[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; sh6F-g
} 9P3jx)K
int i1=l; .3B3Z&vr
int i2=mid+1; ?Q`Sx
for(int cur=l;cur<=r;cur++){ 4)BPrWea1
if(i1==mid+1) Y]5\%JR
data[cur]=temp[i2++]; zKi5e+\
else if(i2>r) ;9{x""
data[cur]=temp[i1++]; Kzs]+Cl
else if(temp[i1] data[cur]=temp[i1++]; x=>+.'K
else ">n38:?R
data[cur]=temp[i2++]; [U]ouh)
} &?@gUk74"
} [\M=w7
wXc"Car)
} Y=oj0(Q*
j;tT SNF
改进后的归并排序: P}%0YJ$6
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package org.rut.util.algorithm.support; Sd3KY9,
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import org.rut.util.algorithm.SortUtil; ZwLD7j*)
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/** Ufz& 2
* @author treeroot )U`"3R
* @since 2006-2-2 pr|P#mc"J
* @version 1.0 S^GB\uJ
*/ 0x}8}
public class ImprovedMergeSort implements SortUtil.Sort { !9!kb
-}lcMZY
private static final int THRESHOLD = 10; /`3^?zlu"
)p-B@5bb
/* r@xMb,!H
* (non-Javadoc) ob
* v5|X=B>&>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y@;4F n/
*/ oh '\,zpL
public void sort(int[] data) { LF'M!C9|
int[] temp=new int[data.length]; yJaQcGxE"
mergeSort(data,temp,0,data.length-1); wl{Fx+<^3
} U}xQUFT|
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private void mergeSort(int[] data, int[] temp, int l, int r) { .wrNRU7s
int i, j, k; =a`l1zn8=
int mid = (l + r) / 2; ~-,P1u!
if (l == r) `A.!<bO)]
return; <}RU37,W
if ((mid - l) >= THRESHOLD) 5#zwdoQ
mergeSort(data, temp, l, mid); g1Q^x/
else 2&E1)^
insertSort(data, l, mid - l + 1); [?<"SJ,`
if ((r - mid) > THRESHOLD) /3*75
mergeSort(data, temp, mid + 1, r); ny5= =C{9
else |H.(?!nTb
insertSort(data, mid + 1, r - mid); q|,I\H5}
v/]Bo[a
for (i = l; i <= mid; i++) { rl^_RI
temp = data; XelY?Ph,,
} zh$[UdY6
for (j = 1; j <= r - mid; j++) { q/,W'lQ\;
temp[r - j + 1] = data[j + mid]; MOJ-q3H^W
} 6&=xu|M<x=
int a = temp[l]; <^&NA<2
int b = temp[r]; kb?QQ\e
for (i = l, j = r, k = l; k <= r; k++) { Dg]ua5jk
if (a < b) { G?)vqmJ%
data[k] = temp[i++]; Eb`U^*A
a = temp; A6'G%of
} else { Urhh)i
data[k] = temp[j--]; =5EG}@
b = temp[j]; jNN$/ZWm
} I"E5XVC);
} NDhHU#Q9
} [8/E ;h
3LZ0EYVL
/** @]Ye36v0#L
* @param data hu-fwBK
* @param l byM/LE7)
* @param i +XU*NAD,!
*/ NYD#I{h
private void insertSort(int[] data, int start, int len) { [{_JO+)+n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6uQfe?aD
} 9hI4',(rE
} or/Y"\-!
} y&\ J
} raGov`
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堆排序： 8=Di+r
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package org.rut.util.algorithm.support; %@L(A1"#D
lhAwTOn`Q
import org.rut.util.algorithm.SortUtil; lY_E=K]
?Zu=UVb
/** u0h {bu
* @author treeroot 2RKI M(~
* @since 2006-2-2 CD(2A,u)/
* @version 1.0 6OMywGI[Z
*/ $=n|MbFl
public class HeapSort implements SortUtil.Sort{ pB{QO4qn
z2og&|uT
/* (non-Javadoc) &C3J6uCm+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )'M<q,@<(
*/ mFOuE5
public void sort(int[] data) { <tAn2e!
MaxHeap h=new MaxHeap(); ):eX*
h.init(data); *&>1A A
for(int i=0;i h.remove(); St/Hv[H'[E
System.arraycopy(h.queue,1,data,0,data.length); Yt2_*K@rC
} eJ>(SkR:[
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private static class MaxHeap{ J0w[vrs&]
uk_?2?>-5
void init(int[] data){ 0X#tt`;
this.queue=new int[data.length+1]; xfqgK D>
for(int i=0;i queue[++size]=data; "8VCXD
fixUp(size); 5xP\6Nx6&5
} *G$tfb(
} dc_^
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private int size=0; k( 1rp|qf
="3Hc=1?R
private int[] queue; y[S5
UDV,co
public int get() { nCEt*~t9VE
return queue[1]; FJo N"X
} It!%/Y5
Uf{cUY,j_
public void remove() { QvK/31*QG
SortUtil.swap(queue,1,size--); ,JRYG<O_T
fixDown(1); -]\%a=]
} URmx8=q
file://fixdown mgX0@#wFn
private void fixDown(int k) { /<s'@!W
int j; ROr$Sz
while ((j = k << 1) <= size) { ;JA2n\iP,
if (j < size %26amp;%26amp; queue[j] j++; W'rft@J$
if (queue[k]>queue[j]) file://不用交换 wH~Q4)#=o
break; ]q7\
SortUtil.swap(queue,j,k); or\ 2)
k = j; $I~=t{;"XV
} Lp20{R
} ~R7rIP8Wr
private void fixUp(int k) { Lie\3W
while (k > 1) { <WtX> \]l(
int j = k >> 1; \dCoY0Z ;
if (queue[j]>queue[k]) <6U{I '
break; $@+\_f'bU>
SortUtil.swap(queue,j,k); 7*d}6\ %
k = j; ho ?.\Jq
} -MJ6~4k2
} 9mwL\j
15#v|/wI'
} wqyx{W`~w
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} ,SuF1&4
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SortUtil： SQWwxFJ
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package org.rut.util.algorithm; beEdH>
bSU9sg\
import org.rut.util.algorithm.support.BubbleSort; 2X;,s`)
import org.rut.util.algorithm.support.HeapSort; bV|:MW<Wv
import org.rut.util.algorithm.support.ImprovedMergeSort; <_8\}!
import org.rut.util.algorithm.support.ImprovedQuickSort; ' ~lC85
import org.rut.util.algorithm.support.InsertSort; YN9ug3O+
import org.rut.util.algorithm.support.MergeSort; u2y?WcMv
import org.rut.util.algorithm.support.QuickSort; S%-L!V ,
import org.rut.util.algorithm.support.SelectionSort; -4Zf0r1u
import org.rut.util.algorithm.support.ShellSort; :,y V?E6]
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/** W@AZ<(RI:
* @author treeroot G+ Y`65
* @since 2006-2-2 D$;mur'
* @version 1.0 j\f;zb?F
*/ jY$Bns&.w
public class SortUtil { 2!cP[Ck
public final static int INSERT = 1; i;y<gm"
public final static int BUBBLE = 2; 724E(?>J
public final static int SELECTION = 3; }E[S%W[
public final static int SHELL = 4; tx}{E<\>$
public final static int QUICK = 5; }:5r#Cd
public final static int IMPROVED_QUICK = 6; &`Q0&8d5
public final static int MERGE = 7; }7+G'=XI/
public final static int IMPROVED_MERGE = 8; i>_V?OT#5
public final static int HEAP = 9; ]zmY]5
G#@o6r
public static void sort(int[] data) { v)!Rir5
sort(data, IMPROVED_QUICK); 'h%)@q)J)
} M/:kh,3
private static String[] name={ Hwklk9U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" POfvs]
}; ;gTdiwfgZ=
<tMiI)0%
private static Sort[] impl=new Sort[]{ sKB])mf]
new InsertSort(), E).Nu
new BubbleSort(), L,p5:EW8.
new SelectionSort(), {tk42}8k
new ShellSort(), IX']s;b
new QuickSort(), D&0*+6j((
new ImprovedQuickSort(), UMpC2)5
new MergeSort(), :R{Xd{?
new ImprovedMergeSort(), HZ5*PXg~
new HeapSort() q El:2<
}; X2(TuR*t
tk|Ew!M:
public static String toString(int algorithm){ 0qnToV;
return name[algorithm-1]; hvQOwA;e
} !3v!BJ#+,&
}?$d~]t)
public static void sort(int[] data, int algorithm) { y+_GL=J
impl[algorithm-1].sort(data); tcSn`+Bu_`
} h<4WY#Y
D0v!fF~
public static interface Sort { @ >%I\
public void sort(int[] data); &=nwb4
} Uxn_nh
1mwb&j24n3
public static void swap(int[] data, int i, int j) { @E{c P%fv
int temp = data; vK!,vKa.
data = data[j]; F/tBr%RV
data[j] = temp; R,x\VX!|
} =7e~L 3 K
} ={~`0,