[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; _;zIH5 H
} yj<j>JtN
int i1=l; mFk6a{+YX
int i2=mid+1; n]nb+_-97
for(int cur=l;cur<=r;cur++){ Z'Uc}M'U
if(i1==mid+1) Fu%D2%V$/
data[cur]=temp[i2++]; i!yu%>:M
else if(i2>r) }Bk>'
data[cur]=temp[i1++]; @#u'z~a)
else if(temp[i1] data[cur]=temp[i1++]; {7F?30: ]
else 6'Sq|@VOi
data[cur]=temp[i2++]; []L yu
} +cXdF
} 1uwzo9Yg
!3*:6
} }c]u'a!4
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改进后的归并排序: vx7wW<e%D
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package org.rut.util.algorithm.support; dj}y6V&
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import org.rut.util.algorithm.SortUtil; PI-o)U$Ehv
6}/m~m
/** :qAF}|6
* @author treeroot f.e4 C,
* @since 2006-2-2 sjW;Nsp
* @version 1.0 sUe<21:
*/ o[Gp*o\
public class ImprovedMergeSort implements SortUtil.Sort { +M s`C)f
_~}n(?>
private static final int THRESHOLD = 10; }f;cA
&sA@!
/* Y^(NzN
* (non-Javadoc) )O:T\{7+
* #cCR\$-~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <jz\U7TBf
*/ Yn>y1~
public void sort(int[] data) { b0:5i<"w6
int[] temp=new int[data.length]; 1RU+d.&D
mergeSort(data,temp,0,data.length-1); znq/ %7
} i_'u:P<t
K0 6 E:
private void mergeSort(int[] data, int[] temp, int l, int r) { UmNh0nS
int i, j, k; g[D`.
int mid = (l + r) / 2; }"\jB
if (l == r) u^X,ASkQ
return; a? <Ar#)j
if ((mid - l) >= THRESHOLD) eb*w$|y6"
mergeSort(data, temp, l, mid); n38l!m(.
else 6Gj69Lr
insertSort(data, l, mid - l + 1); 0s2@z5bfX
if ((r - mid) > THRESHOLD) R=m9[TgBm
mergeSort(data, temp, mid + 1, r); &60#y4
else .>^iU}
insertSort(data, mid + 1, r - mid); cERmCe|/CG
tj<0q<is
for (i = l; i <= mid; i++) { p+.{"%
temp = data; 6>e YG<y{
} \!J9|
for (j = 1; j <= r - mid; j++) { F#>^S9Gml
temp[r - j + 1] = data[j + mid]; 6v(;dolBIw
} >sZ207*
int a = temp[l]; .NX>d@ Kc
int b = temp[r]; ,0fYB*jk
for (i = l, j = r, k = l; k <= r; k++) { EG oe<.
if (a < b) { 6i=Nk"d
data[k] = temp[i++]; /OsTZ"*.2/
a = temp; 1k39KO@
} else { ]/TqPOi:
data[k] = temp[j--]; ,]cb3nP
b = temp[j]; |$QL>{81
} 1 GB
} Z#_+yw
} hcJny
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/** M].D27
* @param data ?]Z EK8c
* @param l bA*T1Db,t>
* @param i O ]Stf7]%;
*/ O~u@J'4
private void insertSort(int[] data, int start, int len) { 'boAv%1_sa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nv-_\M
} RxrUnMF
} c ;@k\6
} YA'_Ba(v)
} jb {5
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堆排序： n<3*7/-
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package org.rut.util.algorithm.support; 1z5\>F
Yv7`5b{N.
import org.rut.util.algorithm.SortUtil; 3^%sz!jK+
h8-'I=~
/** -_xC,dwK
* @author treeroot {WYmO1
* @since 2006-2-2 c:f++||
* @version 1.0 =F>nqklc
*/ GTBT0$9g.
public class HeapSort implements SortUtil.Sort{ _>)=c<HL
vo3[)BDbT
/* (non-Javadoc) -7\6j#;l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;DN:AgXP
*/ OK1f Y`$z
public void sort(int[] data) { /&Vgo~.J
MaxHeap h=new MaxHeap(); a"|\n_
h.init(data); u*C"d1v=
for(int i=0;i h.remove(); C~([aH@-I
System.arraycopy(h.queue,1,data,0,data.length); VjhwafYC
} *d/,Y-tl
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private static class MaxHeap{ /@~&zx&_
u9~RD
void init(int[] data){ j6.'7f5M<H
this.queue=new int[data.length+1]; .jps6{
for(int i=0;i queue[++size]=data; YkqauyV^
fixUp(size); x|oa"l^JZ"
} 2`]_c=
} Qx%]u8s
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private int size=0; %G>|u/:U
k3FpD=N
private int[] queue; x[i Et%_
gbc])`aJ>
public int get() { 4 fxD$%9
return queue[1]; ?=lnYDj
} ;N/=)m
!s:v UY58
public void remove() { H%:u9DlEK/
SortUtil.swap(queue,1,size--); <(<19t5.
fixDown(1); B%e#u.'6
} %M_5C4&6
file://fixdown B,dHhwO*l
private void fixDown(int k) { +iL,8eW
int j; p<9e5`&I
while ((j = k << 1) <= size) { FII>6c
if (j < size %26amp;%26amp; queue[j] j++; R.+yVO2
if (queue[k]>queue[j]) file://不用交换 {<_9QAS
break; iTq~^9G
SortUtil.swap(queue,j,k); hm5A@Z
k = j; )xMP
} 8;r7ksE~
} Q, !b
private void fixUp(int k) { >5|;8v-r
while (k > 1) { x# &ZGFr~
int j = k >> 1; rH<iUiA?O
if (queue[j]>queue[k]) ;<yVJox
break; .$,.w__m~
SortUtil.swap(queue,j,k); m#oZu {
k = j; I;!zZ.\
} }M I9?\"q
} 6$JRV
`xO&!DN
} ]&D;'),
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} yfD)|lK
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SortUtil： N>A*N,+
#(`@D7S"
package org.rut.util.algorithm; h""a#n)q}`
@e/40l|X
import org.rut.util.algorithm.support.BubbleSort; t/baze;V
import org.rut.util.algorithm.support.HeapSort; m )2t<
import org.rut.util.algorithm.support.ImprovedMergeSort; &Z^,-Y
import org.rut.util.algorithm.support.ImprovedQuickSort; {=NHidi~
import org.rut.util.algorithm.support.InsertSort; ,6%{9oW9Z:
import org.rut.util.algorithm.support.MergeSort; gl4|D
import org.rut.util.algorithm.support.QuickSort; Q3vWwP;t~
import org.rut.util.algorithm.support.SelectionSort; %joIe w]V3
import org.rut.util.algorithm.support.ShellSort; Yjr6/&ML
`[+nz rLkO
/** AjQ^ {P
* @author treeroot M zLx2?
* @since 2006-2-2 7 vS]O$w<4
* @version 1.0 ?=]*r>a3
*/ Q(}TN,N
public class SortUtil { R":nG7o
public final static int INSERT = 1; p5KM(N6f
public final static int BUBBLE = 2; f]BG`rJX
public final static int SELECTION = 3; E&/D%}Wl
public final static int SHELL = 4; (zFUC]
public final static int QUICK = 5; V+()`>44
public final static int IMPROVED_QUICK = 6; oj7X9~ nd
public final static int MERGE = 7; _`JYA
public final static int IMPROVED_MERGE = 8; <h/\)bPB
public final static int HEAP = 9; m_TZY_;
jaAv_=93f
public static void sort(int[] data) { U/B1/96lJ
sort(data, IMPROVED_QUICK); d`|W6Do
} %KeQp W
private static String[] name={ G~{xTpL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X^#.4:>.
}; o%Lk6QA$
Z:#-4CiP
private static Sort[] impl=new Sort[]{ H>-?/H
new InsertSort(), C/Ig.KmXF{
new BubbleSort(), ({cgak
new SelectionSort(), "mAVkq~
new ShellSort(), N>OF tP
new QuickSort(), ,uD>.->
new ImprovedQuickSort(), 2&W(@wT$
new MergeSort(), -ANp88a
new ImprovedMergeSort(), yiUJ!m
new HeapSort() cz/mUU
}; v UAYYe
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public static String toString(int algorithm){ U4_<
return name[algorithm-1]; *|x2"?d-F:
} -#b-@sD
-;z&">
public static void sort(int[] data, int algorithm) { Q^v8n1
impl[algorithm-1].sort(data); ,>%AEN6N2
} 3:a}<^DuCS
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public static interface Sort { B{W2D
public void sort(int[] data); oOuhbFu
} HnVUG4yZTD
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public static void swap(int[] data, int i, int j) { n%Xw6qV:
int temp = data; =VlO53Hy{
data = data[j]; /|y3M/;F
data[j] = temp; }[PbA4l.g
} |,]#vcJP#b
} gU/\'~HG