[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; @54$IhhT~
} )5n0P Zi
int i1=l; ZnJJ-zP
int i2=mid+1; (&NLLrsio
for(int cur=l;cur<=r;cur++){ h^_^)P+;
if(i1==mid+1) 34X]b[^
data[cur]=temp[i2++]; G~DHNO6
else if(i2>r) ovOV&Zt
data[cur]=temp[i1++]; %,1TAmJfHa
else if(temp[i1] data[cur]=temp[i1++]; s-5#P,Lw
else lAA&#-#YG
data[cur]=temp[i2++]; 7XT(n v
} IJKdVb~
} (^W :f{
;hODzfNkS
} G /$+e
ygV_"=+|N
改进后的归并排序: pGD-K41O]
v(R^LqE
package org.rut.util.algorithm.support; f+ZOE?"
}5n\us
import org.rut.util.algorithm.SortUtil; ^V1\boo=
j:uq85s
/** Gh.?6kuh
* @author treeroot ,aD~7QX1:
* @since 2006-2-2 J zFR9DEt
* @version 1.0 *~4<CP+"0
*/ o/ 51RH
public class ImprovedMergeSort implements SortUtil.Sort { 88<d<)7t
yPT o,,ca=
private static final int THRESHOLD = 10; 5D=U.UdR
{`k&Q +gY
/* k"%JyO8Y
* (non-Javadoc) ^t71${w##
* ~3Pp}eO~V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KztQT9kY
*/ 8@+<W%+th
public void sort(int[] data) { 9015PEO
int[] temp=new int[data.length]; !-n*]C
mergeSort(data,temp,0,data.length-1); %-fS:~$
} x4>"m(&%
|OAiHSW"V
private void mergeSort(int[] data, int[] temp, int l, int r) { !gV{[j?~zr
int i, j, k; )Ghw!m
int mid = (l + r) / 2; qhG2j;
if (l == r) ooB9iNo^
return; op2Zf?Bx{+
if ((mid - l) >= THRESHOLD) DF-PBVfpu
mergeSort(data, temp, l, mid); tUZfQ
else 6< -Cpc
insertSort(data, l, mid - l + 1); k,'MmAz
if ((r - mid) > THRESHOLD) ~ArRD-_t
mergeSort(data, temp, mid + 1, r); W5Jy"]^I
else _<2{8>EVf
insertSort(data, mid + 1, r - mid); v5e*R8/
|;(P+Q4lB
for (i = l; i <= mid; i++) { hT_Q_1,
temp = data; uit.r^8l
} Wi5Dl=
for (j = 1; j <= r - mid; j++) { 8 l= EL7
temp[r - j + 1] = data[j + mid]; 3G 5xIr6
} -G?IXgG
int a = temp[l]; m+7%]$
int b = temp[r]; .X(qs1
for (i = l, j = r, k = l; k <= r; k++) { &}C-W* f,Z
if (a < b) { ]oz>/\!
data[k] = temp[i++]; `-cw[@uD
a = temp; k#~oagW_Gw
} else { Uc,..
data[k] = temp[j--]; ZQir?1=
b = temp[j]; P*}aeu&lnD
} @qW$un:
} }M"])B I
} 2h]CZD4
@}waZ?'
/** 9C Ki$L
* @param data n"}*C|(k
* @param l .q:6F*,1M
* @param i /zQx}U)TP
*/ Qi=0[
private void insertSort(int[] data, int start, int len) { _*{Lha
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ./.aLTh
} (Uu5$q(
} 7B5b +
} kD1Nq~h2
} c3c3T`B
cH:&S=>h
堆排序： p/7'r
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package org.rut.util.algorithm.support; [ybK
UmMu|`
import org.rut.util.algorithm.SortUtil; `)KGajB
p15dbr1
/** Rg46V-"d,@
* @author treeroot :f_oN3F p
* @since 2006-2-2 B`3z(a92S
* @version 1.0 jA~omX2A
*/ VQ2'a/s
public class HeapSort implements SortUtil.Sort{ z?kE((Ey
W >}T$a}\
/* (non-Javadoc) _/.VXW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (Nd)$Oq[4
*/ saQo]6#
public void sort(int[] data) { QGGBI Ku
MaxHeap h=new MaxHeap(); eAjR(\f>
h.init(data); 3A~<|<}t
for(int i=0;i h.remove(); 0(Z:QqpU$
System.arraycopy(h.queue,1,data,0,data.length); OR'e!{
} jeA2yjAC
RF -c`C
private static class MaxHeap{ 2VX9FDrnk
2\|sXC
void init(int[] data){ 2S[:mnK
this.queue=new int[data.length+1]; Eg2jexl
for(int i=0;i queue[++size]=data; [(TmAEON
fixUp(size); #(a;w
} u%1JdEWZd
} yiH;fK+x
83#<Yxk~
private int size=0; Z?9G2<i
R6z *!W{
private int[] queue; ft0d5n!ui4
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public int get() { ZdPqU\G^q
return queue[1]; hM="9]i.
} @ IDY7x27
pV 8U`T
public void remove() { #KHj.Vg
SortUtil.swap(queue,1,size--); _pvt,pW
fixDown(1); 9j-;-`$S
} =0;njL(7;
file://fixdown sE{5&aCSR
private void fixDown(int k) { ~rXLb:
int j; 0Am\02R.C,
while ((j = k << 1) <= size) { Y(T$k9%}+
if (j < size %26amp;%26amp; queue[j] j++; rF{,]U9`
if (queue[k]>queue[j]) file://不用交换 auY?Cj'"fs
break; ]1h9:PF
SortUtil.swap(queue,j,k); Y q|OX<i`K
k = j; Hxc>?
} `m"K_\w=/
} wk^$DM/KJ)
private void fixUp(int k) { \]S)PDqR
while (k > 1) { BPOT!-
int j = k >> 1; W!=ur,F+
if (queue[j]>queue[k]) UQ)^`Zj
break; am| 81)|a
SortUtil.swap(queue,j,k); 8QI+O`
k = j; dV*9bDkM/
} ]a*26AbU+
} 20Jlf?
L$,Kdpj
} cmd7-2
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} *8u<?~9F
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SortUtil： ~~p)_
J~ *>pp#U
package org.rut.util.algorithm; E=,fdyj.
8`I,KkWg
import org.rut.util.algorithm.support.BubbleSort; =dWqB&
import org.rut.util.algorithm.support.HeapSort; fX1Ib$v
import org.rut.util.algorithm.support.ImprovedMergeSort; _tQM<~Y]u\
import org.rut.util.algorithm.support.ImprovedQuickSort; o?#-Tkb
import org.rut.util.algorithm.support.InsertSort; {9Q**U`w
import org.rut.util.algorithm.support.MergeSort; yVpru8+eD
import org.rut.util.algorithm.support.QuickSort; ]\ZmK0q<:
import org.rut.util.algorithm.support.SelectionSort; ~eiD(04^r*
import org.rut.util.algorithm.support.ShellSort; 4O{,oN~7
$L]M3$\9
/** mK^E@uxN
* @author treeroot p<FqK/
* @since 2006-2-2 ezm*9Jc~p
* @version 1.0 ^7*zi_Q
*/ ,~Lx7 5{
public class SortUtil { 52'6wwv6?
public final static int INSERT = 1; 7WNUHLEt
public final static int BUBBLE = 2; _0iV6Bj
public final static int SELECTION = 3; =66'33l2
public final static int SHELL = 4; }/L#<n`Z
public final static int QUICK = 5; -V'Y^Df
public final static int IMPROVED_QUICK = 6; q1rD>n&d
public final static int MERGE = 7; lxR]Bh+
public final static int IMPROVED_MERGE = 8; [mG!-.ll
public final static int HEAP = 9; F$YT4414
@ykl:K%ke
public static void sort(int[] data) { 1T4#+kW&
sort(data, IMPROVED_QUICK); 7H,)heA
} h5v=h>c
private static String[] name={ q5) K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \23m*3"W
}; e=[@HVr
ahN8IV=+Gm
private static Sort[] impl=new Sort[]{ (L W2S;-
new InsertSort(), F&7^M0x\ O
new BubbleSort(), /3;]e3x
new SelectionSort(), wF*9%K'E
new ShellSort(), zXIdup@
new QuickSort(), fBBtS S
new ImprovedQuickSort(), bUuQ"!>ppu
new MergeSort(), jq_ i&~S
new ImprovedMergeSort(), P9jSLM
new HeapSort() K[Vj+qdyl
}; 59X XmVg
}>b@=5O
public static String toString(int algorithm){ G4\|bwh
return name[algorithm-1]; y&wo"';
} d@ ]N
c^z)[
public static void sort(int[] data, int algorithm) { @=BApuer+
impl[algorithm-1].sort(data); qXoq< |
} _Ec"[xW
x-b}S1@
public static interface Sort { G(bl)p^
public void sort(int[] data); uF[~YJ>
} 0y2zjXM;3
6A ptq
public static void swap(int[] data, int i, int j) { ~G.MaSm
int temp = data; ^,`]Q)P^
data = data[j]; 9!ARr@ ;
data[j] = temp; zd{sw}
} 6;(b-Dhi
} =o'g5Be<F