[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; 'j3'n0o
} P~qVr#eU
int i1=l; yY| .
int i2=mid+1; 3QHZC0AY
for(int cur=l;cur<=r;cur++){ &V:dcJ^Q
if(i1==mid+1) ]czy8n$+
data[cur]=temp[i2++]; /*O,T
else if(i2>r) ;&!dD6N
data[cur]=temp[i1++]; #] GM#.
else if(temp[i1] data[cur]=temp[i1++]; UKJY.W!w4
else rODKM-7+
data[cur]=temp[i2++]; \fKE~61
} Ur-^X(nL
} ZkIQ-;wx
5->PDp
} OX`n`+^D
jF;4 8g@^
改进后的归并排序: OWjZ)f/
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package org.rut.util.algorithm.support; h^0mjdSp,
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import org.rut.util.algorithm.SortUtil; $~YuS_sYg
tQ~B!j]
/** 0\#Q;Z2
* @author treeroot % *G)*n
* @since 2006-2-2 lewDR"0Kx
* @version 1.0 ( 7?%Hg
*/ fA8+SaXW%
public class ImprovedMergeSort implements SortUtil.Sort { Fq9[:
3-R3Qlr
private static final int THRESHOLD = 10; 0hkuBQb\
yn#h$o<
/* A%PPG+IfA
* (non-Javadoc) l17ZNDzLU
* 'JMa2/7CG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $aA.d^
*/ K(d!0S
public void sort(int[] data) { *[5
int[] temp=new int[data.length]; tAA7
mergeSort(data,temp,0,data.length-1); 5q ,
} ]2(c$R
4PWr;&
private void mergeSort(int[] data, int[] temp, int l, int r) { -"zu"H~t4
int i, j, k; 8[C6LG
int mid = (l + r) / 2; 6b/b}vl
if (l == r) ':V_V. :
return; ]1&9~TL
if ((mid - l) >= THRESHOLD) ~{+{pcO}
mergeSort(data, temp, l, mid); I5L7BTe
else #I?iR3u
insertSort(data, l, mid - l + 1); n{t',r50
if ((r - mid) > THRESHOLD) >>$|,Q-.
mergeSort(data, temp, mid + 1, r); [tzSr=,Cg
else jEsTw_
insertSort(data, mid + 1, r - mid); MQ*#oVqv
DH !Br
for (i = l; i <= mid; i++) { S |x)7NC
temp = data; 0'hxw3#
} OkZ!ZS h
for (j = 1; j <= r - mid; j++) { psC7IE<v
temp[r - j + 1] = data[j + mid]; I{zE73
} yU|ji?)e
int a = temp[l]; q&E5[/VK:
int b = temp[r]; fqb$_>3Ol
for (i = l, j = r, k = l; k <= r; k++) { C.E>)
if (a < b) { A7C+&I!L
data[k] = temp[i++]; Fw9``{4w
a = temp; nEm7&Gb
} else { :*@|"4
data[k] = temp[j--]; [bv@qBL
b = temp[j]; 9@Sb! 9h
} %20-^&zZ
} n6G&^Oj
} v$G*TR<2
;n!X% S<z*
/** F?} *ovy
* @param data udGGDH
* @param l f hG2
* @param i }qv-lO
*/ XyphQ}\u
private void insertSort(int[] data, int start, int len) { C[nr>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ? SP7vQ/
} 9Nu#&_2R
} |V\.[F2Fe
} *'YNRM\}
} o'7ju~0L
#L.}CzAz
堆排序： !2|`aa
kA<r:/
package org.rut.util.algorithm.support; ?ev G=S4>
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import org.rut.util.algorithm.SortUtil; )m8>w6"
rp#*uV9;
/** X&s\_jQ
* @author treeroot R0mT/h2
* @since 2006-2-2 &H1D!N
* @version 1.0 H}V*<mgw
*/ $Q?G*@y
public class HeapSort implements SortUtil.Sort{ .eNwC.8i
s66XdM
/* (non-Javadoc) ~cBc&u:"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z034wn\N
*/ jL+}F/~r
public void sort(int[] data) { 'uACoME@
MaxHeap h=new MaxHeap(); hav?mnVJ
h.init(data); N#['fg'
for(int i=0;i h.remove(); +N$7=oGC
System.arraycopy(h.queue,1,data,0,data.length); /v)!m&6]>
} l;}7A,u
xO<-<sRA
private static class MaxHeap{ qj"syO
V1nZ M
void init(int[] data){ $t# ,'M
this.queue=new int[data.length+1]; XjZao<?u
for(int i=0;i queue[++size]=data; BMWeD
fixUp(size); B"8JFf}"q
} 11<@++,i
} L+rySP
P9i9<pR
private int size=0; fyq]M_5
H.8CwsfP
private int[] queue; 9=~H6(m>
Gx_`|I{P
public int get() { x";.gjI |g
return queue[1]; R^M (fC
} \1`DaQp7
n+\Cw`'<H
public void remove() { 1X"H6j[w
SortUtil.swap(queue,1,size--); ^$+f3Z'
fixDown(1); |@L &yg,x
} ~q?"w:@;x
file://fixdown G'?f!fz;
private void fixDown(int k) { 7cmr *y
int j; ]7S7CVDk4
while ((j = k << 1) <= size) { , HI%Xn
if (j < size %26amp;%26amp; queue[j] j++; ym*#ZE`B!
if (queue[k]>queue[j]) file://不用交换 Y0X94k.u
break; W[X!P)=w]
SortUtil.swap(queue,j,k); 5?{ >9j5
k = j; 5@>4)dk\
} *o e0=
} w4fJ`,
private void fixUp(int k) { &PBWJ?@O)r
while (k > 1) { D*T$ v
int j = k >> 1; wdcryejCkr
if (queue[j]>queue[k]) h/0-Mrk;e
break; OZB}aow
SortUtil.swap(queue,j,k); .A"T086
k = j; K~y9zF{
} TaQ "G
} \LoSUl i
w HHF=Q
} QV'3O|
a[P>SqT4`
} _2gT1B
jU4)zN/`r
SortUtil： G9'YgW+$7
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package org.rut.util.algorithm; ksOANLRN
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import org.rut.util.algorithm.support.BubbleSort; fv j5[Q
import org.rut.util.algorithm.support.HeapSort; dy6F+V\DG
import org.rut.util.algorithm.support.ImprovedMergeSort; U8QR*"GmT
import org.rut.util.algorithm.support.ImprovedQuickSort; M,_^hm7
import org.rut.util.algorithm.support.InsertSort; -4y)qGb*?
import org.rut.util.algorithm.support.MergeSort; Qk~0a?#y5
import org.rut.util.algorithm.support.QuickSort; h*\TCl)
import org.rut.util.algorithm.support.SelectionSort; ^=izqh5S
import org.rut.util.algorithm.support.ShellSort; 3<)@ll
$E`iqRB
/** Y6f+__O
* @author treeroot 7<QYT+6xV
* @since 2006-2-2 HzG~I8o(d
* @version 1.0 qD$GKN.
*/ Z\*5:a]
public class SortUtil { LN~N Fjs
public final static int INSERT = 1; ??\*D9rCn
public final static int BUBBLE = 2; iUxDEt[t*
public final static int SELECTION = 3; fD\^M{5f
public final static int SHELL = 4; ^aD/ .
public final static int QUICK = 5; N}}PlGp$
public final static int IMPROVED_QUICK = 6; *3F /Ft5
public final static int MERGE = 7; [!:-m61
public final static int IMPROVED_MERGE = 8; jsqUMy-
public final static int HEAP = 9; :rTKqX&"j
NDe[2
public static void sort(int[] data) { @ yg|OA}
sort(data, IMPROVED_QUICK); Z}LOy^TL
} @\6nXf
private static String[] name={ %7C%`)T]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nv_m!JG7
}; STXqq[+Rf
vh. Wm?qQ
private static Sort[] impl=new Sort[]{ *,pZ fc
new InsertSort(), `b^#quz
new BubbleSort(), oA!5dpNhU
new SelectionSort(), \~z?PA.$
new ShellSort(), wv7p,9Z[
new QuickSort(), *@ <8&M9x
new ImprovedQuickSort(), V`R)#G>IH%
new MergeSort(), <@U.
new ImprovedMergeSort(), Pghva*&
new HeapSort() MAwC\7n+X
}; 9*-pden l
M\\e e3Ih
public static String toString(int algorithm){ "UhK]i*@l
return name[algorithm-1]; Z0()pT
} Wk\mgGn+
`Ct'/h{
public static void sort(int[] data, int algorithm) { ;<bj{#mMv
impl[algorithm-1].sort(data); "o^bN 9=
} .-('C> @
k7yv>iN
public static interface Sort { }sTH.%
public void sort(int[] data); (E"&UC[
} u@=+#q~/P
Q*09E
public static void swap(int[] data, int i, int j) { ;1*m}uNz
int temp = data; =9;[C:p0-
data = data[j]; XI@6a9Uk
data[j] = temp; `x%U
} PS_3Oq)
} gtaV6sD