[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; k>CtWV5B
} Z :+#3.4$3
int i1=l; *$$V,6O.
int i2=mid+1; >[@d&28b%
for(int cur=l;cur<=r;cur++){ pb Ie)nK
if(i1==mid+1) ;#i$0~lRl
data[cur]=temp[i2++]; @GtZK
else if(i2>r) kwR@oVR^
data[cur]=temp[i1++]; vNSf:5H$
else if(temp[i1] data[cur]=temp[i1++]; z0[ZO1Fo(
else >2 qP
data[cur]=temp[i2++]; RWo B7{G
} !S-U8KI|
} [ d7]&i}*|
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} c7IR06E
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改进后的归并排序: }2,#[mM
6S[D"Q94
package org.rut.util.algorithm.support; 3= zQ U
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import org.rut.util.algorithm.SortUtil; pd3&AsU
"J{zfWr
/** a4RFn\4?
* @author treeroot U.'@S8
* @since 2006-2-2 n;`L5
* @version 1.0 3]es$Jy
*/ ]?`p_G3O
public class ImprovedMergeSort implements SortUtil.Sort { 7~nCK
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private static final int THRESHOLD = 10; 34kd|!e,
SYPMoE!U:
/* l|em E ^
* (non-Javadoc) /*^|5>-`i1
* Z;\"pP:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~J{[]wi
*/ WUS9zK
public void sort(int[] data) { _ng=5
int[] temp=new int[data.length]; C}'="g^=sl
mergeSort(data,temp,0,data.length-1); =>\-ma+
} /+`<X%^U
p30&JJ!~"
private void mergeSort(int[] data, int[] temp, int l, int r) { /t)c fFM
int i, j, k; ~"2@A F
int mid = (l + r) / 2; ca*[n~np
if (l == r) yGGB
return; :qTcxzV
if ((mid - l) >= THRESHOLD) (<ZkmIXN
mergeSort(data, temp, l, mid); 1DtMY|wP
else ko2j|*D6@~
insertSort(data, l, mid - l + 1); ]=VS~azZ5
if ((r - mid) > THRESHOLD) ?}v%JUcs
mergeSort(data, temp, mid + 1, r); >TnQ4^;v.
else |;m`874
insertSort(data, mid + 1, r - mid); 0DVZRB
&Z!K]OSY
for (i = l; i <= mid; i++) { H&Y{jqua
temp = data; CN~NyJL H
} PFy;qk
for (j = 1; j <= r - mid; j++) { 65#:2,s
temp[r - j + 1] = data[j + mid]; tlLn
} )z235}P
int a = temp[l]; {a8^6dm*E
int b = temp[r]; ]j2v"n
for (i = l, j = r, k = l; k <= r; k++) { Pph8"`mv.m
if (a < b) { TTZxkK
data[k] = temp[i++]; *8.@aX3
a = temp; ]_: TrH
} else { !aw#',r8m
data[k] = temp[j--]; N^(lUba
b = temp[j]; l()MYuLNV
} 2, "q_d'V
} o?mXxL)
} N46$EsO!h
k7|z$=zY
/** Gh[`q7B Q
* @param data _OU.JrqC
* @param l ;i9<y8Dha
* @param i Vm;Qw
*/ j-`X_8W
private void insertSort(int[] data, int start, int len) { ~J>gVg%66
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =Cy>$/H64
} tK|9qs<%
} 1m<?Q&|m$
} !H|82:`t+
} Ryba[Fz4Di
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堆排序： h>Uid &:?
vo6[2.HS
package org.rut.util.algorithm.support; .d~]e2x
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import org.rut.util.algorithm.SortUtil; xPDA475Cw3
F\=Rm
/** Ep\
* @author treeroot fHe0W
* @since 2006-2-2 FL#g9U>
* @version 1.0 Uy59zB2|=
*/ e4=FU&RpNH
public class HeapSort implements SortUtil.Sort{ ^/C$L8#
1 73<x){
/* (non-Javadoc) ,d>X/kd|o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?7kV+{.
*/ @9uYmkcV
public void sort(int[] data) { g7 Md
MaxHeap h=new MaxHeap(); -e{)v'C)
h.init(data); oa &z/`@
for(int i=0;i h.remove(); 9U=fJrj'u
System.arraycopy(h.queue,1,data,0,data.length); 5Hwo)S]r
} ? %+VG
Uc&6=5~Ys\
private static class MaxHeap{ D,dHP-v
+-aU+7tu
void init(int[] data){ =l8!VJa
this.queue=new int[data.length+1]; 833%H`jQc
for(int i=0;i queue[++size]=data; uojh%@.4
fixUp(size); wAu[pWD'6;
} xv$)u<Ve
} JXL9Gge
@Xve qUUU
private int size=0; I>H;o{X#
%|*nmIPq(
private int[] queue; Foe>}6~{?
dgco*TIGO
public int get() { v;fJM5PA
return queue[1]; s~Lfi.
} 4FIV
uS,p|}Q&
public void remove() { QOT)x4!)
SortUtil.swap(queue,1,size--); Ns.3s7&
fixDown(1); (}{_]X|e
} :vYtMp
file://fixdown >,>;)B@J
private void fixDown(int k) { aJ6#=G61l
int j; s-C!uq
while ((j = k << 1) <= size) { cXk6e.Uz
if (j < size %26amp;%26amp; queue[j] j++; ha|@ Xp
if (queue[k]>queue[j]) file://不用交换 .Na&I)udX.
break; S9HBr
SortUtil.swap(queue,j,k); -}Cc"qm
k = j; Mhe|eD#)
} ~5r=FF6
} <AI>8j6#B
private void fixUp(int k) { cQ(}^KO
while (k > 1) { -XBKOybHBO
int j = k >> 1; |;A9A's
if (queue[j]>queue[k]) DO&+=o`"
break; Hs"% S
SortUtil.swap(queue,j,k); NqJ<!q)
k = j; ptV4s=G2
} _{6,.TN
} U@.u-)oX
;RWW+x8IB
} 8%o~4u3
lo+xo;Nd
} FOCoiocPi
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SortUtil： "_K}rI6(t
m<FF$pTT
package org.rut.util.algorithm; ${hyNt
8W~lU~-
import org.rut.util.algorithm.support.BubbleSort; O9t=lrYV!
import org.rut.util.algorithm.support.HeapSort; N@Xg5huO
import org.rut.util.algorithm.support.ImprovedMergeSort; !uWxRpT,7
import org.rut.util.algorithm.support.ImprovedQuickSort; -|m$YrzG
import org.rut.util.algorithm.support.InsertSort; owE<7TGPI?
import org.rut.util.algorithm.support.MergeSort; 29"mE;j
import org.rut.util.algorithm.support.QuickSort; EHpu*P~W
import org.rut.util.algorithm.support.SelectionSort; YXF#c)#
import org.rut.util.algorithm.support.ShellSort; 44|deE3Z
2?GXkPF2;A
/** bnijM/73
* @author treeroot wL'oImE
* @since 2006-2-2 94Xjz(
* @version 1.0 `[WyHO|8
*/ Bj@x$v#/^
public class SortUtil { <fNGhmL
public final static int INSERT = 1; r_Lu~y|
public final static int BUBBLE = 2; luW <V>
public final static int SELECTION = 3; h ZoC _\
public final static int SHELL = 4; (E!%v`_0
public final static int QUICK = 5; |/@0~O(6
public final static int IMPROVED_QUICK = 6; A)8rk_92Q
public final static int MERGE = 7; qE>i,|rP`
public final static int IMPROVED_MERGE = 8; {bN Y
public final static int HEAP = 9; 6 -]>]Hr-
za,6du6
public static void sort(int[] data) { fC_zX}3
sort(data, IMPROVED_QUICK); }%eDEM
} &oA~ Tx
private static String[] name={ k_]\(myq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5B%w]n
}; GGCqtA^@7d
F(deu^s%{
private static Sort[] impl=new Sort[]{ %fHH{60
new InsertSort(), 1|W2s\
new BubbleSort(), T`uDlo
new SelectionSort(), X$/E>I
new ShellSort(), j*XjY[
new QuickSort(), >f>V5L%1
new ImprovedQuickSort(), /x$}D=(CZ
new MergeSort(), g{e/X~
new ImprovedMergeSort(), 21U&Ww
new HeapSort() >yX/+p_
}; -:MmSeG7gO
$u:<x
public static String toString(int algorithm){ $nj\\,(g
return name[algorithm-1]; V]Sgx00;
} ze&#i6S
vruD U#
public static void sort(int[] data, int algorithm) { 5`"iq "5Cf
impl[algorithm-1].sort(data); Qe_+r(3)k
} 2zhn`m
^[#=L4
public static interface Sort { 4iwf\#
public void sort(int[] data); {o( * f
} )`^ /(YG
byafb+x
public static void swap(int[] data, int i, int j) { kL|\wci
int temp = data; rR\;G2p)
data = data[j]; Hj2<ZL
data[j] = temp; Hoj8okP
} vTdUuj3N
} sJOV2#r