[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; Ptcq/f
} fmJK+
int i1=l; cr|]\
int i2=mid+1; CU*TY1%
for(int cur=l;cur<=r;cur++){ t)uxW 7
if(i1==mid+1) &5.J y2hO]
data[cur]=temp[i2++]; 3,`M\#z%K
else if(i2>r) +0j{$MPZ
data[cur]=temp[i1++]; Zy.A9Bh~
else if(temp[i1] data[cur]=temp[i1++]; 8)1=5n
else wt;`_}g
data[cur]=temp[i2++]; N-t"CBTO
} N=7iQ@{1
} ]N;nq
mq:WBSsV
} +IWf~|s
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改进后的归并排序: dG8mE&$g
c5uC?b].
package org.rut.util.algorithm.support; 6k![v@2R
O*bzp-6\
import org.rut.util.algorithm.SortUtil; 5`$!s17
RZKx!X4=q
/** s$,G5Feub
* @author treeroot D(TG)X?
* @since 2006-2-2 2+?W{yAEi
* @version 1.0 *M*WjEOA
*/ {\NBNg(Vo
public class ImprovedMergeSort implements SortUtil.Sort { <}h<By)
tN_=&|{WE4
private static final int THRESHOLD = 10; $}0!dR2
2y|n!p T
/* xIW]e1pu=(
* (non-Javadoc) <Rs$d0/
* fI2y(p{?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n~BQq-1
*/ SIKaDIZ
public void sort(int[] data) { w{lj'3z I
int[] temp=new int[data.length]; :-lq Yd5^
mergeSort(data,temp,0,data.length-1); Oo-4WqRJ
} $tXW/
l_$>$d
private void mergeSort(int[] data, int[] temp, int l, int r) { UjLq[,_!
int i, j, k; BOR$R}q
int mid = (l + r) / 2; g kV`ZT9
if (l == r) K"|~D0Qgo
return; #_`p 0wY
if ((mid - l) >= THRESHOLD) ^$C&{%
mergeSort(data, temp, l, mid); NFtA2EMLu[
else MK@rx6<9
insertSort(data, l, mid - l + 1); jJNl{nyq
if ((r - mid) > THRESHOLD) 3TLym&
mergeSort(data, temp, mid + 1, r); J]zhwM
else @o*~\E<T
insertSort(data, mid + 1, r - mid); M(:bM1AD`u
9Iq<*\V 4
for (i = l; i <= mid; i++) { +'iqGg-
temp = data; $aB`A$'hK
} \kf n,m
for (j = 1; j <= r - mid; j++) { FV7'3fIa
temp[r - j + 1] = data[j + mid]; -!mtLaLw
} KKb7dZbt<
int a = temp[l]; zY@0R`{@p
int b = temp[r]; nk_X_y
for (i = l, j = r, k = l; k <= r; k++) { .Ln98#ZR
if (a < b) { 64'QTF{D
data[k] = temp[i++]; =qoOr~
a = temp; ;($xAAR
} else { 9z{g3m70@
data[k] = temp[j--]; tS5J{j>T
b = temp[j]; ZR%$f-
} /ueOc<[8"
} (UhJ Pco"
} Q9h=1G\K
5} <OB-9
/** 0_-o]BY
* @param data ZZwIB3sNhf
* @param l zBwqIJfM
* @param i u|.|dv'mbp
*/ :xq{\"r
private void insertSort(int[] data, int start, int len) { "VHT5k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,quUGS
} BFP@Yn~k
} {oF;ZM'r
} Vr"'O6
} ^+-]V9?+
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堆排序： _ W#Km
&iq'V*+-\
package org.rut.util.algorithm.support; 3djw
trjeGSt&
import org.rut.util.algorithm.SortUtil; 0S4Y3bac&
n[qnrk*3 %
/** @jjxgd'%&
* @author treeroot 92R,o'#
* @since 2006-2-2 F7w\ctUP
* @version 1.0 OC-d5P
*/ wu11)HFL|z
public class HeapSort implements SortUtil.Sort{ uOKD#
bG*l_
/* (non-Javadoc) ?/5<}W#7}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xluAjOQ6
*/ hVT>HER
public void sort(int[] data) { $FIJI^Kd7
MaxHeap h=new MaxHeap(); 1M?x,N_W
h.init(data); PY4a3dp U
for(int i=0;i h.remove(); {iq^CHAVK
System.arraycopy(h.queue,1,data,0,data.length); 1:M'|uc
} pFiE2V_aS
bF*Kb"!CF
private static class MaxHeap{ xC=$ym]
$G}k'[4C
void init(int[] data){ z#|Auc0
this.queue=new int[data.length+1]; lX/7
for(int i=0;i queue[++size]=data; W!kF(O NA
fixUp(size); .YH#+T'
} {|j-e{*
} $AvaOI.l
p`Tl)[*
private int size=0; Y#-c<o}f
OVgak>$
private int[] queue; EG &me
\>EUa}%xn
public int get() { P,F5Hf
return queue[1]; F.(e}EMyNh
} n!~QC
0R+p\Nc&1
public void remove() { wt'"<UN
SortUtil.swap(queue,1,size--); ){u# (sW
fixDown(1); j5[>HL
} 1rue+GL
file://fixdown CN-4FI)1D9
private void fixDown(int k) { ;Z;` BGZJ
int j; cFJZ|Ld
while ((j = k << 1) <= size) { rW~G'
if (j < size %26amp;%26amp; queue[j] j++; ,If"4C!w
if (queue[k]>queue[j]) file://不用交换 BVH)!]m0
break; qX6zk0I a
SortUtil.swap(queue,j,k); VC Ay~,
k = j; tBwPB#:W
} DAtAc(05)
} wa&:86~l?
private void fixUp(int k) { -cZuP7oA
while (k > 1) { z5<&}Vh;P
int j = k >> 1; (5y*Btd=
if (queue[j]>queue[k]) A]o3MoSt
break; 8F)9.s,*
SortUtil.swap(queue,j,k); {\VsM#K6
k = j; YY7dw:>e/
} \MmB+'f&R
} ygQAA!&']
cZrJW
} 4IM&#_6
+, rm
} v] Xy^7?
n4"xVDL
SortUtil： h4ghMBo%
AI9=?X<kh
package org.rut.util.algorithm; -A:'D8o#f
Kl(u~/=6
import org.rut.util.algorithm.support.BubbleSort; ~aL?{kb+
import org.rut.util.algorithm.support.HeapSort; Hb^ovc0
import org.rut.util.algorithm.support.ImprovedMergeSort; mryT%zSlM
import org.rut.util.algorithm.support.ImprovedQuickSort; abEdZ)$
import org.rut.util.algorithm.support.InsertSort; z!~{3M
import org.rut.util.algorithm.support.MergeSort; ,>TDxI;
import org.rut.util.algorithm.support.QuickSort; `sRys oW
import org.rut.util.algorithm.support.SelectionSort; Q2@yUDd!
import org.rut.util.algorithm.support.ShellSort; q^@*k,HG
{w99~?
/** ,? &$c+
* @author treeroot 1ahb:Mjv
* @since 2006-2-2 XFww|SG$
* @version 1.0 $uK[[k~=S
*/ &,]yqG 2
public class SortUtil { Aj>
public final static int INSERT = 1; )hK;27m4
public final static int BUBBLE = 2; UC00zW<Z@"
public final static int SELECTION = 3; 3+M+5
public final static int SHELL = 4; i.ivHV~-
public final static int QUICK = 5; !#WJ(zSq
public final static int IMPROVED_QUICK = 6; X%B2xQM5
public final static int MERGE = 7; =A"z.KfV
public final static int IMPROVED_MERGE = 8; jwwst\f
public final static int HEAP = 9; eN<?rVZl
Mt121Q&"
public static void sort(int[] data) { |qq29dS?
sort(data, IMPROVED_QUICK); {UhpN"'"n
} %8|?YxiZ:
private static String[] name={ Az(J@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /"1[qT\F
}; `M_w^&6+n
%9t=Iu*
private static Sort[] impl=new Sort[]{ .8CfCRq
new InsertSort(), q&wv{
new BubbleSort(), |q_Hiap#a
new SelectionSort(), 7{f{SIB
new ShellSort(), 6~8dMy;w
new QuickSort(), }iB>3|\
new ImprovedQuickSort(), 1|3vwgRhs
new MergeSort(), l-[5Zl;"
new ImprovedMergeSort(), _eaK:EW
new HeapSort() ? ~_h3bHH
}; 7)Bizlf
'[[*(4a3
public static String toString(int algorithm){ v,c:cKj
return name[algorithm-1]; d1d:5b
} 2fdC @V
lMXLd91
public static void sort(int[] data, int algorithm) { 4({Wipd
impl[algorithm-1].sort(data); 9 J~KM=p
} BH?fFe&J:`
&-`a`
public static interface Sort { \MmKz^tO
public void sort(int[] data); J`A )WsKkb
} AjO|@6
&vS@-K
public static void swap(int[] data, int i, int j) { `[.4SIah
int temp = data; lO^YAOY
data = data[j]; 0]t7(P"F6
data[j] = temp; T9Pu V
} -gLU>I7wV
} .?-]+-J?`