[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; '}bgLv
} 3"KCh\\b
int i1=l; nt7.?$
int i2=mid+1; (mtk 4
for(int cur=l;cur<=r;cur++){ .];=Pu^
if(i1==mid+1) x0w4)Ic5
data[cur]=temp[i2++]; qR+!l(
else if(i2>r) |64~K\X
data[cur]=temp[i1++]; YcK|.Mq':
else if(temp[i1] data[cur]=temp[i1++]; }s<4{:cv+
else :T !'N\7
data[cur]=temp[i2++]; L AAHEv
} K1!j fp
} ax5<#3__
ur7q [n
} u.Tcg^v
v^iL5y!
改进后的归并排序: G<rHkt@[
7CTFOAx#
package org.rut.util.algorithm.support; PQ$%H>{
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import org.rut.util.algorithm.SortUtil; 2n"V}p>8i#
|T)6yDL
/** +l{=
* @author treeroot t"'7m^j
* @since 2006-2-2 @xYlS5{
* @version 1.0 Qtv&ijFC
*/ i5?q,_
public class ImprovedMergeSort implements SortUtil.Sort { R>mmoG}MQ[
Oh6fj}eK
private static final int THRESHOLD = 10; !lc[
+<3XJ7D
/* HLaRGN3,
* (non-Javadoc) (7=!+'T"
* RxWVe-Dg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d8=x0~7
*/ 8::$AQL3
public void sort(int[] data) { ?[Q3q4
int[] temp=new int[data.length]; (tw)nF
mergeSort(data,temp,0,data.length-1); &/]Fc{]^$f
} :;fHDU|
mahJSz(3
private void mergeSort(int[] data, int[] temp, int l, int r) { xx9 g''Q
int i, j, k; s6.M\^
int mid = (l + r) / 2; @Y<bwv
if (l == r) ;{tj2m,
return; x%!s:LVX
if ((mid - l) >= THRESHOLD) f-G:uI_
mergeSort(data, temp, l, mid); @{tz:f
else F Yzi~L
insertSort(data, l, mid - l + 1); ,a]?S^:y]
if ((r - mid) > THRESHOLD) NDlF0f
mergeSort(data, temp, mid + 1, r); q]e`9/U
else .Blf5b
insertSort(data, mid + 1, r - mid); L4z ~B!uvF
ww $
for (i = l; i <= mid; i++) { qPy1;maXP
temp = data; kN4{13Qs*
} 64G[|" j D
for (j = 1; j <= r - mid; j++) { k" PayyAC
temp[r - j + 1] = data[j + mid]; 5T2CISmu
} ``\i58K{e
int a = temp[l]; "8^ Ch{G-
int b = temp[r]; v)t:|Q{I
for (i = l, j = r, k = l; k <= r; k++) { OJ5#4qJ[
if (a < b) { <;m<8RjX
data[k] = temp[i++]; r@t9Ci=}
a = temp; Mh/dpb\Z
} else { *<jAiB,O*
data[k] = temp[j--]; pRIhFf
b = temp[j]; p=GBUII #
} @ljA
} _ff`y
} nR}sNl1
5l2 ?
/** IIF]/Ek]
* @param data 92x(u%~E
* @param l hYNY"VB
* @param i k_5L4c:"
*/ q?DTMKx
private void insertSort(int[] data, int start, int len) { v}O30wE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'o+L41
} CpeU5 o@
} [] `&vWZ
} =JbRu|/
} dq&yf7
s!&#c`=
堆排序： 9c#+qH
pU%n]]qF
package org.rut.util.algorithm.support; #W'HR
> BY&,4r
import org.rut.util.algorithm.SortUtil; wq(7|!Eix
Z/0fXn})
/** (SDr!!V<
* @author treeroot uU <=d
* @since 2006-2-2 _c*=4y
* @version 1.0 s{S4J'VW
*/ M&@b><B
public class HeapSort implements SortUtil.Sort{ &d+Kg0:
0y;*Cfi9
/* (non-Javadoc) )Sg~[WxDv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hjB@o#S
*/ dWUm\t'#
public void sort(int[] data) { ~&8^9E a
MaxHeap h=new MaxHeap(); 'y2nN=CN
h.init(data); PQnF
for(int i=0;i h.remove(); q[`]D7W "
System.arraycopy(h.queue,1,data,0,data.length); 6[LM_eP
} vCxD~+zf
1[qLA!+
private static class MaxHeap{ QnXA*6DJ
G!W[8UG
void init(int[] data){ =K{"{5Wb
this.queue=new int[data.length+1]; Wm"4Ae:B
for(int i=0;i queue[++size]=data; + SFVv_n
fixUp(size); I)cFG{~L
} Hh-+/sO~"
} %?uc><&?e
;WM"cJo9
private int size=0; $Ifmc`r1
cU@SIJ)
private int[] queue; [}/LD3
i2YuOV!
public int get() { V_RTI.3p
return queue[1]; dC$Em@Nb
} d`nVc50
XZJ+h,f
public void remove() { OjF_ %5
SortUtil.swap(queue,1,size--); Ib\iT:AJ
fixDown(1); YN2sdG
} wztA3ZL*W1
file://fixdown H!nr^l'+
private void fixDown(int k) { `m>*d!h=
int j; ##;Er47@^
while ((j = k << 1) <= size) { 65p?Igb
if (j < size %26amp;%26amp; queue[j] j++; #H{<gjs]
if (queue[k]>queue[j]) file://不用交换 ( Qcp{q
break; ~ ! 3I2
SortUtil.swap(queue,j,k); " '6;/N
k = j; qT"Q1xU[
} Bck7\
} m~Bl*`~M
private void fixUp(int k) { }L3oR
while (k > 1) { jJY"{foWV
int j = k >> 1; f3{MvAy[
if (queue[j]>queue[k]) :Jy'#c
break; C] 9p5Hs
SortUtil.swap(queue,j,k); *R3f{/DK
k = j; PBxCx3a{
} 6s\Kt3=
} .k9{Yv0
7J|VD#DE$Y
} 0-|byAh
\B 0ywN?
} ;3: q?&
pN9A{v(
SortUtil： %8Dzo
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package org.rut.util.algorithm; Eam
dBe`p5Z
import org.rut.util.algorithm.support.BubbleSort; oiyzHx
import org.rut.util.algorithm.support.HeapSort; xY U.D+RY
import org.rut.util.algorithm.support.ImprovedMergeSort; 2fS[J'-o
import org.rut.util.algorithm.support.ImprovedQuickSort; eDJfU
import org.rut.util.algorithm.support.InsertSort; ~aOuG5XK
import org.rut.util.algorithm.support.MergeSort; '+vA\(K
import org.rut.util.algorithm.support.QuickSort; IlE_@gS8
import org.rut.util.algorithm.support.SelectionSort; UkHY[M7;
import org.rut.util.algorithm.support.ShellSort; rEv*)W
t|<NI+H(e
/** ~J8pnTY
* @author treeroot i|}[A
* @since 2006-2-2 psC mbN
* @version 1.0 _5m#2u51i
*/ w'fT=v)
public class SortUtil { DUe&r,(4O
public final static int INSERT = 1; E)7F\w
public final static int BUBBLE = 2; S:q3QgU=X
public final static int SELECTION = 3; .G(llA}
public final static int SHELL = 4; f0<%&2ym
public final static int QUICK = 5; ]oV{t<0a
public final static int IMPROVED_QUICK = 6; QgD g}\P
public final static int MERGE = 7; nJ"YIT1K]p
public final static int IMPROVED_MERGE = 8; ]%Nlv(
public final static int HEAP = 9; H_Kj7(=&>
?wF'<kEH
public static void sort(int[] data) { |),'9
sort(data, IMPROVED_QUICK); +sx 8t
} M=*bh5t%]
private static String[] name={ x^y"<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qYf |Gv
}; 7aYn0_NKp
MXiQ1x
private static Sort[] impl=new Sort[]{ C?=P
new InsertSort(), _s$_Sa ;
new BubbleSort(), hf<^/@^tK
new SelectionSort(), .tmiQ.
new ShellSort(), N!x =eC
new QuickSort(), 6uKMCQ=h
new ImprovedQuickSort(), /c-r
new MergeSort(), ^/=#UQ*k
new ImprovedMergeSort(), UMp/\&0
new HeapSort() A@D2+fS
}; 3 M10fI?
8kt5KnD2
public static String toString(int algorithm){ Q33"u/-v
return name[algorithm-1]; %#Z/2<_
} A'K%WW*'U
Gqcz<=/
public static void sort(int[] data, int algorithm) { j.ldaLdG
impl[algorithm-1].sort(data); kR@Yl Yo
} 7Irau_
o/ mF#
public static interface Sort { :BukUket1e
public void sort(int[] data); he-Ji
} +"}=d3E6
q4$+H{xB
public static void swap(int[] data, int i, int j) { F3lw@b3])
int temp = data; xc:!cA{V
data = data[j]; -;XKcS7Ue
data[j] = temp; ~!d/8?!
} y}K\%;`[a
} s(LT