使用gson将json解析为java对象 [英] Using gson to parse json to java object

问题描述

我想将一个json数据解析为一个java对象，然后将其发布到一个.jsp文件中，然后将其重新转换为一个json对象，以便将它放入一个javascript数组中。

以下是我想解析的数据的一个例子：

 LoanList= [{Loan ：One，Lat：35.65365，Lng：123.1331，Bal：4565，Address：Address 1，Delinquency：True）] $ b  

阅读后，我决定使用gson来解析数据：在​​阅读关于这个主题的其他问题之后，我写了两个班。

class1.java

  import java.util.ArrayList; 
 
 public class JSON1 {
 
 ArrayList< innerData> Loanlst; 
 
 
 public ArrayList< innerData> getLoanlst（）{
 return Loanlst; 
} 
 public void setLoanlst（ArrayList< innerData> Loanlst）{
 this.Loanlst = Loanlst; 
} 
} 
  

class2.java

  import java.math。 *; 
 
 public class innerData {
 public String loan; 
 public BigDecimal lat; 
 public BigDecimal lng; 
 public BigDecimal bal; 
 public String addrs; 
 public String delinq; 
 
 public String getLoan（）{
 return loan; 
} 
 
 public void setLoan（String loan）{
 this.loan = loan; 
} 
 
 public BigDecimal getLat（）{
 return lat; 
} 
 
 public void setLat（BigDecimal lat）{
 this.lat = lat; 
} 
 
 public BigDecimal getLng（）{
 return lng; 
} 
 
 public void setLng（BigDecimal lng）{
 this.lng = lng; 
} 
 
 public BigDecimal getBal（）{
 return bal; 
} 
 
 public void setBal（BigDecimal bal）{
 this.bal = bal; 
} 
 
 public String getAddrs（）{
 return addrs; 
} 
 
 public void setAddrs（String addrs）{
 this.addrs = addrs; 
} 
 
 
 public String getDelinq（）{
 return delinq; 
} 
 
 public void setDelinq（String delinq）{
 this.delinq = delinq; 
 
 
 $ / code $ / pre 
 
 
这里是我卡住的地方，我在哪里创建我的新Gson（）解析数据之前，我发送它？
解决方案
使用你的类，你应该能够做一些像：
  InnerData obj = new InnerData（...）; //填入数据
 Gson gson = new GSON（）; 
 
 //将java对象转换为JSON格式，
 //并返回为JSON格式的字符串
字符串json = gson.toJson（obj）; 
  
查看示例这里和 here 
提示：尝试创建一个主类来运行它分开。
 
I want to parse a json data into a java object, then post it to a .jsp to then turn it back into a json object so I can put it into a javascript array.

Here is an example of the data I want to parse: 
"LoanList" = [ {"Loan" : "One","Lat" : "35.65365", "Lng" : "123.1331" , "Bal" : "4565" ,  "Address" : "Address 1" , "Delinquency" : "True')]
After reading about it, I decided to use gson to parse the data: After reading other questions about this topic, I wrote two classes.

class1.java
import java.util.ArrayList;

public class JSON1 {

    ArrayList<innerData> Loanlst;


    public ArrayList<innerData> getLoanlst() {
        return Loanlst;
    }
    public void setLoanlst(ArrayList<innerData> Loanlst) {
        this.Loanlst = Loanlst;
    }
}
class2.java
import java.math.*;

public class innerData {
public String loan;
public BigDecimal lat;
public BigDecimal lng;
public BigDecimal bal;
public String addrs;
public String delinq;

public String getLoan() {
    return loan;
}

public void setLoan(String loan){
    this.loan = loan;
}

public BigDecimal getLat() {
    return lat;
}

public void setLat(BigDecimal lat){
    this.lat = lat;
}

public BigDecimal getLng() {
    return lng;
}

public void setLng(BigDecimal lng){
    this.lng = lng;
}

public BigDecimal getBal() {
    return bal;
}

public void setBal(BigDecimal bal){
    this.bal = bal;
}

public String getAddrs() {
    return addrs;
}

public void setAddrs(String addrs){
    this.addrs = addrs;
}


public String getDelinq() {
    return delinq;
}

public void setDelinq(String delinq){
    this.delinq = delinq;
}
}
Here is where I am stuck, Where do I create my new Gson() to parse the data before I send it?
解决方案
Using your class you should be able to do something like:
InnerData obj = new InnerData(...);//fill in with data
Gson gson = new Gson();

// convert java object to JSON format,
// and returned as JSON formatted string
String json = gson.toJson(obj);
check an example here and here

Tip: try creating a main class to run it separately.

                        
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