[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; ,j wU\xo`C
} >E^?<}E~.
int i1=l; lTe}[@(
int i2=mid+1; K7}EL|Kx
for(int cur=l;cur<=r;cur++){ h: :'s&|
if(i1==mid+1) 5VIpA
data[cur]=temp[i2++]; |D)NPN&
else if(i2>r) V-a/%_D
data[cur]=temp[i1++]; V%k[S|f3
else if(temp[i1] data[cur]=temp[i1++]; {= Dtajz
else C5QPt
data[cur]=temp[i2++]; ay6G1\0W
} N#{d_v^H?d
} Q&:%U
y XZZ)i_
} "~x\bSY
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改进后的归并排序: I@P[}XS
kzr9-$eb
package org.rut.util.algorithm.support; wVk2Fr(
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import org.rut.util.algorithm.SortUtil; ,c"_X8Fkx$
G1M}g8 ]h
/** ~k+"!'1
* @author treeroot 2%0zPflT
* @since 2006-2-2 v :]y#y
* @version 1.0 /6}4<~~4TA
*/ ?RGL0`Lg
public class ImprovedMergeSort implements SortUtil.Sort { GutH}Kz"&
:~loy'
private static final int THRESHOLD = 10; *v3/8enf
aNb=gjLpt
/* kRNr`yfN
* (non-Javadoc) 1\q(xka{
* c38RE,4U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }Q_IqI[7
*/ yrO'15TB
public void sort(int[] data) { x!bFbi#!"
int[] temp=new int[data.length]; ?KpHvf'
mergeSort(data,temp,0,data.length-1); 9 m&"x/k
} ?cr;u~-=
(:E_m|00;
private void mergeSort(int[] data, int[] temp, int l, int r) { y %Get
int i, j, k; x P{L%.
int mid = (l + r) / 2; XG ]yfux`
if (l == r) Py\xN
return; $K^"a
if ((mid - l) >= THRESHOLD) I z~#G6]M
mergeSort(data, temp, l, mid); fI[tU(x
else YIb5jK`
insertSort(data, l, mid - l + 1); )0`;leli
if ((r - mid) > THRESHOLD) =IV_yor
mergeSort(data, temp, mid + 1, r); ])}{GW
else 9'3%%o
insertSort(data, mid + 1, r - mid); qa#Fa)g*
6FG h=~{3,
for (i = l; i <= mid; i++) { t ),~w,7(J
temp = data; &Wfs6g
} t3u"2B7oG
for (j = 1; j <= r - mid; j++) { bO1J#bcZ
temp[r - j + 1] = data[j + mid]; raY5 nc{
} S$\lM<M
int a = temp[l]; owZjQ
int b = temp[r]; E-_)w
for (i = l, j = r, k = l; k <= r; k++) { '{XDhK
if (a < b) { :k8>)x] )
data[k] = temp[i++]; *MW)APw=
a = temp; UBuk-tq
} else { &0SGAJlec
data[k] = temp[j--]; UTKS<.q
b = temp[j]; ,e( |,u
} S6,AY(V
} 85Q2c
} KL#F5\ E
53P\OG^G`
/** +`9 ]L]J]4
* @param data 2<>n8K
* @param l X}p#9^%N
* @param i %Fq"4%
*/ -[i9a:eRM
private void insertSort(int[] data, int start, int len) { tY !fO>Fn~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~1wAk0G`n
} xB3;%Lc
} >8Zz<S&z
} 67%eAS
} Mcc774'*9
+mhYr]Z
堆排序： =$Sf]L
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package org.rut.util.algorithm.support; J|_&3@r
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import org.rut.util.algorithm.SortUtil; im9 B=D
/XS6X
/** '?t]iRCeI7
* @author treeroot [J\5DctX;c
* @since 2006-2-2 9_JK.
* @version 1.0 'VFxg,
*/ ]Rohf WHX
public class HeapSort implements SortUtil.Sort{ [Ua4{3#
dKDtj:
/* (non-Javadoc) -liVYI2s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EAxg>}'1j
*/ 1QtT*{zm$F
public void sort(int[] data) { }Xyu"P
MaxHeap h=new MaxHeap(); ~!meO;|W
h.init(data); pA3j@w
for(int i=0;i h.remove(); &tw.]3
System.arraycopy(h.queue,1,data,0,data.length); r!V#@Md
} {=IK(H
>`n0{:.1za
private static class MaxHeap{ ##Z:/SU
R"e~0WO
void init(int[] data){ .3qaaXeH
this.queue=new int[data.length+1]; ].]yqD4P
for(int i=0;i queue[++size]=data; (`GO@
fixUp(size); v3[Z]+ ]
} gg'lb{oG
} 9X,dV7 yW
(FbqKx'uq
private int size=0; 8U0y86q>)E
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private int[] queue; OgyETSN8C
R!W!8rr3
public int get() { gSEj/?
return queue[1]; 0`"]mYH
} f"xi7vJv!f
jIK*psaV
public void remove() { YKf,vHau
SortUtil.swap(queue,1,size--); Namw[TgJ
fixDown(1); C>$5<bx
} 8NudY3cU!
file://fixdown _ot4HmD
private void fixDown(int k) { h|yv*1/|
int j; LT!B]y
while ((j = k << 1) <= size) { qWKpnofa
if (j < size %26amp;%26amp; queue[j] j++; 6(sqS~D
if (queue[k]>queue[j]) file://不用交换 d{hbgUSj
break; ldrKk'S,B
SortUtil.swap(queue,j,k); c 6}d{B[
k = j; ;WJ}zjo >
} Wd~aSz9
} N/DcaHFYo
private void fixUp(int k) { yJWgz`/L
while (k > 1) { 15r,_Gp8
int j = k >> 1; hdW",Bf'
if (queue[j]>queue[k]) Kpz>si?CL
break; )I 4d_]&
SortUtil.swap(queue,j,k); N6cf`xye
k = j; &BqRyUM$F
} ,IA0n79
} wg^#S
&fdH HN
} m;WUp{'
{CR~G2Z
} BZQ98"Fz*
,G e7 9(
SortUtil： cn v4!c0
2uZ <q?=
package org.rut.util.algorithm; :1q+[T/ @
A1{P"p!
import org.rut.util.algorithm.support.BubbleSort; -_ .f&l8
import org.rut.util.algorithm.support.HeapSort; bRJYw6oA<
import org.rut.util.algorithm.support.ImprovedMergeSort; GbwcbfH
import org.rut.util.algorithm.support.ImprovedQuickSort; SOE#@{IXBa
import org.rut.util.algorithm.support.InsertSort; a)MjX<y
import org.rut.util.algorithm.support.MergeSort; )W:`Q&/G
import org.rut.util.algorithm.support.QuickSort; YM 0f_G=
import org.rut.util.algorithm.support.SelectionSort; ?Vb=W)Es
import org.rut.util.algorithm.support.ShellSort; JHwkLAuz
yAU[A
/** |rH;}t|un
* @author treeroot :t?9$ dL
* @since 2006-2-2 -. L)-%wIV
* @version 1.0 chQt8Ar3
*/ S6h=} V)
public class SortUtil { e-,U@_B
public final static int INSERT = 1; .S`Ue,H
public final static int BUBBLE = 2; "Fy34T0N
public final static int SELECTION = 3; >J[g)$,
public final static int SHELL = 4; >"f,'S5*
public final static int QUICK = 5; Pg-~^"?y
public final static int IMPROVED_QUICK = 6; 1HskY| X
public final static int MERGE = 7; Oq(_I b)9
public final static int IMPROVED_MERGE = 8; /4YXx|V
public final static int HEAP = 9; 24:;vcb
k[6@\D-
public static void sort(int[] data) { =8X`QUmT
sort(data, IMPROVED_QUICK); v/c8P\
} iH#~eg
private static String[] name={ VFT G3,kI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +&jWM-T"-
}; u ?7(A%
sT[)r]`T
private static Sort[] impl=new Sort[]{ QN9$n%Z
new InsertSort(), l:a+o gm3
new BubbleSort(), miCt)Qd
new SelectionSort(), k sJz44
new ShellSort(), )@ZJ3l.
new QuickSort(), ;j-@ $j
new ImprovedQuickSort(), U/>f" F
new MergeSort(), T[N:X0
new ImprovedMergeSort(), o\@1\#a
new HeapSort() +hpXMO%?
}; lJ3/^Htn
6i(V+
public static String toString(int algorithm){ MX|CL{H
return name[algorithm-1]; o*:VG\#Z6
} Mlb=,l
/wK5YN.em
public static void sort(int[] data, int algorithm) { [`_&d7{-4b
impl[algorithm-1].sort(data); 6`]R)i]
} /,"Z^=
KwN o/x| v
public static interface Sort { ?cG+rC%
public void sort(int[] data); r42[pi]F
} a_^3:}i~D
f_Y[I:
public static void swap(int[] data, int i, int j) { n&iWYECz
int temp = data; P!,\V\TY]
data = data[j]; #^gn,^QQ
data[j] = temp; {:IOTy
} l,1}1{k&
} 9r fR