java对象与json对象的转换.docx

转：JSON与JAVA数据的转换 JSON-lib这个Java类包用于把bean,map和XML转换成JSON并能够把JSON转回成bean和DynaBean。 下载地址:/ 还要需要的第3方包: mons(3.2以上版本) org.apache.oro net.sf.ezmorph(ezmorph-1.0.4.jar) nu.xom 1、List Java代码1. boolean boolArray = new booleantrue,false,true; 2. JSONArray jsonArray1 = JSONArray.fromObject( boolArray ); 3. System.out.println( jsonArray1 ); 4. / prints true,false,true 5.6. List list = new ArrayList(); 7. list.add( first ); 8. list.add( second ); 9. JSONArray jsonArray2 = JSONArray.fromObject( list ); 10. System.out.println( jsonArray2 ); 11. / prints first,second 12.13. JSONArray jsonArray3 = JSONArray.fromObject( json,is,easy ); 14. System.out.println( jsonArray3 ); 15. / prints json,is,easy boolean boolArray = new booleantrue,false,true;JSONArray jsonArray1 = JSONArray.fromObject( boolArray );System.out.println( jsonArray1 );/ prints true,false,trueList list = new ArrayList();list.add( first );list.add( second );JSONArray jsonArray2 = JSONArray.fromObject( list );System.out.println( jsonArray2 );/ prints first,secondJSONArray jsonArray3 = JSONArray.fromObject( json,is,easy );System.out.println( jsonArray3 );/ prints json,is,easy2、Map Java代码1. Map map = new HashMap(); 2. map.put( name, json ); 3. map.put( bool, Boolean.TRUE ); 4.5. map.put( int, new Integer(1) ); 6. map.put( arr, new Stringa,b ); 7. map.put( func, function(i) return this.arri; ); 8. JSONObject json = JSONObject.fromObject( map ); 9. System.out.println( json ); 10. /func:function(i) return this.arri; ,arr:a,b,int:1,name:json,bool:true Map map = new HashMap();map.put( name, json );map.put( bool, Boolean.TRUE );map.put( int, new Integer(1) );map.put( arr, new Stringa,b );map.put( func, function(i) return this.arri; );JSONObject json = JSONObject.fromObject( map );System.out.println( json );/func:function(i) return this.arri; ,arr:a,b,int:1,name:json,bool:true3、BEAN Java代码1. /* 2. * Bean.java 3. private String name = json; 4. private int pojoId = 1; 5. private char options = new chara,f; 6. private String func1 = function(i) return this.optionsi; ; 7. private JSONFunction func2 = new JSONFunction(new Stringi,return this.optionsi;); 8. */ 9. JSONObject jsonObject = JSONObject.fromObject( new JsonBean() ); 10. System.out.println( jsonObject ); 11. /func1:function(i) return this.optionsi; ,pojoId:1,name:json,options:a,f,func2:function(i) return this.optionsi; /* Bean.javaprivate String name = json;private int pojoId = 1;private char options = new chara,f;private String func1 = function(i) return this.optionsi; ;private JSONFunction func2 = new JSONFunction(new Stringi,return this.optionsi;);*/JSONObject jsonObject = JSONObject.fromObject( new JsonBean() );System.out.println( jsonObject );/func1:function(i) return this.optionsi; ,pojoId:1,name:json,options:a,f,func2:function(i) return this.optionsi; 4、BEANS Java代码1. /* 2. * private int row ; 3. private int col ; 4. private String value ; 5. * 6. */ 7. List list = new ArrayList(); 8. JsonBean2 jb1 = new JsonBean2(); 9. jb1.setCol(1); 10. jb1.setRow(1); 11. jb1.setValue(xx); 12.13. JsonBean2 jb2 = new JsonBean2(); 14. jb2.setCol(2); 15. jb2.setRow(2); 16. jb2.setValue(); 17.18.19. list.add(jb1); 20. list.add(jb2); 21.22. JSONArray ja = JSONArray.fromObject(list); 23. System.out.println( ja.toString() ); 24. /value:xx,row:1,col:1,value:,row:2,col:2 /* private int row ;private int col ;private String value ;*/List list = new ArrayList();JsonBean2 jb1 = new JsonBean2();jb1.setCol(1);jb1.setRow(1);jb1.setValue(xx);JsonBean2 jb2 = new JsonBean2();jb2.setCol(2);jb2.setRow(2);jb2.setValue();list.add(jb1);list.add(jb2);JSONArray ja = JSONArray.fromObject(list);System.out.println( ja.toString() );/value:xx,row:1,col:1,value:,row:2,col:25、String to bean Java代码1. String json = name=json,bool:true,int:1,double:2.2,func:function(a) return a; ,array:1,2; 2. JSONObject jsonObject = JSONObject.fromString(json); 3. Object bean = JSONObject.toBean( jsonObject ); 4. assertEquals( jsonObject.get( name ), PropertyUtils.getProperty( bean, name ) ); 5. assertEquals( jsonObject.get( bool ), PropertyUtils.getProperty( bean, bool ) ); 6. assertEquals( jsonObject.get( int ), PropertyUtils.getProperty( bean, int ) ); 7. assertEquals( jsonObject.get( double ), PropertyUtils.getProperty( bean, double ) ); 8. assertEquals( jsonObject.get( func ), PropertyUtils.getProperty( bean, func ) ); 9. List expected = JSONArray.toList( jsonObject.getJSONArray( array ) ); 10. assertEquals( expected, (List) PropertyUtils.getProperty( bean, array ) ); String json = name=json,bool:true,int:1,double:2.2,func:function(a) return a; ,array:1,2;JSONObject jsonObject = JSONObject.fromString(json);Object bean = JSONObject.toBean( jsonObject );assertEquals( jsonObject.get( name ), PropertyUtils.getProperty( bean, name ) );assertEquals( jsonObject.get( bool ), PropertyUtils.getProperty( bean, bool ) );assertEquals( jsonObject.get( int ), PropertyUtils.getProperty( bean, int ) );assertEquals( jsonObject.get( double ), PropertyUtils.getProperty( bean, double ) );assertEquals( jsonObject.get( func ), PropertyUtils.getProperty( bean, func ) );List expected = JSONArray.toList( jsonObject.getJSONArray( array ) );assertEquals( expected, (List) PropertyUtils.getProperty( bean, array ) );Java代码1. String json = value:xx,row:1,col:1; 2. JSONObject jsonObject = JSONObject.fromString(json); 3. JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class ); 4. assertEquals( jsonObject.get( col ),new Integer( bean.getCol() ); 5. assertEquals( jsonObject.get( row ), new Integer( bean.getRow() ) ); 6. assertEquals( jsonObject.get( value ), bean.getValue() ); String json = value:xx,row:1,col:1;JSONObject jsonObject = JSONObject.fromString(json);JsonBean2 bean = (JsonBean2) JSONObject.toBean( jsonObject, JsonBean2.class );assertEquals( jsonObject.get( col ),new Integer