[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'YWomfZm
} ,;$OaJFT
int i1=l; p F-Lz<V
int i2=mid+1; 1q6)R/P
for(int cur=l;cur<=r;cur++){ vK',!1]y
if(i1==mid+1) H;/do-W[
data[cur]=temp[i2++]; Mog>W&U
else if(i2>r) [,o:nry'a
data[cur]=temp[i1++]; ,Z q:na
else if(temp[i1] data[cur]=temp[i1++]; R}nvSerVb
else 0*gvHVd/l
data[cur]=temp[i2++]; r9[S%Def
} Z`Y&cKsn
} ,md_eGF
!eW1d0n'+f
} K:,V>DL
xfYKUOp/
改进后的归并排序: PkvW6,lS
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package org.rut.util.algorithm.support; >y3FU1w5d
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import org.rut.util.algorithm.SortUtil; ingG
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/** =zkN63S
* @author treeroot \ruQx)5M
* @since 2006-2-2 Aa ~W,
* @version 1.0 (95|DCL
*/ #T=iS(i
public class ImprovedMergeSort implements SortUtil.Sort { Tagf7tw4
'C]w3Rh'
private static final int THRESHOLD = 10; xl&@g)Jj
EXDDUqZ5\
/* >8f~2dH2%
* (non-Javadoc) Ku(YTXtK
* 1d5%(:@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /2tA n
*/ %*R, ceuI
public void sort(int[] data) { EF0v!XW
int[] temp=new int[data.length]; giakEPl
mergeSort(data,temp,0,data.length-1); YYWD\Y`8
} k@4N7}
M\]lNQA
private void mergeSort(int[] data, int[] temp, int l, int r) { [`n_> p!
int i, j, k; 4MgN
int mid = (l + r) / 2; 5vx 4F f
if (l == r) msl.{
return; W A/dt2D|
if ((mid - l) >= THRESHOLD) A@A8xn%
mergeSort(data, temp, l, mid); ;uBGB h<
else ;_<~9;
insertSort(data, l, mid - l + 1); ~KK} $iM
if ((r - mid) > THRESHOLD) sxNf"C=-.
mergeSort(data, temp, mid + 1, r); [D"6&
else z|#*c5Y9w
insertSort(data, mid + 1, r - mid); ?P kJG,~
Y~"tL(WfJl
for (i = l; i <= mid; i++) { gIB3DuUo
temp = data; Od!)MQ*,
} IWv 9!lW
for (j = 1; j <= r - mid; j++) { C QkY6
temp[r - j + 1] = data[j + mid]; V(';2[)
} )z[C=
int a = temp[l]; _2fW/U54_
int b = temp[r]; ;s+/'(*
for (i = l, j = r, k = l; k <= r; k++) { OSBR2Z;=
if (a < b) { M':-f3aT%
data[k] = temp[i++]; V:\:[KcL^
a = temp; csP4Oq\g[
} else { zL"e.
data[k] = temp[j--]; <.h7xZ
b = temp[j]; WVP?Ie8
} "N+4TfXy
} s)-An(Uw
} { DYY9MG8
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/** 5CI{&E
* @param data h FU8iB`Q
* @param l }-3 VK%
* @param i X=QX9Ux?^
*/ #Vk?
private void insertSort(int[] data, int start, int len) { iOiFkka
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6n9/`D!
} kV'zAF v
} *zdD4I=
} 4C;;V m4~
} Fb,*;M1'
#}7T$Va
堆排序： HPtMp#`T
W@R7CQE@
package org.rut.util.algorithm.support; Rw+r1vW:A
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import org.rut.util.algorithm.SortUtil; iv*RE9?^
pwo$qs(p
/** "6U0 !.ro@
* @author treeroot d"|_NG`vr
* @since 2006-2-2 PQaTS*0SXJ
* @version 1.0 dz^HN`AlzC
*/ hz/mNDE]
public class HeapSort implements SortUtil.Sort{ FGVw=G{r
13?:a[~=Y
/* (non-Javadoc) >Na.C(DZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #9GfMxH
*/ /\1'.GR
public void sort(int[] data) { ] (e ,J
MaxHeap h=new MaxHeap(); 6ALjM-t=V
h.init(data); Q>5f@aN
for(int i=0;i h.remove(); N@thewt|
System.arraycopy(h.queue,1,data,0,data.length); @Ou H=<YN
} Cu@q*:'
, Q0Y} )
private static class MaxHeap{ DuC#tDP
8g-u
void init(int[] data){ %n$f#Ml_r
this.queue=new int[data.length+1]; [{Wo:c9Qq1
for(int i=0;i queue[++size]=data; 6FDj:~
fixUp(size); "](Q2
} wR_mJMk_
} <zXG}JuL@T
/ &Z8g4vc
private int size=0; "L.k m
B EwaQvQ!
private int[] queue; 7;Ze>"W>
+3o vO$g
public int get() { 2/3yW.C
return queue[1]; >/-H!jUF]
} $}vk+.!*1
tav@a)
public void remove() { Q0xGd(\
SortUtil.swap(queue,1,size--); JV_`E_!
fixDown(1); "|JbdI]%P
} xoVd[c!
file://fixdown \PS]c9@,rc
private void fixDown(int k) { `R0~mx&6G
int j; k<*v6 sNs;
while ((j = k << 1) <= size) { B W*8
if (j < size %26amp;%26amp; queue[j] j++; & %/p;::A
if (queue[k]>queue[j]) file://不用交换 K~#?Y,}O
break; e6p3!)@P1
SortUtil.swap(queue,j,k); sqhMnDn[
k = j; M"*NV(".g
} d'(n/9K
} WWSycH ?[
private void fixUp(int k) { tQ@7cjq8bA
while (k > 1) { e (]]
int j = k >> 1; g#(+:^3'
if (queue[j]>queue[k]) c&PsT4Wh
break; )q{qWobS0
SortUtil.swap(queue,j,k); +mjwX?yF
k = j; A\?t^T
} T"99m^y
} Tu-lc)
g7323m1=
} (A=PDjP!
EY]H*WJJ
} _1)n_P4
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SortUtil： .4]XR/I$
A$p&<#
package org.rut.util.algorithm; z#G\D5yX[*
~AD>@;8fG
import org.rut.util.algorithm.support.BubbleSort; YnnK]N;\x
import org.rut.util.algorithm.support.HeapSort; ;40Z/#FI
import org.rut.util.algorithm.support.ImprovedMergeSort; f\5w@nX
import org.rut.util.algorithm.support.ImprovedQuickSort; 2<*"@Vj
import org.rut.util.algorithm.support.InsertSort; 8(j]=n6r
import org.rut.util.algorithm.support.MergeSort; :.=:N%3[
import org.rut.util.algorithm.support.QuickSort; y9mV6.r
import org.rut.util.algorithm.support.SelectionSort; @~vg=(ic(
import org.rut.util.algorithm.support.ShellSort; R:n|1]*f3X
([<{RjPb
/** Q=! lbW
* @author treeroot > 3x^jh
* @since 2006-2-2 $cn8]*Z=
* @version 1.0 d7BpmM
*/ O-[YU%K3?
public class SortUtil { F3V:B.C
public final static int INSERT = 1; }c||$
public final static int BUBBLE = 2; N5)H(<}
public final static int SELECTION = 3; AAfhh5i
public final static int SHELL = 4; gK~Z Ch
public final static int QUICK = 5; n3?P8m$
public final static int IMPROVED_QUICK = 6; psvc,V_*
public final static int MERGE = 7; #}fvjJ{
public final static int IMPROVED_MERGE = 8; @|;[ ;:h@
public final static int HEAP = 9; +o3n%( ^~
{8mJ<b>VA
public static void sort(int[] data) { }WJXQ@
sort(data, IMPROVED_QUICK); T$mT;k
} N@_y<7#C
private static String[] name={ &LI q?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y->sJm
}; )0I-N)
+|;Ri68
private static Sort[] impl=new Sort[]{ G8]{pbX
new InsertSort(), ThP~k9-
new BubbleSort(), 8Y%
new SelectionSort(), 2FdwX,O.
new ShellSort(), Qxy~%;X
new QuickSort(), DEu0Z
new ImprovedQuickSort(), !0^4D=dO
new MergeSort(), t,TlW^-
new ImprovedMergeSort(), g_ep 5#\D
new HeapSort() 7V^j9TC
}; K8KN<Q s]
IM6n\EZ^
public static String toString(int algorithm){ f4\F:YT
return name[algorithm-1]; Q(x=;wf5r
} ;~ Xjk
mx1Bk9h%Xe
public static void sort(int[] data, int algorithm) { p]X+#I<
impl[algorithm-1].sort(data); D*46,>Tv
} ~{g/
%;]/Z%!
public static interface Sort { rc:UG "[
public void sort(int[] data); | #a{1Z)
} 3v$n}.
9FC_B+7
public static void swap(int[] data, int i, int j) { ,h%n5R$:
int temp = data; [ s/j?/9
data = data[j]; & :W6O)uY
data[j] = temp; orWF>o=1
} 5Th\wTh04
} \3(s&K\Y6\