[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; %Ni"*\
} ?!y<%&U
int i1=l; ;OZl' . %`
int i2=mid+1; \3`r/,wY
for(int cur=l;cur<=r;cur++){ 33g$mUB
if(i1==mid+1) Lg{M<Q)4
data[cur]=temp[i2++]; }:57Ym)7w
else if(i2>r) 7 j6<
data[cur]=temp[i1++]; B>g(i=E
else if(temp[i1] data[cur]=temp[i1++]; u9fJ:a
else y/+IPR
data[cur]=temp[i2++]; k$ b)
} e, fZ>EJ
} sLUOs]cj
Xyr'rm5+b
} (AZAQ xt
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改进后的归并排序: %77uc9}
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package org.rut.util.algorithm.support; <Xw\:5 F<7
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import org.rut.util.algorithm.SortUtil; yK-DzAv
{ &Vt]9
/** ~;#sj&~
* @author treeroot :IucH%6V
* @since 2006-2-2 tAsap}(
* @version 1.0 RFoCM^
*/ ?tA%A
public class ImprovedMergeSort implements SortUtil.Sort { f-p$4%(
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private static final int THRESHOLD = 10; _s*p$/V\
$ ^@fV=e
/* S=\cF,Zs
* (non-Javadoc) D -d
* x#gZC1$Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fUr%@&~l^
*/ <@P. 'rE
public void sort(int[] data) { LosRjvQ:
int[] temp=new int[data.length]; v3]5`&3~
mergeSort(data,temp,0,data.length-1); )FNn
} CK1A$$gnz
5RAhm0Op~.
private void mergeSort(int[] data, int[] temp, int l, int r) { ^`k;~4'd
int i, j, k; 7hTpjox2
int mid = (l + r) / 2; ?Yzw]ag.
if (l == r) d::9,~
return; OTl9MwW
if ((mid - l) >= THRESHOLD) .>z1BP:(
mergeSort(data, temp, l, mid); YgdQC(ib
else "blq)qo)
insertSort(data, l, mid - l + 1); lV$CBS
if ((r - mid) > THRESHOLD) )K$YL='kX
mergeSort(data, temp, mid + 1, r); ;dPaWS1D
else U!NuiKaQ26
insertSort(data, mid + 1, r - mid); zXD/hM
h8X[*Wme
for (i = l; i <= mid; i++) { n}t9Nf_
temp = data; F]D{[dBf
} *@p"
for (j = 1; j <= r - mid; j++) { 8d_J9Ho
temp[r - j + 1] = data[j + mid]; 7F2 RH 8)
} ` Nf
int a = temp[l]; I=:"Fqj'N
int b = temp[r]; drc-5{M
for (i = l, j = r, k = l; k <= r; k++) { 8|^&~Rl4
if (a < b) { qoOwR[NDcq
data[k] = temp[i++]; qYJ<I'Ux O
a = temp; +Gg|BTTL/
} else { ~_Fx2T:X
data[k] = temp[j--]; ?dbSm3
b = temp[j]; J/Lf(;C_
} L]8z6]j*
} 4\5i}MIS0
} heL`"Y2'y>
IT{c:jo1{`
/** PpKjjA<
* @param data zyhM*eM.7
* @param l ^2);*X>
* @param i GcDA0%i
*/ L9N}lH
private void insertSort(int[] data, int start, int len) { n}_}#(a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2Z%n "z68
} Qrt\bz h/}
} DxwR&S{
} 1ANFhl(l
} y*ZA{
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堆排序： fgeh;cD
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package org.rut.util.algorithm.support; 8lzoiA_9
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import org.rut.util.algorithm.SortUtil; )obgEJ7Y`l
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/** w7.,ch
* @author treeroot qB (Pqv
* @since 2006-2-2 #>("(euXMF
* @version 1.0 f}"eN/T
*/ NLK1IH#
public class HeapSort implements SortUtil.Sort{ T[)!7@4r
5!fOc]]Ow
/* (non-Javadoc) l)*(UZ"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z=) m6\
*/ Ak,JPzT
public void sort(int[] data) { a#"orc j
MaxHeap h=new MaxHeap(); '~Cn+xf4]
h.init(data); )v_v 7 ~H&
for(int i=0;i h.remove(); |=*)a2
System.arraycopy(h.queue,1,data,0,data.length); M:GpyE%
} nj:w1E/R
"3\y~<8%'
private static class MaxHeap{ )~)l^0X
nH&z4-1Y?
void init(int[] data){ NLY=o@<
this.queue=new int[data.length+1]; `_)H aF>/
for(int i=0;i queue[++size]=data; xYCJO(&
fixUp(size); h?p_jI
} E& i (T2c
} in/~' u
n"T ^
private int size=0; tp}/>gU!
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private int[] queue; xi(1H1KN5B
'fl< ac,.
public int get() { 9D+k71"+
return queue[1]; $] "M`h
} ?bVIH?
l[c '%M|N
public void remove() { ,AweHUEn
SortUtil.swap(queue,1,size--); d}zh.O5P!
fixDown(1); ^n0;Q$\
} <O 0Q]`i
file://fixdown Rlk3AWl2u
private void fixDown(int k) { n 5R9<A^
int j; Q&xH
while ((j = k << 1) <= size) { c>K]$;}
if (j < size %26amp;%26amp; queue[j] j++; E&zf<Y
if (queue[k]>queue[j]) file://不用交换 #jW-&a
break; I2WP/
SortUtil.swap(queue,j,k); cJaA*sg
k = j; k:Y\i]#yP
} O^`EuaL
} 0S$k;q
private void fixUp(int k) { (&Rk#iU 2
while (k > 1) { NGSts\D'}
int j = k >> 1; d/ ^IL*O
if (queue[j]>queue[k]) \/YRhQ
break; q+\<%$:u
SortUtil.swap(queue,j,k); sFz0:SqhE
k = j; 3?a`@C&x
} wQUl!s7M;
} &&9|;0<
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} W&Fm;m@M
k3qQU)
} 8#yu.\N.xt
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SortUtil： d-B+s%>D
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package org.rut.util.algorithm; __'4Qt
uL^; i""
import org.rut.util.algorithm.support.BubbleSort; xj;:B( i
import org.rut.util.algorithm.support.HeapSort; K<*6E@+i
import org.rut.util.algorithm.support.ImprovedMergeSort; Q}@t'
import org.rut.util.algorithm.support.ImprovedQuickSort; xyL)'C
import org.rut.util.algorithm.support.InsertSort; B#S8j18M
import org.rut.util.algorithm.support.MergeSort; h'-4nu;*
import org.rut.util.algorithm.support.QuickSort; 8C@u+tx
import org.rut.util.algorithm.support.SelectionSort; /S]RP>cQ
import org.rut.util.algorithm.support.ShellSort; ;7z6B|8
?'TK~,dG/
/** isL zgN%
* @author treeroot q7Hf7^a
* @since 2006-2-2 _x<NGIz
* @version 1.0 %US&`BT!
*/ ;yomaAr
public class SortUtil { )~wKRyQff
public final static int INSERT = 1; S4_/%~?
public final static int BUBBLE = 2; Pj <U|\-?
public final static int SELECTION = 3; d j\Z}[
public final static int SHELL = 4; XYzaSp=bb
public final static int QUICK = 5; T<pG$4_
public final static int IMPROVED_QUICK = 6; w-pgtO|Us
public final static int MERGE = 7; ce\d35x!
public final static int IMPROVED_MERGE = 8; RH;ulAD6(~
public final static int HEAP = 9; \s&Mz;:
'-%1ILK$3r
public static void sort(int[] data) { .@,t}:lD
sort(data, IMPROVED_QUICK); d#0:U Y%~
} z9ADF(J?0'
private static String[] name={ ]@Zv94Z(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6i[Ts0H%<!
}; >NBc-DX^
3@I0j/1#k1
private static Sort[] impl=new Sort[]{ />S^`KSTM
new InsertSort(), -j3Lgm
new BubbleSort(), CK7([>2
new SelectionSort(), xUdGSr50
new ShellSort(), wli cuY?
new QuickSort(), JLE&nbKS
new ImprovedQuickSort(), =NtHV4=b
new MergeSort(), gPKf8{#%e
new ImprovedMergeSort(), %LMpErZO
new HeapSort() "V>}-G&
}; %i9 e<.Ot
+=8wZ]
public static String toString(int algorithm){ mF;mJq<d
return name[algorithm-1]; h+1|.d
} skcyLIb
`MSig)V
public static void sort(int[] data, int algorithm) { cuQ!"iH
impl[algorithm-1].sort(data); 4]U=Y>\Sr
} _cs(f<>oCO
T o["o!(;z
public static interface Sort { }d?;kt
public void sort(int[] data); d^}p#7mB\
} H]/~ #a
031"D*W'i
public static void swap(int[] data, int i, int j) { {Ge{@1
int temp = data; UN.;w3`Oc
data = data[j]; {1Ra|,;
data[j] = temp; (+|+ELfqW
} 5I2,za&e
} QXZXj#`