Question

struts2-json-plugin-2.3.8.jar怎么用

Answer 1

　　由于这是一个struts插件，所以必须要有struts才可以。
　　2、我的java文件：
　　StudentEntity.java
　　import java.io.Serializable;

public class StudentEntity implements Serializable {

private String stuName;
private String stuAge;
private String stuSex;
public String getStuAge() {
return stuAge;
}
public void setStuAge(String stuAge) {
this.stuAge = stuAge;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuSex() {
return stuSex;
}
public void setStuSex(String stuSex) {
this.stuSex = stuSex;
}

}

TeacherEntity.java
　　import java.io.Serializable;

public class TeacherEntity implements Serializable {

private String teacName;
private String teacAge;
private String teacSex;
public String getTeacAge() {
return teacAge;
}
public void setTeacAge(String teacAge) {
this.teacAge = teacAge;
}
public String getTeacName() {
return teacName;
}
public void setTeacName(String teacName) {
this.teacName = teacName;
}
public String getTeacSex() {
return teacSex;
}
public void setTeacSex(String teacSex) {
this.teacSex = teacSex;
}

}

　　StrIndex.java（这是一个action，命名不规范）
　　import java.util.Date;

import org.apache.struts2.json.annotations.JSON;

import com.opensymphony.xwork2.ActionSupport;

public class StrIndex extends ActionSupport {

private TeacherEntity teacher=new TeacherEntity();
private StudentEntity student=new StudentEntity();
private Date nowd=new Date();
public String toIndex(){
teacher.setTeacName("张三");
teacher.setTeacAge("100");
teacher.setTeacSex("男男");

student.setStuName("李老师");

return SUCCESS;
}
// 是否转换该对象
// @JSON(serialize=true)
// @JSON(name="newName")
public StudentEntity getStudent() {
return student;
}
public void setStudent(StudentEntity student) {
this.student = student;
}
public TeacherEntity getTeacher() {
return teacher;
}
public void setTeacher(TeacherEntity teacher) {
this.teacher = teacher;
}
@JSON(format="yyyy-MM-dd")
public Date getNowd() {
return nowd;
}
public void setNowd(Date nowd) {
this.nowd = nowd;
}

}

　　
　　紧接着是我的struts配置文件：
　　<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="test-default" extends="json-default">
<action name="ind" class="StrIndex" method="toIndex">
<result name="success" type="json">
</result>
</action>
</package>
</struts>

3、简单配置说明
　　在struts中使用 struts2-json-plugin-2.2.3.jar 需要将要返回json的action配置在
　　<package name="test-default" extends="json-default">
...
...
</package>

　　中，注意 extends="json-default"继承的是“json-default" 我们正常配置struts是使用‘struts-default’，所以需要将返回json的action和普通action分开使用两个package进行配置

　　<package name="test-default" extends="json-default">
...
...
</package>
<package name="struts-default" extends="struts-default">
...
...
</package>

　　在json package中的acton配置
　　<result name="success" type="json"></result>

　　便可以成功的转化json，结果如
　　
　　{"nowd":"2012-12-27T22:23:13","student":{"stuAge":null,"stuName":"李老师","stuSex":null},"teacher":{"teacAge":"100","teacName":"张三","teacSex":"男男"}}