[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; QUL^]6$
} @OOnO+g
int i1=l; 7n*,L5%?]4
int i2=mid+1; =[8EQdR
for(int cur=l;cur<=r;cur++){ `Tt}:9/3
if(i1==mid+1) VeO$n*O
data[cur]=temp[i2++]; iOpMU
else if(i2>r) jEj#|w
data[cur]=temp[i1++]; )X{x\ /N
else if(temp[i1] data[cur]=temp[i1++]; %u\Oj \8U
else T9r"vw
data[cur]=temp[i2++]; :[:5^R
} 6e,|HV
} y9d[-j ;w
mA|&K8H
} y:Xs/RS
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改进后的归并排序: 5urM,1SQ@
]]lgCac_U9
package org.rut.util.algorithm.support; (4_7ICFI
)3<|<jwcx
import org.rut.util.algorithm.SortUtil; !'>(r K$
4`lt 4L
/** &V7@ TZ
* @author treeroot }} cz95
* @since 2006-2-2 E~?0Yrm F
* @version 1.0 f}q4~NPn-
*/ ,]?Xf>
public class ImprovedMergeSort implements SortUtil.Sort { =[%ge{,t
:USN`"
private static final int THRESHOLD = 10; *Dr-{\9
3V:{_~~
/* 44bTx y
* (non-Javadoc) j.Ro(0%
* %VG;vW\V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [r'PGx
*/ Y1a[HF^-
public void sort(int[] data) { ,bT|:T@ny
int[] temp=new int[data.length]; Az4+([
mergeSort(data,temp,0,data.length-1); nU]n]gd
} 9{{QdN8
0yW#).D^b
private void mergeSort(int[] data, int[] temp, int l, int r) { O]{3aMs!Y
int i, j, k; cW B>
int mid = (l + r) / 2; $0WO 4C%M
if (l == r) dz fR ^Gv
return; TWF6YAQm
if ((mid - l) >= THRESHOLD) RAMkTS
mergeSort(data, temp, l, mid); x)eYqH~i
else @y%4BU&>0
insertSort(data, l, mid - l + 1); K_/8MLJQ
if ((r - mid) > THRESHOLD) $qkVu
mergeSort(data, temp, mid + 1, r); s%h|>l[lKT
else 0r?975@A
insertSort(data, mid + 1, r - mid); Oo'IeXQ9(
Y<('G5A
for (i = l; i <= mid; i++) { 6<sd6SM
temp = data; PW(4-H
} 1iWo*+5
for (j = 1; j <= r - mid; j++) { f%n],tE6
temp[r - j + 1] = data[j + mid]; o>rsk 6lNi
} :3`6P:^
int a = temp[l]; C/Vs+aW n
int b = temp[r]; +`pS 7d
for (i = l, j = r, k = l; k <= r; k++) { OiI[w8
if (a < b) { #<ppiu$
data[k] = temp[i++]; r|$@Wsb?#
a = temp; ~(E.$y7P
} else { m~;fklX S
data[k] = temp[j--]; tL0<xGI5^
b = temp[j]; z3!j>X_w
} UObI&*2
} `"CIy_m
} ^):m^w.
$hexJzX
/** kO:|?}Koc
* @param data d-e6hI4b
* @param l b-pZrnZ!
* @param i '6l4MR$j&m
*/ ^z&eD,
private void insertSort(int[] data, int start, int len) { $4K(AEt[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~WH4D+
} 8:9m< ^4S(
} 2xBIfmR^y
} 2=Sv#
} V~j:!=b%v
f,QoA
堆排序： "`P/j+-rt
`#O%ZZ+
package org.rut.util.algorithm.support; j#^EZ/
O$QtZE61
import org.rut.util.algorithm.SortUtil; U5X\RXy~
*1FDK{
/** j`JY3RDD
* @author treeroot W;~ f865
* @since 2006-2-2 (S1c6~
* @version 1.0 on?<3eED
*/ v&t~0jX,
public class HeapSort implements SortUtil.Sort{ YyOPgF] M
h`O"]2
/* (non-Javadoc) Z05kn{<a8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <9zzjgzG{c
*/ *&$J.KM
public void sort(int[] data) { DONXq]f:,"
MaxHeap h=new MaxHeap(); ~)!yl. H
h.init(data); ~)5NX 4Po
for(int i=0;i h.remove(); 8<BYAHY^
System.arraycopy(h.queue,1,data,0,data.length); #-76E
} vW`Dy8`06
USF9sF0l
private static class MaxHeap{ 3r{3HaN(^'
RmF,x9
void init(int[] data){ \G}02h
this.queue=new int[data.length+1]; 0#\K9|.
for(int i=0;i queue[++size]=data; i?+ZrAx>
fixUp(size); ?:@13wm
} Y0nnn
} pq8XCOllXx
;U7o)A;
private int size=0; VaYL#\;c<
Swugt"`nN
private int[] queue; r6 k/QZT
m]C|8b7Y
public int get() { OIi8x? .~]
return queue[1]; bv %Bo4s
} yVF1*#"
[bE-Uu7q5P
public void remove() { Y j[M>v
SortUtil.swap(queue,1,size--); _~q!<-Z
fixDown(1); .3xpDVW^e
} &BF97%E2
file://fixdown M::
private void fixDown(int k) { kV>[$6
int j; X`-7: !+
while ((j = k << 1) <= size) { MNC=r?
if (j < size %26amp;%26amp; queue[j] j++; QaAA@l
if (queue[k]>queue[j]) file://不用交换 UZcsMMKH
break; w'Y(doY,
SortUtil.swap(queue,j,k); OS$}ej\
k = j; 6I)[6R
} PE!/n6
} b2L9%8h
private void fixUp(int k) { @#HB6B
while (k > 1) { 9jwcO)p^
int j = k >> 1; uD'yzR!]+
if (queue[j]>queue[k]) .bdp=vbA
break; irjOGn
SortUtil.swap(queue,j,k); Z;=h=
k = j; !H)$_d \uj
} |nOqy&B
} ;Dh\2! sr
z@bq*':~J
} ++9?LH4S4
;_$Q~X
} m1pge4*
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SortUtil： Iax-~{B3AY
'=s{9lxn^
package org.rut.util.algorithm; ^)J2tpr;]=
=*0KH##%$
import org.rut.util.algorithm.support.BubbleSort; I{bDa'rX
import org.rut.util.algorithm.support.HeapSort; h#hx(5"6
import org.rut.util.algorithm.support.ImprovedMergeSort; T]er_n
import org.rut.util.algorithm.support.ImprovedQuickSort; 0H$6_YX4A
import org.rut.util.algorithm.support.InsertSort; ON(OYXj
import org.rut.util.algorithm.support.MergeSort; -FOn%7r#Y
import org.rut.util.algorithm.support.QuickSort; RB\ Hl
import org.rut.util.algorithm.support.SelectionSort; K#"J8h;x
import org.rut.util.algorithm.support.ShellSort; uez"{_I
b]0]*<~y
/** LDDgg u
* @author treeroot >m$jJlAv8
* @since 2006-2-2 /Dd.C<F
* @version 1.0 $ol]G`+
*/ _+sb~
public class SortUtil { %wFz4:
public final static int INSERT = 1; /"+CH\) E
public final static int BUBBLE = 2; 8ln{!,j;
public final static int SELECTION = 3; N F$k~r
public final static int SHELL = 4; QJ i5H
public final static int QUICK = 5; 0Cg}yyOz
public final static int IMPROVED_QUICK = 6; h 8%(,$*
public final static int MERGE = 7; &9+]{jXF
public final static int IMPROVED_MERGE = 8; "*U0xnI
public final static int HEAP = 9; hqXp>.W
&nV/XLpG
public static void sort(int[] data) { lQS(\}N
sort(data, IMPROVED_QUICK); ^cUmLzM
} =l)D$l
private static String[] name={ *&vlfH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @:dn\{Zsea
}; k!Ym<RD%N
c;X%Ar
private static Sort[] impl=new Sort[]{ E,kDy:
new InsertSort(), Y9/`w@"v
new BubbleSort(), |D% O`[k+
new SelectionSort(), $#z-b@s=B
new ShellSort(), bmOK8
new QuickSort(), \DiAfx<Ub
new ImprovedQuickSort(), _2-fH
new MergeSort(), 4Wd H!z
new ImprovedMergeSort(), ]/9@^D}&
new HeapSort() x/pX?k
}; B_uhNLd
Aaw]=8 OI
public static String toString(int algorithm){ q"48U.}T
return name[algorithm-1]; l`bl^~xRo
} 5gq
k/Z]zZC
public static void sort(int[] data, int algorithm) { 4-CGe
impl[algorithm-1].sort(data); sck.2-f"
} LULRi#n
(+CNs
public static interface Sort { .9u0WP95
public void sort(int[] data); 2M+}o"g
} Bq5-L}z
/n2qW.qJ>
public static void swap(int[] data, int i, int j) { ,Y&7` m
int temp = data; l\/uXP?
data = data[j]; s/l>P~3=
data[j] = temp; 1gA^Qv~?
} sv.?C pE
} 7;I;(iY