在Struts 2中从Java获取JSON对象
我试图使用getJSON jQuery方法从java服务器获取响应文本。 虽然，当java类是简单格式（ String ， List和Map ）时，我可以得到响应数据，但是在使用其他java对象时我无法获得成功数据。
以下Java类是简单类型并获取访问成功数据和工作
package com.awitd.framework.action; import com.opensymphony.xwork2.Action; public class getAllJson implements Action{ private String data; public String getData() { return data; } public void setData(String data) { this.data = data; } public String execute() { System.out.println(" this is from action"); data = "["; data += "{"; data += "\"objid\":\"" + "1" + "\","; data += "\"id\":\"" + "1" + "\",\"name\":\"" + "name" + "\""; data += "}"; System.out.println("data " + data); data += "]"; return SUCCESS; } }
以下java类正在使用其他java对象，并且不返回成功数据
package com.awitd.framework.action; import java.util.List; import com.opensymphony.xwork2.Action; import com.awitd.framework.entity.Employee; import com.awitd.framework.entity.Profile; import com.awitd.framework.service.EmployeeService; public class getAllJson implements Action{ private String data; private EmployeeService employeeService; private List employeeList; private Employee employee; private Profile profile; public String getData() { return data; } public void setData(String data) { this.data = data; } public EmployeeService getEmployeeService() { return employeeService; } public void setEmployeeService(EmployeeService employeeService) { this.employeeService = employeeService; } public String execute() { System.out.println(" this is from action"); data = "["; /*data += "{"; data += "\"objid\":\"" + "1" + "\","; data += "\"id\":\"" + "1" + "\",\"name\":\"" + "name" + "\""; data += "}"; System.out.println("data " + data);*/ employeeList = employeeService.getAll(); System.out.println("size........"+employeeList.size()); if (!employeeList.isEmpty()) { for (int i=0; i<employeeList.size(); i++) { employee = employeeList.get(i); profile = employee.getProfile(); data += "{"; data += "\"objid\":\"" + employee.getEmployeeId() + "\","; data += "\"id\":\"" + employee.getId() + "\",\"name\":\"" + employee.getName() + "\""; data += ",\"dob\":\"" + profile.getDob() + "\",\"sex\":\"" + profile.getSex() + "\""; data += ",\"email\":\"" + profile.getEmail() + "\",\"workstart\":\"" + profile.getWorkstart() + "\""; data += ",\"study\":\"" + profile.getStudySub() + "\",\"jplevel\":\"" + profile.getJpLevel() + "\""; data += ",\"jpgroup\":\"" + profile.getJpGroup() + "\",\"remark\":\"" + profile.getRemark() + "\""; data += "}"; if (!(i==employeeList.size()-1)) data += ","; } } data += "]"; return SUCCESS; } }
得到了这个错误：
No existing transaction found for transaction marked with propagation 'mandatory' java.lang.reflect.InvocationTargetException org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: java.lang.reflect.InvocationTargetException org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:246) org.apache.struts2.json.JSONWriter.processCustom(JSONWriter.java:178) org.apache.struts2.json.JSONWriter.process(JSONWriter.java:168) org.apache.struts2.json.JSONWriter.value(JSONWriter.java:134) org.apache.struts2.json.JSONWriter.write(JSONWriter.java:102) org.apache.struts2.json.JSONUtil.serialize(JSONUtil.java:116) org.apache.struts2.json.JSONResult.createJSONString(JSONResult.java:196) org.apache.struts2.json.JSONResult.execute(JSONResult.java:170) com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:367) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:271)
尝试以下代码，它应该修复错误
data += "{"; data += "\"objid\":\"" + employee.getEmployeeId() + "\","; data += "\"id\":\"" + employee.getId() + "\",\"name\":\"" + employee.getName() + "\","; data += ",\"dob\":\"" + profile.getDob() + "\",\"sex\":\"" + profile.getSex() + "\","; data += ",\"email\":\"" + profile.getEmail() + "\",\"workstart\":\"" + profile.getWorkstart() + "\","; data += ",\"study\":\"" + profile.getStudySub() + "\",\"jplevel\":\"" + profile.getJpLevel() + "\","; data += ",\"jpgroup\":\"" + profile.getJpGroup() + "\",\"remark\":\"" + profile.getRemark() + "\""; data += "}";