[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; ^Qa!{9o[
} xHi.N*~D
int i1=l; m}o4Vr;"
int i2=mid+1; ;]sbz4?
for(int cur=l;cur<=r;cur++){ &u~#bDh
if(i1==mid+1) clO9l=g
data[cur]=temp[i2++]; h!q_''*;
else if(i2>r) $ {5|{`
data[cur]=temp[i1++]; !ui:0_
else if(temp[i1] data[cur]=temp[i1++]; <5:`tC2
else Z<@dM2b)
data[cur]=temp[i2++]; /{*0 \`;
} Eao^/MKx-
} [7@9wa1v!
bz\-%$^k
} )lDmYt7me
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改进后的归并排序: Ee 15Y$1
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package org.rut.util.algorithm.support; CKr5L
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import org.rut.util.algorithm.SortUtil; x{#W84
k{-#2Qz
/** QeNN*@ ='i
* @author treeroot k*uLjU
* @since 2006-2-2 6Dz N.fz
* @version 1.0 )HJ#|JpxC
*/ u5E\wRn
public class ImprovedMergeSort implements SortUtil.Sort { t @vb3
P&}J(;Lbl
private static final int THRESHOLD = 10; mB<*we
?$Jj^/luD
/* RA$q{$arb
* (non-Javadoc) VFLW@
* \ICc?8oL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y;xY74Nq
*/ 8\B]!
public void sort(int[] data) { Gx/kel[Y}
int[] temp=new int[data.length]; @z1pE@7jK
mergeSort(data,temp,0,data.length-1); kYnp$8
} '4]_~?&x
r0(*]K:.
private void mergeSort(int[] data, int[] temp, int l, int r) { uwo\FI
int i, j, k; d_aHUmI^"
int mid = (l + r) / 2; $s"{C"4q
if (l == r) } za"rU
return; c=#V*<
if ((mid - l) >= THRESHOLD) :oO ?A
mergeSort(data, temp, l, mid); "1|\V.>>;
else %E*Q0/
insertSort(data, l, mid - l + 1); o#9Q
if ((r - mid) > THRESHOLD) }(/\vTn*1
mergeSort(data, temp, mid + 1, r); g=L80$1
else (,OF<<OH
insertSort(data, mid + 1, r - mid); 3+oGR5gIN
pRH'>}rtuH
for (i = l; i <= mid; i++) { "'v^X!"
temp = data; T3,}CK#O
} L. DD
for (j = 1; j <= r - mid; j++) { +\)a p
temp[r - j + 1] = data[j + mid]; 3:"w"0[K3
} ~Y3X*
int a = temp[l]; i.Z iLDs\7
int b = temp[r]; 20?@t.aMp
for (i = l, j = r, k = l; k <= r; k++) { pi;'!d[l%
if (a < b) { =:;K nS
data[k] = temp[i++]; 0I['UL^!F
a = temp; br%l>Y\"
} else { %:e.ES
data[k] = temp[j--]; nN5fP<H2x
b = temp[j]; o9]i {e>L
} 2wwJ>iR`
} O 8XHaVLg3
} *~0U4kw+
7Xf52\7n
/** Kn,td:(
* @param data 9>9,
* @param l yV?qX\~*
* @param i OWT|F0.1$k
*/ w9TE E,t;5
private void insertSort(int[] data, int start, int len) { =:BTv[lv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N~~ sM"n
} hMnm>
} ;b_l/T(
} ?Sr7c|a2
} 0)rayzv
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堆排序： $Ts;o
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package org.rut.util.algorithm.support; ],s{%a5wC
sf"vii,1A
import org.rut.util.algorithm.SortUtil; t-Uo
#\Zr$?t|V
/** eI,H
* @author treeroot 2{<o1x,Ym
* @since 2006-2-2 \![ p-mW{
* @version 1.0 *-(8Z>9
*/ 6{!Cx9V
public class HeapSort implements SortUtil.Sort{ DM,)nh6'
kgh0
/* (non-Javadoc) s;cGf+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nrg$V>pD
*/ 2p~}<B
public void sort(int[] data) { OJiwI)a9
MaxHeap h=new MaxHeap(); :!ablO~
h.init(data); WG*),P?
for(int i=0;i h.remove(); A DVUx}
System.arraycopy(h.queue,1,data,0,data.length); ZI.Czzx\=
} +Jh1D_+!9
h@PE:=
private static class MaxHeap{ Ot`znJU@
Q^bYx (r5w
void init(int[] data){ J`[gE`d
this.queue=new int[data.length+1]; 83J63Xa
for(int i=0;i queue[++size]=data; 28qlp>U
fixUp(size); {krBAz&
} %,(X R`
} @FZbp
^.9DfA0
private int size=0; ?j&ZzK'#^
|A\o
private int[] queue; C5g9Gg
! (Q[[M
public int get() { $0k7W?tu
return queue[1]; lffw "
} u\;d^A
b]
public void remove() { sI.p( -KQ
SortUtil.swap(queue,1,size--); 0O[le*3b
fixDown(1); d$"?8r4:K
} ,^RZ1tLz
file://fixdown n?U^vK_
private void fixDown(int k) { U(Tl$#Bt
int j; n?;h-KKO:
while ((j = k << 1) <= size) { 7>=
if (j < size %26amp;%26amp; queue[j] j++; 0SQrz$y
if (queue[k]>queue[j]) file://不用交换 pHXs+Ysw+
break; P\WFm
SortUtil.swap(queue,j,k); <HtGp6q
k = j; yf7|/M
} Mh{244|o[
} _PcF/Gyk
private void fixUp(int k) { HX)]@qL
while (k > 1) { IXG@$O?y/
int j = k >> 1; N0%q66]1
if (queue[j]>queue[k]) 4/%Y@Z5
break; nRvaCAt^
SortUtil.swap(queue,j,k); yj=OR|v
k = j; \d*ts(/a*
} \~g,;>%7Y
} 'iTY?
c8Q}m(bhWI
} A{e>7Z72
w3z'ZCcr;"
} ':3[?d1Es
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SortUtil： `5e{ec c7
3-&~jm~"
package org.rut.util.algorithm; p8 Ao{
g)R2V
import org.rut.util.algorithm.support.BubbleSort; TW|- 0
import org.rut.util.algorithm.support.HeapSort; vZW[y5
import org.rut.util.algorithm.support.ImprovedMergeSort; BeN]D
import org.rut.util.algorithm.support.ImprovedQuickSort; I\x9xJ4x
import org.rut.util.algorithm.support.InsertSort; 684d&\(s
import org.rut.util.algorithm.support.MergeSort; >JAWcT)d
import org.rut.util.algorithm.support.QuickSort; vw4b@v-XQ3
import org.rut.util.algorithm.support.SelectionSort; 8N+T=c
import org.rut.util.algorithm.support.ShellSort; >cLh$;l
no W]E}nN
/** |}.}q
* @author treeroot zvVo-{6
* @since 2006-2-2 t0GJ$])
* @version 1.0 6ypLE@Mk
*/ .rITzwgB
public class SortUtil { 1=7ASS9
public final static int INSERT = 1; UhrRB
public final static int BUBBLE = 2; m"'}{3$%
public final static int SELECTION = 3; \A,zwdt P
public final static int SHELL = 4; 8\^A;5
public final static int QUICK = 5; 9K#3JyW*
public final static int IMPROVED_QUICK = 6; oR,6esA+6n
public final static int MERGE = 7; ' ,S}X\
public final static int IMPROVED_MERGE = 8; ]<C]`W2{
public final static int HEAP = 9; c#>(8#'.U
vS)>g4
public static void sort(int[] data) { 1;H"4u_IG&
sort(data, IMPROVED_QUICK); 46pR!k
} 7~F~'V
private static String[] name={ xQ7U$QF|]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0#DEh|?
}; nJGs,~"
X9NP,6
private static Sort[] impl=new Sort[]{ e0h[(3bXs$
new InsertSort(), +'-.c"
new BubbleSort(), @"MQ6u G>
new SelectionSort(), [8^q3o7n
new ShellSort(), hl7 z1h
new QuickSort(), $XTtDUP@
new ImprovedQuickSort(), jz![#-G
new MergeSort(), WubV?NX;EF
new ImprovedMergeSort(), yW(|auq
new HeapSort() S<-nlBs.
}; 3F@P$4!#l
Eh ";irE
public static String toString(int algorithm){ '5 ~cd
return name[algorithm-1]; \Dy|}LE
} D[#V
:)D7_[i
public static void sort(int[] data, int algorithm) { DJ@n$G`^^
impl[algorithm-1].sort(data); q[C?1Kc.z
} 5QLK
as!a!1
public static interface Sort { ($kw*H{Ah^
public void sort(int[] data); \0d'y#Gp*
} ,aLwOmO
q:TNf\/o
public static void swap(int[] data, int i, int j) { pm,xGo2
int temp = data; 8\!E )M|4
data = data[j]; BjsT 9?6W/
data[j] = temp; qSB&Q0T
} J (?qk
} XWnP(C9?