[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; a^sR?.+3
} *~fN^{B'!
int i1=l; 4e*0kItC
int i2=mid+1; %zX'u.}8#
for(int cur=l;cur<=r;cur++){ )rj.WK.
if(i1==mid+1) 6bqJM#y@
data[cur]=temp[i2++]; 21cIWvy
else if(i2>r) SxQ|1:i%
data[cur]=temp[i1++]; R[#5E|` `9
else if(temp[i1] data[cur]=temp[i1++]; R]ppA=1*_l
else _NZ) n)
data[cur]=temp[i2++]; s"a*S\a;b
} P,wFib^1
} eKu&_q
iUl{_vb
} XFBk:~}sI
oWJ}]ip
改进后的归并排序: YQ?|Vb U
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package org.rut.util.algorithm.support; dQ^k-
3bPVKsY
import org.rut.util.algorithm.SortUtil; JgK?j&!hs:
s]B^Sz=
/** ',O@0L]L
* @author treeroot f \4Qp
* @since 2006-2-2 sIELkF?.
* @version 1.0 u1<xt1K
*/ gc(1,hv
public class ImprovedMergeSort implements SortUtil.Sort { fWLsk
%%-kUe
private static final int THRESHOLD = 10; qo}kwwWN;
[N$@nA-d
/* *nC<1.JW
* (non-Javadoc) pp{%\td
* I5 2wTl0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4P`\fz
*/ sRoZvp5
public void sort(int[] data) { t+h"YiT
int[] temp=new int[data.length]; J(l6(+8
mergeSort(data,temp,0,data.length-1); @MN>ye'T
} {= z%('^
Y ,}p
private void mergeSort(int[] data, int[] temp, int l, int r) { zV2c`he%z
int i, j, k; ,U<Ku*}B
int mid = (l + r) / 2; AJmS1 B
if (l == r) wOa_"
return; 33u7
if ((mid - l) >= THRESHOLD) V<d'psb6
mergeSort(data, temp, l, mid); `Cb$8;)z
else f[ER`!
insertSort(data, l, mid - l + 1); ltD:w{PO]
if ((r - mid) > THRESHOLD) ,2?C^gxt
mergeSort(data, temp, mid + 1, r); } g
else m\~[^H~g
insertSort(data, mid + 1, r - mid); #b8/gRfS
t@4vEKw?.X
for (i = l; i <= mid; i++) { C{>?~@z&5
temp = data; TbXZU$[c
} zZE?G:isR
for (j = 1; j <= r - mid; j++) { -R\}Q"
temp[r - j + 1] = data[j + mid]; )s^XVs.-
} L\"=H4r
int a = temp[l]; s5z@`M5'm
int b = temp[r]; :;|x'[JoE?
for (i = l, j = r, k = l; k <= r; k++) { HX <;=m
if (a < b) { +SP5+"y@
data[k] = temp[i++]; mybDK'EW
a = temp; 9ge$)q@3
} else { zR5D)`Ph
data[k] = temp[j--]; $/d~bk@=l
b = temp[j]; w]%r]PwU+
} _ !Ph1
} W``e6RX-
} ")o.x7~N
$iF7hyZ
/** 9r)5d&,6
* @param data rAQ^:q
* @param l ''WX
* @param i NuXU2w~
*/ F,EHZ,<V
private void insertSort(int[] data, int start, int len) { w$t2Hd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f,?7,?x
} DSnsi@Mi
} s ^}V
} 1yKf=LZ^
} x'
I~mw\K{.3M
堆排序： [hiOFmMJZ-
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package org.rut.util.algorithm.support; wYF)G;[wM
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import org.rut.util.algorithm.SortUtil; DdFVOs|
)lW<:?k
/** 8)H"w$jq
* @author treeroot %R_8`4IQ
* @since 2006-2-2 =|G PSRQ
* @version 1.0 5N[Y2
*/ M.l;!U!}
public class HeapSort implements SortUtil.Sort{ Ao]F_hZ
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/* (non-Javadoc) "5YsBih
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )<~b*^kl\
*/ +)F8YMg e
public void sort(int[] data) { w}2yi#E[
MaxHeap h=new MaxHeap(); dvxH:,
h.init(data); /evh.S
for(int i=0;i h.remove(); 6: M
System.arraycopy(h.queue,1,data,0,data.length); ;aFQP:l/
} RnTPU`
O=+C Kx@
private static class MaxHeap{ *]H ./a:1
_R8-Hj E
void init(int[] data){ R2;-WxnN]
this.queue=new int[data.length+1]; ~7Jc;y&
for(int i=0;i queue[++size]=data; w!xSYh')
fixUp(size); }y0UyOa{C
} #G\)ZheG
} u{_T,k<!
; aMMIp
private int size=0; WFh!re%Z
|epe;/
private int[] queue; 8p!PR^OM@
S ":-5S6
public int get() { h.8J6;36
return queue[1]; a-kU?&* y
} M$?~C~b!*
2h/`RefHJ
public void remove() { MW&;{m?2(
SortUtil.swap(queue,1,size--); ~o8$/%Oeb/
fixDown(1); 7aU*7!U
} 9:esj{X
file://fixdown [}VEDx
private void fixDown(int k) { k r/[|.bq
int j; `rM-b'D
while ((j = k << 1) <= size) { EGa}ml/G
if (j < size %26amp;%26amp; queue[j] j++; WM"I r1
if (queue[k]>queue[j]) file://不用交换 czT$mKj3
break; Aimgfxag
SortUtil.swap(queue,j,k); ukPV nk
k = j; zz$*upxK
} 4f/8APA
} WRNO) f<
private void fixUp(int k) { 5^5h%~)}
while (k > 1) { +^%F8GB
int j = k >> 1; ,R]7{7$
if (queue[j]>queue[k]) UV:_5"-
break; ,0])]
SortUtil.swap(queue,j,k); |fa3;8!96
k = j; $60+}B`m
} :oZ30}
} Lu<'A4Q1
kdF#Nm
} `5gcc7b
x JepDCUJ>
} dpE+[O_
sF}E=lY
SortUtil： 3<'n>'
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package org.rut.util.algorithm; ho0T$hB
)v'DQAL
import org.rut.util.algorithm.support.BubbleSort; #kxg|G[Ol
import org.rut.util.algorithm.support.HeapSort; u'iOa
import org.rut.util.algorithm.support.ImprovedMergeSort; /njN*rhx&Z
import org.rut.util.algorithm.support.ImprovedQuickSort; \75%[;.
import org.rut.util.algorithm.support.InsertSort; Q#vur o
import org.rut.util.algorithm.support.MergeSort; oinF<-(
import org.rut.util.algorithm.support.QuickSort; 6T)D6;@L
import org.rut.util.algorithm.support.SelectionSort; KBOxr5w
import org.rut.util.algorithm.support.ShellSort; 2'/ ip@
qUVV374N
/** {=&pnu\
* @author treeroot ^6obxwVG
* @since 2006-2-2 0t<TZa]V
* @version 1.0 x2tx{Z
*/ V-)q&cbW]q
public class SortUtil { iHR?]]RF
public final static int INSERT = 1; d F),
public final static int BUBBLE = 2; gB&'MA!
public final static int SELECTION = 3; ?6a:!^eL
public final static int SHELL = 4; 6@nEcr
public final static int QUICK = 5; 2avSsN{^
public final static int IMPROVED_QUICK = 6; ;BpuNB
public final static int MERGE = 7; |)0kvf?
public final static int IMPROVED_MERGE = 8; zfvl<"Rv
public final static int HEAP = 9; uWgY+T
<oO^w&G
public static void sort(int[] data) { P,*R@N
sort(data, IMPROVED_QUICK); &"25a[x{B
} tcmG>^YM
private static String[] name={ {@({po
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]ul]L R%.
}; zg"<N
|>d56
private static Sort[] impl=new Sort[]{ ^[5yff 4
new InsertSort(), $Y>LUZ)b&8
new BubbleSort(), 3"cAwU9
new SelectionSort(), yht_*7.lM
new ShellSort(), ;i\i+:=
new QuickSort(), 9.>v ;:vL
new ImprovedQuickSort(), L0Xb^vx}m
new MergeSort(), ]G&d`DNV
new ImprovedMergeSort(), Vo%@bj~>
new HeapSort() <w8*Ly:L
}; 6 Rg{^ERf
qd(`~a
public static String toString(int algorithm){ <r_ldkZ
return name[algorithm-1]; ,US]
} 0f1*#8-6
XlR.Y~
public static void sort(int[] data, int algorithm) { 1?Wk qQ
impl[algorithm-1].sort(data); ~%>ke
} Q]66v$
3>c<E1
public static interface Sort { >^kRIoBkg
public void sort(int[] data); : 3*(kb1)&
} tP7l ;EX4
2Fp.m}42i(
public static void swap(int[] data, int i, int j) { DzH1q r
int temp = data; UoBmS5
data = data[j]; /tDwgxJ
data[j] = temp; _6xC4@~h*
} abx/h#_q
} qfx=