[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; B5b:znW2@
} %6UF%dbYH`
int i1=l; h>-P/
int i2=mid+1; TNX9Z)=>g
for(int cur=l;cur<=r;cur++){ I;(3)^QH#
if(i1==mid+1) at: li
data[cur]=temp[i2++]; 3S^0%"fY
else if(i2>r) #B `?}a=
data[cur]=temp[i1++]; ;_o]$hV|
else if(temp[i1] data[cur]=temp[i1++]; is'V%q
else qt/K$'
data[cur]=temp[i2++]; "-J5!y*,Y
} 4&/CES
} E+f)Zg :
]Bhy=1
} oBzl=N3<
uDf<D.+5Ze
改进后的归并排序: #Y'eS'lv4
j(;^XO Y#
package org.rut.util.algorithm.support; ,,H"?VO
:|S zD4Ag
import org.rut.util.algorithm.SortUtil; !?2)apM
8>Cr6m
/** K\Ea\b[
* @author treeroot 8y;Rw#Dz
* @since 2006-2-2 ]c.w+<
* @version 1.0 wQ}r/2n|^
*/ _P>YG<*"kQ
public class ImprovedMergeSort implements SortUtil.Sort { #[93$)Gd!
8bIP"!=*W
private static final int THRESHOLD = 10; i5,iJe0cA
).T&fa"
/* -%nD'qy,.
* (non-Javadoc) 18X@0e
* g3R(,IH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Q6J$"Tj
*/ N]<(cG&p
public void sort(int[] data) { vQAFgG
int[] temp=new int[data.length]; 5KCB^`|b>t
mergeSort(data,temp,0,data.length-1); nxLuzf4U5
} !X>u.}?g
odRiCiMH
private void mergeSort(int[] data, int[] temp, int l, int r) { 6Rc=!_v^
int i, j, k; !jCgTo y
int mid = (l + r) / 2; i?00!t
if (l == r) v+c>iI
return; d2k-MZuT6
if ((mid - l) >= THRESHOLD) %uW=kr
mergeSort(data, temp, l, mid); gP^2GnjHL8
else 3DU1c?M:
insertSort(data, l, mid - l + 1); r*X,]\V0x
if ((r - mid) > THRESHOLD) Z>[7#;;
mergeSort(data, temp, mid + 1, r); &Y@i:O
else }X(&QZ7i`
insertSort(data, mid + 1, r - mid); 7Cgi&
^^y eC|~N:
for (i = l; i <= mid; i++) { fgLjF,Y
temp = data; / 3A6xPOg
} *Gsj pNr-
for (j = 1; j <= r - mid; j++) { +y7z>Fwl
temp[r - j + 1] = data[j + mid]; ua\t5M5
} kaG/8G(
int a = temp[l]; BZR{}Aj4pa
int b = temp[r]; 0[;2dc
for (i = l, j = r, k = l; k <= r; k++) { X>q`F;W
if (a < b) { ;KeU f(tH
data[k] = temp[i++]; ]hl*6
a = temp; 12$0-@U
} else { >)><u4}
data[k] = temp[j--]; _)A|JC!jId
b = temp[j]; 8tY>%A~^z
} 7& M-^Ev
} SI(f&T(
} |,8z"g
|s8N
/** M`MxdwR
* @param data c-LzluWi
* @param l N& _~y|
* @param i Ni$'# W?t
*/ Epzg|L1)
private void insertSort(int[] data, int start, int len) { f?3-C8hU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NOb`)qb
} "oP^2|${
} z;OYPGvkw
} !avol/*
} +WX/4_STV
}gp@0ri%5
堆排序： B(Sy.n
[&x9<f6
package org.rut.util.algorithm.support; 2q f|+[X
MP]<m7669*
import org.rut.util.algorithm.SortUtil; j3-YZKpg
`Sod]bO +U
/** 4u{S?Ryy
* @author treeroot Y&|Z*s+ +}
* @since 2006-2-2 m5Bf<E,c
* @version 1.0 bR\7j+*&
*/ XS<>0YM
public class HeapSort implements SortUtil.Sort{ $vn6%M[
3JazQU
/* (non-Javadoc) 2e48L677-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d;i|s[6ds`
*/ A5l Cc b
public void sort(int[] data) { 7ZcF0h
MaxHeap h=new MaxHeap(); ycA<l"
h.init(data); PKm|?kn{0(
for(int i=0;i h.remove(); $l.*;h*
System.arraycopy(h.queue,1,data,0,data.length); qwTz7r
} i~B?p[
8}/DD^M
private static class MaxHeap{ 0G%9 @^B
s!6lZ mPM
void init(int[] data){ n#_B4UqW%
this.queue=new int[data.length+1]; u{1R=ML
for(int i=0;i queue[++size]=data; Ky3mzw|
fixUp(size); 2& Q\W
} lu utyK!
} qF)J#$4;6
u?').c4
private int size=0; awLvLkQb{
a~o<>H
private int[] queue; XF`2*:7
P^Hgm
public int get() { +Y;P*U}Qg[
return queue[1]; Mz+I YP`L
} h>Kx
1" '3/MFQ8
public void remove() { Ple.fKu
SortUtil.swap(queue,1,size--); n ]%2Kx
fixDown(1); !$I~3_c
} 5epI'D
file://fixdown a@}.96lStD
private void fixDown(int k) { iTxWXij
int j; SmXJQ@jN
while ((j = k << 1) <= size) { 7?lz$.*Avp
if (j < size %26amp;%26amp; queue[j] j++; Bk8}K=%w
if (queue[k]>queue[j]) file://不用交换 <JPN< Kv
break; cXweg;
SortUtil.swap(queue,j,k); ,05PYBc3
k = j; "1o{mvCkR
} 7lC$UQx8
} !z?
private void fixUp(int k) { MGdzrcF
while (k > 1) { "M%R{pGA7
int j = k >> 1; 8t+eu O
if (queue[j]>queue[k]) ]4~Yi1]
break; +IZ=E >a
SortUtil.swap(queue,j,k); VZ]iep
k = j; D]]e6gF$e
} zCs34=3D[
} HcRw9,I'
dCx63rF`G
} uYW4$6S3
&1\/B
} ,GOIg|51
rFzNdiY
SortUtil： W]4Z4&
Jv~R/qaaD
package org.rut.util.algorithm; +%5L2/n7
<H64L*,5'7
import org.rut.util.algorithm.support.BubbleSort; :8S;34Y;
import org.rut.util.algorithm.support.HeapSort; 74e=zW?
import org.rut.util.algorithm.support.ImprovedMergeSort; b42%^E
import org.rut.util.algorithm.support.ImprovedQuickSort; hB[bth
import org.rut.util.algorithm.support.InsertSort; vNi;)"&*
import org.rut.util.algorithm.support.MergeSort; ^} {r@F
import org.rut.util.algorithm.support.QuickSort; *F$@!ByV
import org.rut.util.algorithm.support.SelectionSort; TE`5i~R*
import org.rut.util.algorithm.support.ShellSort; s,R:D).
T CT8OU|
/** 74^v('-2
* @author treeroot Iv6 lE:)
* @since 2006-2-2 FDoPW~+[
* @version 1.0 txEN7!
*/ b'4a;k!rS
public class SortUtil { @&T' h}|:
public final static int INSERT = 1; {7y;s
public final static int BUBBLE = 2; \g0vzo"u
public final static int SELECTION = 3; [^!SkQ
public final static int SHELL = 4; S5>s&
public final static int QUICK = 5; !~ o%KQt
public final static int IMPROVED_QUICK = 6; [$3+5K#
public final static int MERGE = 7; 2V~E <K-
public final static int IMPROVED_MERGE = 8; UfW=/T
public final static int HEAP = 9; ]9!y3"..W{
SIK:0>yK"
public static void sort(int[] data) { 0E\#!L
sort(data, IMPROVED_QUICK); 7_~sa{1R.
} O_ _s~
private static String[] name={ Mi]^wCF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (KI9j7
}; K6{wM
#1dVp!?3T
private static Sort[] impl=new Sort[]{ tSy 9v
new InsertSort(), |JkfAnrN$I
new BubbleSort(), %9YY \a {
new SelectionSort(), "#)|WVa=BM
new ShellSort(), /xX7:U b
new QuickSort(), f@}>:x
new ImprovedQuickSort(), f y2vAwl
new MergeSort(), w|dfl *
new ImprovedMergeSort(), +~n:*\
new HeapSort() 9]Jv >_W*
}; e&sH<hWR
<F^9ML+'
public static String toString(int algorithm){ \Zf=A[
return name[algorithm-1]; ByqVNz0L
} QC'Ru'8S
i]n2\v AG
public static void sort(int[] data, int algorithm) { cGm3LS6]*
impl[algorithm-1].sort(data); I`{3I-E
} xLed];2G
%P}H3;2
public static interface Sort { %OoH<\w w
public void sort(int[] data); kA=5Kc
} kq| !{_
HMVP71
public static void swap(int[] data, int i, int j) { yjT>bu]
int temp = data; DN:| s+Lz
data = data[j]; {Q>OZm\+
data[j] = temp; A=kOSq 4Q
} Cab-:2L]
} 1$RJzHS