[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; +RyV"&v
} B1b9 JS(>
int i1=l; 3?<LWrhV3
int i2=mid+1; KDLrt
for(int cur=l;cur<=r;cur++){ ~SYW@o
if(i1==mid+1) aJ J63aJ
data[cur]=temp[i2++]; gm7 [m}
else if(i2>r) q;QE(}.g
data[cur]=temp[i1++]; fY!9i5@'
else if(temp[i1] data[cur]=temp[i1++]; E*d UJ.>
else N;i\.oY
data[cur]=temp[i2++]; u4DrZ-v
} Sgn<=8,6c
} H}gp`YW:4
a.fdCI]%
} - 9a4ej5
!JA//{?
改进后的归并排序: <l<6W-I
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package org.rut.util.algorithm.support; jt3=<&*Bm
TVAa/_y2`
import org.rut.util.algorithm.SortUtil; zEi\#Zg$
O6Y1*XTmH6
/** q$'[&&_
* @author treeroot Z=(Tq1t
* @since 2006-2-2 Hd_,`W@
* @version 1.0 Dw<bLSaW&
*/ XzPUll;ZU
public class ImprovedMergeSort implements SortUtil.Sort { :}-izd)/j
>LJ<6s[=
private static final int THRESHOLD = 10; 3)hQT-)
ba^/Ar(B
/* ^;wz+u4^l
* (non-Javadoc) 2Mj_wc
* b;5 M$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g9j&\+h^
*/ '~zi~Q7M
public void sort(int[] data) { z-h?Q4;
int[] temp=new int[data.length]; ,@\z{}~v
mergeSort(data,temp,0,data.length-1); AYfL}X<Ig
} =ba1::18
kc<5wY_t
private void mergeSort(int[] data, int[] temp, int l, int r) { $4hi D;n
int i, j, k; ~bz$]o-<
int mid = (l + r) / 2; s01=C3
if (l == r) vb3hDy
return; |\W~+}'g~
if ((mid - l) >= THRESHOLD) Q+s2S>U{v
mergeSort(data, temp, l, mid); u-*z#e_L0
else <MoyL1=
insertSort(data, l, mid - l + 1); *0'< DnGW
if ((r - mid) > THRESHOLD) (6&"(}Pai
mergeSort(data, temp, mid + 1, r); QWE\Ud.q
else X6xs@tgQ
insertSort(data, mid + 1, r - mid); $@84nR{>
ll*Ez"
for (i = l; i <= mid; i++) { m$7C{Mr'
temp = data; 2a*+mw
} 8+H 0
for (j = 1; j <= r - mid; j++) { XW~a4If
temp[r - j + 1] = data[j + mid]; j1=su~
} 5F#FC89Kk
int a = temp[l]; 4RfBXVS
int b = temp[r]; \UZ7_\
for (i = l, j = r, k = l; k <= r; k++) { aLlHR_
if (a < b) { c/V0AKkS 8
data[k] = temp[i++]; w+a5/i@
a = temp; RwhKW?r+
} else { Q7\j:.
data[k] = temp[j--]; <k{_YRB
b = temp[j]; N:~4>p44[
} >E3-/)Ti
} ).-#
} Lcf?VV}
q*kLi~Oe
/** ]dgi]R|`
* @param data &P"13]^@
* @param l %evtIU<h
* @param i JP^\
*/ I'[;E.KU
private void insertSort(int[] data, int start, int len) { |>'q%xK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b_7LSp
} Q$sC%P(y
} KtArV
} ;#mm_*L%@
} q$"?P
F>GPi!O
堆排序： *Uy;P>8
Pq@-`sw
package org.rut.util.algorithm.support; YL78cWOs
`g4N]<@z
import org.rut.util.algorithm.SortUtil; \U##b~Z,g
v=Q!ioE7
/** v*c"SI=@M=
* @author treeroot 1hzf+*g
* @since 2006-2-2 h<8c{RuoZC
* @version 1.0 I!SIy&=W
*/ <N>7.G
public class HeapSort implements SortUtil.Sort{ Mpco8b-b
S!b?pl
/* (non-Javadoc) &N]e pV>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P&<NcOCL&
*/ 6']G HDK
public void sort(int[] data) { %UhLCyC/
MaxHeap h=new MaxHeap(); 3to!C"~\K-
h.init(data); 'St?nW3
for(int i=0;i h.remove(); $yq76
System.arraycopy(h.queue,1,data,0,data.length); ii>^]iT
} ?%#no{9
dBS_N/
private static class MaxHeap{ 'Yh`B8
f6nuh&!-
void init(int[] data){ V?mk*CU
this.queue=new int[data.length+1]; 2aX$7E?
for(int i=0;i queue[++size]=data; =#[t!-@
fixUp(size); -$_FKny
} Zsmv{p
} L3'isaz&^
1ox#hQBoS
private int size=0; w4_Xby)
@&%/<|4P5
private int[] queue; 27,c}OS5o
NU+PG`Vb
public int get() { IXlk1tHN4I
return queue[1]; c5:0`~5Fn
} lQ4^I^?m
<#199`R
public void remove() { H q?F@X
SortUtil.swap(queue,1,size--); )?$@cvf
fixDown(1); 9_.pLLx
} ,?IXfJ`c
file://fixdown 5|>ms)[RQ
private void fixDown(int k) { -AU'1iRcK7
int j; Gpcordt/
while ((j = k << 1) <= size) { bj0<A
if (j < size %26amp;%26amp; queue[j] j++; A f!`7l-
if (queue[k]>queue[j]) file://不用交换 dm40qj
break; aY;34SF
SortUtil.swap(queue,j,k); z@?y(E
k = j; 0NU3% 4?
} 8 nqF i
} "u&7Y:)^wr
private void fixUp(int k) { >Q^ mR
while (k > 1) { o4@d,uIw^
int j = k >> 1; q[}re2
if (queue[j]>queue[k]) [+#k+*1*o
break; lbw+!{Ch
SortUtil.swap(queue,j,k); "}ur"bU1
k = j; x1STjI>i
} mA_EvzXk\
} 0;,Y_61
E[=&6T4
} 4>H0a
3RxR'M1
} wV{j CQ
k`]76C7
SortUtil： HU|qeSyel
b"`fS`@/MW
package org.rut.util.algorithm; Zm|il9y4m
'O9Yu{M
import org.rut.util.algorithm.support.BubbleSort; *UJB*r
import org.rut.util.algorithm.support.HeapSort; +l!.<:sp
import org.rut.util.algorithm.support.ImprovedMergeSort; )te_ <W
import org.rut.util.algorithm.support.ImprovedQuickSort; NwQ$gDgu t
import org.rut.util.algorithm.support.InsertSort; '%:E4oI
import org.rut.util.algorithm.support.MergeSort; uC#]F@
import org.rut.util.algorithm.support.QuickSort; wdV)M?
import org.rut.util.algorithm.support.SelectionSort; JHVndK4L
import org.rut.util.algorithm.support.ShellSort; cXN0D\%`
v<g#/X8
/** RU=g|TL
* @author treeroot 6& hiW]Adm
* @since 2006-2-2 E5c)\ D
* @version 1.0 N[O_}_
*/ 66+]D4(k
public class SortUtil { {_z6
public final static int INSERT = 1; sk~7"v{Y.
public final static int BUBBLE = 2; W=|'&UU Ul
public final static int SELECTION = 3; f^5sJ0;%
public final static int SHELL = 4; ^{++h?cS)
public final static int QUICK = 5; (4`Tf*5hHa
public final static int IMPROVED_QUICK = 6; L]BTX]
public final static int MERGE = 7; S_VzmCi
public final static int IMPROVED_MERGE = 8; KK-+vq
public final static int HEAP = 9; c\tw#;\9
M$f_I +
public static void sort(int[] data) { zx"0^r}
sort(data, IMPROVED_QUICK); SL^%Zh/~
} miCY?=N`
private static String[] name={ `fVzY"Qv k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z vyF"4QN
}; wjOqCF"
v{\~>1J{
private static Sort[] impl=new Sort[]{ ?q5HAIZ`
new InsertSort(), QEx&AT
new BubbleSort(), fKuaom9
new SelectionSort(), Q-U,1b
new ShellSort(), D6e<1W
new QuickSort(), e+@.n
new ImprovedQuickSort(), Ag1nxV1M$
new MergeSort(), kll,^A
new ImprovedMergeSort(), MUN:}S
new HeapSort() u/\Ipk/
}; ~H]d9C
"DJ%Yo
public static String toString(int algorithm){ \D[~54
return name[algorithm-1]; ZQ[s:
} ^1--7#H
T(~^X-k
public static void sort(int[] data, int algorithm) { BMhuM~?(
impl[algorithm-1].sort(data); |txzIc.#
} \}Pr!tk!
EkN>5).
public static interface Sort { wo^1%:@/2
public void sort(int[] data); RZj06|r8
} 6|%HCxWO
fAvB!e
public static void swap(int[] data, int i, int j) { ]d&;QZ#w
int temp = data; RWn#"~
data = data[j]; 27H4en; o=
data[j] = temp; F0Z cV>j}
} x1:1Jj:
} 8EI&}I