[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; j8Pqc]
} CG#lpAs
int i1=l; <O<Kf:i&c1
int i2=mid+1; |h^[/
for(int cur=l;cur<=r;cur++){ 6ijL+5
if(i1==mid+1) 1`6kc9f.
data[cur]=temp[i2++]; sF.oZ>
else if(i2>r) \NZ(Xk
data[cur]=temp[i1++]; >T{Gl/? p
else if(temp[i1] data[cur]=temp[i1++]; f%,Vplb
else ,gO}H)v]t
data[cur]=temp[i2++]; 2uSXC*Phz
} c/Dk*.xy<
} O$eNG$7
\_vjc]?
} L<D<3g|4
8NF93tqD6
改进后的归并排序: 7C;oMh5
SI)QX\is8
package org.rut.util.algorithm.support; srbES6
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import org.rut.util.algorithm.SortUtil; 5S9i>B
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/** ^Uq%-a
* @author treeroot fk*I}pDx
* @since 2006-2-2 KIRCye
* @version 1.0 ;{L~|q J
*/ s78MXS?py
public class ImprovedMergeSort implements SortUtil.Sort { 6 4,('+
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private static final int THRESHOLD = 10; !k3 eUBF
cy-o@U"s8
/* &u`]Zn
* (non-Javadoc) Ei HQ&u*
* kuq&8f~!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2`'g 9R
*/ B}(r>8?dm
public void sort(int[] data) { /nq\*)S#&
int[] temp=new int[data.length]; ?<;9=l\Q
mergeSort(data,temp,0,data.length-1); QjlQsN!
} 8l.bT|#O
N%f% U
private void mergeSort(int[] data, int[] temp, int l, int r) { n 9>**&5L
int i, j, k; C^IPddw>
int mid = (l + r) / 2; W5*Kq^6Pd
if (l == r) \V(w=
return; ""f'L,`{.
if ((mid - l) >= THRESHOLD) P:#KBF;a
mergeSort(data, temp, l, mid); :{LNr!I?I
else \:BixBU7
insertSort(data, l, mid - l + 1); \; voBU
if ((r - mid) > THRESHOLD) u<['9U
mergeSort(data, temp, mid + 1, r); ""@kBY1C
else \<aR^Sj.
insertSort(data, mid + 1, r - mid); <rihi:4K
{Mpx33
for (i = l; i <= mid; i++) { ~dBx<
temp = data; wi/qI(O!
} U-*`I?~=4
for (j = 1; j <= r - mid; j++) { eKUP,y;[I
temp[r - j + 1] = data[j + mid]; ~tc,p
} Yycfb
int a = temp[l]; V/&JArW
int b = temp[r]; ]*Cq'<h$
for (i = l, j = r, k = l; k <= r; k++) { '" 4;;(
if (a < b) { [C#H _y(
data[k] = temp[i++]; r!<)CT}D
a = temp; diWi0@
} else { OZR{+YrB^
data[k] = temp[j--]; vbh 5
b = temp[j]; L9$`zc
} [xdi.6%
} PX- PVW
} V7"^.W*
/UqIkc
/** 4KX\'K
* @param data %Ze]6TP/><
* @param l w{WEYS
* @param i ,hOi5,|?L
*/ ElA(1o|9I
private void insertSort(int[] data, int start, int len) { 9vckQCLM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g)1`A24
} sj3[ny;b
} yBRYEqS+
} h0&Oy52
} /,,IM/(6^
C"QB`f:
堆排序： onU\[VvM
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package org.rut.util.algorithm.support; 6)veuA3]
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import org.rut.util.algorithm.SortUtil; [X 9zrGHt
g/4ipcG;N
/** cN:dy#
* @author treeroot E*x ct-m#
* @since 2006-2-2 74=zLDDS
* @version 1.0 c2u*<x
*/ {G+iobQdd
public class HeapSort implements SortUtil.Sort{ /5Sd?pW;
[(2XL"4D
/* (non-Javadoc) jN AS'JV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6~-,.{Y
*/ 5.LfN{gE)
public void sort(int[] data) { +1]A$|qyW
MaxHeap h=new MaxHeap(); R2A#2{+H
h.init(data); X4<Y5?&0
for(int i=0;i h.remove(); {TZV^gT4
System.arraycopy(h.queue,1,data,0,data.length); DB+oCE<.#
} bao"iv~z
FeNNzV=
private static class MaxHeap{ qfX26<q
"QvTn=
void init(int[] data){ >9NC2%61S
this.queue=new int[data.length+1]; "&/lF[q
for(int i=0;i queue[++size]=data; @A|#/]S1
fixUp(size); &~c`p[
} W9QVfe#s
} 81H9d6hqcD
DP-0,Gt&Xj
private int size=0; N9s+Tm
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private int[] queue; DKF` xuJP
[$c"}=g[+
public int get() { &`,Y/Cbw
return queue[1]; @*E=O|
} Sf*gAwnW
Q ZC\%X8j
public void remove() { 6!se,SCvw
SortUtil.swap(queue,1,size--); -ykD/
fixDown(1); *,zrg%8
} e{H(
file://fixdown n]6-`fpD
private void fixDown(int k) { B1A:}#
int j; lL&U ioo}D
while ((j = k << 1) <= size) { s!S_Bt):3
if (j < size %26amp;%26amp; queue[j] j++; DYoGtks(
if (queue[k]>queue[j]) file://不用交换 dQz#&&s-
break; {:|b,ep T
SortUtil.swap(queue,j,k); tXuf!
k = j; .Q^V,[on1T
} fRT4>So
} K $WMrp
private void fixUp(int k) { +4Fw13ADE
while (k > 1) { 1Ko4O)L]&
int j = k >> 1; &WeN{
if (queue[j]>queue[k]) G+2 ,x0(
break; hV+=hX<h
SortUtil.swap(queue,j,k); K) Ums-b
k = j; !L@<?0xLW
} Bg] %
} Ylyk/
gZiwXb
} X:lStO#5
Y^nm{;G+
} GKKDO+A=!
?\kuP ?\
SortUtil： <xe_t=N
Cg|\UKfy$
package org.rut.util.algorithm; LIrebz
|MOz>1<a
import org.rut.util.algorithm.support.BubbleSort; UZs'H"K
import org.rut.util.algorithm.support.HeapSort; -L<FVB
import org.rut.util.algorithm.support.ImprovedMergeSort; LJom+PxF$x
import org.rut.util.algorithm.support.ImprovedQuickSort; *<[zG7+&[
import org.rut.util.algorithm.support.InsertSort; t 4VeXp6
import org.rut.util.algorithm.support.MergeSort; /::Y &&$f
import org.rut.util.algorithm.support.QuickSort; 4U16'd
import org.rut.util.algorithm.support.SelectionSort; WEJ-K<A(
import org.rut.util.algorithm.support.ShellSort; !iq|sXs
#G_'5{V
/** T|0+o+i
* @author treeroot ]1pB7XL
* @since 2006-2-2 1w,34*-}
* @version 1.0 AF8:bk,R
*/ eco&!R[G
public class SortUtil { [[pt~=0
public final static int INSERT = 1; !.-u'6e
public final static int BUBBLE = 2; 'kco. 1{
public final static int SELECTION = 3; "$aoIXv
public final static int SHELL = 4; B,&QI&k`~
public final static int QUICK = 5; y=.bn!u}z
public final static int IMPROVED_QUICK = 6; J .VZD
public final static int MERGE = 7; O;5lF
public final static int IMPROVED_MERGE = 8; ?;H}5>^8P
public final static int HEAP = 9; x7Gf):,LK
ktS^^!,l%
public static void sort(int[] data) { L|}s Z\2!
sort(data, IMPROVED_QUICK); [[w |
} 3<xDxj0<
private static String[] name={ >x3lA0m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B^]PKjLNZ
}; fUGappb
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private static Sort[] impl=new Sort[]{ YaL:6[6
new InsertSort(), OScqf]H
new BubbleSort(), s2GF*{
new SelectionSort(), (KwC,0p
new ShellSort(), =Xg/[J%
new QuickSort(), 0:>hK\F#
new ImprovedQuickSort(), 4P"bOt5izR
new MergeSort(), kN78j
new ImprovedMergeSort(), I{r*Y9
new HeapSort() l^OflZC~
}; ZHa>8x;Mjl
Yb4ku7}
public static String toString(int algorithm){ M0~%[nX
return name[algorithm-1]; !_QT{H
} 77y+ik
N_S~&(I|
public static void sort(int[] data, int algorithm) { RGs7Hc
impl[algorithm-1].sort(data); ? dHl'
} wwywiFj
aidQ,(PDj
public static interface Sort { AS@(]T#R
public void sort(int[] data); 2%L`b"9}V
} beC%Tnb7
)XGz#C_P
public static void swap(int[] data, int i, int j) { Lt=32SvTn
int temp = data; 1YJ?Y
data = data[j]; biU_ImJ>0
data[j] = temp; |Tc4a4jS
} zL9~gJ
} $+_1F`