[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; Y 4U $?%j
} .*Z]0~ &|
int i1=l; .IqS}Rh
int i2=mid+1; nsPM`dz/
for(int cur=l;cur<=r;cur++){ {_Y\Y&#
if(i1==mid+1) \,WPFV
data[cur]=temp[i2++]; cG<?AR?wDT
else if(i2>r) GZ1>]HB>r^
data[cur]=temp[i1++]; ^%nAx| 4xQ
else if(temp[i1] data[cur]=temp[i1++]; IpWl;i`__
else q#Bdq8
data[cur]=temp[i2++]; W<2-Q,>Y
} fu`oDi
} QxK%ZaFZA
*(rq AB0~
} SF6n06UZu
@!S5FOXipZ
改进后的归并排序: |qBo*OcO
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package org.rut.util.algorithm.support; K \O,AE
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import org.rut.util.algorithm.SortUtil; uJ[dO}
\Tc$P#
/** :KQ<rLd
* @author treeroot uwbj`lpf
* @since 2006-2-2 oyUf/Sl
* @version 1.0 6|zA,-=
*/ qU"+0t4
public class ImprovedMergeSort implements SortUtil.Sort { d-Sm<XHu.
76 y}1aa
private static final int THRESHOLD = 10; c9Cp!.#*E
&0 @2JS/!
/* 51~:t[N|
* (non-Javadoc) @~"0|,6VC
* /as1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d+_qBp
*/ yJ^}uw
public void sort(int[] data) { }{[F+|\>,e
int[] temp=new int[data.length]; P%1s6fjU
mergeSort(data,temp,0,data.length-1); xHf l>C'
} noacnQ_I$
L"IdD5`7T
private void mergeSort(int[] data, int[] temp, int l, int r) { rn(T Z}
int i, j, k; E]68IuP@'
int mid = (l + r) / 2; s>kzt1,x
if (l == r) \=.iM?T
return; !nTq"d%(W
if ((mid - l) >= THRESHOLD) W<~(ieu:K~
mergeSort(data, temp, l, mid); 6`4=!ZfI
else j}y"
insertSort(data, l, mid - l + 1); V< J~:b1V
if ((r - mid) > THRESHOLD) k}/0B
mergeSort(data, temp, mid + 1, r); ,ujoGSx}
else lOVsp#
insertSort(data, mid + 1, r - mid); %zWtPxAf
rwU[dqBRhc
for (i = l; i <= mid; i++) { =!Ok079{[
temp = data; U5" C"+ 3
} / JlUqC
for (j = 1; j <= r - mid; j++) { =|H/[",gg
temp[r - j + 1] = data[j + mid]; $} ~:x_[
} eOS#@6U=u
int a = temp[l]; N/Z<v* i"
int b = temp[r]; mp}ZHufG
for (i = l, j = r, k = l; k <= r; k++) { !.9NJ2'8
if (a < b) { u{HB5QqK
data[k] = temp[i++]; daaurT
a = temp; O4 [[9
} else { *vht</?J
data[k] = temp[j--]; Ur_~yX]Mo
b = temp[j]; m+CvU?)gJ
} [N{Rd[{QTL
} z55P~p
} H1+G:TM
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/** kFeuKSa^d
* @param data hMdsR,Iq
* @param l OD{Rh(Id
* @param i h"j{B
*/ 1SQ&mH/
private void insertSort(int[] data, int start, int len) { U)N;=gr\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rNdap*.
} B+,Z 3*
} 41$7P[M;
} [9X1;bO#f
} mim]nRd2v
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堆排序： gwNv;g
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package org.rut.util.algorithm.support; xCGvLvFn
k}~|jLu@g
import org.rut.util.algorithm.SortUtil; f~9ADb
@va6,^)
/** 7|*|xLrVY
* @author treeroot ]^R;3kU4Q
* @since 2006-2-2 Jgb{Tl:r
* @version 1.0 '\P6NszY~
*/ VDBP]LRF
public class HeapSort implements SortUtil.Sort{ *joM[ML` 6
iN<Tn8-YH6
/* (non-Javadoc) a>6!?:Rj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *SLv$A
*/ 5s`NR<|2L
public void sort(int[] data) { @32JMS<
MaxHeap h=new MaxHeap(); yPKeatH]
h.init(data); g?)9zJ9
for(int i=0;i h.remove(); >tYptRP
System.arraycopy(h.queue,1,data,0,data.length); YEQ}<\B\&
} [ q22?kT
y1B3F5
private static class MaxHeap{ J1hc :I<;
*o`bBdZ
void init(int[] data){ Jk 0;<2j
this.queue=new int[data.length+1]; ^I@43Jy/
for(int i=0;i queue[++size]=data; [{L4~(uU8
fixUp(size); %3|0_
} !Hxx6/
} P'R!" #
7C F-?M!
private int size=0; ?FxxH*>"
M5CFW >T
private int[] queue; (ybKACx
5l}v
public int get() { PohG y
return queue[1]; ?=$a6o
} ,_D`0B6o
%TP0i#J
public void remove() { <T,vIXwu+
SortUtil.swap(queue,1,size--); kO+Y5z6=
fixDown(1); 8 W79
} zvL;.U
file://fixdown ]`b/_LJN$F
private void fixDown(int k) { M1-n
int j; Y7{IF X
while ((j = k << 1) <= size) { K]1A,Q
if (j < size %26amp;%26amp; queue[j] j++; mY+Jju1
if (queue[k]>queue[j]) file://不用交换 km|;T!
break; ] K3^0S/
SortUtil.swap(queue,j,k); /q0[T{Wz$
k = j; M|w;7P}
} ]%!:'#
} M| :wC
private void fixUp(int k) { _Y?p =;
while (k > 1) { KC[ql}JP
int j = k >> 1; qk<(iVUO
if (queue[j]>queue[k]) kFg@|#0v9
break; gG!L#J?
SortUtil.swap(queue,j,k); c_"]AhV~Mg
k = j; 9LI#&\lba
} |7LhE+E
} .Ks%ar
L'iENZI$
} @G@,)`p4?
J^m#984
} G~5EAeG
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SortUtil： .B_LQ;0:
jdqVS@SD
package org.rut.util.algorithm; UzTFT:\
0K<y }
import org.rut.util.algorithm.support.BubbleSort; {OtD+%
import org.rut.util.algorithm.support.HeapSort; ?Z9C}t]
import org.rut.util.algorithm.support.ImprovedMergeSort; _bRd2k,
import org.rut.util.algorithm.support.ImprovedQuickSort; DO` K_B
import org.rut.util.algorithm.support.InsertSort; ^K. d|z
import org.rut.util.algorithm.support.MergeSort; XHKiz2Pc1
import org.rut.util.algorithm.support.QuickSort; j")#"& m
import org.rut.util.algorithm.support.SelectionSort; I]+xerVd
import org.rut.util.algorithm.support.ShellSort; Wn6~x2LaV
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/** 6O"?wN%$
* @author treeroot |Ii[WfFA|J
* @since 2006-2-2 Aru=f~!
* @version 1.0 FOV%\=Hl
*/ C-O~Oil
public class SortUtil { <#/r.}.x
public final static int INSERT = 1; (&t741DN|
public final static int BUBBLE = 2; #;~`+[y?\
public final static int SELECTION = 3; ?-C=_eZJ
public final static int SHELL = 4; g?&_5)&
public final static int QUICK = 5; 1?%Q"*Y&
public final static int IMPROVED_QUICK = 6; ;n]GHqzY_
public final static int MERGE = 7; 5-qk"@E W
public final static int IMPROVED_MERGE = 8; v<CZ.-r\j
public final static int HEAP = 9; Zq1ZrwPF
B?n 6o|8
public static void sort(int[] data) { {| ~
sort(data, IMPROVED_QUICK); Kcf1$`F24
} J< Ljg<t+
private static String[] name={ *9Ta0e*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IC"lsNq52
}; r:;nv D
2MY-9(no
private static Sort[] impl=new Sort[]{ F/O5Z?C?
new InsertSort(), &BTgISYi
new BubbleSort(), i82sMN1jl7
new SelectionSort(), 9BR/zQ2
new ShellSort(), R. :~e
new QuickSort(), $.HZz
new ImprovedQuickSort(), ,'!x9 `
new MergeSort(), Rn?Yz^ 1q
new ImprovedMergeSort(), 3lr9nBR
new HeapSort() u*}[fQ`aF
}; ]6s7?07m4
8.JFQ/)i
public static String toString(int algorithm){ $[(amj-;l
return name[algorithm-1]; 'C[{cr.`
} eV(nexE
[u*-~(
public static void sort(int[] data, int algorithm) { 0ndk=V
impl[algorithm-1].sort(data); Hreu3N
} Yx#?lA2gx
im,H|u_f4
public static interface Sort { n$Nb,/o
public void sort(int[] data); 9d kuvk}:
} <e&88{jJ
''D\E6c\
public static void swap(int[] data, int i, int j) { yBKEw(1
int temp = data; s|HpN
data = data[j]; lB)%s~P:s
data[j] = temp; +9gI^Gt
} =bKz$ _W
} XS#Jy n