAX;
这样我们的 BaseAction 就完事了，
对象ToString 转成 json 格式了，方便查看
@Override
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
1 <interceptor-ref name="landingIct">
2 <!-- 包括的方法，也就是拦截器拦截的方法<param name="includeMethods">方法1，方法2</param>
3
4 excludeMethods表示排除指定的方法，即不对标记为excludeMethods的方法进行拦截
5 -->
6 <param name="excludeMethods">landing</param>
7 </interceptor-ref>
8 <!-- 默认拦截器栈，如果不写则通过默认拦截器完成的功能将失效。如：国际化等等详细查看struts-default -->
9 <!--
10 如果action中没有自定义的拦截器，struts2会为该action添加默认的拦截器，即defaultStack；如果action中用户自己添加了自定义拦截器，将覆盖掉系统的defaultStack，这时候需要我们显式调用该拦截器栈。
11 -->
抛出异常 处理，在beasAction设置 IsAjaxError AjaxErrorMessage
给get set 方法，
新建 AjaxExceptionInterceptor
public String intercept(ActionInvocation invocation)
throws Exception
{
String result;
try
{
result = invocation.invoke();
}
catch (Exception e) {
if (this.logEnabled) {
handleLogging(e);
} List exceptionMappings = invocation.getProxy().getConfig().getExceptionMappings();
String mappedResult = findResultFromExceptions(exceptionMappings, e);
if (mappedResult != null) {
result = mappedResult;
Object action = invocation.getAction();
if (action instanceof AjaxProvider) {
AjaxProvider ajaxAction = (AjaxProvider)action;
Map results = invocation.getProxy().getConfig().getResults();
ResultConfig resultConfig = (ResultConfig)results.get(result);
String location = (String)resultConfig.getParams().get("location"); ajaxAtion.setIsAjaxError ("true");
ajaxAction.setAjaxErrorMessage(location);
result = "ajaxError";
}
super.publishException(invocation, new ExceptionHolder(e));
}
else {
throw e;
}
} return result;
}
baseAction 这里判断下是否有异常，有的花转成json输出到页面
// if(true){
// String errorResultLocation = ajaxAction.getErrorResultLocation();
// String exceptionMessage =
// invocation.getStack().findString("exception.message");
// exceptionMessage = exceptionMessage.replaceAll("\r", " ");
// exceptionMessage = exceptionMessage.replaceAll("\n", " ");
// exceptionMessage = exceptionMessage.replaceAll("\t", " ");
// responseData = getFailureData(null, exceptionMessage);
// }