[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; 5,fzB~$TX(
} q&x#S_!
int i1=l; W u{nC
int i2=mid+1; Qc/J"<Lx
for(int cur=l;cur<=r;cur++){ ?Cl"jcQ*
if(i1==mid+1) 4H'&5
data[cur]=temp[i2++]; z<XS"4l?W
else if(i2>r) wN.Jyb
data[cur]=temp[i1++]; _JB3+0@
else if(temp[i1] data[cur]=temp[i1++]; \}c50}#0
else ~)(Dm+vZ
data[cur]=temp[i2++]; A>S2BL#=
} .w"O/6."
} 7qp|Msf},
.v!e=i}.
} XS@6jbLE
jR:Fih-}
改进后的归并排序: *2hzReM
u{^Kyo#v
package org.rut.util.algorithm.support; J>&GP#7}
o$;x[US
import org.rut.util.algorithm.SortUtil; 7?@v}%w
w=5qth7
/** 0}!lN{m?
* @author treeroot Er`PYE J
* @since 2006-2-2 nz+KA\iW
* @version 1.0 R8)"M(u=l
*/ HF:PF"|3
public class ImprovedMergeSort implements SortUtil.Sort { bv0 %{u&
^TGHWCK!t
private static final int THRESHOLD = 10; 1lM0pl6M
J %t1T]y~
/* XhiC'.B_
* (non-Javadoc) u""=9>0
* ZVL0S{V-mh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AseY.0
*/ "lt[)3*
public void sort(int[] data) { y{<7OTA)
int[] temp=new int[data.length]; kaLRI|hC
mergeSort(data,temp,0,data.length-1); lHU$A;
} &}ow-u9c3
Nx"?'-3Hm
private void mergeSort(int[] data, int[] temp, int l, int r) { X"]ZV]7(]s
int i, j, k; 622).N4
int mid = (l + r) / 2; [F$3mzx
if (l == r) e0P1FD<@
return; &2DW
if ((mid - l) >= THRESHOLD) *!/9?M{p
mergeSort(data, temp, l, mid); 2= _.K(
else %k~=iDk@
insertSort(data, l, mid - l + 1); wFD.3!
if ((r - mid) > THRESHOLD) B.o&%5dG
mergeSort(data, temp, mid + 1, r); GUxhCoxb
else sYL+;(#t
insertSort(data, mid + 1, r - mid); PSE![whK
bF.Aj8ZQ
for (i = l; i <= mid; i++) { $FoNEr&q
temp = data; \Z$*8z=
} eP)RP6ON{
for (j = 1; j <= r - mid; j++) { ZO,]h9?4
temp[r - j + 1] = data[j + mid]; B0:O]Ax6.^
} *\/UT
int a = temp[l]; cG<?AR?wDT
int b = temp[r]; pd|s7
for (i = l, j = r, k = l; k <= r; k++) { `7LdF,OdE
if (a < b) { hE;
data[k] = temp[i++]; bvoR?D\-"
a = temp; SF6n06UZu
} else { mVxS[Gq
data[k] = temp[j--]; m4EkL
b = temp[j]; (b(iL\B$D=
} |Bjb
} uwbj`lpf
} i}!CY@sW
nPKj%g3h
/** OlP#|x*
* @param data ]!/1qF
* @param l `0L!F"W
* @param i yEH30zSt
*/ EfOJ%Xr[,l
private void insertSort(int[] data, int start, int len) { %l>^q`p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8NLk`/
} noacnQ_I$
} !Ed';yfz\(
} >Zr`9$i
} v8LKv`I's
~($h9*\
堆排序： c[4Z_5B
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package org.rut.util.algorithm.support; "]sr4Jg=
Pd>hd0!.%
import org.rut.util.algorithm.SortUtil; n84*[d}t
$} ~:x_[
/** <jxTI%'f59
* @author treeroot 4B) prQ3
* @since 2006-2-2 =>4,/g3
* @version 1.0 ,<%],-Lt[
*/ 90Q}9T\
public class HeapSort implements SortUtil.Sort{ (}'0K?
`a] /e
/* (non-Javadoc) ibEQ52
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Kb-oM&^#
*/ kYx|`-PA<r
public void sort(int[] data) { [$B
MaxHeap h=new MaxHeap(); h T4fKc7P
h.init(data); 1SQ&mH/
for(int i=0;i h.remove(); E:#VS~
System.arraycopy(h.queue,1,data,0,data.length); 7GpSWM6
} 68d(6?OgW
iB{O"l@w
private static class MaxHeap{ =xg pr*
wuI+$?
void init(int[] data){ uS3J^=>@(a
this.queue=new int[data.length+1]; H~fZA)W 4Y
for(int i=0;i queue[++size]=data; ?NJ\l5'
fixUp(size); T~_+\w
} *joM[ML` 6
} %*zgN[/w
n hS=t8H
private int size=0; [/6IEt3}B
d-lC|5U%
private int[] queue; .pK_j~}P
cW%F%:b
public int get() { J1hc :I<;
return queue[1]; #X`j#"Ov2(
} x%5n&B
nTyKZ(#u
public void remove() { P'R!" #
SortUtil.swap(queue,1,size--); ^dld\t:tV7
fixDown(1); ]&jXD=a"
} vA*!82
file://fixdown d?.ewsC
private void fixDown(int k) { /V^Gn;
int j; Quqts(Q)+
while ((j = k << 1) <= size) { !D!Q]M5oU
if (j < size %26amp;%26amp; queue[j] j++; !SMIb(~[z
if (queue[k]>queue[j]) file://不用交换 T32C=7
break; W^Wr
SortUtil.swap(queue,j,k); cR*D)'/tl
k = j; P|Dw+lQj
} IXDj;~GF
} 7o-umZ}8
private void fixUp(int k) { *0^!%Y'/4
while (k > 1) { >,yE;zuw
int j = k >> 1; 9LI#&\lba
if (queue[j]>queue[k]) N7v7b<6
break; m0DD|7}+
SortUtil.swap(queue,j,k); Z%E;*R2+:>
k = j; mmE\=i~
} G~5EAeG
} ~oWCTj-
;'~U5Po8
} l 8qCg/ew
5|z>_f.^pS
} N_Q)AXr)
Z?ZiK1) K
SortUtil： 4jbqV
Ta8;
package org.rut.util.algorithm; <&^P1x<x
094~ s
import org.rut.util.algorithm.support.BubbleSort; +GqK$B(x7
import org.rut.util.algorithm.support.HeapSort; a|?&
import org.rut.util.algorithm.support.ImprovedMergeSort; W6%\Zwav?)
import org.rut.util.algorithm.support.ImprovedQuickSort; o b;]
import org.rut.util.algorithm.support.InsertSort; oM\b>*
import org.rut.util.algorithm.support.MergeSort; N1/)Fk-z
import org.rut.util.algorithm.support.QuickSort; v<CZ.-r\j
import org.rut.util.algorithm.support.SelectionSort; ?&A)%6` ~
import org.rut.util.algorithm.support.ShellSort; gCfAy=-,V
tQ~vLPi$
/** Sp/t[\,'
* @author treeroot }.*"ezaZw
* @since 2006-2-2 M~/7thP{
* @version 1.0 sT8(f=^)8F
*/ [.:SV|AF#
public class SortUtil { 0>{&8:
public final static int INSERT = 1; 9lXjB_wG>
public final static int BUBBLE = 2; B\^myg4
public final static int SELECTION = 3; )bqSM&SO
public final static int SHELL = 4; <KY \sb9
public final static int QUICK = 5; {o>51fXc)
public final static int IMPROVED_QUICK = 6; D/U=zDpiB
public final static int MERGE = 7; 3T1t !q4/5
public final static int IMPROVED_MERGE = 8; x;N@_FZ7KY
public final static int HEAP = 9; a9LK}xc={
''D\E6c\
public static void sort(int[] data) { [7Fx#o=da
sort(data, IMPROVED_QUICK); ;[nomxu|?
} SfTTB'9
private static String[] name={ k]>1@t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]F'o
}; ?58,Ja
/FJ.W<hw
private static Sort[] impl=new Sort[]{ 1Jm'9iy3
new InsertSort(), v[l={am{/
new BubbleSort(), 7=3'PfS
new SelectionSort(), ^+J3E4
new ShellSort(), WNnB s
new QuickSort(), sOVbz2\yb
new ImprovedQuickSort(), WMi$ATq
new MergeSort(), o|en"?4
new ImprovedMergeSort(), ioW&0?,Ym
new HeapSort() 1`& Yg(
}; h/goV
h4,g pV>t
public static String toString(int algorithm){ KT3n-Y-,
return name[algorithm-1]; ?zpN09e
} V|\dnVQ'-%
`*Ju0)g1
public static void sort(int[] data, int algorithm) { 5mqwNAv
impl[algorithm-1].sort(data); U0m 5Rc
} %|izt/B
9 $&$Fe
public static interface Sort { fW3awR{
public void sort(int[] data); "/kTEp
} ,&F4|{
'kb|!
public static void swap(int[] data, int i, int j) { xJ rKH
int temp = data; EEJ OJ<
data = data[j]; +tCNJ<S@l$
data[j] = temp; h_y;NB(w
} }7HR<%<7
} i-FsA