Struts2 ---- 返回 json 数据

灰太狼 2022-05-27 09:36 209阅读 0赞

还是好久以前写的，整理一下，简洁明了的给大家展示一波  
  
  
这边需要注意的就是 ：  
类上面的注释：@ParentPackage(“json-default”)  
方法上面的注释：@Result

package com.test.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    import com.test.entity.Dept;
    import com.test.entity.Emp;
    import org.apache.struts2.convention.annotation.Action;
    import org.apache.struts2.convention.annotation.Namespace;
    import org.apache.struts2.convention.annotation.ParentPackage;
    import org.apache.struts2.convention.annotation.Result;
    
    /** * @author Ming * @date 2017/11/16 12:46 */
    @ParentPackage("json-default")
    @Namespace("/test")
    public class test extends ActionSupport { 
    
    // Emp 和 Dept 只是两个实体类
        private Emp emp;
    // Dept 的定义只是为了测试test()方法的 params 标签 : ,params = { "root","emp"}
        private Dept dept;
    
    
    
        @Action(value = "test", results = {
                @Result(name = "success", type = "json", params = {
    // emp，不然我们定义的private的属性都会返回
                        "root","emp"
                })
        })
        public String test() {
            dept = new Dept();
            dept.setDeptno(7934);
            dept.setDname("sale");
    
            emp = new Emp();
            emp.setEmpno(7934);
            emp.setEname("cat");
            emp.setJob("clerk");
            emp.setDeptByDeptno(dept);
            return SUCCESS;
        }
    
        public Emp getEmp() {
            return emp;
        }
    
        public void setEmp(Emp emp) {
            this.emp = emp;
        }
    
        public Dept getDept() {
            return dept;
        }
    
        public void setDept(Dept dept) {
            this.dept = dept;
        }
    }

<%-- Created by IntelliJ IDEA. User: Ming Date: 2017/11/16 Time: 12:52 To change this template use File | Settings | File Templates. --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    
    <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
    
    <html>
    <head>
        <base href="<%=basePath%>">
        <title>Title</title>
        <script src="js/jquery.min.js"></script>
    
    </head>
    <body>
    
    </body>
    <script> $.get("test/test.action", {}, function (result) { alert(result.ename); alert(result.deptByDeptno.deptno); }, "json") </script>
    </html>

这个就是我们返回的json数据，  
![这里写图片描述][SouthEast]

如果不定义 , params = \{“root”,”emp”\} ,那么我们定义的两个属性就都返回了  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220527/bfbb87ed323346f78be67b32b3820f97.png
[SouthEast 1]: /images/20220527/2457d30865474287918719919e8a3096.png