[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

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。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; ;G[V:.o-
} Gt w>R
int i1=l; *{g3ia
int i2=mid+1; *FlPGBjJ
for(int cur=l;cur<=r;cur++){ #36QO
if(i1==mid+1) OQVrg2A%(
data[cur]=temp[i2++]; T$4{fhV \
else if(i2>r) 8y;Rw#Dz
data[cur]=temp[i1++]; x9_mlZ
else if(temp[i1] data[cur]=temp[i1++]; _P>YG<*"kQ
else iOE. .xA:
data[cur]=temp[i2++]; k]b*&.EY1
} iI3:<j l
} +vBi7#&
+$2{u_m,
} ?,} u6tH
T]#V
改进后的归并排序: Q;h.}N8W
ZnG.::&:
package org.rut.util.algorithm.support; +#O+%!
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import org.rut.util.algorithm.SortUtil; dP5x]'"x
%uW=kr
/** $TQhr#C]
* @author treeroot #6`5-5Ks;
* @since 2006-2-2 ?jx]%n fV
* @version 1.0 04a ^jjc
*/ dC11kqqj
public class ImprovedMergeSort implements SortUtil.Sort { rIyH/=;
^^y eC|~N:
private static final int THRESHOLD = 10; 'ofj1%c
&w@]\7L,:
/* h$cm:uks
* (non-Javadoc) v2T2/y%
* Zk3Pv0c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .~z'm$s1o
*/ 60D36b(
public void sort(int[] data) { FG?Mc'r&
int[] temp=new int[data.length]; sD|l}f
mergeSort(data,temp,0,data.length-1); SZykG[
} X{9^$/XsJ
|Uh8b %
private void mergeSort(int[] data, int[] temp, int l, int r) { .@1+}0
int i, j, k; .`or^`X3
int mid = (l + r) / 2; ,75)
if (l == r) Q*ITs!~Z
return; "wUIsuG/p
if ((mid - l) >= THRESHOLD) N&9o 1_}
mergeSort(data, temp, l, mid); rhv~H"qzW
else &L o TO+
insertSort(data, l, mid - l + 1); } ueFy<F
if ((r - mid) > THRESHOLD) WT *"V<Z
mergeSort(data, temp, mid + 1, r); /l$x}
else 2YD\KXDo
insertSort(data, mid + 1, r - mid); w.qtSW6M+
)"?4d[ 5
for (i = l; i <= mid; i++) { i'~-\F!
temp = data; [%W'd9`>
} Q|y}mC/
for (j = 1; j <= r - mid; j++) { 1wSAwpz
temp[r - j + 1] = data[j + mid]; A5l Cc b
} C.j+Zb1Z(
int a = temp[l]; hmy%X`%j
int b = temp[r]; F^!D[:;jK
for (i = l, j = r, k = l; k <= r; k++) { 2y[Q
if (a < b) { JK,MK|
data[k] = temp[i++]; (d9~z
a = temp; &L|oqXE0L
} else { ('J/Ww<
data[k] = temp[j--]; So%X(, |
b = temp[j]; Im]@#X
} pEyZH!W
} yOM/UdWq
} h]7_ N,
lg%fjBY
/** 1" '3/MFQ8
* @param data 0uy'Py@2<
* @param l ucCf%T\:
* @param i d0J/"<
*/ 0KA*6]h t
private void insertSort(int[] data, int start, int len) { @N'n>8Wn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bk8}K=%w
} vu0Ql1
} +LHU}'|
} 8}%F`=Y0
} ;`AB-
v>X!/if<y
堆排序： 2mY!gVi
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package org.rut.util.algorithm.support; y6 (L=$+B
hY}Q|-|
import org.rut.util.algorithm.SortUtil; +.cpZqWn3
R~<N*En~
/** \p!UY3'
* @author treeroot ]w*"KG!(
* @since 2006-2-2 A%w9Da?B
* @version 1.0 jN6V`Wh_
*/ +!).'
public class HeapSort implements SortUtil.Sort{ *qpFtBg
FDoPW~+[
/* (non-Javadoc) 'Oa3 6@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4*_jGw
*/ Xj, %t}
public void sort(int[] data) { ED0cnr\yG
MaxHeap h=new MaxHeap(); -TD\?Q
h.init(data); T;M ;c.U
for(int i=0;i h.remove(); bH+NRNI]
System.arraycopy(h.queue,1,data,0,data.length); k(H&Af+
} fW= N
d` GN!^
private static class MaxHeap{ V x#M!os0
X5owAc6
void init(int[] data){ =gF035
this.queue=new int[data.length+1]; %oBP6|e
for(int i=0;i queue[++size]=data; "#)|WVa=BM
fixUp(size); Jm!,=}oP'
} 'Agw~ &$
} [aSuEu?mC
(wj:Gc
private int size=0; Gf8^nfr
!'_7MM
private int[] queue; \.2i?<BC
8#!g;`~ D
public int get() { zk<V0NJIL*
return queue[1]; EIw] 9;'_
} ~d7t\S
;*?>w|t}w
public void remove() { HMVP71
SortUtil.swap(queue,1,size--); V u")%(ix
fixDown(1); {Q>OZm\+
} 0"7+;(\1Rk
file://fixdown 1$RJzHS
private void fixDown(int k) { GZO:lDdA
int j; +-tFgXG
while ((j = k << 1) <= size) { k'r}@-X
if (j < size %26amp;%26amp; queue[j] j++; *I :c@iCNJ
if (queue[k]>queue[j]) file://不用交换 aV5M}:D
break; #^$_/Q#C
SortUtil.swap(queue,j,k); et5lfj
k = j; pPa]@ z~O
} 89>}`:xS^
} gaN/ kp
private void fixUp(int k) { p2Khfl6-
while (k > 1) { UvGxA[~2+
int j = k >> 1; +TbAtkEF*
if (queue[j]>queue[k]) (:8a6=xQ
break; OPN\{<`*d
SortUtil.swap(queue,j,k); 0{vT`e'
k = j; Ma!
} OxDqLX
} %GTFub0F
(Y'cxwj%
} %Bw:6Y4LZ
2d*bF.
} =4`wYh
%}(`?
SortUtil： +D5gbxZX
N!c FUZ5]
package org.rut.util.algorithm; O?g;Ny
#OPEYJ;*9d
import org.rut.util.algorithm.support.BubbleSort; ,K[e?(RP
import org.rut.util.algorithm.support.HeapSort; @_f^AQ
import org.rut.util.algorithm.support.ImprovedMergeSort; hZfj$|<
import org.rut.util.algorithm.support.ImprovedQuickSort; T; tY7;<
import org.rut.util.algorithm.support.InsertSort; 6yy%_+k*
import org.rut.util.algorithm.support.MergeSort; JXL?.{'A
import org.rut.util.algorithm.support.QuickSort; /?r A|
import org.rut.util.algorithm.support.SelectionSort; ?o[h$7`o6
import org.rut.util.algorithm.support.ShellSort; .8W-,R4
M~\dvJ$cH
/** cW>=/
* @author treeroot =s!0EwDH3
* @since 2006-2-2 .mfLHN%:
* @version 1.0 sJx_X8
*/ hYpxkco"4'
public class SortUtil { R& t*x
public final static int INSERT = 1; \t)va:y
public final static int BUBBLE = 2; .O"a:^i
public final static int SELECTION = 3; >=97~a+.
public final static int SHELL = 4; &(,\~
public final static int QUICK = 5; KO=$Hr?f;
public final static int IMPROVED_QUICK = 6; @*|VWHR
public final static int MERGE = 7; Awa| (]
public final static int IMPROVED_MERGE = 8; )Mdddz4
public final static int HEAP = 9; 4_5f4%S
5H.~pc2y
public static void sort(int[] data) { D&F{0
sort(data, IMPROVED_QUICK); EtzSaB*|
} {Vj&i.2,
private static String[] name={ VIdKe&,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4ams~
}; iS,l
&u[{VR:
private static Sort[] impl=new Sort[]{ Y>w7%N
new InsertSort(), 1s(T#jh
new BubbleSort(), ^P@:CBO
new SelectionSort(), OC*28)
new ShellSort(), ;+XrCy!.)L
new QuickSort(), h_?`ESI~
new ImprovedQuickSort(), 1v|-+p42
new MergeSort(), "7y,d%H
new ImprovedMergeSort(), m|W17LhW{
new HeapSort() BL 1KM2]
}; y:98}gW`n
FA*$ dwp
public static String toString(int algorithm){ (a#gCG\
return name[algorithm-1]; -B#1+rUW
} WGn=3(4
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public static void sort(int[] data, int algorithm) { pZ'q_Oux
impl[algorithm-1].sort(data); 0]bt}rh
} uQ-GJI^t
J{b#X"i
public static interface Sort { FShjUl>mV
public void sort(int[] data); g0j)k6<6(Y
} I9zs
|&8XmexLb
public static void swap(int[] data, int i, int j) { ns>$
int temp = data; 3[u- LYW
data = data[j]; _aevaWtEx
data[j] = temp; BS fmS(.
} >[aR8J/U
} 1<'z)r4