[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; 17S<6j#H5
} ]:Sb#=,!&!
int i1=l; .(X!*J]G
int i2=mid+1; cW?~]E'<
for(int cur=l;cur<=r;cur++){ 9}#9i^%}
if(i1==mid+1) mL]5Tnc
data[cur]=temp[i2++]; ;`rz]7,*
else if(i2>r) g7O, <
data[cur]=temp[i1++]; *(j-jbA
else if(temp[i1] data[cur]=temp[i1++]; v\Edf;(
else !y7w~UVs
data[cur]=temp[i2++]; ;0;5+ J7
} O^<\]_l
} ({9P, D~2
_v +At;Y
} +YnQOh%v0s
vlx\hJ<I
改进后的归并排序: 4<y|SI!
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package org.rut.util.algorithm.support; oxJ#NGD
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import org.rut.util.algorithm.SortUtil; ;1L7+.A
mFJb9,
/** f<l.%B
* @author treeroot g33Y]\
* @since 2006-2-2 Jec<1|
* @version 1.0 T8\%+3e.
*/ 15wwu} X
public class ImprovedMergeSort implements SortUtil.Sort { iYb{qv_4
X2to](\%X
private static final int THRESHOLD = 10; p^i]{"sjbU
AW/)R"+
/* e3x;(@j
* (non-Javadoc) 6uubkt
* -KU@0G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `)_11ywZ
*/ 4Vrx9 sA1
public void sort(int[] data) { W!4xE
int[] temp=new int[data.length]; H\ONv=}7I
mergeSort(data,temp,0,data.length-1); Z=CY6Zu7
} a#i%7mfn
W5a>6u=g,
private void mergeSort(int[] data, int[] temp, int l, int r) { E?3$ *t
int i, j, k; R22P ol
int mid = (l + r) / 2; "f3KE=cUm
if (l == r) G?QU|<mj<
return; &4-rDR,
if ((mid - l) >= THRESHOLD) 6N]V.;0_5
mergeSort(data, temp, l, mid); sKuPV
else ufWd)Q
insertSort(data, l, mid - l + 1); 5,1q%
if ((r - mid) > THRESHOLD) .3*VkAs
mergeSort(data, temp, mid + 1, r); +i.b&PF'H
else [Q*aJLG
insertSort(data, mid + 1, r - mid); 'hw_ew
w=S7zzL)
for (i = l; i <= mid; i++) { ~ E|L4E
temp = data; GDj ViAFm
} .4-I^W"1
for (j = 1; j <= r - mid; j++) { x#s=eeP1
temp[r - j + 1] = data[j + mid]; smt6).o
} ljo^ 2
int a = temp[l]; 'L0{Ed+9
int b = temp[r]; m+/-SG
for (i = l, j = r, k = l; k <= r; k++) { I+^B]@"
if (a < b) { Z2dy|e(c
data[k] = temp[i++]; !.ot&EbE
a = temp; 2!^[x~t
} else { (iZE}qf7g
data[k] = temp[j--]; Aa;s.:?
b = temp[j]; e!(0y)*
} &JpFt^IHi
} GL_a`.=@
} boR&'yX
p8q9:Tz
/** a+CHrnU\;
* @param data =Xc[EUi<;g
* @param l |,ZmRW^2K
* @param i w*Gv#B9G
*/ 3T3p[q4
private void insertSort(int[] data, int start, int len) { Svmyg]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 43;@m}|7$
} @:~O
} kxg]sr"
} .FnO
} .wD>0Ig
qG/a5i
堆排序： ^#R-_I
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package org.rut.util.algorithm.support; \"qXlTQ1_9
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import org.rut.util.algorithm.SortUtil; 8IH&=3
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/** g]V}azLr
* @author treeroot dyjzF`H
* @since 2006-2-2 m%$z&<!
* @version 1.0 x,js}Mlw
*/ $.}fL;BzVz
public class HeapSort implements SortUtil.Sort{ *_$%Tv.]
0*%j6*XDq9
/* (non-Javadoc) 'f<0&Ci8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -uiZp !
*/ _VR Sdr5
public void sort(int[] data) { ^\cB&<h
MaxHeap h=new MaxHeap(); 2C%{A
h.init(data); RC8{QgaI
for(int i=0;i h.remove(); x!q$`zF\\
System.arraycopy(h.queue,1,data,0,data.length); ~\K+)(\SNp
} JW&/l
K,' ]G&K
private static class MaxHeap{ (^eSm]<
!xMyk>%2
void init(int[] data){ Rcf_31 L
this.queue=new int[data.length+1]; K2L+tw
for(int i=0;i queue[++size]=data; +J$[RxQ#
fixUp(size); lMp)T**
} !l_1r$
} p[&'*"o!/
GFx>xQk
private int size=0; ;,Sl+)@h
VbK| VON[
private int[] queue; ,a< !d
B4GgR,P@S
public int get() { ~tDV{ml
return queue[1]; TeG5|`t],
} 6{}]QvR
I2%{6g@
public void remove() { .BlGV2@^#
SortUtil.swap(queue,1,size--); T\b e(@r
fixDown(1); tp_*U,
} ]gkI:scPA
file://fixdown h5x FP
private void fixDown(int k) { 9pStArF?F0
int j; =4/lJm``
while ((j = k << 1) <= size) { I9ubVcV8
if (j < size %26amp;%26amp; queue[j] j++; 2@1A,
if (queue[k]>queue[j]) file://不用交换 sju. `f>-r
break; qJVW :$1q
SortUtil.swap(queue,j,k); xc8MOm
k = j; I8`@Srw8
} N4}/n
} Am!$\T%2
private void fixUp(int k) { D>~z{H%\
while (k > 1) { z`xdRe{QP
int j = k >> 1; ed2QGTgR
if (queue[j]>queue[k]) (5;w^E9*n;
break; me$7\B;wy
SortUtil.swap(queue,j,k); %ztCcgu*
k = j; JpD<2Mz_|V
} _%;$y5]v
} }X)mZyM[
lycY1lK
} TNUzNA
<:2El9l!
} $dgY#ST%
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SortUtil： 9Rzu0:r.,
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package org.rut.util.algorithm; 7P?z{x':T
7<mY{!2iF?
import org.rut.util.algorithm.support.BubbleSort; #<S+E7uTs
import org.rut.util.algorithm.support.HeapSort; ^|Of
import org.rut.util.algorithm.support.ImprovedMergeSort; X.}:gU-
import org.rut.util.algorithm.support.ImprovedQuickSort; V"#ie Yn
import org.rut.util.algorithm.support.InsertSort; *ELbz}Q
import org.rut.util.algorithm.support.MergeSort; fl!8\4
import org.rut.util.algorithm.support.QuickSort; AwAUm 2^
import org.rut.util.algorithm.support.SelectionSort; EQ-r
import org.rut.util.algorithm.support.ShellSort; "b8<C>wY
D4ESo)15'
/** 5yI_uQR
* @author treeroot ZC@ 33Q(
* @since 2006-2-2 '0[D-jEr
* @version 1.0 !=3[Bm G
*/ \ty{KAc&
public class SortUtil { G?jKm_`L
public final static int INSERT = 1; Pb]: i+c)
public final static int BUBBLE = 2; IKMkpX!]
public final static int SELECTION = 3; 3~;LNi
public final static int SHELL = 4; [ p$f)'
public final static int QUICK = 5; 2%'{f
public final static int IMPROVED_QUICK = 6; 5f(yF
public final static int MERGE = 7; (, /`*GC
public final static int IMPROVED_MERGE = 8; )q8w+'z
public final static int HEAP = 9; WUm83"
}A\s`Hm
public static void sort(int[] data) { ]B/Gz
sort(data, IMPROVED_QUICK); s!X@ l
} RSC^R}a5
private static String[] name={ ijEMS1$=7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9=O`?$y
}; l=ehoyER
wmAZ {
private static Sort[] impl=new Sort[]{ $A]2Iw!&
new InsertSort(), 18f!k
new BubbleSort(), As }:~Jy|
new SelectionSort(), FNL[6.!PV
new ShellSort(), ?{[ISk)
new QuickSort(), M{cF14cQ
new ImprovedQuickSort(), k&wCa<Rs~R
new MergeSort(), l2vIKc
new ImprovedMergeSort(), @iwVU]j
new HeapSort() b;G3&R]
}; -c|dTZ8D)8
AiKja>Fl<
public static String toString(int algorithm){ X|zQZ<CO
return name[algorithm-1]; e&sZ]{uD
} N4]QmRX/j
%Hx8%G!
public static void sort(int[] data, int algorithm) { VPW@y
impl[algorithm-1].sort(data); ^YG'p?r.s
} sQUJ]h
NbgK#;
public static interface Sort { 9'nM$a
public void sort(int[] data); fy]z<SPhVJ
} Wi7!J[ B
B_R J;.oH
public static void swap(int[] data, int i, int j) { nb-]fa
int temp = data; zG-pqE6
data = data[j]; a,mG5bQ!
data[j] = temp; DQ%bcXs
} cjK\(b3
} -':;0