自定义日期格式化，解决JSONObject.fromObject参数格式问题
发布时间：2020-12-16 18:43:22 所属栏目：百科 来源：网络整理
导读：package com.foresee.util;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.Locale;import net.sf.json.JSONArray;import net.sf.json.JSONNull;import net.sf.json.JsonConfig;import net.sf.json.p
package com.foresee.util;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import net.sf.json.JSONArray;
import net.sf.json.JSONNull;
import net.sf.json.JsonConfig;
import net.sf.json.processors.DefaultDefaultValueProcessor;
import net.sf.json.processors.JsonValueProcessor;
import net.sf.json.util.JSONUtils;
public class JsonDateValueProcessor implements JsonValueProcessor {
private String datePattern = "yyyy-MM-dd HH:mm:ss";// 日期格式
public JsonDateValueProcessor() {
super();
}
// 构造函数
public JsonDateValueProcessor(String format) {
super();
this.datePattern = format;
}
public Object processArrayValue(Object value,JsonConfig jsonConfig) {
return process(value);
}
public Object processObjectValue(String key,Object value,JsonConfig jsonConfig) {
return process(value);
}
private Object process(Object value) {
try {
if (value instanceof Date) {
SimpleDateFormat sdf = new SimpleDateFormat(datePattern,Locale.UK);
return sdf.format((Date) value);
}
// return value == null ? "" : value.toString();
return value;
} catch (Exception e) {
// return "";
return null;
}
}
public String getDatePattern() {
return datePattern;
}
public void setDatePattern(String datePaterns) {
this.datePattern = datePaterns;
}
}
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package com.foresee.util;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Locale;
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import net.sf.json.JSONArray;
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import net.sf.json.JSONNull;
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import net.sf.json.JsonConfig;
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import net.sf.json.processors.DefaultDefaultValueProcessor;
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import net.sf.json.processors.JsonValueProcessor;
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import net.sf.json.util.JSONUtils;
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public class JsonDateValueProcessor implements JsonValueProcessor {
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private String datePattern = "yyyy-MM-dd HH:mm:ss";// 日期格式
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public JsonDateValueProcessor() {
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super();
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}
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// 构造函数
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public JsonDateValueProcessor(String format) {
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super();
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this.datePattern = format;
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}
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public Object processArrayValue(Object value,JsonConfig jsonConfig) {
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return process(value);
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}
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public Object processObjectValue(String key,Object value,JsonConfig jsonConfig) {
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return process(value);
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}
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private Object process(Object value) {
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try {
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if (value instanceof Date) {
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SimpleDateFormat sdf = new SimpleDateFormat(datePattern,Locale.UK);
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return sdf.format((Date) value);
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}
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// return value == null ? "" : value.toString();
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return value;
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} catch (Exception e) {
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// return "";
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return null;
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}
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}
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public String getDatePattern() {
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return datePattern;
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}
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public void setDatePattern(String datePaterns) {
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this.datePattern = datePaterns;
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}
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}
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package com.foresee.util;
import java.util.Date;
public class User {
private Date date;
private Double num;
private Double age;
private String name;
private String password;
public Double getAge() {
return age;
}
public void setAge(Double age) {
this.age = age;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getNum() {
return num;
}
public void setNum(Double num) {
this.num = num;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public User(Date date) {
super();
this.date = date;
}
public User() {
super();
// TODO Auto-generated constructor stub
}
}
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package com.foresee.util;
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import java.util.Date;
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public class User {
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private Date date;
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private Double num;
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private Double age;
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private String name;
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private String password;
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public Double getAge() {
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return age;
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}
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public void setAge(Double age) {
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this.age = age;
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}
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public String getPassword() {
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return password;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Double getNum() {
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return num;
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}
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public void setNum(Double num) {
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this.num = num;
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}
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public Date getDate() {
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return date;
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}
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public void setDate(Date date) {
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this.date = date;
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}
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public User(Date date) {
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super();
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this.date = date;
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}
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public User() {
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super();
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// TODO Auto-generated constructor stub
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}
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}
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测试
public static void main(String[] args) {
ArrayList list = new ArrayList();
User user = new User();
user.setNum(new Double(0));
user.setName(null);
user.setAge(null);
user.setPassword("");
user.setDate(new Date());
list.add(user);
JsonConfig jsonConfig = new JsonConfig();
// 设置javabean中日期转换时的格式
jsonConfig.registerJsonValueProcessor(Date.class,new JsonDateValueProcessor("yyyy-MM-dd HH:mm:ss"));
jsonConfig.registerDefaultValueProcessor(Double.class,new DefaultDefaultValueProcessor(){
public Object getDefaultValue(Class type) {
return JSONNull.getInstance();
}
});
jsonConfig.registerDefaultValueProcessor(String.class,new DefaultDefaultValueProcessor(){
public Object getDefaultValue(Class type) {
return JSONNull.getInstance();
}
});
// 获取json数组
JSONArray jsonArray = JSONArray.fromObject(list,jsonConfig);
System.out.println(jsonArray.toString());
}
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public static void main(String[] args) {
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ArrayList list = new ArrayList();
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User user = new User();
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user.setNum(new Double(0));
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user.setName(null);
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user.setAge(null);
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user.setPassword("");
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user.setDate(new Date());
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list.add(user);
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JsonConfig jsonConfig = new JsonConfig();
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// 设置javabean中日期转换时的格式
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jsonConfig.registerJsonValueProcessor(Date.class,new JsonDateValueProcessor("yyyy-MM-dd HH:mm:ss"));
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jsonConfig.registerDefaultValueProcessor(Double.class,new DefaultDefaultValueProcessor(){
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public Object getDefaultValue(Class type) {
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? ? ?return JSONNull.getInstance();
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}
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});
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jsonConfig.registerDefaultValueProcessor(String.class,new DefaultDefaultValueProcessor(){
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public Object getDefaultValue(Class type) {
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return JSONNull.getInstance();
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}
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});
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// 获取json数组
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JSONArray jsonArray = JSONArray.fromObject(list,jsonConfig);
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System.out.println(jsonArray.toString());
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}
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