[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; bF<FX_}!s!
} <-FAF:6$@@
int i1=l; r. :LZEr
int i2=mid+1; +%oXPG?
for(int cur=l;cur<=r;cur++){ ]~GwZB'M
if(i1==mid+1) )}tI8
data[cur]=temp[i2++]; oBpHmMzA
else if(i2>r) 4Y;z46yM%
data[cur]=temp[i1++]; iJT_*,P^
else if(temp[i1] data[cur]=temp[i1++]; '0lX;z1
else j0>Q:hn
data[cur]=temp[i2++]; r_F\]68
} %;~Vc{Xxt/
} n~@;[=o?5
P|l62!m<
} I^emH+!MW
I& DEF*
改进后的归并排序: "sdzm%
Ho2#'lSKM
package org.rut.util.algorithm.support; &Y4S[-
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import org.rut.util.algorithm.SortUtil; **N{XxdN
krFuEaO
/** `O5wM\Z
* @author treeroot ]MKW5Kq
* @since 2006-2-2 XShi[7
* @version 1.0 AAb3Jf`UW
*/ fp^{612O?
public class ImprovedMergeSort implements SortUtil.Sort { &gR)Y3
eVGO6 2|!
private static final int THRESHOLD = 10; jb|al[p\
EyO=M~nsS
/* 5bKM}?=L
* (non-Javadoc) $SQUN*/>
* F0(P2j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >k }ea5+
*/ rO[cm}
public void sort(int[] data) { 9J+p.N
int[] temp=new int[data.length]; ~4fUaMT
mergeSort(data,temp,0,data.length-1); ;SnpD)x@)
} 4YX/=
,1&Pb %}
private void mergeSort(int[] data, int[] temp, int l, int r) { Pqu]?X
int i, j, k; > mk>VM
int mid = (l + r) / 2; mSdByT+dG
if (l == r) :#7"SEud}
return; 6?i]oy^X]p
if ((mid - l) >= THRESHOLD) e ?sMOBPlv
mergeSort(data, temp, l, mid); nvY%{Zf$}
else \MI2^JN
insertSort(data, l, mid - l + 1); j*Uz.q?
if ((r - mid) > THRESHOLD) 69N/_V
mergeSort(data, temp, mid + 1, r); X$BN&DD
else o^+2%S`]
insertSort(data, mid + 1, r - mid); 2@~.FBby7@
![1+=F!
for (i = l; i <= mid; i++) { 'o}v{f
temp = data; P|j|0o,8p
} Cw$0XyO
for (j = 1; j <= r - mid; j++) { n/9.;9b$I
temp[r - j + 1] = data[j + mid]; 1*U)\vK~
} UI2TW)^2
int a = temp[l]; /oL& <e
int b = temp[r]; pW5ch"HE
for (i = l, j = r, k = l; k <= r; k++) { #!?jxfsFa
if (a < b) { H?oBax:
data[k] = temp[i++]; *^aEUp6&
a = temp; h@AKfE!\~
} else { )SU\s+"M
data[k] = temp[j--]; hQ7-m.UZw
b = temp[j]; 4*Uzomb?q
} 4|U$ON?x
} ![3 /!
} 5-*hAOThg
qtrN=c3x
/** nSy{{d
* @param data RISDjU3
* @param l F+@/"1c
* @param i {#`O'F>
*/ Y8v13"P6
private void insertSort(int[] data, int start, int len) { {=I:K|&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }uR[H2D`L
} B_Ul&V
} H2kib4^i
} z][hlDv\j
} =M6Ph%
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堆排序： /aTW X
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package org.rut.util.algorithm.support; Kd r7 V
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import org.rut.util.algorithm.SortUtil; atiyQuT6Wh
h*>%ou
/** 2]of4
* @author treeroot t|PQ4g<
* @since 2006-2-2 ~7=eHU.@
* @version 1.0 yE&WGpT
*/ -.@dA'j[
public class HeapSort implements SortUtil.Sort{ B%7Az!GX
/ f5q9sp8
/* (non-Javadoc) Iip%er%b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dl]pdg<
*/ Y5{KtW
public void sort(int[] data) { I=[Ir8};
MaxHeap h=new MaxHeap(); 9| g]M:{
h.init(data); 'GI| t
for(int i=0;i h.remove(); l*>,K2F
System.arraycopy(h.queue,1,data,0,data.length); s5/u>d
} NiH =T
hv0bs8h
private static class MaxHeap{ 0Ra%>e(I^
&t~NR$@
void init(int[] data){ : E`78
this.queue=new int[data.length+1]; 38GkV.e}$
for(int i=0;i queue[++size]=data; #My14u
fixUp(size); >^6|^rc
} l|81_BC"
} T095]*Hm
^GpLl
private int size=0; UY6aD~tD0
2U|"]tpM&
private int[] queue; 3qW](
B[.$<$}G
public int get() { skm~~JM^
return queue[1]; 1oc@]0n
} GaCRo7
$Ge0<6/
public void remove() { pwH*&YU
SortUtil.swap(queue,1,size--); EQWRfx?d
fixDown(1); <z#.J]
} z]2MR2W@X
file://fixdown Oq^t[X'
private void fixDown(int k) { Z9G4in8
int j; }a!ny
while ((j = k << 1) <= size) { .mHVJ5^:4\
if (j < size %26amp;%26amp; queue[j] j++; enx+,[
if (queue[k]>queue[j]) file://不用交换 tQ*?L
break; ~GE|,Np
SortUtil.swap(queue,j,k); F EUfskv
k = j; AGl#f\_^
} /X]gm\x7s
} s~QIs
private void fixUp(int k) { /Y=_EOS
while (k > 1) { s3Wjhw/
int j = k >> 1; QQ`tSYgex
if (queue[j]>queue[k]) m@Dra2Cv'@
break; o~<jayqU
SortUtil.swap(queue,j,k); D<hX%VJ%M
k = j; TMGYNb%<bX
} ihJ!]#Fbm
} ch2m Ei(
+DG-MM%\
} w\mTug
mGDy3R90
} 8.G<+.
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SortUtil： [+d~He
4{Q$^wD+.
package org.rut.util.algorithm; W__Y^\~
,)uW`7
import org.rut.util.algorithm.support.BubbleSort; g:O/~L0Xb
import org.rut.util.algorithm.support.HeapSort; =0L%<@yA
import org.rut.util.algorithm.support.ImprovedMergeSort; `YUeVz>q?
import org.rut.util.algorithm.support.ImprovedQuickSort; *8Su:=*b
import org.rut.util.algorithm.support.InsertSort; &zd@cr1
import org.rut.util.algorithm.support.MergeSort; [p'A?-
import org.rut.util.algorithm.support.QuickSort; oxBTm|j7
import org.rut.util.algorithm.support.SelectionSort; VX*+:
import org.rut.util.algorithm.support.ShellSort; 9@ 4]t6h[
S}fQis
/** !?R#e`}
* @author treeroot k`o8(zPb
* @since 2006-2-2 :_<&LO]Q
* @version 1.0 H | C3{9
*/ 3dz{"hV
public class SortUtil { a x)J!I18
public final static int INSERT = 1; pTaC$Ne
public final static int BUBBLE = 2; y4! :l=E^
public final static int SELECTION = 3; M,W-,l ]
public final static int SHELL = 4; xQ';$&
public final static int QUICK = 5; MQDLC7Y.p5
public final static int IMPROVED_QUICK = 6; 7O8 @T-f+2
public final static int MERGE = 7; $}IG+,L
public final static int IMPROVED_MERGE = 8; 2 FoLJ
public final static int HEAP = 9; ^62z\Y
_xH<R
public static void sort(int[] data) { QOgGL1)7-
sort(data, IMPROVED_QUICK); r@zs4N0WP
} H "Io!{aKU
private static String[] name={ \crh`~?>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j\wZjc-j
}; p0y|pD
$tF\7.e@
private static Sort[] impl=new Sort[]{ !vSq?!y6*P
new InsertSort(), tAo$;|
new BubbleSort(), C:t?HLY)fG
new SelectionSort(), *|j4>W\J
new ShellSort(), w#hg_RK(Jr
new QuickSort(), k]C k%[d
new ImprovedQuickSort(), +=Q:g,kP
new MergeSort(), ).`v&-cK4E
new ImprovedMergeSort(), BQ<\[H;
new HeapSort() l.]wBH#RS
}; w N`Njm9!
',!jYh}Uxk
public static String toString(int algorithm){ pH.&C 5kA
return name[algorithm-1]; i-;#FT+Xc
} mI{Fs|9h
JWaWOk(t=?
public static void sort(int[] data, int algorithm) { '^C *%"I]
impl[algorithm-1].sort(data); Qe7=6<
} mR1b.$
)A%* l9\nG
public static interface Sort { (]\p'%A)
public void sort(int[] data); TQKcPVlE
} wdf;LM
0>Td4qr+u
public static void swap(int[] data, int i, int j) { N P+vi@Ud
int temp = data; B6;>V`!
data = data[j]; k0N>J8y
data[j] = temp; po'b((q
} ?%su?L
} < qab\M0W