[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; 2nSK}q
} eH%i8a
int i1=l; y_T%xWK5
int i2=mid+1; BfQ#5
for(int cur=l;cur<=r;cur++){ 0,6!6>BOT
if(i1==mid+1) B.#-@
data[cur]=temp[i2++]; >bg{
else if(i2>r) hfs QAa
data[cur]=temp[i1++]; .GvZv>
else if(temp[i1] data[cur]=temp[i1++]; {T3wOi
else 3(1UIu
data[cur]=temp[i2++]; 4hW:c0
} y.a)M?3
} W2A!BaH%
LWV^'B_X-
} 'r}y{`3M
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改进后的归并排序: Jjh=zxR>
VgMuX3=
package org.rut.util.algorithm.support; >n%ckL|rG
Kp6%=JjO
import org.rut.util.algorithm.SortUtil; iGNZC{
1:4u]$@E
/** h#uk-7
* @author treeroot Cm-dos
* @since 2006-2-2 |2I/r$Q
* @version 1.0 MF+F8h>/
*/ *\^(-p~M
public class ImprovedMergeSort implements SortUtil.Sort { pK)!o
|j4;XaG)
private static final int THRESHOLD = 10; _+ >V(,{G
_FN#Vq2
/* MgHO WoF
* (non-Javadoc) ;p:CrFv
* \$,8aRT>#U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,?!MVN-
*/ %%lJyLq'Vk
public void sort(int[] data) { EH]qYF.
int[] temp=new int[data.length]; TZarI-A
mergeSort(data,temp,0,data.length-1); }jYVB|2
} isz-MP$:K5
@y,>cDg
private void mergeSort(int[] data, int[] temp, int l, int r) { !)FKF7'
int i, j, k; 'Kd-A:K2g
int mid = (l + r) / 2; u`u{\ xN9
if (l == r) ^h"@OEga?
return; c`7dNx
if ((mid - l) >= THRESHOLD) PsN_c[+
mergeSort(data, temp, l, mid); nsu RG
else JC7:0A^
insertSort(data, l, mid - l + 1); H)5"<=]
if ((r - mid) > THRESHOLD) #X0Y8:vj
mergeSort(data, temp, mid + 1, r); 1c4:'0
else %5j*e
insertSort(data, mid + 1, r - mid); 2QKt.a
z!)@`?
for (i = l; i <= mid; i++) { c>wne\(5H
temp = data; v R! y#
} 4C9k0]k2
for (j = 1; j <= r - mid; j++) { 6e"Lod_ L
temp[r - j + 1] = data[j + mid]; ,m5tO
} Bm&6
int a = temp[l]; ;t4YI7E*
int b = temp[r]; `?SLp
for (i = l, j = r, k = l; k <= r; k++) { ]vH:@%3U
if (a < b) { &,$N|$yK}|
data[k] = temp[i++]; ra^"Vr
a = temp; )&ucX
} else { H_w?+Rig
data[k] = temp[j--]; ZN!<!"~
b = temp[j]; {}BAQ9|q
} 3lN@1jlh
} </_.+c [
} 0Q[;{}W}
}`]Et99Q5
/** lDZ~
* @param data Sp[]vm8N
* @param l Cw~fP[5XMF
* @param i t_\&LMD
*/ H"wIa8A
private void insertSort(int[] data, int start, int len) { Rp6q)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =|H.r9-PK6
} }w{E<C(M
} x}#N?d
} 2g;Id.i>
} i>(TPj|
/b410NP5
堆排序： 4j<[3~:0 o
1eI_F8I U
package org.rut.util.algorithm.support; N: 5 N}am
j k&\{
import org.rut.util.algorithm.SortUtil; @I?:x4
j)#GoU=w
/** 0KjCM4t
* @author treeroot }U|Vpgd!
* @since 2006-2-2 C4gzg
* @version 1.0 ~Jlq.S'
*/ Nf}i/
public class HeapSort implements SortUtil.Sort{ SA?1*dw)
=tl~@~pqI
/* (non-Javadoc) Pxgul7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _!9I f
*/ Op hD_^
public void sort(int[] data) { -:Bgp*S
MaxHeap h=new MaxHeap(); 9rT"_d#
h.init(data); A|yU'k
for(int i=0;i h.remove(); \!IEZ
System.arraycopy(h.queue,1,data,0,data.length); P[jh^!<j
} lz_ r
IaO*{1re
private static class MaxHeap{ 6Y9<| .
{8,_[?H
void init(int[] data){ R0-Y2v
this.queue=new int[data.length+1]; GZm=>!T
for(int i=0;i queue[++size]=data; DH:9iX'
fixUp(size); Ti>}To}B5
} +R"n_6N
} IH.EvierJ
fr&p0)85>B
private int size=0; j_S3<wEJ
*E-MJCv
private int[] queue; =FfR?6 ~
W3n[qVZIC
public int get() { ( geV(zT
return queue[1]; N]&hw&R{Q
} ruy?#rk
nPH\Lra
public void remove() { $9Gra#
SortUtil.swap(queue,1,size--); <eZrb6a'
fixDown(1); )M@^Z(W/a
} F1p|^hYDW
file://fixdown ^!x qOp!
private void fixDown(int k) { n%!50E6*:
int j; %1)JRc
while ((j = k << 1) <= size) { zbfe=J4c
if (j < size %26amp;%26amp; queue[j] j++; m3XT8F*&
if (queue[k]>queue[j]) file://不用交换 j?VHR$
break; V(Oi!(H;v
SortUtil.swap(queue,j,k); S(0JBGC
k = j; 7mL1$i6=
} He&A>bA)z
} V>ZDJW"G!
private void fixUp(int k) { u@Bgyt7Y
while (k > 1) { ](`:<>c
int j = k >> 1; AG"iS<u
if (queue[j]>queue[k]) pqe%tRH{
break; L5CnPnF
SortUtil.swap(queue,j,k); BL%3[JQ
k = j; kRH D{6mol
} bnV)f<
} TJuS)AZ C
/mwDVP<z /
} S5~(3I )v
a~zh5==QD
} ){w!<Lb
"WH &BhQYD
SortUtil： ]NKz5[9D
EW/NH&{
package org.rut.util.algorithm; 'lmjZ{k
l!ZzJ&
import org.rut.util.algorithm.support.BubbleSort; muO;g&
import org.rut.util.algorithm.support.HeapSort; A@reIt
import org.rut.util.algorithm.support.ImprovedMergeSort; ?28)l 4 Ml
import org.rut.util.algorithm.support.ImprovedQuickSort; In*0.
import org.rut.util.algorithm.support.InsertSort; {fMo#`9=
import org.rut.util.algorithm.support.MergeSort; Z1wfy\9c8
import org.rut.util.algorithm.support.QuickSort; :)Da^V
import org.rut.util.algorithm.support.SelectionSort; Me^L%%:@
import org.rut.util.algorithm.support.ShellSort; =q[ynZ8O\w
1"T&B0G3l
/** B0^:nYko
* @author treeroot rK4 pYo
* @since 2006-2-2 ?S.LGc
* @version 1.0 ~xc0Ky?8
*/ ~!_UDD
public class SortUtil { -#g0
public final static int INSERT = 1; Ef=4yH?\j
public final static int BUBBLE = 2; >Fc=F#tA9
public final static int SELECTION = 3; {7Kl#b
public final static int SHELL = 4; 8qT^=K $
public final static int QUICK = 5; <g, 21(bc
public final static int IMPROVED_QUICK = 6; 51'V[tI;8
public final static int MERGE = 7; LtNspFoLb
public final static int IMPROVED_MERGE = 8; EpENhC0
public final static int HEAP = 9; vb`:
/}s#
public static void sort(int[] data) { $[b1_Db
sort(data, IMPROVED_QUICK); dCzS f4:
} D?"Q)kVuD
private static String[] name={ V_KHVul
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X$ A ]7t
}; K:Z|# i-
lNvxt6@s
private static Sort[] impl=new Sort[]{ B*fBb.Z
new InsertSort(), wL&[Vi_j{
new BubbleSort(), O\w-hk
new SelectionSort(), 4n%|h-!8
new ShellSort(), KCn#*[
new QuickSort(), 6lwWFR+k
new ImprovedQuickSort(), VGOdJ|2]Wr
new MergeSort(), %gTY7LIe1z
new ImprovedMergeSort(), ##U/Wa3
new HeapSort() `U{#;
}; w^S]HzMd
yRz l}
public static String toString(int algorithm){ I2?g'tz
return name[algorithm-1]; DhG{hQ[[
} :oJ!9\5
UQjZhH
public static void sort(int[] data, int algorithm) { RI]x=
impl[algorithm-1].sort(data); $EZr@n
} h5[.G!
^_o:Ddz?l"
public static interface Sort { = Ruq
public void sort(int[] data); !1P<A1K
} dz?Ey~;M
Ev&aD
public static void swap(int[] data, int i, int j) { ^1XnnQa
int temp = data; ~bfjP2 g
data = data[j]; l{. XhB
data[j] = temp; 5NMju!/
} Vje LPbk)
} &lW~ot1,