[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; gP^2GnjHL8
} Dg&84,bv^
int i1=l; #6`5-5Ks;
int i2=mid+1; P3M$&::D-
for(int cur=l;cur<=r;cur++){ 6{Wo5O{!\
if(i1==mid+1) f:c'j`
data[cur]=temp[i2++]; aSL`yuXu
else if(i2>r) 1+l8%G=hB
data[cur]=temp[i1++]; rIyH/=;
else if(temp[i1] data[cur]=temp[i1++]; Hbm 4oYN
else _;lw,;ftA
data[cur]=temp[i2++]; $( hT{C,K
} $] 6u#5
} lj4Fg*/Yn
Zt=|q$"
} Q&9yrx.
)uPJ? 2S9
改进后的归并排序: S-Uod y
NBikYxa
package org.rut.util.algorithm.support; .~z'm$s1o
9shfy4?k
import org.rut.util.algorithm.SortUtil; gI+8J.AG=
FG?Mc'r&
/** fi+}hGj(r
* @author treeroot .[|UNg
* @since 2006-2-2 0|3I^b
* @version 1.0 &|yLTx
*/ IwYeKN6s
public class ImprovedMergeSort implements SortUtil.Sort { {#,<)wFV\
}^"6:;,
private static final int THRESHOLD = 10; .;#T<S"
M`MxdwR
/* c-LzluWi
* (non-Javadoc) d2\!tJm
* Ni$'# W?t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Epzg|L1)
*/ fFQ|dE;cF
public void sort(int[] data) { TlG>)Z@/
int[] temp=new int[data.length]; b#j:)PA0C
mergeSort(data,temp,0,data.length-1); 2HbnE&
} Di9RRHn&q
"c^!LV
private void mergeSort(int[] data, int[] temp, int l, int r) { nt.LiM/L
int i, j, k; QX,$JM3
int mid = (l + r) / 2; kZ]H[\Fs
if (l == r) GP:<h@:798
return; =BJLj0=N
if ((mid - l) >= THRESHOLD) %sa?/pjK
mergeSort(data, temp, l, mid); j"W>fC/u
else +UzQJt/>>
insertSort(data, l, mid - l + 1); W4^L_p>Tm^
if ((r - mid) > THRESHOLD) 6FS%9.Ws
mergeSort(data, temp, mid + 1, r); kY0HP a
else $|4@Zx4vf
insertSort(data, mid + 1, r - mid); [W[{ 4 Xu
bS_#3T
for (i = l; i <= mid; i++) { ~.a"jYb7A}
temp = data; (vXr2Z<l
} Sp`l>BL
for (j = 1; j <= r - mid; j++) { FO{=^I5YA
temp[r - j + 1] = data[j + mid]; 1 ZdB6U0
} %6K7uvTq
int a = temp[l]; $l.*;h*
int b = temp[r]; qwTz7r
for (i = l, j = r, k = l; k <= r; k++) { r]B8\5|<d
if (a < b) { 2y[Q
data[k] = temp[i++]; 0G%9 @^B
a = temp; s!6lZ mPM
} else { n#_B4UqW%
data[k] = temp[j--]; u{1R=ML
b = temp[j]; "ra$x2|=}
} 9QZaa(vN
} lu utyK!
} qF)J#$4;6
UQVL)-Z
/** :e1h!G
* @param data pEyZH!W
* @param l I&PJ[U#~a
* @param i )f8>kz(
*/ h]7_ N,
private void insertSort(int[] data, int start, int len) { y\Wn:RR1[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2+]5}'M
} ,EqQU|
} *v<f#hB"
} kk4 |4
} #G9 W65f
sz7*x{E
堆排序： kc'$4 J4Tw
%VHy?!/
package org.rut.util.algorithm.support; (leX` SN0u
Iix,}kzss
import org.rut.util.algorithm.SortUtil; r&=ulg
,BdObx
/** ct+F\:e
* @author treeroot $QbJT`,mr
* @since 2006-2-2 W'G|sk
* @version 1.0 d_[H|H9i6
*/ 1(' wg!
public class HeapSort implements SortUtil.Sort{ `Fqth^RK?p
G':3U
/* (non-Javadoc) 5Ds[?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [@$ SLl^Y
*/ ]:%DDlRb
public void sort(int[] data) { ?G{0{c2
MaxHeap h=new MaxHeap(); q~`hn(S
h.init(data); 2mY!gVi
for(int i=0;i h.remove(); <^S\&v1C_
System.arraycopy(h.queue,1,data,0,data.length); Bc>j5^)8w
} y6 (L=$+B
4[ uqsJB
private static class MaxHeap{ e=]SIR()`
|mT%IR
void init(int[] data){ =4TQ*;V:
this.queue=new int[data.length+1]; hY}Q|-|
for(int i=0;i queue[++size]=data; M1jT+
fixUp(size); kD#T_d
} VoCg,gow
} 'h$:~C
&X4anH>O
private int size=0; @52#ZWy
w4 yrAj 2
private int[] queue; S2X@t>u-
cXXZ'y>FP
public int get() { -"-.Z&#
return queue[1]; ,fjY|ip
} Va!G4_OT
^[hAj>7_8$
public void remove() { =OufafZb
SortUtil.swap(queue,1,size--); Iv6 lE:)
fixDown(1); FDoPW~+[
} U~ X
file://fixdown ._+cvXy
private void fixDown(int k) { DJGafX^
int j; 9.)z]Gav
while ((j = k << 1) <= size) { !vX4_!%
if (j < size %26amp;%26amp; queue[j] j++; ~EtGR # N
if (queue[k]>queue[j]) file://不用交换 v^A+LZ*d
break; QQ?t^ptv
SortUtil.swap(queue,j,k); Y9BQLu4F
k = j; 8W3zrnc
} 5OM#_.p
} le*+(aw
private void fixUp(int k) { :N8n6)#1=
while (k > 1) { d` GN!^
int j = k >> 1; <B@NSj
if (queue[j]>queue[k]) F .S^KK
break; F:/x7]7??Z
SortUtil.swap(queue,j,k); ?NBae\6r
k = j; !7t&d
} bQD8#Ml1
} zw#n85=
=r]l"T
} Xg~9<BGsi
stiF`l
} 81nD:]7
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SortUtil： j_C"O,WS
Nuqmp7C
package org.rut.util.algorithm; eA N{BPN[
c0wLc,)G
import org.rut.util.algorithm.support.BubbleSort; !'_7MM
import org.rut.util.algorithm.support.HeapSort; !B`z|#
import org.rut.util.algorithm.support.ImprovedMergeSort; F{mUxo#T
import org.rut.util.algorithm.support.ImprovedQuickSort; 8#!g;`~ D
import org.rut.util.algorithm.support.InsertSort; A%#M#hD/
import org.rut.util.algorithm.support.MergeSort; sOqFEvzo1%
import org.rut.util.algorithm.support.QuickSort; ^i@anbH
import org.rut.util.algorithm.support.SelectionSort; S(@kdL
import org.rut.util.algorithm.support.ShellSort; = #-zK:4
Y" =8wNbr
/** 97Dq;
* @author treeroot *VsGa<V
* @since 2006-2-2 ,X!)zAmm
* @version 1.0 aiPm.h>
*/ YCRE-5!
public class SortUtil { y`9#zYgqA
public final static int INSERT = 1; zS:2?VXxq
public final static int BUBBLE = 2; ]9_gbQ
public final static int SELECTION = 3; eipg,EI
public final static int SHELL = 4; +-tFgXG
public final static int QUICK = 5; pW+uVv,
public final static int IMPROVED_QUICK = 6; { <Gyjq
public final static int MERGE = 7; ;PaU"z+Je~
public final static int IMPROVED_MERGE = 8; D%+yp
public final static int HEAP = 9; FS}b9sQ)
}etdXO_^
public static void sort(int[] data) { +iQ@J+k
sort(data, IMPROVED_QUICK); k, N{
} F]M-r{
private static String[] name={ t]I9[5Pq\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kqX=3Zo
}; *zUK3&n~I
?OW!D?
private static Sort[] impl=new Sort[]{ g}!{_z
new InsertSort(), \me5"ZU
new BubbleSort(), -]wEk%j
new SelectionSort(), )l9KDObis
new ShellSort(), ECt<\h7}
new QuickSort(), OPN\{<`*d
new ImprovedQuickSort(), kNK0KL
new MergeSort(), =F|9ac9X
new ImprovedMergeSort(), 5Pf=Uj6D
new HeapSort() o2dO\$'
}; 7;+G)44
Hc\C0V<
public static String toString(int algorithm){ UYxn?W.g
return name[algorithm-1]; SY|K9$M^
} z&QfZs
o/3.U=px~
public static void sort(int[] data, int algorithm) { [.4{s
impl[algorithm-1].sort(data); e1g3a1tnWl
} /4O))}TX
fY^CIb$Y
public static interface Sort { M(L6PyEa!Y
public void sort(int[] data); # bHkI~
} !p$p 7
_<RTes
public static void swap(int[] data, int i, int j) { #OPEYJ;*9d
int temp = data; WzstO}?P(
data = data[j]; p-IJ':W
data[j] = temp; dwk%!%
} tC|?Kl7
} i.'"`pn_