[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; y& 1@d+Lf
} ?1a9k@[t
int i1=l; ne/JC(
int i2=mid+1; F_jHi0A
for(int cur=l;cur<=r;cur++){ %0N HU`j
if(i1==mid+1) W ';X4e
data[cur]=temp[i2++]; 6CIzT.
else if(i2>r) -p.\fvip
data[cur]=temp[i1++]; ZcQu9XDIt
else if(temp[i1] data[cur]=temp[i1++]; va'F '|
else e)g&q'O
data[cur]=temp[i2++]; n=vDEX:'
} }$4z$&
} >[,eK=
v|o{AL:ei
} ~~Ezt*lH
yi>AogQ,
改进后的归并排序: . yg#
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package org.rut.util.algorithm.support; Xa?O)Bq.
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import org.rut.util.algorithm.SortUtil; m(6d3P
a[(OeVQ5
/** qul#)HI
* @author treeroot dkZe.pv$j
* @since 2006-2-2 >m,hna]RZ
* @version 1.0 |uqI}6h.
*/ 9ziFjP+1
public class ImprovedMergeSort implements SortUtil.Sort { <78|~SKAV
_wS=*-fT
private static final int THRESHOLD = 10; (^m] 7l
0f.jW O
/* #e|o"R;/`
* (non-Javadoc) 2 HEU
* dD=$$( je
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a3tcLd|7J
*/ 89g a+#7
public void sort(int[] data) { JfIXv
int[] temp=new int[data.length]; MK=oGzK
mergeSort(data,temp,0,data.length-1); 0lg$zi x(
} H.@$#D
~\jP+[>M'
private void mergeSort(int[] data, int[] temp, int l, int r) { VP~2F E
int i, j, k; d?2ORr|m=
int mid = (l + r) / 2; Cp6S2v I
if (l == r) T8x)i\<
return; Og/aTR<;=
if ((mid - l) >= THRESHOLD) $`E?=L`$
mergeSort(data, temp, l, mid); % /VCjuV
else &uK(. @
insertSort(data, l, mid - l + 1); 6*q1%rs:w
if ((r - mid) > THRESHOLD) ^{4BcM7eH
mergeSort(data, temp, mid + 1, r); =cS&>MT
else jtP*C_Scv/
insertSort(data, mid + 1, r - mid); :ZV|8xI
ERpAV-Zf
for (i = l; i <= mid; i++) { 3ic /xy;}
temp = data; [-])$~WfW
} h*k V@Dc
for (j = 1; j <= r - mid; j++) { oS fr5 i
temp[r - j + 1] = data[j + mid]; c\{N:S>
} ` kT\V'
int a = temp[l]; *c$[U{Px
int b = temp[r]; EfrQ~`\
for (i = l, j = r, k = l; k <= r; k++) { olE(#}7V
if (a < b) { u ]e-IYH
data[k] = temp[i++]; &Q883A J
a = temp; i/x |c!E
} else { Jr2yn{s=S
data[k] = temp[j--]; ^v'kEsE^*
b = temp[j]; CUu Owx6%
} 4XjwU`
} wtTy(j,9
} .h-mFcjy
d m8t~38
/** iBSM \ n
* @param data im2mA8OH
* @param l #'_#t/u
* @param i G% tlV&In
*/ $[>{s9E
private void insertSort(int[] data, int start, int len) { &<VU}c^!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gwoe1:F:J
} *#T: _
} ShI1f
} .~f )4'T 9
} R^l0Bu]X
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堆排序： MJXnAIG?2
6]brL.eGj
package org.rut.util.algorithm.support; MXaFqK<Y
)QE6X67i
import org.rut.util.algorithm.SortUtil; r&]XNq'P9
wk|+[Rl;L
/** GY%9V5GB
* @author treeroot 7g\v (P
* @since 2006-2-2 o$*(N
* @version 1.0 <fvu) f
*/ Nw*<e ]uD
public class HeapSort implements SortUtil.Sort{ W"c\/]aD
1<r!9x9G
/* (non-Javadoc) oy^-?+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $hhXsu=
*/ 0cS$S Mn{
public void sort(int[] data) { U>2KjZB
MaxHeap h=new MaxHeap(); 9 C[~*,qx
h.init(data); Nk7y2[
for(int i=0;i h.remove(); I%5vI}
System.arraycopy(h.queue,1,data,0,data.length); t*IePz]/
} u cpU$+
?^Rp" H
private static class MaxHeap{ Hr?lRaV
t1w5U+z
void init(int[] data){ `MI\/oM@
this.queue=new int[data.length+1]; FRQ.ix2
for(int i=0;i queue[++size]=data; J@5iD
fixUp(size); L7rgkxI7k*
} !85bpQ.
} //63|;EEkl
wN[lC|1c
private int size=0; 4Zbn8GpC
hxoajexU
private int[] queue; w+)${|N?
^~~Rto)Y
public int get() { KuJ)alD;1
return queue[1]; *tqD:hiF
} |T<aWZb^=
cGlN*GJ*H
public void remove() { ;M~,S^U
SortUtil.swap(queue,1,size--); XDPR$u8hM
fixDown(1); n41#
} KhR3$|fH<
file://fixdown Lz 1.+:Ag
private void fixDown(int k) { +=($mcw#[
int j; "'v+*H 3
while ((j = k << 1) <= size) { s<YN*~
if (j < size %26amp;%26amp; queue[j] j++; Lf9hOMHx
if (queue[k]>queue[j]) file://不用交换 kLgkUck8]
break; T?1BcY
SortUtil.swap(queue,j,k); c(Dp`f,
k = j; n#X~"|U`
} wkp2A18n
} fI`Ez!w0
private void fixUp(int k) { IWv(GQx
while (k > 1) { g{N}]_%Uh
int j = k >> 1; kY]"3a
if (queue[j]>queue[k]) /b,>fK^
break; m*y&z'e\
SortUtil.swap(queue,j,k); S`s]zdUTP
k = j; [Mu9"kF
} :rb;*nY!
} }g+kU1y
mF 1f(
} {!2K-7;
rUKg<]&@
} Biv)s@"f-Q
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SortUtil： T1Py6Q,-
9Q9{>d#"
package org.rut.util.algorithm; ("a@V8M`$F
T_*inPf
import org.rut.util.algorithm.support.BubbleSort; N@|<3R!N*e
import org.rut.util.algorithm.support.HeapSort; [<XYU,{R
import org.rut.util.algorithm.support.ImprovedMergeSort; 6{)pF
import org.rut.util.algorithm.support.ImprovedQuickSort; _^_3>}y5op
import org.rut.util.algorithm.support.InsertSort; og";mC
import org.rut.util.algorithm.support.MergeSort; xT>9ZZcE
import org.rut.util.algorithm.support.QuickSort; V|YQhd0kv
import org.rut.util.algorithm.support.SelectionSort; 89M'klZ
import org.rut.util.algorithm.support.ShellSort; Q/|.=:~FO
m1W) PUy
/** %,[,mW4l
* @author treeroot i]MemM-
* @since 2006-2-2 9^/Y7Wp/@
* @version 1.0 `KZV@t
*/ N:lE{IvRJ
public class SortUtil { ,V1"Typ#<
public final static int INSERT = 1; _<AkM"
public final static int BUBBLE = 2; ]gBnzh.
public final static int SELECTION = 3; Ek<Qz5)
public final static int SHELL = 4; v]SxZLa
public final static int QUICK = 5; )WoH>D
public final static int IMPROVED_QUICK = 6; Z#.d7B"
public final static int MERGE = 7; !;>s.]
public final static int IMPROVED_MERGE = 8; 1 *' /B
public final static int HEAP = 9; g|Lbe4?
}-fHS;/
public static void sort(int[] data) { BWxfY^,'&6
sort(data, IMPROVED_QUICK); O7 ;=g!j
} l73% y
private static String[] name={ H~yHSm 3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?pZ"7kkD
}; _#V&rY&@
gnH{_
private static Sort[] impl=new Sort[]{ VzXVy)d
new InsertSort(), 4FzTf7h^
new BubbleSort(), 9D14/9*(dU
new SelectionSort(), ~Eg]Auk7
new ShellSort(), E_~e/y"-
new QuickSort(), CT'4.
new ImprovedQuickSort(), g(pr.Dw6
new MergeSort(), (#y2RF8j
new ImprovedMergeSort(), g7! LX[
new HeapSort() C<_\{de|9
}; vD8pVR+
%%K3J<5
public static String toString(int algorithm){ }Nr6oUn
return name[algorithm-1]; XncX2E4E
} Z}t;:yhR
MiZ<v/L2
public static void sort(int[] data, int algorithm) { ow'G&<0b
impl[algorithm-1].sort(data); #HV5M1mb
} H5 z1_O_+
S*<Jy(:n
public static interface Sort { ou-#+Sdd
public void sort(int[] data); +(=-95qZ
} ZP~H!
ZV--d'YiEm
public static void swap(int[] data, int i, int j) { sgOau\E
int temp = data; E#_/#J]UQn
data = data[j]; no8\Oees
data[j] = temp; "_&ZRcd*
} Y$>NsgQn6
} /Pextj<