[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; s~A#B)wB
} u@(z(P
int i1=l; @P1#)
int i2=mid+1; 6qCRM*V
for(int cur=l;cur<=r;cur++){ -k$*@Hq
if(i1==mid+1) r8o9C
data[cur]=temp[i2++]; v[3QI7E3
else if(i2>r) `s0`kp
data[cur]=temp[i1++]; H9@24NFb
else if(temp[i1] data[cur]=temp[i1++]; `v]|x,l+C
else X/=*o;":
data[cur]=temp[i2++]; >";I3S-t
} 7Wd}H Z
} 3Kv~lo^
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} TLBIM
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改进后的归并排序: Ya%-/u
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package org.rut.util.algorithm.support; sZ-A~X@g
jH4,-
import org.rut.util.algorithm.SortUtil; OGDCC/
GFq,Ca~
/** q_5hKipd\b
* @author treeroot 7W)*IJ
* @since 2006-2-2 Yy,i,c`r
* @version 1.0 ]c67zyX=%
*/ K *<+K<Tp
public class ImprovedMergeSort implements SortUtil.Sort { EWcqMD]4u
3RwDIk?>%
private static final int THRESHOLD = 10; ,*y\b|<j
~9[^abz
/* EAPLe{qw:q
* (non-Javadoc) B+8lp4V9%
* GmjTxNU@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bgi B*`z
*/ xsPY#
public void sort(int[] data) { SxAZ2|/-
int[] temp=new int[data.length]; DdI V~CxD
mergeSort(data,temp,0,data.length-1); a#U2y"
} +>w %j&B
e-4 Qw#cw
private void mergeSort(int[] data, int[] temp, int l, int r) { <Mt>v2a3Y
int i, j, k; G_5uO58
int mid = (l + r) / 2; C(4r>TNm
if (l == r) GKT^rc-YT-
return; C0RnBu
if ((mid - l) >= THRESHOLD) *$+:Cbe-F
mergeSort(data, temp, l, mid); JB}jt)ol%
else ]J]~i[
insertSort(data, l, mid - l + 1); kMCgfL
if ((r - mid) > THRESHOLD) E8`AU<
mergeSort(data, temp, mid + 1, r); %^zGM^PD
else `vMrlKq
insertSort(data, mid + 1, r - mid); AW\#)Em
UWf@(8
for (i = l; i <= mid; i++) { ?y1G,0,
temp = data; 9fj8r3 F#
} K6..N\7
for (j = 1; j <= r - mid; j++) { = Ff2
temp[r - j + 1] = data[j + mid]; r_p4pxs
} (^U 8wit/
int a = temp[l]; U?WS\Jji3!
int b = temp[r]; `~+1i5-}
for (i = l, j = r, k = l; k <= r; k++) { 8c1ma
if (a < b) { 4ayZ.`aK
data[k] = temp[i++]; 4:50dj
a = temp; 3-%F)@n
} else { $-J=UT2m
data[k] = temp[j--]; $K'A_G^
b = temp[j]; #mFY?Zp)
} ah8xiABa
} [VL+X^
} >3,t`Z:
MlVVST
/** fxcCz 5
* @param data ?h1r6?Sug{
* @param l i& phko}
* @param i asLvJ{d8s
*/ a6/$}lCq
private void insertSort(int[] data, int start, int len) { Wh7}G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xDtJ&6uFw
} $={^':Uh
} !^h{7NmP[
} :#pfv)W6t
} 0Xe?{!@a
1P '_EJ]M
堆排序： wpW3%r;9
:Qd{V3*]
package org.rut.util.algorithm.support; Q"Ur*/-U
[\|p~Qb)s
import org.rut.util.algorithm.SortUtil; ymr#OP$<S
4Ww.CkRG
/** uY"Bgz:=d
* @author treeroot :OFL@byS
* @since 2006-2-2 K3xs=q]:@
* @version 1.0 !#' y#
*/ ~V:@4P
public class HeapSort implements SortUtil.Sort{ &i8UPp%
JIYZ
/* (non-Javadoc) 6Y 4I $[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8h=Rfa9
*/ D?Y j5eOa
public void sort(int[] data) { wFHz<i!jr&
MaxHeap h=new MaxHeap(); _(&XqEX
h.init(data); rF>7 >wq
for(int i=0;i h.remove(); NR@n%p
System.arraycopy(h.queue,1,data,0,data.length); So^;5tG
} ]u(EEsG/
_=s{,t &u
private static class MaxHeap{ E#I^D/0
6%8,OOS
void init(int[] data){ ~UhTy~jya
this.queue=new int[data.length+1]; g5,Bj
for(int i=0;i queue[++size]=data; zK@DQ5
fixUp(size); _w\A=6=q|
} U$+G9
} Kz`g Q|S
`dpm{sn
private int size=0; =u,8(:R]s
D$W09ng-
private int[] queue; Eqc,/
N7WQ{/PSG
public int get() { F\"`^`(O
return queue[1]; XFx p^
} <`/22S"
NZh\{!
public void remove() { $^XCI%DH
SortUtil.swap(queue,1,size--); ='"hB~[
fixDown(1); q4wS<,3
} I_\#(
file://fixdown F]4JemSjK
private void fixDown(int k) { (uk-c~T!u
int j; kbHfdA
while ((j = k << 1) <= size) { /O$7A7Tl
if (j < size %26amp;%26amp; queue[j] j++; ja_.{Zv
if (queue[k]>queue[j]) file://不用交换 y))) {X
break; `ywI+^b
SortUtil.swap(queue,j,k); 1[&V6=n
k = j; `[=3_
} g AZe&"K
} r`8>@2sW1
private void fixUp(int k) { TODTR7yGo
while (k > 1) { 8:=EA3
int j = k >> 1; nR2pqaKc
if (queue[j]>queue[k]) dhAkD-Lh
break; l)^sE)
SortUtil.swap(queue,j,k); \F }s"#
k = j; pm 4"Q!K
} 2[;4D/`*
} MMYV8;c
!9/1_Bjv
} zKP{A Sk
TcP (?v
} M~uX!bDH
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SortUtil： P t)Ni
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package org.rut.util.algorithm; [!k#au+#c
f L}3I(VK
import org.rut.util.algorithm.support.BubbleSort; PI5a'k0F
import org.rut.util.algorithm.support.HeapSort; q|N/vkqPz
import org.rut.util.algorithm.support.ImprovedMergeSort; n:#gKR-J
import org.rut.util.algorithm.support.ImprovedQuickSort; 2Y`C\u
import org.rut.util.algorithm.support.InsertSort; (i"@{[IP
import org.rut.util.algorithm.support.MergeSort; s:fy *6=[Z
import org.rut.util.algorithm.support.QuickSort; Gd]!D~[1
import org.rut.util.algorithm.support.SelectionSort; Gop;!aV1*
import org.rut.util.algorithm.support.ShellSort; 0bt"U=x4
F*bmV>Qq
/** k^vsQ'TD
* @author treeroot =(-oQ<@v
* @since 2006-2-2 9\aR{e,1
* @version 1.0 !RJuH;8
*/ $<~o,e-4
public class SortUtil { 5dPPm%U{
public final static int INSERT = 1; {);S6F$[3
public final static int BUBBLE = 2; =y>g:}G7
public final static int SELECTION = 3; ^Iz(V2
public final static int SHELL = 4; b/I_iJ8t
public final static int QUICK = 5; b\dzB\,&
public final static int IMPROVED_QUICK = 6; S5W*,?
public final static int MERGE = 7; F_?aoP&5
public final static int IMPROVED_MERGE = 8; (q@DBb4
public final static int HEAP = 9; 'rX!E,59
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public static void sort(int[] data) { SG)hrd
sort(data, IMPROVED_QUICK); RJz$$,RU
} ,Qd;t
private static String[] name={ T/A[C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vuOixAkw
}; QNk\y@yKw
+ \DGS
private static Sort[] impl=new Sort[]{ &6yh4-(7
new InsertSort(), U1Z.#ETnM
new BubbleSort(), \G!TC{6
new SelectionSort(), {NS6y\,
new ShellSort(), exnFy-
new QuickSort(), vp4l g1/
new ImprovedQuickSort(), }=+J&cR
new MergeSort(), CPw=?<db
new ImprovedMergeSort(), rr@S|k:|
new HeapSort() 1236W+
}; )o:%Zrk
^RS?y8
public static String toString(int algorithm){ LFi8@
return name[algorithm-1]; tqnvC UIE
} bpQ5B'9
U^ecg{
public static void sort(int[] data, int algorithm) { W!R}eLf@
impl[algorithm-1].sort(data); .5i\L OTd
} Jj_ t0"
Ic%c%U=i
public static interface Sort { ':}
public void sort(int[] data); SnK#YQCDt
} wVSk.OOB
vy <(1\
public static void swap(int[] data, int i, int j) { YH0=YmU#X
int temp = data; X0h`g)Bbf
data = data[j]; 8>}k5Qu
data[j] = temp; B.e3IM0
} 7)2Co[t
} XS L*e