[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; ;.xoN|Per
} |qZko[W}=
int i1=l; b'MSkEiQG
int i2=mid+1; PB%-9C0
for(int cur=l;cur<=r;cur++){ L %ip>
if(i1==mid+1) ReiB $y6
data[cur]=temp[i2++]; +^*iZ6{+7
else if(i2>r) PJxH7|GSi
data[cur]=temp[i1++]; 5@*'2rO&!
else if(temp[i1] data[cur]=temp[i1++]; Hf'G8vW
else (~zd6C1.
data[cur]=temp[i2++]; K{n{KB&_&
} m9U"[Huv1E
} G?f\>QSZ
q$1PG+-
} Z_\C*^
?JL7=o X
改进后的归并排序: J=.`wZQkS
^pn(=4
package org.rut.util.algorithm.support; tiN?/
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import org.rut.util.algorithm.SortUtil; LIg{J%
ZmOfEg|h\
/** OD']:
* @author treeroot tXJUvish
* @since 2006-2-2 y_xnai
* @version 1.0 aP'"G^F
*/ 0]D0{6x8
public class ImprovedMergeSort implements SortUtil.Sort { 8|E'>+ D_-
.jy]8S8[|%
private static final int THRESHOLD = 10; yj4+5`|f
%|G"-%_E
/* Ax!+P\\2~
* (non-Javadoc) !`!| Zw
* .]aF 1}AI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @EE."T9
*/ -hC,e/+
public void sort(int[] data) { olLfko4$*V
int[] temp=new int[data.length]; qY\f'K}Q*
mergeSort(data,temp,0,data.length-1); b64 @s2]
} x `V;Y]7'
}|%eCVB
private void mergeSort(int[] data, int[] temp, int l, int r) { ?g!V!VS2
int i, j, k; iH^z:%dP
int mid = (l + r) / 2; ''\;z<v
if (l == r) &3J@BMYp
return; drsB/
if ((mid - l) >= THRESHOLD) R |KD&!~Z
mergeSort(data, temp, l, mid); 9&RFO$WH
else 29XL$v],
insertSort(data, l, mid - l + 1); ?FfC
if ((r - mid) > THRESHOLD) wP"dZagpj
mergeSort(data, temp, mid + 1, r); r\nx=
else ie-vqLc
insertSort(data, mid + 1, r - mid); zE;bBwy&
#+$Q+Z|6k
for (i = l; i <= mid; i++) { v&Kqq!DE
temp = data; !mXxAo
} }w4QP+ x
for (j = 1; j <= r - mid; j++) { \M'-O YH_[
temp[r - j + 1] = data[j + mid]; )Ud-}* g
} K'#E3={tt
int a = temp[l]; +H$!a
int b = temp[r]; =IAsH85Q
for (i = l, j = r, k = l; k <= r; k++) { qY 4#V k
if (a < b) { $=?@*p
data[k] = temp[i++]; [pVamE
a = temp; /c):}PJ^#7
} else { ja=F7Usb
data[k] = temp[j--]; XD"_Iq!
b = temp[j]; G%d (
} 'l,V*5L
} u^029sH6j
} BB|?1"neg
#p[',$cC
/** wgd/(8d
* @param data Fd*8N8Pi
* @param l M:5b4$Qh<
* @param i C*nB
*/ 'mV9{lj7E
private void insertSort(int[] data, int start, int len) { If%/3UJ@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z4IgBn(Z_}
} '=P7""mN5
} 1 hg}(Hix
} JmEj{K<3I
} F:mq'<Q
0Ia($.1mY
堆排序： q\H[am
,]b~t0|B
package org.rut.util.algorithm.support; k%^lF?_0I
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import org.rut.util.algorithm.SortUtil; Fv<`AU
x`6<m!d`
/** ]vuwkn+)
* @author treeroot _ 84ut
* @since 2006-2-2 /rSH"$
* @version 1.0 Ks}Xgc\
*/ ,-z9 #t
public class HeapSort implements SortUtil.Sort{ KF4PJi;*
^wS5>lf7p
/* (non-Javadoc) Is+O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N!`e}Z6S
*/ z3uW)GQ.
public void sort(int[] data) { yv)ux:P&+
MaxHeap h=new MaxHeap(); sN5B7)Vc
h.init(data); CW<N: F.9
for(int i=0;i h.remove(); wb~@7,D
System.arraycopy(h.queue,1,data,0,data.length); J:skJ.Wx
} puT'y
8mQmi`
private static class MaxHeap{ 6]-SK$
ur$l Z0
void init(int[] data){ Afk$?wkL
this.queue=new int[data.length+1]; yV^s,P1
for(int i=0;i queue[++size]=data; t'ZWc\
fixUp(size); )aX,%yK
} S6[v;{xJ
} >|;aIa@9
EAeqLtFqs
private int size=0; ?mlNL/:
h>Hb`G<
private int[] queue; -1J[n0O.
+T8B:
public int get() { uw2hMt (N
return queue[1]; xpOg8u5
} }K3x
>a}f{\Q
public void remove() { @/k@WhFZ
SortUtil.swap(queue,1,size--); 5ms""LD/
fixDown(1); @Pt="*g
} GH[wv<
file://fixdown ~}<DG1!
private void fixDown(int k) { uIZWO.OdU
int j; <ZB1Vi9}8
while ((j = k << 1) <= size) { 5YrBW:_OI
if (j < size %26amp;%26amp; queue[j] j++; }*L(;r)q
if (queue[k]>queue[j]) file://不用交换 <qGu7y"
break; y{N-+10z
SortUtil.swap(queue,j,k); q&d~ \{J
k = j; 6&/T@LQYrh
} nMJ#<'v^!2
} P+$:(I
private void fixUp(int k) { o*J3C>
while (k > 1) { )wNP( @$L
int j = k >> 1; A,4fEmWM
if (queue[j]>queue[k]) ){UcS/GI=
break; &-;5* lg)0
SortUtil.swap(queue,j,k); ttu&@ =
k = j; :>=\.\
} Q1+dCCY#F
} v;)..X30
@9"J|}
} O?|gp<=d
f!JS= N?3
} g1(IR)U!z
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SortUtil： _]:z \TDn
k1!@^A
package org.rut.util.algorithm; Sy 'Dp9!|
o>VVsH
import org.rut.util.algorithm.support.BubbleSort; G["c\Xux
import org.rut.util.algorithm.support.HeapSort; w`5xrqt@
import org.rut.util.algorithm.support.ImprovedMergeSort; Ih"XV
import org.rut.util.algorithm.support.ImprovedQuickSort; Sm5H_m!
import org.rut.util.algorithm.support.InsertSort; ' MxrQ;|S
import org.rut.util.algorithm.support.MergeSort; ,S!azN=
import org.rut.util.algorithm.support.QuickSort; }+sT4'Ah>
import org.rut.util.algorithm.support.SelectionSort; Er{>p|n=
import org.rut.util.algorithm.support.ShellSort; 1@-Ns
<%"b9T`'
/** hq #?kN
* @author treeroot \o^2y.q:>
* @since 2006-2-2 j*vYBGD
* @version 1.0 qo|WXwP2
*/ =y-@AU8
public class SortUtil { $b mLu=9
public final static int INSERT = 1; Cid ;z
public final static int BUBBLE = 2; GmP@;[H"
public final static int SELECTION = 3; 8Q'0h m?
public final static int SHELL = 4; {yExQbN
public final static int QUICK = 5; %QP0
public final static int IMPROVED_QUICK = 6; Pjc Tx +
public final static int MERGE = 7; .qZI$ l.
public final static int IMPROVED_MERGE = 8; J_4!2v!6e
public final static int HEAP = 9; FIsyiSY<j
kbe-1 <72
public static void sort(int[] data) { {Ja!~N;3
sort(data, IMPROVED_QUICK); 1|jt"Hz
} Dbz3;t
private static String[] name={ ^t#&@-'(d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $\U4hHOo
}; c-0#w=
>o=-$gz`
private static Sort[] impl=new Sort[]{ #}y2)g
new InsertSort(), Sb82}$sO
new BubbleSort(), {.INnFGP@)
new SelectionSort(), nX`u[ks
new ShellSort(), ]@u6HH~^
new QuickSort(), +csi[c)3E
new ImprovedQuickSort(), #%h-[/
new MergeSort(), h3xAJ!
new ImprovedMergeSort(), h[@tZ(jrY
new HeapSort() 9'X7wG
}; &eX!#nQ_.
|Ur"& Z{
public static String toString(int algorithm){ {fjdr
return name[algorithm-1]; BNs@n"k
} V6,H}k
fd.^h*'mU
public static void sort(int[] data, int algorithm) { ]%u@TK7
impl[algorithm-1].sort(data); ,]d/Q<
} @W"KVPd
z+n,uHs
public static interface Sort { Jh!I:;/
public void sort(int[] data); lE(a%'36
} W~7A+=&
}xh$T'M8
public static void swap(int[] data, int i, int j) { oc>{?.^
int temp = data; ,1+y/{S
data = data[j]; )`O~f_pIC
data[j] = temp; .0`m\~L
} 2$ze= /l
} )u`[6,d