[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; >K`.!!av,Y
} '-jKv=D+
int i1=l; D\Y)E#%,
int i2=mid+1; !$q1m@K1
for(int cur=l;cur<=r;cur++){ ?Y"bt^4j
if(i1==mid+1) d}f| HOFq
data[cur]=temp[i2++]; ~A8%[.({5
else if(i2>r) ?KxI|os
data[cur]=temp[i1++]; h.)2,
else if(temp[i1] data[cur]=temp[i1++]; CvpqQ7&k7
else ,5\:\e0H
data[cur]=temp[i2++]; V:42\b7x
} 7YRDQjg
} =q|fe%#
*$(=I6b
} p71%-nV
?o0#h
改进后的归并排序: 5iola}6
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package org.rut.util.algorithm.support; >qA5
da@y*TO#i
import org.rut.util.algorithm.SortUtil; 1{ #Xa=
syh0E=If_
/** |-7<?aw"
* @author treeroot \Rn.ug
* @since 2006-2-2 AK<ZP?0
* @version 1.0 x7e
*/ V,qZF=}S
public class ImprovedMergeSort implements SortUtil.Sort { ^v3+w"2
'Rfvr7G/?
private static final int THRESHOLD = 10; V>P\yr?
f5a%/1?
/* /x_C
* (non-Javadoc) 1at$_\{.(
* Fm}O,=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 81a&99k#
*/ 4~a0
public void sort(int[] data) { Pyi PhOJe
int[] temp=new int[data.length]; *9^CgLF
mergeSort(data,temp,0,data.length-1); f/)3b`$Wu
} Pi?*rr5WZ
6\86E$f=h
private void mergeSort(int[] data, int[] temp, int l, int r) { 2h&pm
int i, j, k; ;J\{r$q
int mid = (l + r) / 2; BN4dr9T
if (l == r) kyJv,!};
return; wrG*1+r
if ((mid - l) >= THRESHOLD) 7kn=j6I
mergeSort(data, temp, l, mid); {CH\TmSz
else kt1f2cj
insertSort(data, l, mid - l + 1); whKr3)
if ((r - mid) > THRESHOLD) P7\(D`
mergeSort(data, temp, mid + 1, r); kSNVI-Wzu
else se_zCS4Y
insertSort(data, mid + 1, r - mid); ^F?H)[0
_0F6mg n
for (i = l; i <= mid; i++) { iy tSC
temp = data; MbnV5b:X
} zi>f436-
for (j = 1; j <= r - mid; j++) { 62EJ# q[
temp[r - j + 1] = data[j + mid]; E08AZOY&g
} (I.uQP~H
int a = temp[l]; 3|:uIoR{
int b = temp[r]; H@IX$+;z
for (i = l, j = r, k = l; k <= r; k++) { n2#uH
if (a < b) { ~73"AWlp
data[k] = temp[i++]; #`"'
a = temp; *ep!gT*4
} else { Tf@t.4\
data[k] = temp[j--]; Q\=u2}/z0
b = temp[j]; *MagicA
} ZJ=C[s!wu
} EZP2Bb5g
} 0nie>
D3.sR\Hxf
/** %n}.E304
* @param data oU~V0{7g
* @param l '%RMpyK~
* @param i 1rPeh{SZ
*/ ^DZiz[X+|
private void insertSort(int[] data, int start, int len) { g8kw|BgnL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /LSiDys
} 66L*6O4
} SgXXitg9+
} kj0A%q#'}
} 3SIB #"9
q=?"0i&V
堆排序： 6C]!>i}U
TaolX*$5
package org.rut.util.algorithm.support; _ux6SIyp`
#gN{8Yk>
import org.rut.util.algorithm.SortUtil; ]Vwky]d
Zt!l3(*tt
/** dN*<dz+4r
* @author treeroot +}+hTY$a
* @since 2006-2-2 M2xUs
* @version 1.0 bkOm/8k|4
*/ 5 #kvb$97
public class HeapSort implements SortUtil.Sort{ !d(!1fC
g<.8iW 'c
/* (non-Javadoc) |e< U%v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D[-Ct
*/ +H<%)Lk J
public void sort(int[] data) { T!a8c<'V
MaxHeap h=new MaxHeap(); +^69>L2V
h.init(data); JAiV7v4&R
for(int i=0;i h.remove(); G,"$Erx
System.arraycopy(h.queue,1,data,0,data.length); 4|+ |L_
} qw, >~
_^'k_a
private static class MaxHeap{ -x_iqrB
>8AtT=}w
void init(int[] data){ 8dZH&G@;
this.queue=new int[data.length+1]; zIAMM
for(int i=0;i queue[++size]=data; 15eHddd
fixUp(size); rLKDeB
} WG}QLcP
} @pS[_!EqYz
s+CXKb +
private int size=0; 8c/Ii"1
nVM`&azD
private int[] queue; ',&MYm\
!<X_XA
public int get() { .A `:o
return queue[1]; blPC"3}3Vd
} x4( fW\
& {/u>,
public void remove() { fzio8mKVX
SortUtil.swap(queue,1,size--); uBMNkN8
fixDown(1); =H?Nb:s
} G?_,(
file://fixdown 5g5pzww
private void fixDown(int k) { sO6t8)$b
int j; C9iG`?
while ((j = k << 1) <= size) { `fV$'u
if (j < size %26amp;%26amp; queue[j] j++; #62ww-E~
if (queue[k]>queue[j]) file://不用交换 >S3 >b
break; <A&R%5Vs
SortUtil.swap(queue,j,k); *oWzH_
k = j; =N0cz%
} J~Ph)|AiS
} >WEg8'#O
private void fixUp(int k) { nagto^5X
while (k > 1) { vVf!XZF
int j = k >> 1; #FQVhgc
if (queue[j]>queue[k]) 52 A=c1kb
break; [}Iq-sz;0
SortUtil.swap(queue,j,k); enrmjA&3
k = j; E<4}mSn)
} |S}*M<0
} 3//v{ce1]
N}h%8\
} "O 'I
;C<A}
} n)H0;25L
)K6{_~Kc\
SortUtil： `j$d(+Gv
l`]!)j|+
package org.rut.util.algorithm; M*HG4(n0
!Ch ya
import org.rut.util.algorithm.support.BubbleSort; e_;6UZ+
import org.rut.util.algorithm.support.HeapSort; =w8 YZs8w
import org.rut.util.algorithm.support.ImprovedMergeSort; Lgfr"{C
import org.rut.util.algorithm.support.ImprovedQuickSort; srkOad
import org.rut.util.algorithm.support.InsertSort; <KA@A}
import org.rut.util.algorithm.support.MergeSort; Qw-qcG
import org.rut.util.algorithm.support.QuickSort; 7(;VUR%%.
import org.rut.util.algorithm.support.SelectionSort; qTGy\i
import org.rut.util.algorithm.support.ShellSort; ZSSgc0u^?
?yb{DZ46
/** D-!%L<<
* @author treeroot zK92:+^C
* @since 2006-2-2 BkeP?X
* @version 1.0 F"CYrt
*/ el%Qxak`"
public class SortUtil { sJlKN
public final static int INSERT = 1; A%O#S<sa
public final static int BUBBLE = 2; E=QQZ\w
public final static int SELECTION = 3; /{va<CL
public final static int SHELL = 4; /0uinx
public final static int QUICK = 5; eH8.O
public final static int IMPROVED_QUICK = 6; jYF3u0 )
public final static int MERGE = 7; 5=986ci$U
public final static int IMPROVED_MERGE = 8; AVWrD[ wD2
public final static int HEAP = 9; .gJKr
4#9-Z6kOk
public static void sort(int[] data) { jg8P4s
sort(data, IMPROVED_QUICK); n58jB:XR(
} _JDr?Kg
private static String[] name={ PsnU5f)`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C=cTj7Ub
}; ~] 2R+
CQ[-Cp7
private static Sort[] impl=new Sort[]{ k N+(
new InsertSort(), : eFc.>KoD
new BubbleSort(), 3\G=J
new SelectionSort(), BxU1Q&
new ShellSort(), K=)R!e8
new QuickSort(), DeSTo9A}!
new ImprovedQuickSort(), pAuwSn#i
new MergeSort(), 5XHkRcESZ
new ImprovedMergeSort(), {LDb*'5Cy
new HeapSort() '7R'fhiO/3
}; eV0S:mit
]IV;>94[
public static String toString(int algorithm){ O :^[4$~
return name[algorithm-1]; &/F[kAy
} qI^jwl|k
(^9M9+L[i
public static void sort(int[] data, int algorithm) { ;I'/.gW;{
impl[algorithm-1].sort(data); nL!@#{z
} B vc=gW
%5gJ6>@6Z
public static interface Sort { 88j ;7
public void sort(int[] data); CK</2w+
} 2A|6o*s"
9(WC#-,
public static void swap(int[] data, int i, int j) { KOx#LGz
int temp = data; 9Q/!%y%5
data = data[j]; .*blM1+6i/
data[j] = temp; 1_C6KS
} ]:s|.C%qI
} [#Vr)\n