[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; -?n|kSHX
} eS9/-Y
int i1=l; rJK3;d?E
int i2=mid+1; %^}3:0G
for(int cur=l;cur<=r;cur++){ f,z_|e
if(i1==mid+1) i[)H!%RV*
data[cur]=temp[i2++]; h0`@yo
else if(i2>r) >_h*N H
data[cur]=temp[i1++]; a2fV0d6*l
else if(temp[i1] data[cur]=temp[i1++]; L}CjC>R!
else 3B95t-
data[cur]=temp[i2++]; :N5R.@9
} W@jBX{k
} .x7d!t:(D
|RX uO
} G^J|_!.a
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改进后的归并排序: W>036
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package org.rut.util.algorithm.support; "#^11o8
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import org.rut.util.algorithm.SortUtil; GQO}E@W6C
PO5/j
/** ve_TpP
* @author treeroot Kf D8S
* @since 2006-2-2 hkeOe
* @version 1.0 d(zBd=;
*/ JX@/rXFY}
public class ImprovedMergeSort implements SortUtil.Sort { FS30RP3 `/
%g}ri8
private static final int THRESHOLD = 10; fQq'_q5
DQY*0\
/* S1NM9xHJ
* (non-Javadoc) !T02@e/
* 4vcUHa|4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9/TF#
*/ ;muxIr`?
public void sort(int[] data) { m[,! orq
int[] temp=new int[data.length]; xpt*S~
mergeSort(data,temp,0,data.length-1); 8W Mhe=[
} $NzD&b$7
v)>R)bzqe
private void mergeSort(int[] data, int[] temp, int l, int r) { }-9
int i, j, k; smW 7zGE
int mid = (l + r) / 2; q-O=Em<*
if (l == r) .4pWyqU)!
return; s,O:l0
if ((mid - l) >= THRESHOLD) Q1? !,a
mergeSort(data, temp, l, mid); uFNVV;~RFI
else gtWJR
insertSort(data, l, mid - l + 1); 3G|n`dj
if ((r - mid) > THRESHOLD) pq$`T|6^
mergeSort(data, temp, mid + 1, r); vK z/-9im
else mnswGvY
insertSort(data, mid + 1, r - mid); chW 1UE
y`!~JL*
for (i = l; i <= mid; i++) { 8V@ /h6-e,
temp = data; {H{u[XR[z
} nE#p Ry]
for (j = 1; j <= r - mid; j++) { )*ocX)AE
temp[r - j + 1] = data[j + mid]; .^0@^%Wi
} Ew1> m'
int a = temp[l]; <m:8%]%M6
int b = temp[r]; ?bu-6pkx]
for (i = l, j = r, k = l; k <= r; k++) { d-w#\ ^
if (a < b) { VJ;4~WgBz
data[k] = temp[i++]; ^w'y>uFM
a = temp; f"j~{b7
} else { :r*skV|
data[k] = temp[j--]; oHH-joYnn
b = temp[j]; [=imF^=3Vb
} c.y8x
} ]wCg'EUB
} f]N2(eM
kKwb)i
/** zI77#AUM
* @param data 8TIc;'bRM
* @param l VuZd
* @param i (;-< @~2
*/ 2.6%?E]
private void insertSort(int[] data, int start, int len) { H$Om{r1j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gSS2)Sd}
} 'B0= "7
} 5>M6lwS
} ~ {OBRC
} WZ`u"t^2V
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堆排序： Kt5;GUV
QyN<o{\FD!
package org.rut.util.algorithm.support; <Uf?7
^"N]i`dIF
import org.rut.util.algorithm.SortUtil; kX!TOlk3
H.#<&5f
/** R@_i$Df|
* @author treeroot c+P.o.k;
* @since 2006-2-2 K1]m:Y<
* @version 1.0 Obwj=_+upd
*/ f/Cf2 K
public class HeapSort implements SortUtil.Sort{ Tov!X8p
S{_i1'
/* (non-Javadoc) V4kt&61
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AdV&w: ^yf
*/ H<bYm]a%
public void sort(int[] data) { Kv3cKNvu~
MaxHeap h=new MaxHeap(); @X\-c2=
h.init(data); SJ4[n.tPI
for(int i=0;i h.remove(); Q@zD'G>
System.arraycopy(h.queue,1,data,0,data.length); uM|*y-4
} L}r#KfIb
O3H dPQ
private static class MaxHeap{ ?QuD:vck
hJ[Z~PC\T0
void init(int[] data){ !Wn^B|
this.queue=new int[data.length+1]; G}ZJ}5h
for(int i=0;i queue[++size]=data; eiE36+'>b
fixUp(size); zi M~V'
} 0~2~^A#]\
} 08*bYJu
_?Q0yVH;,
private int size=0; {akSK
I29aja
private int[] queue; S[g{ )p)
imGg3'
public int get() { V?x&.C2Z
return queue[1]; V80BO#Pk
} H4l*
.dqV fa
public void remove() { yr=$a3web;
SortUtil.swap(queue,1,size--); K)!yOa'fH
fixDown(1); M@\A_x(Mas
} j?a^fcXB
file://fixdown op!8\rM<e
private void fixDown(int k) { Yn!)('FdT!
int j; Rs*]I\
while ((j = k << 1) <= size) { (.Q.S[<Y
if (j < size %26amp;%26amp; queue[j] j++; w<}kY|A"=-
if (queue[k]>queue[j]) file://不用交换 <OF2\#Nh
break; OEMYS I%
SortUtil.swap(queue,j,k); 5cY([4,
k = j; n."vCP}O+
} iKs @oHW
} KY}c}*0
private void fixUp(int k) { @K{1O|V
while (k > 1) { %#5yC|o9Pn
int j = k >> 1; (t$jb|Oa
if (queue[j]>queue[k]) SvE3E$*
break; !$}:4}56F
SortUtil.swap(queue,j,k); <UI^~Azc#
k = j; |]s/NNU
} 9eG{"0)
} s.VtmAH
#m %ZW3
} of?hP1kl[
K9\p=H^T7
} }.+{M.[}
wrtJ8O(
SortUtil： -B+Pl*
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package org.rut.util.algorithm; SxyXz8+e[
W@"s~I6
import org.rut.util.algorithm.support.BubbleSort; OFcLh
import org.rut.util.algorithm.support.HeapSort; ^ud-N;]MKs
import org.rut.util.algorithm.support.ImprovedMergeSort; LmCr[9/
import org.rut.util.algorithm.support.ImprovedQuickSort; =EE>QM
import org.rut.util.algorithm.support.InsertSort; R<* c
import org.rut.util.algorithm.support.MergeSort; k9]M=eO
import org.rut.util.algorithm.support.QuickSort; H]i.\2z
import org.rut.util.algorithm.support.SelectionSort; bA/,{R
import org.rut.util.algorithm.support.ShellSort; /=o~7y
&`]Lg?J
/** DjzHEqiH
* @author treeroot a| w.G "W
* @since 2006-2-2 W8bh49
* @version 1.0 Vr%>'XN>"
*/ hDPZj#(c
public class SortUtil { >"Tivc5
public final static int INSERT = 1; -L zx3"
public final static int BUBBLE = 2; S}mZU!
public final static int SELECTION = 3; h!@t8R
public final static int SHELL = 4; GPyr;FV!s
public final static int QUICK = 5; K'/,VALp
public final static int IMPROVED_QUICK = 6; S_ELZO#7
public final static int MERGE = 7; c)L1@qdZ
public final static int IMPROVED_MERGE = 8; NOzAk%s3I
public final static int HEAP = 9; fLGZ@-qA0
45?aV@
public static void sort(int[] data) { 'r/+za:2
sort(data, IMPROVED_QUICK); 2=?:(e9
} fv;3cxQp
private static String[] name={ |<:Owd=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U"SH fI:
}; ,}8|[)"
F},#%_4
private static Sort[] impl=new Sort[]{ Hj\iI p
new InsertSort(), .N:& {$o:
new BubbleSort(), ~OdE!!
new SelectionSort(), bQTkW<7gh
new ShellSort(), nu=yE$BN{
new QuickSort(), Njp?/r
new ImprovedQuickSort(), O1C|{ M
new MergeSort(), *#{V^}
new ImprovedMergeSort(), 9n\b!*x
new HeapSort() u;@~P
}; uD'GI
+1uAzm4SL
public static String toString(int algorithm){ 7dg2-4
return name[algorithm-1]; [unK5l4_!
} ^0x0 rY
%$'YP
public static void sort(int[] data, int algorithm) { {Yt@H
impl[algorithm-1].sort(data); \w6A-daD0
} Z30r|Ufh
_klT
public static interface Sort { e-@.+f2CC
public void sort(int[] data); @.D1_A
} f3[/zcm;
-g5o+RT@
public static void swap(int[] data, int i, int j) { xE{PsN1 X;
int temp = data; >14x.c
data = data[j]; }{oZdO
data[j] = temp; 2:8p>^g=
} CyHaFUbZ
} _NwB7@ e