[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; ;\]b T;#
} MCS8y+QK
int i1=l; ;D:9+E<>a
int i2=mid+1; \HKxh:F'
for(int cur=l;cur<=r;cur++){ Y0x%sz5
if(i1==mid+1) 5Ow[~p"l<
data[cur]=temp[i2++]; `8AR_7i
else if(i2>r) hp#W9@NR
data[cur]=temp[i1++]; %k;|\%B`
else if(temp[i1] data[cur]=temp[i1++]; *h'=3w:G
else *M:B\D
data[cur]=temp[i2++]; )L#i%)+
} =p*]Az
} AS =?@2 q
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} Xc?&_\. +
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改进后的归并排序: T)H{
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package org.rut.util.algorithm.support; $,,op(
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import org.rut.util.algorithm.SortUtil; Fs9I7~L3
"uaMk}[ <!
/** gDQ1?N'8{t
* @author treeroot 5*Y^\N
* @since 2006-2-2 d@5[B0eH
* @version 1.0 $npT[~U5
*/ Dp)=0<$y
public class ImprovedMergeSort implements SortUtil.Sort { 8=NM|i
gj*+\3KO@a
private static final int THRESHOLD = 10; 1JztFix
xT
/* /ro=?QYb
* (non-Javadoc) m9.{[K"
* n ~shK<!C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -'t)=YJ
*/ gk"$,\DI
public void sort(int[] data) { (NF~Ck$#q
int[] temp=new int[data.length]; _3TY,l~
mergeSort(data,temp,0,data.length-1); ";3zXk[#
} vUohtS*
`< xn8h9p
private void mergeSort(int[] data, int[] temp, int l, int r) { "|qqUKJZ
int i, j, k; nlW +.a[
int mid = (l + r) / 2; 7ccO93Mz
if (l == r) j2QmxTa!
return; /SrCElabP
if ((mid - l) >= THRESHOLD) 1Cv-
mergeSort(data, temp, l, mid); ?u" 4@
else mF,Y?ax
insertSort(data, l, mid - l + 1); K`u(/kz/<
if ((r - mid) > THRESHOLD) `HZ;NRr
mergeSort(data, temp, mid + 1, r); |}(`kW
else k'Sp.
insertSort(data, mid + 1, r - mid); |wH5sjT
0{,Z{&E
for (i = l; i <= mid; i++) { dep=&
temp = data; (Iaf?J5{
} Hn5|B 3vN
for (j = 1; j <= r - mid; j++) { @d mV
temp[r - j + 1] = data[j + mid]; (9Ux{@$o[
} _j< K=){
int a = temp[l]; G 8g<>d{j
int b = temp[r]; VQ7*Z5[1
for (i = l, j = r, k = l; k <= r; k++) { B9NWW6S
if (a < b) { g*03{l#P
data[k] = temp[i++]; inh=WUEW
a = temp; Z0Vl+
} else { |mGFts}0o'
data[k] = temp[j--]; $}>+kHoT{
b = temp[j]; }bdmomV
} W-?()dX{
} ]6TATPIr
} ms*(9l.hOK
_kU:Z
/** o<COm9)i
* @param data _'{_gei_P
* @param l amOnqH-(
* @param i ]yK7PH-{L
*/ BG6B:
private void insertSort(int[] data, int start, int len) { BD_Iz A<wK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NQ(1
} GP?M!C,/}k
} DU5c=rxW
} El.hu%#n*G
} Ju96#v+:
]rWgSID
堆排序： 8FKXSqhVM
zgNc4B
package org.rut.util.algorithm.support; RS)tO0
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import org.rut.util.algorithm.SortUtil; K 1 a\b"
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/** 5ni~Q 9b
* @author treeroot T 6)bD&
* @since 2006-2-2 6p?,(
* @version 1.0 5nT"rA
*/ d1AioQ9
public class HeapSort implements SortUtil.Sort{ iOU6V
mz,
/* (non-Javadoc) \m(VdE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1*'HL#
*/ gtk7)Uh
public void sort(int[] data) { Q=AavKn#
MaxHeap h=new MaxHeap(); :S<f?* }:
h.init(data); gl\\+VyU
for(int i=0;i h.remove(); V@zg}C|e
System.arraycopy(h.queue,1,data,0,data.length); iBF|&h(\
} ^@3sT,M,S
sz:g,}~h
private static class MaxHeap{ :Av#j@#
]s'Q_wh_-v
void init(int[] data){ yeXx',]a
this.queue=new int[data.length+1]; t&H?\)!4
for(int i=0;i queue[++size]=data; 5ymk\Lw
fixUp(size); 7gj4j^a^]{
} AgS7J(^&3
} 4]?<hH9
a%kQl^I4
private int size=0; =]6%G7T
+x0!*3q
private int[] queue; {1UQ/_
F5P[dp-`1
public int get() { 06O2:5zF
return queue[1]; JMrEFk
} \NgYTZ
N5Q[nd
public void remove() { =/s>Q l
SortUtil.swap(queue,1,size--); s/$?^qtyC
fixDown(1); )bS yB29S
} ~Sj9GxTe
file://fixdown ?[@J8
private void fixDown(int k) { f .Q\Z'S^
int j; j[`j9mM8
while ((j = k << 1) <= size) { n^Hm;BiE#
if (j < size %26amp;%26amp; queue[j] j++; 6:b!F
if (queue[k]>queue[j]) file://不用交换 &e @2
break; TE3lK(f
SortUtil.swap(queue,j,k); d,+Hd2o^X
k = j; 5gYRwuf
} &e E=<x
} rp3V3]EE
private void fixUp(int k) { 0?s|i :
while (k > 1) { r[|Xy>Zj
int j = k >> 1; ',9V|jvK
if (queue[j]>queue[k]) gG0!C))8
break; BXtCSfY$
SortUtil.swap(queue,j,k); 3{'Ne}5%I
k = j; 5rw 7;'
} [tlI!~Z
} Bt@^+vH ~
Q# ~Q=T'<
} &dqLP95
C _'%NlJ'
} Of*Pw[vD
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SortUtil： _ TiuY
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package org.rut.util.algorithm; jyZ (RB
aS{|uE]
import org.rut.util.algorithm.support.BubbleSort; =bfJ^]R
import org.rut.util.algorithm.support.HeapSort; 7%5z p|3
import org.rut.util.algorithm.support.ImprovedMergeSort; E{XH?_xo
import org.rut.util.algorithm.support.ImprovedQuickSort; kZR8a(4D
import org.rut.util.algorithm.support.InsertSort; 'GNK"XA^
import org.rut.util.algorithm.support.MergeSort; +ieY:H[
import org.rut.util.algorithm.support.QuickSort; uGwm r
import org.rut.util.algorithm.support.SelectionSort; 6a[}'/
import org.rut.util.algorithm.support.ShellSort; +O8%Hm
u_@f$
/** !hJ+Lp_
* @author treeroot s^Y"'`+
* @since 2006-2-2 ]D?"aX'q>
* @version 1.0 ")SFi^]
*/ )#?"Gjf~
public class SortUtil { |n2qVR,
public final static int INSERT = 1; PQy4{0 _
public final static int BUBBLE = 2; -.1y(k^4E
public final static int SELECTION = 3; T-.%
public final static int SHELL = 4; Bal$+S
public final static int QUICK = 5; /Lfm&;
public final static int IMPROVED_QUICK = 6; kjIAep0rT
public final static int MERGE = 7; 2^r<{0@n
public final static int IMPROVED_MERGE = 8; 6</xL9#/
public final static int HEAP = 9; w mn+
%'bM){
public static void sort(int[] data) { c/D+|X*
sort(data, IMPROVED_QUICK); {j9{n
} 9+j0q%
private static String[] name={ ^]H5h]U'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f86XkECZ;`
}; D9<!mH
N4v~;;@(
private static Sort[] impl=new Sort[]{ 6V$Avg\6\
new InsertSort(), N(;1o.~
new BubbleSort(), ,vr? 2k
new SelectionSort(), h{CL{>d
new ShellSort(), = I:.X ;
new QuickSort(), urbp#G/>
new ImprovedQuickSort(), 51#_Vg
new MergeSort(), vx1c,8
new ImprovedMergeSort(), '.on)Zd.
new HeapSort() dzARI`
}; J1,9kCO
(/z_Q{"N
public static String toString(int algorithm){ o2nv+fyW
return name[algorithm-1]; o*b] p-
} *QpMF/<?
xe]y]
public static void sort(int[] data, int algorithm) { B;M?,<%FRU
impl[algorithm-1].sort(data); rA3$3GLQ-
} Jb0`42
tRs [ YK
public static interface Sort { lNz7u:U3
public void sort(int[] data); _tiujP
} :y+2*lV
]s]vZ
public static void swap(int[] data, int i, int j) { )P%ZA)l%_o
int temp = data; lG9bLiFY
data = data[j]; eX?OYDDC0j
data[j] = temp; Tl%`P_J)-S
} EMh7z7}Rr
} 4QH3fTv