[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; Lg;b17
} [>P9_zID
int i1=l; KC"#
int i2=mid+1; %1Ex{H hb
for(int cur=l;cur<=r;cur++){ 7m4gGkX#r
if(i1==mid+1) 4yZ'+\ +I
data[cur]=temp[i2++]; E?VPCx
else if(i2>r) 0r4,27w
data[cur]=temp[i1++]; R04%;p:k#
else if(temp[i1] data[cur]=temp[i1++]; k!&G;6O-
else |igr3p5Fw
data[cur]=temp[i2++]; Z$UPLg3=;_
} bCV3h3<
} TO(2n8'fdO
ZsgJ6 Y
} ( M > C
'zRi;:UHA
改进后的归并排序: %i!=.7o.
?&ow:OH+
package org.rut.util.algorithm.support; G,{=sFX
OpNTyKbaD
import org.rut.util.algorithm.SortUtil; z;c~(o@4
7o+JQ&fF;
/** ;~A-32;Y4
* @author treeroot xJ-(]cO'
* @since 2006-2-2 0 |/:m
* @version 1.0 S!LLC{
*/ U{ZE|b.?b
public class ImprovedMergeSort implements SortUtil.Sort { r8R]0\
)td?t.4
private static final int THRESHOLD = 10; #NoY}*
$0kuR!U.N
/* qdM=}lbc
* (non-Javadoc) 5s5GBJ?
* 5l(8{,NDt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AQUl:0!
*/ "8.to=Lx
public void sort(int[] data) { wgN)*dpuI
int[] temp=new int[data.length]; P#8+GN+bF
mergeSort(data,temp,0,data.length-1); BzVF!<!
} 4R c_C0O
n+sV$*wvS
private void mergeSort(int[] data, int[] temp, int l, int r) { wqB 5KxO
int i, j, k; 3Y;<Q>roT
int mid = (l + r) / 2; 8\AyKw
if (l == r) i)@IV]]6yL
return; jX9{Ki"
if ((mid - l) >= THRESHOLD) g9T9TQ-O
mergeSort(data, temp, l, mid); C >@T+xOZ
else ak SUk)}e
insertSort(data, l, mid - l + 1); m'!smSx8
if ((r - mid) > THRESHOLD) *mvDh9v
mergeSort(data, temp, mid + 1, r); ;0Vyim)S]
else rXIFCt8J
insertSort(data, mid + 1, r - mid); k=nN#SMn
*y}<7R
for (i = l; i <= mid; i++) { $] gwaJ:
temp = data; p)x*uqSd
} @4O;dFOQ)
for (j = 1; j <= r - mid; j++) { ZaNZUVBh
temp[r - j + 1] = data[j + mid]; kVqRl%/3Tb
} ~x(1g;!^
int a = temp[l]; p aQ"[w
int b = temp[r]; b}f#[* Z
for (i = l, j = r, k = l; k <= r; k++) { #`g..3ey
if (a < b) { E$4_.Z8sRw
data[k] = temp[i++]; |vGb,&3
a = temp; (Yv)%2
} else { "X[sW%# F
data[k] = temp[j--]; /Ezx'h3Q
b = temp[j]; 2\b 2W_
} x;F^7c1
} B#A .-nb
} #"T< mM7
Ej[:!L
/** ORc20NFy7
* @param data Tc3~~X
* @param l nEG+TRZ)\
* @param i 0\y{/P?I$
*/ fQ[& ^S$
private void insertSort(int[] data, int start, int len) { [|vE*&:uO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y^iju(
} LH@xr\^
} Z$X[x7e.
} 'Nqa=_<WW
} E7CeE6U
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堆排序： (V06cb*42[
7\T~KYb?
package org.rut.util.algorithm.support; #A:+|{H"
}C'H@:/
import org.rut.util.algorithm.SortUtil; 5n1aRA1
Qf'%".*=~8
/** sOf;I]E|
* @author treeroot 1DTA Dh0
* @since 2006-2-2 t_+Xt$Q7C
* @version 1.0 w,s++bV;L
*/ +L]$M)*0&
public class HeapSort implements SortUtil.Sort{ TV['"'D&i
cu@i;Hb@
/* (non-Javadoc) 4/Mi-ls_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fOHgz,x=
*/ 2omKP,9,2
public void sort(int[] data) { AB:JXMyK
MaxHeap h=new MaxHeap(); MS=zG53y
h.init(data); iC.k8r+~
for(int i=0;i h.remove(); MjNq8'$"
System.arraycopy(h.queue,1,data,0,data.length); d%EUr9~?
} {,9^k'9
zK_+UT
private static class MaxHeap{ 82>90e(CH]
iPuX
void init(int[] data){ ]zt77'J
this.queue=new int[data.length+1]; K<g<xW*X
for(int i=0;i queue[++size]=data; Ofm?`SE*|
fixUp(size); IQm[,Fh
} Twi7g3}/jB
} r](%9Y
7<Yf
private int size=0; L3@upb
%77X/%.Y
private int[] queue; z2 m(<zb
l_MF9.z&
public int get() { Jfe<$-$$7
return queue[1]; Ed>Dhy6\r
} Nr(t5TP^
!#[=,'Y
public void remove() { `a+"[%
SortUtil.swap(queue,1,size--); yPmo@aw]1
fixDown(1); - Mubq
} 5j{jbo=!
file://fixdown }}Kjb
private void fixDown(int k) { P\nz;}nv
int j; h;lg^zlTb
while ((j = k << 1) <= size) { "{@Q..hxC
if (j < size %26amp;%26amp; queue[j] j++; ) u(Gf*t
if (queue[k]>queue[j]) file://不用交换 5L!cS+QNU
break; nl\l7/}6
SortUtil.swap(queue,j,k); je[1>\3W
k = j; e*Gt%'
} GI ;
} xis],.N
private void fixUp(int k) { AY B~{
while (k > 1) { iL6Yk @
int j = k >> 1; ,P.yl~'Al
if (queue[j]>queue[k]) $-Yq?:
break; q-lejVS(g
SortUtil.swap(queue,j,k); ?r}'0dW
k = j; YR? ujN
} bZKlQ<sI
} 6]D%|R,Q#}
h@H8oZ[
} iu$:_W_
|ler\"Eu
} !Y95e'f.x
@L/p
SortUtil： e%wzcn
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package org.rut.util.algorithm; ~ 7^#.
xaw)iC[gI{
import org.rut.util.algorithm.support.BubbleSort; !!we4tWq
import org.rut.util.algorithm.support.HeapSort; -H+<81"B#
import org.rut.util.algorithm.support.ImprovedMergeSort; dW4FMm>|
import org.rut.util.algorithm.support.ImprovedQuickSort; p "Cxe
import org.rut.util.algorithm.support.InsertSort; R?E< }\!
import org.rut.util.algorithm.support.MergeSort; 0LW|5BVbIO
import org.rut.util.algorithm.support.QuickSort; }QzF.![~z
import org.rut.util.algorithm.support.SelectionSort; Q/2(qD; u
import org.rut.util.algorithm.support.ShellSort; 5nA *'($j
"pa2,-&
/** \}p!S$`
* @author treeroot oWP3Y.
* @since 2006-2-2 ~B704i
* @version 1.0 j YVR"D;
*/ JsA.jqkB
public class SortUtil { cmu|d
public final static int INSERT = 1; p\).zuEf.
public final static int BUBBLE = 2; qH9bo-6
public final static int SELECTION = 3; E8LZ% N#
public final static int SHELL = 4; 6dlV:f_\y
public final static int QUICK = 5; Kwmtt
public final static int IMPROVED_QUICK = 6; F39H@%R
public final static int MERGE = 7; 921m'WE
public final static int IMPROVED_MERGE = 8; M}Obvl
public final static int HEAP = 9; )&F]j
KM:k<pvi
public static void sort(int[] data) { AS-%I+ A
sort(data, IMPROVED_QUICK); 62D UF
} j-%@A`j;
private static String[] name={ RO!em~{D*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S@^o=B]]
}; Wq"5-U;:w
YA:!ULzR*
private static Sort[] impl=new Sort[]{ OC5\3H
new InsertSort(), nb|KIW
new BubbleSort(), ,CED%
new SelectionSort(), p2I9t|
new ShellSort(), l RM7s(^l
new QuickSort(), Iss)7I
new ImprovedQuickSort(), ON-zhT?v
new MergeSort(), 41XS/# M$*
new ImprovedMergeSort(), :oeDksld
new HeapSort() ~C31=\$
}; |1/UC"f
;%`oS.69
public static String toString(int algorithm){ qdQQt5Y'm
return name[algorithm-1]; TO5#iiM)
} (`cXS5R
PO@b9O
public static void sort(int[] data, int algorithm) { J`d_=C?J
impl[algorithm-1].sort(data); *I<L1g%9d
} BTAt9Z8qK
3vC"Q!J&
public static interface Sort { 4 >`2vb
public void sort(int[] data); /73ANQ"
} {4^NZTjd@
, #nYHD
public static void swap(int[] data, int i, int j) { F~Sw-b kSf
int temp = data; #KgDOCQH
data = data[j]; EpUBO}q]
data[j] = temp; $)v`roDD.
} 'i;/?'!W6
} ggL^*MV