[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; $Y* d ' >
} N|-M|1w96
int i1=l; n4,b?-E>(
int i2=mid+1; Uo?g@D
for(int cur=l;cur<=r;cur++){ !qk+>6~A,
if(i1==mid+1) K8M[xaI@
data[cur]=temp[i2++]; jsB%RvX
else if(i2>r) =n.d'
data[cur]=temp[i1++]; yXP+$oox9
else if(temp[i1] data[cur]=temp[i1++]; /ap3>xkt
else ){^o"A?-:
data[cur]=temp[i2++]; ,]RMa\Q4Wg
} fNe9as
} ))m\d*
RQhS]y@e
} =p~k5k4
tb36c<U-
改进后的归并排序: TLbnG$VQS
L!G]i;=:
package org.rut.util.algorithm.support; /vC|_G|{
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import org.rut.util.algorithm.SortUtil; &iR3]FNI
:}(Aq;}X
/** :_9MS0
* @author treeroot tNP>6F/
* @since 2006-2-2 ramYSX@
* @version 1.0 *UBukn
*/ RlW0U-%u
public class ImprovedMergeSort implements SortUtil.Sort { !YX$4_I
d[K71
private static final int THRESHOLD = 10; qj|P0N{7
v$~1{}iI5
/* Ai>=n;
* (non-Javadoc) iQs^2z#Bd
* &w15GO;4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w]<V~X
*/ V$wW?+V
public void sort(int[] data) { LF6PKS
int[] temp=new int[data.length]; CVUA7eG+
mergeSort(data,temp,0,data.length-1); *Rm"3S
} ws}cMX]*
xAJ N(8?
private void mergeSort(int[] data, int[] temp, int l, int r) { 9~3;upWu!
int i, j, k; E%Tpby}^'
int mid = (l + r) / 2; 4-j3&(
if (l == r) })#VO-J
return; T($d3Nn1
if ((mid - l) >= THRESHOLD) 4mHR+SZy
mergeSort(data, temp, l, mid); V9KI?}q:W
else 5PF?Eq
insertSort(data, l, mid - l + 1); 0PdeK'7
if ((r - mid) > THRESHOLD) 80J87\)
mergeSort(data, temp, mid + 1, r); _A]8l52pt
else 7Yv1et |
insertSort(data, mid + 1, r - mid); rgq~lZ.U4K
Qc4r?7S<
for (i = l; i <= mid; i++) { @QOlo-u
temp = data; 1f}YKT
} ZVu_E.4.
for (j = 1; j <= r - mid; j++) { QjT$.pUd
temp[r - j + 1] = data[j + mid]; =n@"lY u[
} .,({&L
int a = temp[l]; R:N4_4& C~
int b = temp[r]; d `MTc
for (i = l, j = r, k = l; k <= r; k++) { J!{"^^*
if (a < b) { GgT 5'e;N
data[k] = temp[i++]; b"4'*<=au
a = temp; '%Fg+cZN\
} else { t+9[ki
data[k] = temp[j--]; -d-vzri
b = temp[j]; I:|<};mm
} Fw{:fFZC[
} h@kq>no
} WZ@hP'Zc
rgo#mTQ_
/** yP<ngi^s=
* @param data ujin+;1
* @param l /$[9-G?
* @param i 3#\++h]QZ
*/ s+m3&(X
private void insertSort(int[] data, int start, int len) { Ga<Uvr%+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ow"e3]}Mt
} }>93X0%r
} 4 H<.
} r~[Bzw"c
} nu(;yIRP
Ppton+?(
堆排序： mV>l`&K=
we("#s1=
package org.rut.util.algorithm.support; '@0Z#A
#}xw *)3
import org.rut.util.algorithm.SortUtil; Bm>>-nG;
rtSG-_[i
/** ]3D>ai?
* @author treeroot gPE`mE
* @since 2006-2-2 iY,FfuE
* @version 1.0 ZA1:Y{V
*/ ']bw37_U,
public class HeapSort implements SortUtil.Sort{ !V^wq]D2
AONEUSxJ
/* (non-Javadoc) : Iq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A4~-{.w=
*/ |l-~,eRvi5
public void sort(int[] data) { 8NZQTRdH
MaxHeap h=new MaxHeap(); J#'8]p3E
h.init(data); }AW"2<@
for(int i=0;i h.remove(); Y+d+
System.arraycopy(h.queue,1,data,0,data.length); OA7YWk<K
} *SK`&V
$,.XPK5Qu
private static class MaxHeap{ eG_@WLxwD
=?3b3PZn
void init(int[] data){ IRknD3LX
this.queue=new int[data.length+1]; u~xfI[8C
for(int i=0;i queue[++size]=data; H8x66}
fixUp(size); H:#sf][&,L
} MvKr~
} =vs]Kmm
/2f
private int size=0; RVN;j4uMg
fsjCu!
private int[] queue; y9Q#%a8V
g:fkM{"{
public int get() { nl-y0xD9c
return queue[1]; y3 "+4e
} 5La' I7q
`nCVO;B
public void remove() { O#@G .~n?
SortUtil.swap(queue,1,size--); :Ahw{z`H#
fixDown(1); J))U YJO
} fi~jT"_CI
file://fixdown ,W|cyQ
private void fixDown(int k) { $L4h'(s
int j; *Y':raP
while ((j = k << 1) <= size) { gF>t+"+x
if (j < size %26amp;%26amp; queue[j] j++; im3BQIPR
if (queue[k]>queue[j]) file://不用交换 4%$#
break; it$w.v+W7V
SortUtil.swap(queue,j,k); } *jmWP
k = j; +;ylld
} I=pFGU
} |s'5~+
private void fixUp(int k) { i7b^b>B|e
while (k > 1) { 8|{d1dy
int j = k >> 1; ri/CLq^D
if (queue[j]>queue[k]) dw>1Ut{"3
break; P:>]a$Is
SortUtil.swap(queue,j,k); 5S*aZ1t18
k = j; $DlO<
} Q_)$Ha{>H,
} r>ag(^J\
=[:pm)
} iv ~<me0F
7O-fc1OTv
} P~*'/!@
FL{$9o\@
SortUtil： ?J@P0(M#
7Ucq(,\./
package org.rut.util.algorithm; &Nw[J5-"k
CjGQ
import org.rut.util.algorithm.support.BubbleSort; u[HamGxx$u
import org.rut.util.algorithm.support.HeapSort; 0VZC7@
import org.rut.util.algorithm.support.ImprovedMergeSort; 4(dgunP
import org.rut.util.algorithm.support.ImprovedQuickSort; :6qt[(<"
import org.rut.util.algorithm.support.InsertSort; ?_7iL?
import org.rut.util.algorithm.support.MergeSort; |va^lT
import org.rut.util.algorithm.support.QuickSort; 7Bym?
import org.rut.util.algorithm.support.SelectionSort; 1+#E|YWJ
import org.rut.util.algorithm.support.ShellSort; N;v]ypak
+1]A$|qyW
/** f28bBuv1?
* @author treeroot f~R+Q/Gtz`
* @since 2006-2-2 u}.mJDL
* @version 1.0 >QdT7gB
*/ !;UoZ~
public class SortUtil { nT%ko7~-
public final static int INSERT = 1; q?qH7={,eu
public final static int BUBBLE = 2; Qb5@e#
public final static int SELECTION = 3; "vX\Q rL
public final static int SHELL = 4; 8+ ]'2{
public final static int QUICK = 5; P Ij
public final static int IMPROVED_QUICK = 6; ?vfZ>7Q
public final static int MERGE = 7; Am|)\/K+Z
public final static int IMPROVED_MERGE = 8; <1#hX(Q
public final static int HEAP = 9; :'FCeS9
}]Nt:_UCX
public static void sort(int[] data) { 3RF`F i
sort(data, IMPROVED_QUICK); U4[GA4DZ
} 2wJa:=$
private static String[] name={ #5=W[+4eN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CFUn1^?0
}; [1mEdtqf*
NwVhJdo
private static Sort[] impl=new Sort[]{ ]=p^32
new InsertSort(), BV6B:=E0
new BubbleSort(), $*:g~#bh
new SelectionSort(), -ykD/
new ShellSort(), *,zrg%8
new QuickSort(), ^zW=s$\Fo
new ImprovedQuickSort(), uu.}<VM.1
new MergeSort(), ?G<ISiABQC
new ImprovedMergeSort(), u@;e`-@
new HeapSort() z+{xW7
}; CEVisKcE:
!;4Hh)2
public static String toString(int algorithm){ <I#M^}`
return name[algorithm-1]; K $WMrp
} +4Fw13ADE
Q/q>mN"#1
public static void sort(int[] data, int algorithm) { B}"V.Msv/
impl[algorithm-1].sort(data); .K]Uk/W
} >?#zPweA
R9(Yi<CC
public static interface Sort { Dr76+9'i
public void sort(int[] data); eL<jA9cJ9
} 7X)4ec9H\
==BOW\
public static void swap(int[] data, int i, int j) { Ss0I{0
int temp = data; 8 C9ny}
data = data[j]; FB:nkUR`
data[j] = temp; sm;kg=
} H@u5&
} NwxDxIIH/)