Ajax提交Struts2表單(服務器端validation校驗出錯提示)

1.目標

在基於Struts2的應用中，利用AJAX方式提交表單實現一個登陸驗證Action，將服務器端驗證結果展現在頁面上

字段錯誤展示：

action 錯誤提示

2.技術實現

利用struts2-jquery插件和struts2-json插件實現
3.實現步驟

3.1依賴jar包

除了struts2-core-2.2.3.jar包以外，還要下載兩個jar包

struts2-jquery-plugin-3.1.0.jar

struts2-json-plugin-2.2.3.jar

3.2編寫登陸處理類Action

這個Action和我們普通的Action沒有任何區別

[java]

1. package com.crazycoder2010.struts2;
3. import com.opensymphony.xwork2.ActionSupport;
5. public class LoginAction extends ActionSupport {
6. private static final long serialVersionUID = 6627313805146336838L;
7. private String name;
8. private String password;
9. public String getName() {
10. return name;
11. }
12. public void setName(String name) {
13. this.name = name;
14. }
15. public String getPassword() {
16. return password;
17. }
18. public void setPassword(String password) {
19. this.password = password;
20. }
21. @Override
22. public String execute() throws Exception {
23. if(!("Kevin".equals(this.name)&&"111111".equals(this.password))){
24. this.addActionError("Wrong!");
25. }
26. return INPUT;
27. }
28. }

[html]

1. <?xml version="1.0" encoding="UTF-8" ?>
2. <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
3. <validators>
4. <field name="name">
5. <field-validator type="requiredstring">
6. <param name="trim">true</param>
7. <message>Name is required.</message>
8. </field-validator>
9. <field-validator type="stringlength">
10. <param name="minLength">2</param>
11. <param name="maxLength">60</param>
12. <message>Name must be between ${minLength} and ${maxLength} characters long.</message>
13. </field-validator>
14. </field>
15. <field name="password">
16. <field-validator type="requiredstring">
17. <param name="trim">true</param>
18. <message>Password is required.</message>
19. </field-validator>
20. <field-validator type="stringlength">
21. <param name="minLength">2</param>
22. <param name="maxLength">60</param>
23. <message>Password must be between ${minLength} and ${maxLength} characters long.</message>
24. </field-validator>
25. </field>
26. </validators>