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[JAVA]用Java实现的各种排序

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用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 #KvlYZ+1  
插入排序: cU  
{_*yGK48n  
package org.rut.util.algorithm.support; CTmT@A{  
|Y.?_lC  
import org.rut.util.algorithm.SortUtil; :Zlwy-[  
/** 0=$T\(0g  
* @author treeroot 'Pbr v  
* @since 2006-2-2 #5uOx(>  
* @version 1.0 uXiN~j &Be  
*/ #O&8A  
public class InsertSort implements SortUtil.Sort{ uQzXfOq  
/x *3}oI  
/* (non-Javadoc) \w8\1~#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7d\QB (~  
*/ * v#o  
public void sort(int[] data) { rvM{M/4  
int temp; nJ;.Td  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); m4Zk\,1m.|  
} -nwypu  
} F"mmLao  
} lEBLZ}}\  
|uJ%5y#  
} !()Qm,1u  
;9#KeA _  
冒泡排序: J .<F"r>  
|V(0GB  
package org.rut.util.algorithm.support; yt2PU_),  
6L~n.5B~o  
import org.rut.util.algorithm.SortUtil; E?@m?@*/  
CvdN"k  
/** : rVnc =k  
* @author treeroot cz$2R  
* @since 2006-2-2 T u'{&  
* @version 1.0 :23P!^Y  
*/ !5N.B|N t  
public class BubbleSort implements SortUtil.Sort{ 5lum$5  
|':{lH6+1  
/* (non-Javadoc) Y4YJJYvD  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .RL=xb|[  
*/ {4PwLCy  
public void sort(int[] data) { 9tnD=A<PS  
int temp; !n%j)`0M  
for(int i=0;i for(int j=data.length-1;j>i;j--){ nr3==21Om4  
if(data[j] SortUtil.swap(data,j,j-1); z@j8lv2j1  
} H,NF;QPPC  
} rT>wg1:  
} Alq(QDs  
} qxj(p o  
jb)ZLA;L_c  
} *NQ/UXE  
V.2_i*  
选择排序: e}W)LPR!  
phz&zl D  
package org.rut.util.algorithm.support; FGkVqZ Y2?  
|l!aB(NW  
import org.rut.util.algorithm.SortUtil; 7[wPn`v2  
dF2RH)Ud  
/** D/' dTrR  
* @author treeroot Qg/rRiV  
* @since 2006-2-2 4Po_-4  
* @version 1.0 C9;kpqNG#u  
*/ c*M} N?|6  
public class SelectionSort implements SortUtil.Sort { ##ANrG l  
@%SQFu@FJ  
/* t$ *0{w E  
* (non-Javadoc) @o.I;}*N  
* !_(Tqyg&  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W{aY}`  
*/ A%-6`>  
public void sort(int[] data) { Qwc"[N4H  
int temp; ?h2}#wg  
for (int i = 0; i < data.length; i++) { 8;X-)&R  
int lowIndex = i; y+q5UC|  
for (int j = data.length - 1; j > i; j--) { WEpoBP CL  
if (data[j] < data[lowIndex]) { )`}:8y?  
lowIndex = j; aQ~s`^D  
} xN(|A}w  
} wA.\i  
SortUtil.swap(data,i,lowIndex); MO]&bHH7;  
} y?# Loe  
} dqAw5[qMJ  
h `wD  
} B erwI 7!=  
l;V173W=&  
Shell排序: tMe~vq[  
L0]_X#s>#  
package org.rut.util.algorithm.support; 1 {)Q[#l  
<-0]i_4sK  
import org.rut.util.algorithm.SortUtil; azU"G(6y?+  
Y^]rMK/;  
/** O H7FkR  
* @author treeroot .p$(ZH =~  
* @since 2006-2-2 2TuU2 f.  
* @version 1.0 y> (w\K9W  
*/ xLn%hxm?,  
public class ShellSort implements SortUtil.Sort{ H[|~/0?K  
?1".;foZ  
/* (non-Javadoc) Dhv3jg;lq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /7LR;>Bj  
*/ -^wl>}#*T3  
public void sort(int[] data) { uIrG*K  
for(int i=data.length/2;i>2;i/=2){ |&jXp%4T  
for(int j=0;j insertSort(data,j,i); },[}$m %  
} YoE3<[KD(  
} ]R? 4{t4  
insertSort(data,0,1); 8EEuv-aeo  
} F5#YOck&,  
H:\k}*w  
/** "h ^Z  
* @param data )CyS#j#=  
* @param j 2BobH_ H  
* @param i F<w/PMb  
*/ ZG@q`<:j  
private void insertSort(int[] data, int start, int inc) { MY/}-* |  
int temp;  LIdF 0  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); h1(4Ic  
} Np)lIGE  
} :i7;w%B  
} =qIyqbXz  
)_NO4`ejs/  
} cS+>J@L  
Vq2$'lY  
快速排序: P }uOJVQ_  
-%dCw6aX+  
package org.rut.util.algorithm.support; u2[w#   
A(0lM`X  
import org.rut.util.algorithm.SortUtil; fn!KQ`,#  
4`R(?  
/** ]cruF#`%  
* @author treeroot %%wNZ{  
* @since 2006-2-2 M@ZI\  
* @version 1.0 KG5>]_GH  
*/ ]s748+  
public class QuickSort implements SortUtil.Sort{ lHIM}~#;nd  
9k=3u;$v  
/* (non-Javadoc) bu"!jHPB  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a'z7(8$$  
*/ &VcV$8k  
public void sort(int[] data) { 1i ] ^{;]  
quickSort(data,0,data.length-1); FCn_^l)EA  
} Tb-F]lg$  
private void quickSort(int[] data,int i,int j){ .}*" Nv  
int pivotIndex=(i+j)/2; UY 2OZ& &  
file://swap 2Hv+W-6v  
SortUtil.swap(data,pivotIndex,j); yiI1x*^  
>"<Wjr8W!$  
int k=partition(data,i-1,j,data[j]); 3yXY.>'  
SortUtil.swap(data,k,j); EZ`{Wnbq  
if((k-i)>1) quickSort(data,i,k-1);  RX5dO%  
if((j-k)>1) quickSort(data,k+1,j); s|ITsz0,td  
b_):MQ1{  
} xP,hTE  
/** a@*\o+Su  
* @param data .GcKa024  
* @param i as_PoCoss  
* @param j C6y&#uX\  
* @return eR"<33{  
*/ ;({W#Wa  
private int partition(int[] data, int l, int r,int pivot) { NgCvVWto  
do{ @ry_nKr9  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ]g&TKm  
SortUtil.swap(data,l,r); y^%y<~f  
} AzxXB  
while(l SortUtil.swap(data,l,r); ofv)SCjd  
return l; tnG# IU *  
} pHJ3nHLQ  
E@3aI Axh  
} #C3.Jef  
l/awS!Q/nF  
改进后的快速排序: O8.5}>gDn.  
i7>tU=  
package org.rut.util.algorithm.support; &`XVq" 7  
?K\axf>F  
import org.rut.util.algorithm.SortUtil; @y&bw9\  
t<viX's  
/** }Z,x~G  
* @author treeroot IB7E}56l  
* @since 2006-2-2 # Vha7  
* @version 1.0 Qz N&>sk"  
*/ E\,-XH  
public class ImprovedQuickSort implements SortUtil.Sort { 1y4  
^`>/.gL  
private static int MAX_STACK_SIZE=4096; 0_t`%l=  
private static int THRESHOLD=10; 8*T=Xei8  
/* (non-Javadoc) E+w<RNBmz  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `^y7f  
*/ n=ux5M  
public void sort(int[] data) { 5[u]E~Fl}  
int[] stack=new int[MAX_STACK_SIZE]; xUistwq  
bbyg8;/  
int top=-1; u-5{U-^_  
int pivot; (=@h23 vH  
int pivotIndex,l,r; ,nB5/Lx  
#ucBo<[  
stack[++top]=0; H DFOA  
stack[++top]=data.length-1; N' `A?&2ru  
3jC_AO%T  
while(top>0){ 7x4PaX(  
int j=stack[top--]; qm o9G  
int i=stack[top--]; sp*v?5lW  
#?9;uy<j.q  
pivotIndex=(i+j)/2; 1PV'?tXp(  
pivot=data[pivotIndex]; \)?HJ  
"!%l/_p?  
SortUtil.swap(data,pivotIndex,j); %F4%H|G  
`lt"[K<  
file://partition Gk /fBs  
l=i-1; X(-4<B  
r=j; ~O &:C{9=  
do{ )/?$3h;  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ?m? ::RH  
SortUtil.swap(data,l,r); V% 6I\G2/:  
} ={wcfhUl+  
while(l SortUtil.swap(data,l,r); 8eHyL  
SortUtil.swap(data,l,j); <?4V  
}d}Ke_Q0  
if((l-i)>THRESHOLD){ exUu7& *:  
stack[++top]=i; $@"g^,n  
stack[++top]=l-1; ^RtIh-Z.9  
} RuVGG)  
if((j-l)>THRESHOLD){ <3C*Z"aQ>|  
stack[++top]=l+1; |2n4QBH!  
stack[++top]=j; Y\?"WGL)p  
} >e[i5  
(jl D+Y_  
} <;Zmjeb+#  
file://new InsertSort().sort(data); cP_.&!T  
insertSort(data); JHTSUq  
} o="M  
/** -fHy-Oh  
* @param data 8&`LYdzt  
*/ J,y[[CdH`  
private void insertSort(int[] data) { =.]4;z  
int temp; SmSH2m-  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); U/l&tmIVY  
} 6.nCV 0xA  
} s{\8om '-  
} <+vw@M  
+Kbjzh3<wG  
} _C[q4?  
F%D.zvKN  
归并排序: 9H`XeQ.  
wHMX=N1/  
package org.rut.util.algorithm.support; '=8d?aeF  
MXNFlP  
import org.rut.util.algorithm.SortUtil; xH"/1g  
"8jf81V*  
/** 7/@TF/V  
* @author treeroot ieCEo|b  
* @since 2006-2-2 qL3;}R  
* @version 1.0 0Y{yKL  
*/ qwgPk9l  
public class MergeSort implements SortUtil.Sort{ CxOob1@  
dufu|BL|}  
/* (non-Javadoc) Ata:^qI  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :hk5 .[  
*/ %oa-WmWm  
public void sort(int[] data) { 3>`mI8 $t  
int[] temp=new int[data.length]; W_(j3pV?Ml  
mergeSort(data,temp,0,data.length-1); E GU 0)<  
} X296tA>C`  
9BBmw(M}  
private void mergeSort(int[] data,int[] temp,int l,int r){ 0 e ~JMUb  
int mid=(l+r)/2; Z!zF\<r  
if(l==r) return ; 3/e.38m|  
mergeSort(data,temp,l,mid); EPM-df!=  
mergeSort(data,temp,mid+1,r); -Xm'dwm  
for(int i=l;i<=r;i++){ RF4vtQC=  
temp=data; ;1O_M9  
} tKx~1-  
int i1=l; jrr*!^4|  
int i2=mid+1; Mhf5bN|wQ  
for(int cur=l;cur<=r;cur++){ &n}f?  
if(i1==mid+1) qCpp6~]Um  
data[cur]=temp[i2++]; }1i`6`y1  
else if(i2>r) VfC<WVYiZ  
data[cur]=temp[i1++]; &zeyE;/Hj  
else if(temp[i1] data[cur]=temp[i1++]; O6a<`]F  
else _w+:Dv~*a  
data[cur]=temp[i2++]; ?u=Fj_N_  
} j8{i#;s!"  
} qqr?!vem6  
f:|1_j  
} 6J6BF%  
J76kkW`5  
改进后的归并排序: QIvVcfM^  
4n g]\ituS  
package org.rut.util.algorithm.support; JZ*/,|1}EC  
BmMGx8P  
import org.rut.util.algorithm.SortUtil; 6x[}g  
A_ N;   
/** FvXZ<(A{  
* @author treeroot \[_t]'p  
* @since 2006-2-2 a /l)qB#  
* @version 1.0 {9;CNsd  
*/ >#~& -3  
public class ImprovedMergeSort implements SortUtil.Sort { >j(_[z|v3  
cr?Q[8%t1  
private static final int THRESHOLD = 10; BsqP?/  
,nLy4T&"  
/* q#ClnG*  
* (non-Javadoc) Ou!2 [oe@M  
* bvr^zH,C  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xH(lm2kvT  
*/ 9_rYBX  
public void sort(int[] data) { #TX/aKr:  
int[] temp=new int[data.length]; E+R1 !.  
mergeSort(data,temp,0,data.length-1); mD0f<gJ1  
} m=A(NKZ   
m}aB?+i  
private void mergeSort(int[] data, int[] temp, int l, int r) { .4M.y:F  
int i, j, k; tI TS1  
int mid = (l + r) / 2; RJ ||}5  
if (l == r) aS{n8P6vW  
return; ;I 9&]   
if ((mid - l) >= THRESHOLD) 6YLj^w] %  
mergeSort(data, temp, l, mid); 5k3b3&  
else !&ayYu##{  
insertSort(data, l, mid - l + 1); nE&@Q  
if ((r - mid) > THRESHOLD) >:S?Mnv6  
mergeSort(data, temp, mid + 1, r); ZaDyg"Tw+  
else # 448-8x  
insertSort(data, mid + 1, r - mid); C]eSizS.  
'}JhzKNj  
for (i = l; i <= mid; i++) { X!Mx5fg  
temp = data; B=yqW  
} K{cD+=]{  
for (j = 1; j <= r - mid; j++) { DV+xg3\(>1  
temp[r - j + 1] = data[j + mid]; t?ZI".>  
} +xSHL|:b  
int a = temp[l]; ^aMg/.j  
int b = temp[r]; g\(G\ tnu>  
for (i = l, j = r, k = l; k <= r; k++) { )}]g] g  
if (a < b) { DiScFx |rE  
data[k] = temp[i++]; 3yY}04[9<  
a = temp; (G u zN  
} else { nntuLuW  
data[k] = temp[j--]; 2*< nu><b  
b = temp[j]; w%VU/6~  
} HU }7zK2  
} C:* *;=.  
} YTX,cj#D^&  
i]y<|W)Q3  
/** :O?MSS;~  
* @param data FLCexlv^  
* @param l \H~T>j{N  
* @param i axRV:w;E<  
*/ FQ2  
private void insertSort(int[] data, int start, int len) { a %'the  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _AYK435>N  
} TJpD{p}  
} V _/%b)*  
} el<s8:lA  
} B5VKs,g  
ygS;$2m%2  
堆排序: y$F'(b| )  
AGO+p(6d=g  
package org.rut.util.algorithm.support; Ae^~Cz1qz  
3!Ij;$  
import org.rut.util.algorithm.SortUtil; tr3! d_  
?|C2*?hZ+  
/** %lx!. G  
* @author treeroot @* jz o  
* @since 2006-2-2 e&F8m%t  
* @version 1.0 "a>q`RaIQ"  
*/ 5 +YH.4R  
public class HeapSort implements SortUtil.Sort{ ]^n7  
N1S{suic  
/* (non-Javadoc) {G0T$,'DR  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oo8VeRZ  
*/ &yTqZ*Yuk  
public void sort(int[] data) { +z\^t_"f  
MaxHeap h=new MaxHeap(); 9y8&9<#  
h.init(data); S6M}WR^,  
for(int i=0;i h.remove(); +nhLIO{{L  
System.arraycopy(h.queue,1,data,0,data.length); Mj?`j_X  
} /-qNh >v4  
:&rt)/I  
private static class MaxHeap{ k&q;JyUi  
kT66;Y[  
void init(int[] data){ B =T'5&  
this.queue=new int[data.length+1]; nH'e?>x~e  
for(int i=0;i queue[++size]=data; Z1f8/?`W  
fixUp(size); D~fl JR  
} cJ n=  
} sPQQ"|wU  
) 0W{]2  
private int size=0; xJvmhN/c  
L>NL:68yN  
private int[] queue; |A9F\A->4  
"]x'PI 4J  
public int get() { 5iw<>9X*  
return queue[1]; fLD, 5SN  
} ~i{(<.he  
 c(E{6g?  
public void remove() { v2\FA(BPn  
SortUtil.swap(queue,1,size--); )Y0!~# `  
fixDown(1); (ejvF):|  
} &|ex`nwc0  
file://fixdown rgv?gaQ>  
private void fixDown(int k) { l -mfFN  
int j; w"|L:8  
while ((j = k << 1) <= size) { 1..+F0U  
if (j < size %26amp;%26amp; queue[j] j++; a=1@*ID  
if (queue[k]>queue[j]) file://不用交换 o]_dJB  
break; q=m'^ ,gPS  
SortUtil.swap(queue,j,k); oj<gD  
k = j; $am$ EU?s  
} t!X. |`h  
} :zbQD8jv  
private void fixUp(int k) { Hqx-~hQO  
while (k > 1) { KYhwOGN  
int j = k >> 1; b<ZIWfs  
if (queue[j]>queue[k]) 9(7-{,c  
break; '<xXK@=KEI  
SortUtil.swap(queue,j,k); "ycJ:Xv49  
k = j; P%VSAh\|n  
} ({)+3]x  
} mb3"U"ohs  
4Uo&d#o)C-  
} 7`Ak) F:V  
*W1dG#Np}  
} 6OIte -c  
eA?RK.e  
SortUtil: I)[DTCJ~  
aCj&O:]=  
package org.rut.util.algorithm; :#ik. D  
nEy&>z  
import org.rut.util.algorithm.support.BubbleSort; ,HV(l+k {|  
import org.rut.util.algorithm.support.HeapSort; 5`  ~JPt  
import org.rut.util.algorithm.support.ImprovedMergeSort; IdYt\^@>  
import org.rut.util.algorithm.support.ImprovedQuickSort; RJ&RTo  
import org.rut.util.algorithm.support.InsertSort; xn(kKB.  
import org.rut.util.algorithm.support.MergeSort; ?4&e;83_#y  
import org.rut.util.algorithm.support.QuickSort; vWv"  
import org.rut.util.algorithm.support.SelectionSort; rfJz8uF%  
import org.rut.util.algorithm.support.ShellSort; $6 9&O  
 . iI  
/** XFpjYwn  
* @author treeroot {9pZ)tB  
* @since 2006-2-2 [kB7@o  
* @version 1.0 UHkMn  
*/ N!=v4f  
public class SortUtil { Lv7(st%`  
public final static int INSERT = 1; pa3{8x{9m  
public final static int BUBBLE = 2; QO~P7r|A  
public final static int SELECTION = 3; uyWunpT  
public final static int SHELL = 4; 2- h{N  
public final static int QUICK = 5; q:0N<$63  
public final static int IMPROVED_QUICK = 6; p38-l'{#  
public final static int MERGE = 7; *n ]GsOOn  
public final static int IMPROVED_MERGE = 8; q~o<*W   
public final static int HEAP = 9; &`r-.&Y  
m? }6)\ob  
public static void sort(int[] data) { p27~>xQ  
sort(data, IMPROVED_QUICK); P|E| $)m  
} rJ4S%6w  
private static String[] name={ FVbb2Y?R  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f~R(D0@  
}; /-'}q=M  
%)1?TU  
private static Sort[] impl=new Sort[]{ ;[YG@-"XZ  
new InsertSort(), fU}ub2_in  
new BubbleSort(), "+nRGEs6  
new SelectionSort(), cwlRQzQ(  
new ShellSort(),  4e7-0}0  
new QuickSort(), s 5Qcl;}  
new ImprovedQuickSort(), 4E+e}\r:6  
new MergeSort(), bsli0FJSh'  
new ImprovedMergeSort(), JFmC\  
new HeapSort() pYEMmZ?L  
};  7xlkZF  
X`K<>0.N  
public static String toString(int algorithm){ lrE5^;/s1  
return name[algorithm-1]; 8/#A!Ww]  
} Pmx -8w  
)2o?#8J  
public static void sort(int[] data, int algorithm) { h7oo7AP  
impl[algorithm-1].sort(data); JPHL#sKyz  
} +3BN}  
^[`%&uj!g  
public static interface Sort { SKN`2hD  
public void sort(int[] data); u c)eil  
} [|$h*YK  
VCkq"f7c w  
public static void swap(int[] data, int i, int j) { &Z@o Q  
int temp = data; RbnVL$c  
data = data[j]; N>`Aw^ _@&  
data[j] = temp; +Kc  
} &r /Mi%  
} nR~@#P\  
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