[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; #>[5NQ;$'
} !tckE\ h#N
int i1=l; 1XD|H_JG<j
int i2=mid+1; TxDzGC
for(int cur=l;cur<=r;cur++){ g0M9v]c
if(i1==mid+1) 5IfyD ]<
data[cur]=temp[i2++]; tI;pdR]
else if(i2>r) |`c=`xK7'
data[cur]=temp[i1++]; n>##,o|Vr#
else if(temp[i1] data[cur]=temp[i1++]; NUjo5.7
else \Bg?QhA_D
data[cur]=temp[i2++]; `xm4?6
} o9 g0fC
} Smjg[
48t_?2>
} =j$!N# L
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改进后的归并排序: ye^l~
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package org.rut.util.algorithm.support; }3xZ`vX[T
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import org.rut.util.algorithm.SortUtil; 8Ug`2xS<_
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/** _=d X01
* @author treeroot 0s+pcqOd^
* @since 2006-2-2 Zyx92z9Y
* @version 1.0 _WeN\F~^
*/ cPL]WI0(
public class ImprovedMergeSort implements SortUtil.Sort { qL1d-nH
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private static final int THRESHOLD = 10; kIlK"=
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/* gyx4='Q
* (non-Javadoc) :4'Fq;%C
* D/7hVwMw:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JAA{5@ST
*/ Ei& Z
public void sort(int[] data) { &8^ch,+pD
int[] temp=new int[data.length]; KfkE'_F
mergeSort(data,temp,0,data.length-1); m=.}}DcSs
} r|!r!V8j
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private void mergeSort(int[] data, int[] temp, int l, int r) { @cT= t0*
int i, j, k; zbM*/:Y
int mid = (l + r) / 2; BMlu>,
if (l == r) n"P29"
return; ' +*,|;?
if ((mid - l) >= THRESHOLD) (bBr O74lR
mergeSort(data, temp, l, mid); KWzJ
else Z.v2!u
insertSort(data, l, mid - l + 1); Ag#o&Y
if ((r - mid) > THRESHOLD) MV.$Ay
mergeSort(data, temp, mid + 1, r); ZZJXd+Q}
else ;s(uaC3
insertSort(data, mid + 1, r - mid); v@KP~kp
5Rc^5Nv
for (i = l; i <= mid; i++) { ;p U=>
temp = data; hr)CxsPoRQ
} sH}q&=
for (j = 1; j <= r - mid; j++) { :lGH31GG
temp[r - j + 1] = data[j + mid]; 2-#:Y
} <Z6tRf;B
int a = temp[l]; Pu-/*Fx
int b = temp[r]; V`;$Ua;y
for (i = l, j = r, k = l; k <= r; k++) { MlBw=Nr
if (a < b) { !`VC4o
data[k] = temp[i++]; tq^d1b(j4
a = temp; m?$peRn3{
} else { vxrRkOU1
data[k] = temp[j--]; 5|^{t00T~
b = temp[j]; ./!6M
} _s> ZY0
} _/iw=-T
} >*"6zR2 o
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/** OalBr?^
* @param data 83ajok4E
* @param l QoVRZ$!p
* @param i FYtf<C+
*/ iH#b"h{w
private void insertSort(int[] data, int start, int len) { 14,Pf`5Sz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'z}Hg *
} }CyS_Tc
} 6-w'?G37
} N1Pm4joH%
} 0-9.u`)#yu
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堆排序： D]UqM<0Rz
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package org.rut.util.algorithm.support; D" 4*&
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import org.rut.util.algorithm.SortUtil; 49("$!
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/** Qn*a#]p
* @author treeroot p@se 5~
* @since 2006-2-2 5v uB87`
* @version 1.0 qXQ/M]
*/ k;?Oi?]
public class HeapSort implements SortUtil.Sort{ \f AL:mJ
Z_F}Y2-w9
/* (non-Javadoc) ~SW_jiKM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <e:2DB&
*/ ERE1XOe=D
public void sort(int[] data) { [v!TQwMU
MaxHeap h=new MaxHeap(); u VZouw#
h.init(data); C;3>q*Am4
for(int i=0;i h.remove(); =CE(M},d
System.arraycopy(h.queue,1,data,0,data.length); fzVU9BU
} ZPISclSA+
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private static class MaxHeap{ p`i_s(u
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void init(int[] data){ g+-=/Ge
this.queue=new int[data.length+1]; ,VM)ZK=Tr
for(int i=0;i queue[++size]=data; c&o|I4|Y,
fixUp(size); 3N]
} %!>~2=Q2*
} _Wjd`*
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private int size=0; !QB(M@1
0H6^2T<
private int[] queue; 1{.=T&eG#
mu1Lgs$;
public int get() { 8>}^W
return queue[1]; s]X]jfA.
} 0uf'6<fR
( _{\tgSm
public void remove() { r95l.v
SortUtil.swap(queue,1,size--); "^~>aVuXf
fixDown(1); 7D;g\{>M
} j3W)5ZX
file://fixdown E!eBQ[@
private void fixDown(int k) { 'kD~tpZ
int j; #jja#PF]7
while ((j = k << 1) <= size) { O-M4NKl]6
if (j < size %26amp;%26amp; queue[j] j++; $C_t1
if (queue[k]>queue[j]) file://不用交换 ]/p)XHKo
break; )cMW,
SortUtil.swap(queue,j,k); F_Q?0 Do0'
k = j; $=?CW(
} :PrQ]ss@C5
} !U@?Va~Zn
private void fixUp(int k) { E,#J$'z
while (k > 1) { WaVP+Ap
int j = k >> 1; 0wzq{~\{=_
if (queue[j]>queue[k]) S'I{'jP5
break; +N9(o+UrU
SortUtil.swap(queue,j,k); ,AC+s"VS
k = j; 9*@Kl`\
} -'tgr6=|w"
} bIP'(B#1K
ZjE!? '(ef
} 4I>I
9Fl}"p[>L.
} X:*Ut3"
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SortUtil： }<EA)se"
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package org.rut.util.algorithm; y<G@7?
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import org.rut.util.algorithm.support.BubbleSort; b ;Vy=f
import org.rut.util.algorithm.support.HeapSort; $?l?
import org.rut.util.algorithm.support.ImprovedMergeSort; sW":~=H
import org.rut.util.algorithm.support.ImprovedQuickSort; ugM,wT&~Y
import org.rut.util.algorithm.support.InsertSort; dz',!|>
import org.rut.util.algorithm.support.MergeSort; v@43%`"Gj
import org.rut.util.algorithm.support.QuickSort; tNskB`541
import org.rut.util.algorithm.support.SelectionSort; u"%i3%Yjh
import org.rut.util.algorithm.support.ShellSort; kQRkby
X^PR];V:$
/** 0;Y|Ua[G+~
* @author treeroot x+}6qfc$9k
* @since 2006-2-2 :eK;:pN
* @version 1.0 QES[/i +
*/ L`yyn/2>
public class SortUtil { y7I')}SC
public final static int INSERT = 1; |]5g+sd
public final static int BUBBLE = 2; HR85!S`
public final static int SELECTION = 3; rurC! -
public final static int SHELL = 4; 4s<*rKm~
public final static int QUICK = 5; kq[*q-:"x
public final static int IMPROVED_QUICK = 6; hCX}*
public final static int MERGE = 7; CW(]6s u{
public final static int IMPROVED_MERGE = 8; xud
public final static int HEAP = 9; U!"+~d)
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public static void sort(int[] data) { nj*B-M\p
sort(data, IMPROVED_QUICK); H1PW/AW
} Z6}B}5@y
private static String[] name={ -Bqn^ E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lE+v@Kb:
}; V`KXfY
=OIxG}*
private static Sort[] impl=new Sort[]{ 7XE/bhe%S
new InsertSort(), "}i\"x;s
new BubbleSort(), Go}C{(4T
new SelectionSort(), I$4GM
new ShellSort(), _LV;q! /j
new QuickSort(), =Tf uwhV
new ImprovedQuickSort(), af]&3(33
new MergeSort(), *`:zSnu
new ImprovedMergeSort(), iPMI$
new HeapSort() T jO}P\p
}; s4 o-*1R*`
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public static String toString(int algorithm){ 6]dK,
return name[algorithm-1]; 8X`Gm!)
} c <[?Z7y
@Z.s:FV[
public static void sort(int[] data, int algorithm) { |IqQ%;H
impl[algorithm-1].sort(data); .(tga&]
} S1pikwB
7E$ e1=
public static interface Sort { !2WRxM
public void sort(int[] data); ~_P,z?
} 7FMg6z8~
L$7 NT}L
public static void swap(int[] data, int i, int j) { I U/HYBJH
int temp = data; 1(`>9t02/?
data = data[j]; U:eahK
data[j] = temp; 4/$ $?w4
} v\#69J5.>)
} >dol