[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; Acez'@z
} $*^7iT4q_t
int i1=l; G/)O@Ugp
int i2=mid+1; '$i: 2mn,
for(int cur=l;cur<=r;cur++){ ?1~`*LE
if(i1==mid+1) 03$mYS_?
data[cur]=temp[i2++]; R`NYEptJ
else if(i2>r) KLST\Ln:
data[cur]=temp[i1++]; ejSji-Qd
else if(temp[i1] data[cur]=temp[i1++]; ZF!h<h&,
else 9 P l
data[cur]=temp[i2++]; Kn5~d(:
} Wf+cDpK
} `KZm0d{H
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} n1Yp1"2b[
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改进后的归并排序: Ouk^O}W6
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package org.rut.util.algorithm.support; Kg{+T`
is?{MJZ_
import org.rut.util.algorithm.SortUtil; .YtKS
w'>pY
/** R$R*'l
* @author treeroot !z\h|wU+
* @since 2006-2-2 m+=] m_
* @version 1.0 8SMxw~9$
*/ {5Q!Y&N.%
public class ImprovedMergeSort implements SortUtil.Sort { owVX*&b{
sA+ }TNhq
private static final int THRESHOLD = 10; /:cd\A}
ju8>:y8
/* {i;r
* (non-Javadoc) M H|Og84
* #|uCgdi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tHU2/V:R
*/ U7?;UCmX
public void sort(int[] data) { cn3#R.G~
int[] temp=new int[data.length]; ^ gdaa>L
mergeSort(data,temp,0,data.length-1); j * %
} 'NWfBJm
/p/]t,-j2
private void mergeSort(int[] data, int[] temp, int l, int r) { |Tv#4st
int i, j, k; `aOFs+<)
int mid = (l + r) / 2; * `JYC
if (l == r) z0d.J1VW
return; 34f?6K1c
if ((mid - l) >= THRESHOLD) *IB4[6
mergeSort(data, temp, l, mid); pE`})/?\*
else D,k6$`
insertSort(data, l, mid - l + 1); f[]dfLS"W
if ((r - mid) > THRESHOLD) _qF+tm
mergeSort(data, temp, mid + 1, r); P9R9(quI
else dn&s*
insertSort(data, mid + 1, r - mid); {y)=eX9
CT&|QH{
for (i = l; i <= mid; i++) { 5tl< 3g`
temp = data; ` ./$&'
} =7?4eYHC
for (j = 1; j <= r - mid; j++) { l5~os>
temp[r - j + 1] = data[j + mid]; d9k0F OR1
} ]a>n:p]e
int a = temp[l]; kXViWOXU^
int b = temp[r]; EfqX y>W
for (i = l, j = r, k = l; k <= r; k++) { N"Z{5A
if (a < b) { &eJfGt5
data[k] = temp[i++]; pJ>P[
a = temp; &j;wCvE4+
} else { ez7A4>/
data[k] = temp[j--]; R8K&R\
b = temp[j]; %:i7s-0w
} <;lkUU(WT2
} &1Ok`_plO
} kBS9tKBWg
]>!K3kB
/** }H53~@WP>
* @param data Lw1Yvtn
* @param l !n`fTK<$
* @param i &<z1k-&!
*/ Usvl}{L[
private void insertSort(int[] data, int start, int len) { d z|or9&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -uS!\
} &bS,hbDt
} <NMEGit
} b1cy$I
} #`^}PuQ
)+#` CIv
堆排序： [+^1.N
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package org.rut.util.algorithm.support; "MeVE#O
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import org.rut.util.algorithm.SortUtil; hDDn,uzpd
dRYqr}!%n
/** Zpt\p7WQ
* @author treeroot 3<Lx&p~%T
* @since 2006-2-2 6XxvvMA97
* @version 1.0 y RqL9t
*/ 10Q ]67
public class HeapSort implements SortUtil.Sort{ !aUs>1i
#mxPw
/* (non-Javadoc) q])K,)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }{Pp]*I<A
*/ -OV&Md:~
public void sort(int[] data) { ROI7eU
MaxHeap h=new MaxHeap(); ijv(9mR
h.init(data); xo^b&ktQd
for(int i=0;i h.remove(); 2DA]i5
System.arraycopy(h.queue,1,data,0,data.length); 3Tcms/n
} Da*?x8sSL
J0WxR&%a)
private static class MaxHeap{ \ #F
+Ze}B*0
void init(int[] data){ )D O?VRI
this.queue=new int[data.length+1]; iI T;K@&
for(int i=0;i queue[++size]=data; iT+8|Yia
fixUp(size); #\{l"-
} E_rI?t^
} Fe*R
vO^m;['
private int size=0; )_90UwWpj
zpn9,,~u
private int[] queue; ,>a&"V^k
fgTg7 m
public int get() { qz_7%c]K[
return queue[1]; LBeF&sb6
} kt#fMd$
u[;\y|75
public void remove() { j^sg6.Z*
SortUtil.swap(queue,1,size--); (XTG8W sN
fixDown(1); k=$TGqQY?
} tAd%#:K
file://fixdown bW427B0
private void fixDown(int k) { Wu/]MBM
int j; BKCiIfkZ
while ((j = k << 1) <= size) { 5Pc;5 o0C
if (j < size %26amp;%26amp; queue[j] j++; au(D66VO
if (queue[k]>queue[j]) file://不用交换 r8?gD&c}
break; 8 /]S^'>
SortUtil.swap(queue,j,k); :LQYo'@yB
k = j; g/d<Zfq<{
} Vr)S{k-Q
} ^oz3F]4,g
private void fixUp(int k) { KAJi
while (k > 1) { 2QcOR4_V
int j = k >> 1; &J]K3w1p
if (queue[j]>queue[k]) bSlF=jT[S
break; \!X8
SortUtil.swap(queue,j,k); 9.M4o[
k = j; ) w5SUb
} H7Rx>h_
} ?=msH=N<l
/U*C\ xMm
} J1U/.`Oy
`g?Negt\v
} W+c<2?d:
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SortUtil： F{e@W([
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package org.rut.util.algorithm; u@)U"FZ
a5"D@E
import org.rut.util.algorithm.support.BubbleSort; C==hox7b
import org.rut.util.algorithm.support.HeapSort; ;4\2.*s
import org.rut.util.algorithm.support.ImprovedMergeSort; wU36sCo
import org.rut.util.algorithm.support.ImprovedQuickSort; BwEN~2u6
import org.rut.util.algorithm.support.InsertSort; _.Nbt(mz
import org.rut.util.algorithm.support.MergeSort; ,8uqdk-D
import org.rut.util.algorithm.support.QuickSort; s\(k<Ks
import org.rut.util.algorithm.support.SelectionSort; &|1<v<I5
import org.rut.util.algorithm.support.ShellSort; gs[uD5oo<
2jItq2.>
/** &t@jl\ND
* @author treeroot S3%FHS
* @since 2006-2-2 -);Wfs
* @version 1.0 \:'/'^=#|
*/ Rok7n1gW
public class SortUtil { r+i($jMs
public final static int INSERT = 1; I]t!xA~
public final static int BUBBLE = 2; {<p?2E
public final static int SELECTION = 3; | j`@eF/"
public final static int SHELL = 4; 8'[7 )I=
public final static int QUICK = 5; ~W'{p
public final static int IMPROVED_QUICK = 6; eK=xrk
public final static int MERGE = 7; YlQ=5u^+
public final static int IMPROVED_MERGE = 8; d"mkL-
public final static int HEAP = 9; =o(5_S.u;
9&2O9Nz6
public static void sort(int[] data) { IMFDM."s
sort(data, IMPROVED_QUICK); t|\%VC
} I*{nP)^9
private static String[] name={ dL 1tl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4[r0G+
}; uBKgcpvTs
5lmHotj#
private static Sort[] impl=new Sort[]{ kCF>nt@
new InsertSort(), dq6m>;`
new BubbleSort(), _/$Bpr{R
new SelectionSort(), 7>0o&
new ShellSort(), x /S}Q8!"}
new QuickSort(), sf qL|8
new ImprovedQuickSort(), \ a<h/4#|
new MergeSort(), k,6f &#x
new ImprovedMergeSort(), /4V#C-
new HeapSort() t#})Awy^R
}; .V/Rfq
::lKL
public static String toString(int algorithm){ wu!59pL
return name[algorithm-1]; a2O75 kWnm
} bHYy}weZ
X/!o\yyT
public static void sort(int[] data, int algorithm) { 6 7.+ .2
impl[algorithm-1].sort(data); wE>\7a*P%
} iL&fgF"'
6r0krbN
public static interface Sort { %D34/=(X
public void sort(int[] data); KeB"D!={;
} WRbj01v
HYZ5EV
public static void swap(int[] data, int i, int j) { ItVWO:x&v
int temp = data; %6,SKg p
data = data[j]; +F` S>U
data[j] = temp; -H@:*
} B\=8_z
} P>C~ i:4n