java程式碼物件如下：

package com.ctrip.market.messagepush.service.entity;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;

public class WaitSendModel {


    public long MsgID;

    public String GroupID;

    public int SendLevel;

    public int
 
 SendType;

    public long getMsgID() {
        return MsgID;
    }

    public void setMsgID(long msgID) {
        this.MsgID = msgID;
    }

    public String getGroupID() {
        return GroupID;
    }

    public void setGroupID(String groupID) {
        this.GroupID = groupID;
    }

    public
 
 int getSendLevel() {
        return SendLevel;
    }

    public void setSendLevel(int sendLevel) {
        this.SendLevel = sendLevel;
    }

    public int getSendType() {
        return SendType;
    }

    public void setSendType(int sendType) {
        this.SendType = sendType;
    }
}

執行結果，首字母小寫：

Json={"msgID":100005,"groupID":"00001","sendLevel":5}

以上的物件如果通過jackson轉成json格式的話，首字母會自動變成小寫，如果我想讓首字母變成大寫的，該如何處理呢？

在屬性上加@JsonProperty 註解，並且在對應的setter ，getter 上面加上@JsonIgnore，這樣就可以了，新增完之後的程式碼如下：

package com.ctrip.market.messagepush.service.entity;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;


public class WaitSendModel {

    @JsonProperty
    public long MsgID;


    @JsonProperty
    public String GroupID;


    @JsonProperty
    public int SendLevel;


    @JsonProperty
    public int SendType;

    @JsonIgnore
    public long getMsgID() {
        return MsgID;
    }

    @JsonIgnore
    public void setMsgID(long msgID) {
        this.MsgID = msgID;
    }
    @JsonIgnore
    public String getGroupID() {
        return GroupID;
    }
    @JsonIgnore
    public void setGroupID(String groupID) {
        this.GroupID = groupID;
    }
    @JsonIgnore
    public int getSendLevel() {
        return SendLevel;
    }
    @JsonIgnore
    public void setSendLevel(int sendLevel) {
        this.SendLevel = sendLevel;
    }
    @JsonIgnore
    public int getSendType() {
        return SendType;
    }
    @JsonIgnore
    public void setSendType(int sendType) {
        this.SendType = sendType;
    }
}

執行結果，首字母大寫：

Json={"MsgID":100005,"GroupID":"00001","SendLevel":5,"SendType":0}