[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; q%/.+g2-\
} 4@a/k[,
int i1=l; J^~J&
int i2=mid+1; $!z.[GL
for(int cur=l;cur<=r;cur++){ `7V1 F.\
if(i1==mid+1) >^<;;8Xh
data[cur]=temp[i2++]; i-dosY`81
else if(i2>r) YX3NZW2i
data[cur]=temp[i1++]; BuC\Bd^0
else if(temp[i1] data[cur]=temp[i1++]; ?"?AH/ED
else r]~]-VZ/
data[cur]=temp[i2++]; s(L!]d.S$y
} As tuM]
} 7W&XcF
#X'su`+
} 3qV\XC+
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改进后的归并排序: ']OT7)_
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package org.rut.util.algorithm.support; uo|:n"v
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import org.rut.util.algorithm.SortUtil; eU]I !pI<
6bf!v
/** ~ySsv
* @author treeroot ZR{YpLFQ
* @since 2006-2-2 Lo}/k}3Sx
* @version 1.0 _Ii=3Qsf
*/ 6D{70onY+
public class ImprovedMergeSort implements SortUtil.Sort { G2|G}#E
, BZ(-M
private static final int THRESHOLD = 10; ,eqRI>,\
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/* Ggv*EsN/cC
* (non-Javadoc) %Z*)<[cIE0
* ;oVOq$ql
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n \&H~0X
*/ wg:\$_Og
public void sort(int[] data) { v9t'CMU
int[] temp=new int[data.length]; PVmePgF
mergeSort(data,temp,0,data.length-1); >.XXB 5a
} x{rjngp2
Ou f\%E<
private void mergeSort(int[] data, int[] temp, int l, int r) { eOZ~p
int i, j, k; C}9|e?R[Rz
int mid = (l + r) / 2; {q;_Dd
if (l == r) ,hT**(W
return; ;2sP3!*
if ((mid - l) >= THRESHOLD) {q~N$"#
mergeSort(data, temp, l, mid); tejpY
else 'Ir
insertSort(data, l, mid - l + 1); mFd|JbW
if ((r - mid) > THRESHOLD) KyqP@ {
mergeSort(data, temp, mid + 1, r); AF{@lDa1h
else RyWfoLc
insertSort(data, mid + 1, r - mid); YnCuF0>
{e., $'#
for (i = l; i <= mid; i++) { !rG-[7K
temp = data; 6eNBldP!
} bp}]'NA
for (j = 1; j <= r - mid; j++) { N5xI;UV9'
temp[r - j + 1] = data[j + mid]; }C~9?Y
} rvb@4-i>iI
int a = temp[l]; |H5$VSw
int b = temp[r]; oj,;9{-
for (i = l, j = r, k = l; k <= r; k++) { Fa#5a'}I
if (a < b) { $lUz!mjG
data[k] = temp[i++]; #wh[F"zX
a = temp; h]VC<BD6S
} else { kpQN>XV#
data[k] = temp[j--]; OE}c$!@
b = temp[j]; ,wyEo>>4)
} r -uu`=,
} D<*)^^
} Q7mikg=1-
I}]UQ4XJ
/** {D[z>I;D
* @param data hN!{/Gc|
* @param l v.gAi6
* @param i :e}j$vF
*/ 7sVO?:bj}
private void insertSort(int[] data, int start, int len) { P(LiH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0]GenT"
} y'^b{q@
} /<o?T{z<-
} FJW,G20L
} R+Ug;r-[
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堆排序： m*KI'~#$%
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package org.rut.util.algorithm.support; %F:; A
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import org.rut.util.algorithm.SortUtil; fA),^
,V;HMF.
/** Jl$ X3wE
* @author treeroot A 0;ng2&
* @since 2006-2-2 e_1L J
* @version 1.0 w3ZOCWJS
*/ 5<7sVd.
public class HeapSort implements SortUtil.Sort{ @ xTVX'$
wV4MP1c$
/* (non-Javadoc) Nfmr5MU_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TEC#owz
*/ vJb/.)gh]
public void sort(int[] data) { j`MK\*qmz
MaxHeap h=new MaxHeap(); [Z!oVSCZD%
h.init(data); +9#qNkP
for(int i=0;i h.remove(); W"tGCnd
System.arraycopy(h.queue,1,data,0,data.length); #smfOGSd
} 58o&Dv6?
U.N&~S
private static class MaxHeap{ Xl>ZnI];
-L wz T
void init(int[] data){ +.xK`_[M
this.queue=new int[data.length+1]; Lu4>C2{
for(int i=0;i queue[++size]=data; $3eoZ1q'U-
fixUp(size); bPuO~#iN~
} c/Li,9cT'
} Zk31|dL
Bc<pD?uOK
private int size=0; ?07}\N0~
q'uGB fE.
private int[] queue; 9LOq*0L_:
hF5(1s}e$
public int get() { LK>;\BRe?
return queue[1]; &Cr4<V6-q
} 7(<r4{1?
_k(&<1i
public void remove() { ]?Q<lMG
SortUtil.swap(queue,1,size--); >g{b'Xx
fixDown(1); /!*=*
} pLMaXX~4_
file://fixdown LQ||7>{eX
private void fixDown(int k) { )C rsm&
int j; [?2,(X0yh1
while ((j = k << 1) <= size) { KfQR(e9n
if (j < size %26amp;%26amp; queue[j] j++; $JiypX^DOP
if (queue[k]>queue[j]) file://不用交换 ]y"=/Nu-Ja
break; .P ??N
SortUtil.swap(queue,j,k); 8,&Y\b`..
k = j; bb-u'"5^]
} O! _d5r&,
} Z,8t!Y
private void fixUp(int k) { *lQa^F
while (k > 1) { A}_pJH
int j = k >> 1; pxW*kS
if (queue[j]>queue[k]) R pT7Nr
break; @Z<Z//^k
SortUtil.swap(queue,j,k); XS.*CB_m_
k = j; vr_Z0]4`C9
} bP4}a!t+n
} 4"\%/kG
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} D4~]:@v~n
v8C4BuwA
} {~XnmBs
"h8fTB\7S\
SortUtil： }?sC1]-j&
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package org.rut.util.algorithm; y43ha
Au:R]7
import org.rut.util.algorithm.support.BubbleSort; zA/Fh(uX
import org.rut.util.algorithm.support.HeapSort; $\PU Y8
import org.rut.util.algorithm.support.ImprovedMergeSort; \(r$f!`
import org.rut.util.algorithm.support.ImprovedQuickSort; ;{v2s;
import org.rut.util.algorithm.support.InsertSort; #J
import org.rut.util.algorithm.support.MergeSort; *<X*)A{C
import org.rut.util.algorithm.support.QuickSort; |n~,{=
import org.rut.util.algorithm.support.SelectionSort; Mu6DTp~k
import org.rut.util.algorithm.support.ShellSort; >G As&\4hs
9q\_UbF
/** CW]Th-xc
* @author treeroot >qd=lm <,
* @since 2006-2-2 buhbUmQ2
* @version 1.0 Q&/WVRD
*/ i4&V+h"
public class SortUtil { R'fEw3^
public final static int INSERT = 1; Ns5P,[pBOZ
public final static int BUBBLE = 2; -x|!?u5F
public final static int SELECTION = 3; s5)y%,E
public final static int SHELL = 4; %N0m$*
public final static int QUICK = 5; dAy\IfZX=
public final static int IMPROVED_QUICK = 6; M;YJpi
public final static int MERGE = 7; 32`Z3-
public final static int IMPROVED_MERGE = 8; WADEDl&,'
public final static int HEAP = 9; R]0`-_T
J5Ti@(G5V
public static void sort(int[] data) { FOjX,@x&
sort(data, IMPROVED_QUICK); n+nZ;GJ5d
} iU(B#ohW"
private static String[] name={ j-ob7(v)*]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qraa0]56
}; PX`xr1o
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private static Sort[] impl=new Sort[]{ s-~`Ao' <
new InsertSort(), DgB;6Wl
new BubbleSort(), _/Ay$l;F
new SelectionSort(), `g0^W/j
new ShellSort(), k(_OhV_
new QuickSort(), \r [@A3O
new ImprovedQuickSort(), 7OS i2
new MergeSort(), 08! _B\
new ImprovedMergeSort(), 4&v&XLkb
new HeapSort() f>3)}9?xc}
}; n^*,JL9@
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public static String toString(int algorithm){ B![:fiR`
return name[algorithm-1]; {SD%{
} [a?bv7Kz
A;o({9VH`Z
public static void sort(int[] data, int algorithm) { Ge^,hAM'
impl[algorithm-1].sort(data); ~ H/ZiBL@
} *kcc]*6@s
6~x a^3G:
public static interface Sort { tD4-Llj6
public void sort(int[] data); I&<'A[vHl
} @.`k2lxGd~
'(g;nU<
public static void swap(int[] data, int i, int j) { m_,Jbf
int temp = data; cvhwd\
data = data[j]; kp#XpcS
data[j] = temp; yB 'C9wEH
} +wQ}ZP&
} 2b-g`60<