[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; /:(A9b-B
} t(uvc{K*
int i1=l; Q!V:=d
int i2=mid+1; S_Wq`I@b
for(int cur=l;cur<=r;cur++){ "V26\
if(i1==mid+1) UF#!6"C@
data[cur]=temp[i2++]; /[\g8U{5B}
else if(i2>r) 1(IZ,*i
data[cur]=temp[i1++]; P@vUQ
else if(temp[i1] data[cur]=temp[i1++]; L-D4>+
else ob;|%_
data[cur]=temp[i2++]; 2[qfF6FHA
} vB_3lAJt@
} ~nfOV*
w3);ZQ|
} $m2#oI'D
_ s3d$C?B
改进后的归并排序: b&&l
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package org.rut.util.algorithm.support; NGl 8*Af
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import org.rut.util.algorithm.SortUtil; 7KhS{w6
rMbq_5}
/** 0r1GGEW`s
* @author treeroot 9 $$uk'}w!
* @since 2006-2-2 \+O.vRc"M
* @version 1.0 cVL|kYVWT
*/ i:0v6d
public class ImprovedMergeSort implements SortUtil.Sort { {eaR,d~X
k!0O[U
private static final int THRESHOLD = 10; g}D)MlXRq
nco.j:
/* hoqZb<:
* (non-Javadoc) `HXv_9
* zH}3J}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5buW\_G)
*/ iiIns.V
public void sort(int[] data) { _Ik?WA_;
int[] temp=new int[data.length]; bAZoi0LR
mergeSort(data,temp,0,data.length-1); m]>zdP+
} e!*]y&W
iv *$!\Cd
private void mergeSort(int[] data, int[] temp, int l, int r) { y2#>a8SRS
int i, j, k; nJN-U+)u
int mid = (l + r) / 2; M x#L|w`r
if (l == r) ]wU/yc)e
return; 6Lq`zU^
if ((mid - l) >= THRESHOLD) Gd%i?(U,R
mergeSort(data, temp, l, mid); 1~L;S
else fOHbgnL>
insertSort(data, l, mid - l + 1); ?IHt T3'Rt
if ((r - mid) > THRESHOLD) [:cD
mergeSort(data, temp, mid + 1, r); ;kk[x8$
else & mOn]
insertSort(data, mid + 1, r - mid); I$t8Ko._"
AF{uFna
for (i = l; i <= mid; i++) { <.n,:ir
temp = data; 3d6z_Yd:
} ITw *m3
for (j = 1; j <= r - mid; j++) { W<X3!zuKSg
temp[r - j + 1] = data[j + mid]; )tI^2p{
} &<98nT
int a = temp[l]; s"=TM$Vb
int b = temp[r]; 8c)GUx
for (i = l, j = r, k = l; k <= r; k++) { nD BWm`kN
if (a < b) { t[`LG)
data[k] = temp[i++]; Gg'!(]v
a = temp; .T9$O]:o
} else { m1pA]}Y/5o
data[k] = temp[j--]; @-dGZ5
b = temp[j]; 9m)$^U>oz
} Hp=BnN
} -a)1L'R
} A r]*?:4y[
>fXtu:C-!J
/** qKfUm:7Q_
* @param data eavn.I8J
* @param l Ra|P5
* @param i l!x+K&
*/ zX_F+"]THt
private void insertSort(int[] data, int start, int len) { O3o^%0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Xs052c|s
} 0* F` h
} f X[xZGV,
} E,Rj;?
} :lB`K>)iB}
j J{F0o
堆排序： LRu,_2"
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package org.rut.util.algorithm.support; $UH:r
y<FC7
import org.rut.util.algorithm.SortUtil; 2@ZVEN
Nz2VaZ
/** 47Z3nl?
* @author treeroot toPbFU'
* @since 2006-2-2 7?whxi Qs
* @version 1.0 -4Hb]#*2
*/ Q0R05*
public class HeapSort implements SortUtil.Sort{ =l43RawAmu
W9%v#;2
/* (non-Javadoc) A,_O=hA2I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ; R+>}6
*/ T-a>k.}y
public void sort(int[] data) { GfELL`yz
MaxHeap h=new MaxHeap(); =6dAF"b)
h.init(data); IQO|)53)
for(int i=0;i h.remove(); O.B9w+G=
System.arraycopy(h.queue,1,data,0,data.length); 2/4zg
} t<` As6}
_s5^\~ao
private static class MaxHeap{ RdPk1?}K
/ rc[HbNg.
void init(int[] data){ GFdbwn5B
this.queue=new int[data.length+1]; -fPiHKJ
for(int i=0;i queue[++size]=data; X3}eq|r9
fixUp(size); cOV9g)7^O
} M)oKtiav*
} 'd$RNqe
&K0b3AWc
private int size=0; `CVkjLiy
&'>m;W
private int[] queue; hEB5=~A_
jV}8VK*`+
public int get() { Np+PUu>
return queue[1]; $$m0mK
} P5?VrZy
_ARG "
public void remove() { BFW b0;+
SortUtil.swap(queue,1,size--); q|<B9Jk
fixDown(1); }8 z:L<
} 'w=|uE {^
file://fixdown !0@4*>n
private void fixDown(int k) { o9e8Oj&
int j; T9V=#+8#"
while ((j = k << 1) <= size) { Bn]=T
if (j < size %26amp;%26amp; queue[j] j++; I/njyV)H
if (queue[k]>queue[j]) file://不用交换 u"qVT9C$=
break; ]Kq<U%x$
SortUtil.swap(queue,j,k); 9iG&9tB@
k = j; C})Dvh
} 8Ij<t{Lps
} QZ&(e2z
private void fixUp(int k) { [cnuK
while (k > 1) { o>8~rtl
int j = k >> 1; ;<garDf
if (queue[j]>queue[k]) vIJ5iLF
break; JhFn"(O
SortUtil.swap(queue,j,k); -Rw3[4>@O"
k = j; '*y(F*7+
} j_2g*lQ7a
} TMMKRC1<
!=:>yWQ
} jM$bWtq2
qt@/
} +4%~.,<_to
L-w3A:jk
SortUtil： !s-A`} s+
tG$O[f@U6
package org.rut.util.algorithm; M3-lL;!n
N] sbI)Z@
import org.rut.util.algorithm.support.BubbleSort; Z2M(euzfi3
import org.rut.util.algorithm.support.HeapSort; 8S#$'2sT
import org.rut.util.algorithm.support.ImprovedMergeSort; `;}`>!8j
import org.rut.util.algorithm.support.ImprovedQuickSort; A:(|"<lA
import org.rut.util.algorithm.support.InsertSort; ch8VJ^%Ra1
import org.rut.util.algorithm.support.MergeSort; 4uiq'-
import org.rut.util.algorithm.support.QuickSort; i6V$mhL
import org.rut.util.algorithm.support.SelectionSort; 6#U~>r/
import org.rut.util.algorithm.support.ShellSort; ]!AS%D`
,CyX*k8o
/** &'/"=lK
* @author treeroot }9\_s*
* @since 2006-2-2 mvjx &+q
* @version 1.0 nKGQU,C
*/ @ 3=pFYW)
public class SortUtil { F[}#7}xjA
public final static int INSERT = 1; {'4#{zmp
public final static int BUBBLE = 2; eWDXV-xD
public final static int SELECTION = 3; @}4>:\es
public final static int SHELL = 4; v,}C~L3
public final static int QUICK = 5; n0l|7:Mk
public final static int IMPROVED_QUICK = 6; ?sQg{1"Zr
public final static int MERGE = 7; nZB~l=
public final static int IMPROVED_MERGE = 8; Ij(<(y{?Q1
public final static int HEAP = 9; >`03EsU
P{)D_Bi
public static void sort(int[] data) { g*b`o87PI
sort(data, IMPROVED_QUICK); - 2L(])t6
} (@}^ 3jpT
private static String[] name={ z~h?"'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =Oy&f:s
}; ?Vg~7Eu0
[UXVL}tk
private static Sort[] impl=new Sort[]{ :Ob4WU
new InsertSort(), ?-c|c_|$
new BubbleSort(), :(XyiF<Ud
new SelectionSort(), %EU_OS(u.{
new ShellSort(), >!1]G"U
new QuickSort(), R_G2C@y*
new ImprovedQuickSort(), 1K3XNHF
new MergeSort(), -E\G3/*51
new ImprovedMergeSort(), /rZk^/'
new HeapSort() 4S'e>:
}; $EY[CA E
Xi"9y @
public static String toString(int algorithm){ &qWg$_Yh
return name[algorithm-1]; cV>?*9z0
} p|->z
P\Qvj7_
public static void sort(int[] data, int algorithm) { YMu#<ZG
impl[algorithm-1].sort(data); "&SE!3*m`I
} vx?KenO}
AT I=&O`
public static interface Sort { _XZK2Q[
public void sort(int[] data); q}Po)IUT`5
} =*'yGB[x)
;cf$u}+
public static void swap(int[] data, int i, int j) { (KC08
int temp = data; fwt+$`n
data = data[j]; ?jMM@O`Nu
data[j] = temp; 0Lj;t/mG
} 9)+!*(D
} @VP/kut