[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; ]){ZL
} )Lz =[e
int i1=l; 9C)VW
int i2=mid+1; s=:)!M.i
for(int cur=l;cur<=r;cur++){ *f 7rLM*
if(i1==mid+1) (-$5YKm
data[cur]=temp[i2++]; B9|s`o)!
else if(i2>r) 4L,wBce;,t
data[cur]=temp[i1++]; CmXLD} L_x
else if(temp[i1] data[cur]=temp[i1++]; v' t'{g%
else *` mxv0w~(
data[cur]=temp[i2++]; ^1~lnD~0
} r^6@Zwox]
} 9ye!kYF,
WyOav6/*K^
} ;:Z5Ft m
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改进后的归并排序: {J)%6eL?
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package org.rut.util.algorithm.support; oUn+tu:
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import org.rut.util.algorithm.SortUtil; cBqbbZyUk
[R1|=kGU
/** IuP~Vt{m
* @author treeroot omg#[
* @since 2006-2-2 [>mH
* @version 1.0 k={1zl ;
*/ md<^x(h"<
public class ImprovedMergeSort implements SortUtil.Sort { q)9n%- YgP
KDb j C'3
private static final int THRESHOLD = 10; qCI7)L`
bvJ@H Z$
/* HI{q#
* (non-Javadoc) VoYL}67c
* 3O;H&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kJl^,q
*/ d+G%\qpzQ
public void sort(int[] data) { )#z{P[X^
int[] temp=new int[data.length]; ]e),#_M
mergeSort(data,temp,0,data.length-1); VqvjOeCbH
} N$e mS
),vDn}>
private void mergeSort(int[] data, int[] temp, int l, int r) { #8M?y*<I
int i, j, k; T8Mqu`$r
int mid = (l + r) / 2; y+k^CT/u
if (l == r) -5
return; Pb;c:HeI/
if ((mid - l) >= THRESHOLD) sQA_6]`
mergeSort(data, temp, l, mid); /d}"s.3p
else @*<0:Q|m
insertSort(data, l, mid - l + 1); Q<u?BA/
if ((r - mid) > THRESHOLD) Y!oLNGY
mergeSort(data, temp, mid + 1, r); tqpO3
else \~A qA!)6
insertSort(data, mid + 1, r - mid); VQqBo~
mrRid}2
for (i = l; i <= mid; i++) { z]rr Q=dAA
temp = data; Lfi6b%/z
} )aGSZ1`/
for (j = 1; j <= r - mid; j++) { 9MfU{4:;I
temp[r - j + 1] = data[j + mid]; l+ >eb
} @kh<b<a4
int a = temp[l]; FfM^2`xP
int b = temp[r]; 2`riI*fQ
for (i = l, j = r, k = l; k <= r; k++) { b9X*2pnWJ
if (a < b) { Dh8'og)7
data[k] = temp[i++]; In_"iEo,
a = temp; T4wk$R L
} else { \\\8{jq
data[k] = temp[j--]; wjl)yo$z
b = temp[j]; DNq(\@x[!
} [s[ZOi!;I
} }ww/e\|Nt=
} ~5&4s
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/** lh'S_p8g
* @param data -JgNujt#9
* @param l L>~Tc
* @param i ,9bnR;f\
*/ 9r]|P}yuS
private void insertSort(int[] data, int start, int len) { 6qZ\^ U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0pMN@Cz6
} -:ucp2
} `5@F'tKQ
} =^u;uS[IW
} c$V5E t
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堆排序： XJe=+_K9
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package org.rut.util.algorithm.support; l{Df{1b.
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import org.rut.util.algorithm.SortUtil; pc*)^S
uTR^K=Ve
/** 0h@FHw2d
* @author treeroot WSHPhhM
* @since 2006-2-2 D8Fi{?A#FV
* @version 1.0 4=tR_s
*/ z/{X{+Z
public class HeapSort implements SortUtil.Sort{ =Hd yra
oa:YAqT
/* (non-Javadoc) )cJ>&g4]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~+dps i
*/ |[>@Kk4
public void sort(int[] data) { e NIzI]~
MaxHeap h=new MaxHeap(); )JS6W
h.init(data); 0y9 b0G
for(int i=0;i h.remove(); U7s$';y"%
System.arraycopy(h.queue,1,data,0,data.length); g5B TZZ
} YqX$a~
&j4pC$Dj
private static class MaxHeap{ v(2N@s<%
-x//@8"
void init(int[] data){ 6CBk=)qH
this.queue=new int[data.length+1]; &-ropY
for(int i=0;i queue[++size]=data; {.:$F3T
fixUp(size); Yb+A{`
} >c,s}HJ
} !K>iSF<
W" 5nS =d%
private int size=0; 7QsD"rL
P"w\hF
private int[] queue; vQEV,d1
-* ,CMw
public int get() { ,S-h~x
return queue[1]; kTvM,<
} X$Vi=fvt
YQ+hQ:4-
public void remove() { PXb$]HV
SortUtil.swap(queue,1,size--); n<ZPWlJ
fixDown(1); {D+mr[ %
} ]O@$}B];)
file://fixdown A]z*#+Sl
private void fixDown(int k) { :?t~|7O:
int j; *T5;dh (
while ((j = k << 1) <= size) { m@4Dz|
if (j < size %26amp;%26amp; queue[j] j++; jJ,_-ui
if (queue[k]>queue[j]) file://不用交换 0t <nH%N}^
break; *pKTJP
SortUtil.swap(queue,j,k); <L&EH@T
k = j; Ed9Uw7
} PVCoXOqh
} Kgbm/L0XR*
private void fixUp(int k) { l:85 _E
while (k > 1) { %$!3Pbui
int j = k >> 1; ;5[KZ8j6Y
if (queue[j]>queue[k]) [,zq
break; ,WT>"9+
SortUtil.swap(queue,j,k); uDF;_bli)H
k = j; *r7vDc
} oaoTd$/5
} Tg\bpLk0=
k:@DK9 "^
} ?e7]U*jEU
.fA*WQ!lb
} 7u):J
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SortUtil： "LMj,qZ1!
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package org.rut.util.algorithm; ?^}30V:E
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import org.rut.util.algorithm.support.BubbleSort; *H>rvE.K?
import org.rut.util.algorithm.support.HeapSort; r"h;JC/&<T
import org.rut.util.algorithm.support.ImprovedMergeSort; wQkM:=t5
import org.rut.util.algorithm.support.ImprovedQuickSort; vvoxK0
import org.rut.util.algorithm.support.InsertSort; t}EMX9SQ
import org.rut.util.algorithm.support.MergeSort; xmW~R*^
import org.rut.util.algorithm.support.QuickSort; pSZ2>^";
import org.rut.util.algorithm.support.SelectionSort; c0!.ei
import org.rut.util.algorithm.support.ShellSort; ?$r`T]>`2
bz>X~
/** }pc9uvmIJ
* @author treeroot 6b|?@
* @since 2006-2-2 eL!41_QI
* @version 1.0 1H)mJVIKkB
*/ 4w4B\Na>l
public class SortUtil { VJh8`PVX
public final static int INSERT = 1; .6B\fr.za
public final static int BUBBLE = 2; :!ya&o
public final static int SELECTION = 3; DSGcxM+
public final static int SHELL = 4; D:)Wr, 26
public final static int QUICK = 5; vW63j't_
public final static int IMPROVED_QUICK = 6; @NHh-&;w
public final static int MERGE = 7; p6VD*PT$&
public final static int IMPROVED_MERGE = 8; lWbu`y
public final static int HEAP = 9; Uv^\[
1v o)]ff
public static void sort(int[] data) { iyskADS
sort(data, IMPROVED_QUICK); f0<zK!
} jvT'N@
private static String[] name={ dWqn7+:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R[WiW RfD
}; S{YzHK
^5mc$~1`
private static Sort[] impl=new Sort[]{ 'J|2c;M\x
new InsertSort(), K*6"c.D
new BubbleSort(), p!.~hw9
new SelectionSort(), _IH" SVub
new ShellSort(), WJ7|0qb
new QuickSort(), U"oNJ8&%|
new ImprovedQuickSort(), ]B8 A
new MergeSort(), QYJ EUC@
new ImprovedMergeSort(), L`NIYH<^
new HeapSort() Tc2.ciU
}; #-hO\ QdC
Iv`IJQH>
public static String toString(int algorithm){ `-NK:;^
return name[algorithm-1]; OvdT* g=8*
} h8rW"8Th
}r}*=;Ea
public static void sort(int[] data, int algorithm) { =TB_|`5;j
impl[algorithm-1].sort(data); qA*~B'
} ^E&PZA\,;
lU WXXuO]
public static interface Sort { a6p0_-MF
public void sort(int[] data); 9hp&HL)BOa
} P<<$o-a"
~^t@TMk$
public static void swap(int[] data, int i, int j) { j0=6B
int temp = data; QV4|f[Ki%
data = data[j]; igO>)XbsM
data[j] = temp; tjdPia
} #A63?kDE&&
} !oLn=