[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; !>`N$-U X
} 7kK #\dI
int i1=l; ~+bGN
int i2=mid+1; +:-57
for(int cur=l;cur<=r;cur++){ u#A<hq;
if(i1==mid+1) -0Tnh;&=
data[cur]=temp[i2++]; M- 2Tz[
else if(i2>r) c$`4*6
data[cur]=temp[i1++]; 7,MS '2nz
else if(temp[i1] data[cur]=temp[i1++]; 0lsXCr_X
else ;k86"W
data[cur]=temp[i2++]; za9)Q=6FD
} )VK }m9Ae
} Za7q$7F7Bc
P^Q[-e{
} maY4g&'f
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改进后的归并排序: K+)%KP
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package org.rut.util.algorithm.support; q;D+ai
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import org.rut.util.algorithm.SortUtil; qG/fE'(j&
Hiv!BV|
/** )wtaKF.-
* @author treeroot m8JR@!t7
* @since 2006-2-2 u=NSsTP&
* @version 1.0 j9U%7u]-k
*/ qXW})(
public class ImprovedMergeSort implements SortUtil.Sort { J.+BD\pa
=GBI0&U
private static final int THRESHOLD = 10; z6~ H:k1G%
XJ+6FT/qss
/* %77p5ctW
* (non-Javadoc) $RwB_F
* oi&Wo'DX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &Q=ZwC7#
*/ (zYy}g#n
public void sort(int[] data) { ]:$ O{y
int[] temp=new int[data.length]; L~/qGDXC?
mergeSort(data,temp,0,data.length-1); b*mKei
} >x@P|\
F;!2(sPS
private void mergeSort(int[] data, int[] temp, int l, int r) { Q U F$@)A
int i, j, k; W*:,m8wk
int mid = (l + r) / 2; LFp]7Dq
if (l == r) ~;OYtz
return; /_-;zL
if ((mid - l) >= THRESHOLD) rf9_eP
mergeSort(data, temp, l, mid); (|fm6$
else Ld,5iBiO:
insertSort(data, l, mid - l + 1); B 2.q3T
if ((r - mid) > THRESHOLD) ;#)mLsl
mergeSort(data, temp, mid + 1, r); Ti;Ijcq8
else fKa\7{R
insertSort(data, mid + 1, r - mid); xg{HQQ|TC
j?|* LT$%7
for (i = l; i <= mid; i++) { -(JUd4#
temp = data; {,j6\Cj4
} Pe~`16f
for (j = 1; j <= r - mid; j++) { k)FmDX
temp[r - j + 1] = data[j + mid]; kF V7l
} LDy<k=;o
int a = temp[l]; @TA9V@?)
int b = temp[r]; +|%Sx
for (i = l, j = r, k = l; k <= r; k++) { kDYN>``biP
if (a < b) { ,rwuy[Q8
data[k] = temp[i++]; w[Ep*-yeI
a = temp; 2o[IHO]
} else { GfyX'(ge
data[k] = temp[j--]; |\uYv|sT
b = temp[j]; Er:?M_ev
} =S]a&*M
} Px'!;
} F[7x*-NO-
bT!($?GNdg
/** snp v z1iS
* @param data d2ENm%q*PX
* @param l [{<dbW\ 9
* @param i 6a>H|"PNE
*/ W*xX{$NL
private void insertSort(int[] data, int start, int len) { >^"BEG9i:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M`,XyIn
} =j /hl
} I7\ &Z q
} &,-p',\-
} #G,XDW2"w
xwzT#DXGJ
堆排序： Rh] P8
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package org.rut.util.algorithm.support; ;? uC=o>Z{
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import org.rut.util.algorithm.SortUtil; OalP1Gy
FX,$_:f6Y
/** _8h8Wtif
* @author treeroot X`\:_|
* @since 2006-2-2 8]0:1 {@
* @version 1.0 %W|DJ\l8"
*/ %bX0 mN
public class HeapSort implements SortUtil.Sort{ GG'Sp53GE
=!-5+I#e
/* (non-Javadoc) ~ |,e_ zA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,R-Y~+!
*/ h<[+HsI
public void sort(int[] data) { `:-J+<`
MaxHeap h=new MaxHeap(); 1}`LTPW9
h.init(data); RyRqH:p)3
for(int i=0;i h.remove(); cvAtwQ'
System.arraycopy(h.queue,1,data,0,data.length); voRfjsS~
} ":d*dl
jgvh[@uB?
private static class MaxHeap{ :?r*p>0$
(@ea|Fd#4
void init(int[] data){ j=.g:&r)
this.queue=new int[data.length+1]; )hL^+Nn bR
for(int i=0;i queue[++size]=data; !J.rM5K
fixUp(size); d0C8*ifFO
} '=TTa
} :+kUkb-/
o*7yax
private int size=0; i1/}XV
12r` )
private int[] queue; l6B.6 '4)w
T~Yg5J
public int get() { W<gD6+=8
return queue[1]; TJ2/?p\x
} iiwpSGFl]
yer> x
public void remove() { .g-3e"@
SortUtil.swap(queue,1,size--); L^KdMMz;
fixDown(1); -"Gl 4)
} L/k40cEI^z
file://fixdown WX*cICb5
private void fixDown(int k) { mvf _@2^
int j; hrlCKL&
while ((j = k << 1) <= size) { O~Uw&Bq
if (j < size %26amp;%26amp; queue[j] j++; 1XnBK$`
if (queue[k]>queue[j]) file://不用交换 nJ# XVlHc
break; >7FSH"8[,
SortUtil.swap(queue,j,k); -g2{681`r
k = j; G(i\'#5+
} lZ~+u
} t61'LCEis
private void fixUp(int k) { @c"yAy^t
while (k > 1) { h2}am:%mC
int j = k >> 1; *Ypqq
if (queue[j]>queue[k]) ~iT{8
break; .xv^G?GG
SortUtil.swap(queue,j,k); Z)v)\l9d
k = j; 0P:F97"1,
} 'j /q76uXV
} 9XN~Ln@}
2<.Vv\ =
} cJ4S!
)K.R\]XR
} CI1m5g [P
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SortUtil： cd"wNH-
2TCRS#z
package org.rut.util.algorithm; 5fxbA2\
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import org.rut.util.algorithm.support.BubbleSort; ?hSha)1:
import org.rut.util.algorithm.support.HeapSort; WA$ p_% r=
import org.rut.util.algorithm.support.ImprovedMergeSort; & ^!v*=z
import org.rut.util.algorithm.support.ImprovedQuickSort; 4O Zy&,
import org.rut.util.algorithm.support.InsertSort; &x/k^p=
import org.rut.util.algorithm.support.MergeSort; Y=WR6!{
import org.rut.util.algorithm.support.QuickSort; gx&73f<J
import org.rut.util.algorithm.support.SelectionSort; #y`k$20"
import org.rut.util.algorithm.support.ShellSort; e6es0D[>5
- coy@S=.'
/** K#U{<pUP
* @author treeroot ?',}?{"c
* @since 2006-2-2 p d%LL?O
* @version 1.0 D;yd{]<
*/ R]fYe#!"
public class SortUtil { Dpp@*xX>
public final static int INSERT = 1; @>9A$w$H|a
public final static int BUBBLE = 2; v*gLNB,ZH
public final static int SELECTION = 3; H.;yLL=
public final static int SHELL = 4; ?ZM^%]/+
public final static int QUICK = 5; Kk56/(_S
public final static int IMPROVED_QUICK = 6; kBUufV~
public final static int MERGE = 7; jM[f[
public final static int IMPROVED_MERGE = 8; qSCTFJ0
public final static int HEAP = 9; %1@.7uTN
n%8#?GC`
public static void sort(int[] data) { V'$oTZ`
sort(data, IMPROVED_QUICK); a#6,#Q"
} A9.;>8!u
private static String[] name={ 92NC]_jw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -q|*M:R
}; | )S{(#k
|<7i|J
private static Sort[] impl=new Sort[]{ >T$7{ ~
new InsertSort(), 3# :EK M~!
new BubbleSort(), <X9T-b"$h
new SelectionSort(), dR%q1Y&`
new ShellSort(), o|BFvhg
new QuickSort(), ="=#5C
new ImprovedQuickSort(), k@lXXII ?
new MergeSort(), ]qF<Zw7
new ImprovedMergeSort(), %G^(T%q| m
new HeapSort() 4I+.^7d
}; k.h^ $f
olslzXn7o
public static String toString(int algorithm){ +&zb^C`J
return name[algorithm-1]; !cv6 #:
} =NI.d>kvC
E{?L= ^cU
public static void sort(int[] data, int algorithm) { ~|J*E38
impl[algorithm-1].sort(data); @b>YkJDk
} TosPk(o(
tgS+"ugl
public static interface Sort { _;%.1H{N
public void sort(int[] data); R\i]O
} ENpaaW@!Y
4E,hcu
public static void swap(int[] data, int i, int j) { re2Fv:4{
int temp = data; |^\Hv5
data = data[j]; ``/y=k/au
data[j] = temp; ?cA8P.?^A
} aslNlH6
} _g^E%@'W