[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; [KrWL;[1<
} !9GJ9ZEXM
int i1=l; c`:hEQs
int i2=mid+1; m# #( uSh
for(int cur=l;cur<=r;cur++){ %jaB>4.A:
if(i1==mid+1) p<>xqU
data[cur]=temp[i2++]; ,nn5LQ|l.j
else if(i2>r) s|iph~W!L
data[cur]=temp[i1++]; C9l5zb~D
else if(temp[i1] data[cur]=temp[i1++]; (eX9O4
else v=!Ap ; 2L
data[cur]=temp[i2++]; WT(inf[
} 6u-@_/O5R3
} / S
/*g9drwaa
} ~"\qX+
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改进后的归并排序: ut6M$d4
4R_Vi[i
package org.rut.util.algorithm.support; 3V")~m
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import org.rut.util.algorithm.SortUtil; m)G=4kK52-
RQ?T~ASs
/** /18Z4TA
* @author treeroot R#j-Z#/"
* @since 2006-2-2 I5RV:e5b
* @version 1.0 9o-fI@9
*/ !'uLV#YEZ
public class ImprovedMergeSort implements SortUtil.Sort { >r Nff!Ow
^X2U A{
private static final int THRESHOLD = 10; u{%gB&nC
*69yB
/* /8!s C D
* (non-Javadoc) cG|)z<Z
* \BB(0Ah+t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !3~VoNh,
*/ 1d49z9F
public void sort(int[] data) { @8zp(1.
int[] temp=new int[data.length]; .54E*V1
mergeSort(data,temp,0,data.length-1); f.f5f%lO~
} *We.?"X'].
xEK+NKTeV
private void mergeSort(int[] data, int[] temp, int l, int r) { %9.] bd|%F
int i, j, k; KX*Hev'K
int mid = (l + r) / 2; **\BP,]}
if (l == r) h&|wqna
return; L||_Jsu
if ((mid - l) >= THRESHOLD) rE?(_LI
mergeSort(data, temp, l, mid); RG(m:N
else s3m]rC
insertSort(data, l, mid - l + 1); ?h`Ned0P
if ((r - mid) > THRESHOLD) ] iKFEd
mergeSort(data, temp, mid + 1, r); BKoc;20;
else 5j(3pV`_
insertSort(data, mid + 1, r - mid); y w"Tw
!\{&^,y
for (i = l; i <= mid; i++) { 4Q0@\dR9
temp = data; X|.M9zIx
} x<)%Gs}tb
for (j = 1; j <= r - mid; j++) { nJ/wtw
temp[r - j + 1] = data[j + mid]; F?j;3@z[A
} 4m++>q
int a = temp[l]; COS(pfC
int b = temp[r]; mT N6-V
for (i = l, j = r, k = l; k <= r; k++) { g*UI~rp
if (a < b) { $@_7HE3
data[k] = temp[i++]; 4}{S8fGk%
a = temp; MFHPh8P
} else { `!MyOI`qS
data[k] = temp[j--]; 3Rid1;L0U
b = temp[j]; OHnHSb'?\
} $cO"1mu
} aubmA0w
} <}pwFl8C)
5,:tjn
/** s:Us*i=H,
* @param data yjvH)t/!.
* @param l Hfer\+RX
* @param i ^G63GYh]y
*/ .%+`e
private void insertSort(int[] data, int start, int len) { xG<H${ k;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |(Zv g}c_
} u>;#.N/
} S=O/W(ZB
} RVN"lDGA
} 2,Y8ML<
N"|^AF
堆排序： `Rj<qz^7
mi|O)6>8n
package org.rut.util.algorithm.support; ?{#P.2
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import org.rut.util.algorithm.SortUtil; %hU8ycI*h
7BCCQsz<
/** UTQ$sg|7p
* @author treeroot ~p~8T
* @since 2006-2-2 +3e(psdg
* @version 1.0 ]B>Y +
*/ b?-%Uzp<
public class HeapSort implements SortUtil.Sort{ 5YIiO7@4
'l\V{0;mp
/* (non-Javadoc) ,=lMtW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XgKtg-,
*/ 9bjjo;A
public void sort(int[] data) { @f0~a
MaxHeap h=new MaxHeap(); CAY^ `K!
h.init(data); c1wM"
for(int i=0;i h.remove(); aKaqi}IT
System.arraycopy(h.queue,1,data,0,data.length); ".| 9h
} ,_`\c7@
KdFQlQaj
private static class MaxHeap{ @Z!leyam
[(tgoh/
void init(int[] data){ tklU zv
this.queue=new int[data.length+1]; JGZ,5RTq4-
for(int i=0;i queue[++size]=data; 'j$iSW&
fixUp(size); io cr
} ro37H2^Ty
} xkl'Y*
\Ja%u"DA
private int size=0; ;9c3IK@
oUZwZ_yKW
private int[] queue; ) 0$7{3
4UoUuKzt
public int get() { pRXA!QfO
return queue[1]; W<;i~W
} %Zx/XMs}e
IDzP<u8v
public void remove() { aEX;yy*
SortUtil.swap(queue,1,size--); 1oo'\
fixDown(1); 3P/T`)V
} r4NI(\gU
file://fixdown 5d|*E_yu
private void fixDown(int k) { 7&NRE"?G
int j; e~J% NU'&
while ((j = k << 1) <= size) { q=bJ9iJsq
if (j < size %26amp;%26amp; queue[j] j++; <(d^2-0
if (queue[k]>queue[j]) file://不用交换 5<4njo?k
break; {#q<0l
SortUtil.swap(queue,j,k); .D^k0V
k = j; 2U>1-p&dn
} iUA2/ A
} >;o^qi_$
private void fixUp(int k) { *P:`{ZV7=W
while (k > 1) { [x!T<jJ
int j = k >> 1; ,{itnKJC
if (queue[j]>queue[k]) DcoTa-~
break; 3Q[]lFJ}F
SortUtil.swap(queue,j,k); PK3)M'[
k = j; ?C.C?h6F5B
} 2DTH|Yv
} yt C{,g>
bEbO){Fe
} @Sub.z&T{
F.?:Gd1
} D.qbzJz
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SortUtil： @)VJ,Ql$Y
O:r<es1
package org.rut.util.algorithm; CJjma=XH
/c/!13|
import org.rut.util.algorithm.support.BubbleSort; MnKEZ: 2
import org.rut.util.algorithm.support.HeapSort; jY>KF'y
import org.rut.util.algorithm.support.ImprovedMergeSort; 8<)[+@$0
import org.rut.util.algorithm.support.ImprovedQuickSort; k4pvp5}%
import org.rut.util.algorithm.support.InsertSort; H) q9.Jg
import org.rut.util.algorithm.support.MergeSort; ZH_ J+
import org.rut.util.algorithm.support.QuickSort; ]lQhIf6)k
import org.rut.util.algorithm.support.SelectionSort; '4HwS$mW3
import org.rut.util.algorithm.support.ShellSort; U@D=.6\B
w \0=L=J
/** 9]|[z{v'>l
* @author treeroot HtY\!_Ea
* @since 2006-2-2 XFYCPET
* @version 1.0 :BMUc-[
*/ j@UW[,UI
public class SortUtil { t]eB3)FX
public final static int INSERT = 1; 1ErH \!
public final static int BUBBLE = 2; bL *;N3#E
public final static int SELECTION = 3; k>VP<Zm13
public final static int SHELL = 4; ),bdj+wr78
public final static int QUICK = 5; /J{P8=x}_:
public final static int IMPROVED_QUICK = 6; uHz D
public final static int MERGE = 7; X/5tZ@
public final static int IMPROVED_MERGE = 8; ,X$S4>
public final static int HEAP = 9; yKZ~ ^
X,O&X
public static void sort(int[] data) { R(pvUm&L
sort(data, IMPROVED_QUICK); |[!xLqG
} x"AYt:ewuc
private static String[] name={ v.r$]O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @H&Aj..
}; b^Rg_,s
!6<2JNf
private static Sort[] impl=new Sort[]{ ^N Et{]x
new InsertSort(), ]o,)#/' $
new BubbleSort(), aM?7'8/
new SelectionSort(), '-w G
new ShellSort(), J_rCo4}
new QuickSort(), EF)kYz!@
new ImprovedQuickSort(), c~RElL
new MergeSort(), \FVR'A1
new ImprovedMergeSort(), =\X<UA}
new HeapSort() z_JZx]*/
}; (nBJ,v)
1%EY!14G+
public static String toString(int algorithm){ ?_<ZCH
return name[algorithm-1]; :Oq!.uO
} B TcxBh
~&B_ Bswf
public static void sort(int[] data, int algorithm) { j nI)n*
impl[algorithm-1].sort(data); C6'[Tn
} #"i}wS
dUjdQ
public static interface Sort { Zpu>T2Tp
public void sort(int[] data); ml?+JbLg0
} V7rcnk#
@gxO%@@
public static void swap(int[] data, int i, int j) { V3@^bc!
int temp = data; i>)Whr'e8
data = data[j]; D\*raQ`n
data[j] = temp; ]BAF
} & NOKrN~HX
} <YJU?G:@