[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; z qd1G(tO
} Imo?)dYK
int i1=l; Jf@Xz7{z
int i2=mid+1; a6/ETQ
for(int cur=l;cur<=r;cur++){ !VvM
if(i1==mid+1) ;$4: &T
data[cur]=temp[i2++]; Jd33QL}Hj
else if(i2>r) 5ai$W`6
data[cur]=temp[i1++]; g_"B:DR
else if(temp[i1] data[cur]=temp[i1++]; "m}N hoD4
else 8BnsYy)j
data[cur]=temp[i2++]; G4uOY?0N
} t & 5s.
} H.[(`wi!I
df$pT?o
} tYUo;V
q6P5:@
改进后的归并排序: qp/nWGj
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package org.rut.util.algorithm.support; *+J`Yk7}
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import org.rut.util.algorithm.SortUtil; g}I{-
\YH*x`
/** 1kh()IrA
* @author treeroot Z&GjG6t
* @since 2006-2-2 gZ {
* @version 1.0 Z%VgAV>>
*/ /J&_ZDNV~
public class ImprovedMergeSort implements SortUtil.Sort { LT/*y=
2:6lr4{uY
private static final int THRESHOLD = 10; _2<d6@}
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/* Ntpw(E<$f
* (non-Javadoc) sg_%=;
* 9]a!1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0}$R4<"{Y>
*/ er>@- F7w
public void sort(int[] data) { c+UZ UgP
int[] temp=new int[data.length]; ~fz9PoC
mergeSort(data,temp,0,data.length-1); I -V=Z:
} z*/}rk4i
WAGU|t#."
private void mergeSort(int[] data, int[] temp, int l, int r) { ET~^P
int i, j, k; E,|OMK#
int mid = (l + r) / 2; R^6^{q
if (l == r) K`kWfPwp
return; .wcKG9u
if ((mid - l) >= THRESHOLD) q>VvXUyK,
mergeSort(data, temp, l, mid); 3O?[Yhk`.
else 5Yx 7Q:D
insertSort(data, l, mid - l + 1); }A7]bd
if ((r - mid) > THRESHOLD) Gq.fQ_oOb
mergeSort(data, temp, mid + 1, r); )`<7qT_BM
else L!:;H,
insertSort(data, mid + 1, r - mid); ,Z[pLF
}[ByN).
for (i = l; i <= mid; i++) { p+:MZP -%(
temp = data; o@r~KFIe
} u%nhQ%
for (j = 1; j <= r - mid; j++) { $_ k:{?
temp[r - j + 1] = data[j + mid]; /#e-x|L
} bbFzmS1
int a = temp[l]; j`k:)
int b = temp[r]; 3}i(i0+
for (i = l, j = r, k = l; k <= r; k++) { |`@7G`x
if (a < b) { lD?]D&
data[k] = temp[i++]; UphZRgT!N
a = temp; ":01M},RA
} else { Yr 1k\q
data[k] = temp[j--]; 3xpygx9
b = temp[j]; WI\h@qSB
} Hr=?_Un"
} x7c#kU2A&Z
} #h2 qrX&+
Ny 7vId
/** ^xF-IA#ZeB
* @param data *Q,9 [k
* @param l s^-o_K\*c
* @param i 8"J6(KS
*/ u!I=|1s
private void insertSort(int[] data, int start, int len) { wRQMuFGY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M7\KiQd
} Cq<k(TKAX
} Hr;\}
} X5o{d4R L
} !+ ??3-q
n,%/cUl
堆排序： %CG=mTP
8fQaMn4V
package org.rut.util.algorithm.support; Y j*Y*LB~
9I*`~il>{
import org.rut.util.algorithm.SortUtil; oJVpJA0IA
.Wvg{ S-
/** Eilo;-El
* @author treeroot zirnur1
* @since 2006-2-2 Z}$1~uyw
* @version 1.0 e><,WM,e
*/ 2B=+p83<
public class HeapSort implements SortUtil.Sort{ H.[t&VO
&%`0&y
/* (non-Javadoc) OJPi*i5*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , @dhJ8/
*/ K{]\}7+
public void sort(int[] data) { [35>T3Ku
MaxHeap h=new MaxHeap(); xs$-^FnD
h.init(data); e^Glgaf
for(int i=0;i h.remove(); {DbWk>[DkG
System.arraycopy(h.queue,1,data,0,data.length); NUGiDJ+[
} A7sva@}W
z%Ivc*x5
private static class MaxHeap{ t{Gc,S!]5
6gJc?+
void init(int[] data){ &cB+la\_
this.queue=new int[data.length+1]; +{"w5o<CO
for(int i=0;i queue[++size]=data; PW GNUNc
fixUp(size); BMovl4*5
} E sx`UG|
} 1|xo4fmV
be:=-B7!
private int size=0; 2+qU9[kd|
;@G5s+<l
private int[] queue; u4.2u}A/R%
uy oEMT#u
public int get() { qq[Enf|/y
return queue[1]; n%={!WD
} 1ppU ?#
yu@u0vlc
public void remove() { 5r(Y,m"?
SortUtil.swap(queue,1,size--); geEETb}+y
fixDown(1); ^?o>(K
} 53)*i\9&
file://fixdown k{w
private void fixDown(int k) { \4roM1&[
int j; LQ.0"6oj
while ((j = k << 1) <= size) { `ls^fnJTpf
if (j < size %26amp;%26amp; queue[j] j++; 2)47$eu
if (queue[k]>queue[j]) file://不用交换 'w~e>$WI
break; "IKbb7x
SortUtil.swap(queue,j,k); 1n )&%r
k = j; WiCJhVF3
} -x2&IJ!
} TM^.y Y
private void fixUp(int k) { a&s&6Q|Y
while (k > 1) { UA}N
int j = k >> 1; jv'q:uA^
if (queue[j]>queue[k]) _V_GdQ
break; $>!tpJw
SortUtil.swap(queue,j,k); A<<Bm M.%
k = j; #JW~&;
} |^$?9Dn9.L
} R?H[{AX
R\,qL-Br
} 7)37AKw
+tvWp>T+
} u[?M{E/HU
Xhm)K3RA*T
SortUtil： /dq(Z"O_
4&+lc*
package org.rut.util.algorithm; 1QJB4|5R#
$61j_;WF`
import org.rut.util.algorithm.support.BubbleSort; 35PIfqm
import org.rut.util.algorithm.support.HeapSort; _8'z"wF
import org.rut.util.algorithm.support.ImprovedMergeSort; ]B>g~t5J
import org.rut.util.algorithm.support.ImprovedQuickSort; v"J7VF2
import org.rut.util.algorithm.support.InsertSort; HlC[Nu^6U
import org.rut.util.algorithm.support.MergeSort; D~LU3#n
import org.rut.util.algorithm.support.QuickSort; fs;pX/:FR
import org.rut.util.algorithm.support.SelectionSort; q"|#KT^)
import org.rut.util.algorithm.support.ShellSort; UTph(U#
\YrvH
/** 3}ATt".
* @author treeroot 9G=HG={
* @since 2006-2-2 gq[`g=x
* @version 1.0 unN=yeut
*/ :1,xse
public class SortUtil { Kb,#Ot
public final static int INSERT = 1; 1./iF>*A
public final static int BUBBLE = 2; tX7TP(
public final static int SELECTION = 3; h(MS>=
public final static int SHELL = 4; o]O
public final static int QUICK = 5; sad[(|
public final static int IMPROVED_QUICK = 6; PuoN<9 #
public final static int MERGE = 7; /o]j
public final static int IMPROVED_MERGE = 8; !p$k<?WXc
public final static int HEAP = 9; $3D#U^7i
>C"QV`+
public static void sort(int[] data) { [>wvVv
sort(data, IMPROVED_QUICK); w;(B4^?
} B#Z-kFn@
private static String[] name={ A.@Af+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W9%B9~\G;+
}; PHHX)xK
:MbD=sX
private static Sort[] impl=new Sort[]{ #7yy7Y5
new InsertSort(), 6>Ca O
new BubbleSort(), \jGvom.
new SelectionSort(), @#W$7Gwf0
new ShellSort(), PP_fTacX
new QuickSort(), 1?N$I}?
new ImprovedQuickSort(), IQA<xqX
new MergeSort(), .,7ZDO9{
new ImprovedMergeSort(), 8w]>SEGFs
new HeapSort() rm nfyn
}; 'p:L"L}Q?
h&$,mbEoI
public static String toString(int algorithm){ [*|QA9
return name[algorithm-1]; >h<bYk"9Q
} z3>oUq{
UZ}>@0
public static void sort(int[] data, int algorithm) { i1JWdHt
impl[algorithm-1].sort(data); \NI0rL
} ~A =?_5kJ
[osm\w49
public static interface Sort { 6q]`??g.
public void sort(int[] data); #ZS8}X*S
} "=r"c$xou
O)i]K`jk
public static void swap(int[] data, int i, int j) { T24?1
int temp = data; ?g~g GQV
data = data[j]; 6a\YD{D] _
data[j] = temp; \d)~.2$G*
} K@PQLL#yJp
} =P.m5e<