[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; n&4N[Qlv,
} u{cW:
int i1=l; {lzWrUGO
int i2=mid+1; 4i;{!sT
for(int cur=l;cur<=r;cur++){ 2QcOR4_V
if(i1==mid+1) !qQl@jO
data[cur]=temp[i2++]; 1s&zMWC
else if(i2>r) F~vuM$+d
data[cur]=temp[i1++]; ?=msH=N<l
else if(temp[i1] data[cur]=temp[i1++]; ! I:%0D
else 9<?M8_
data[cur]=temp[i2++]; KZY}%il!`
} VT)oLj/A
} u@)U"FZ
Wis~$"
} k .;j
Xu'&ynID
改进后的归并排序: ~vhE|f
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package org.rut.util.algorithm.support; x_}:D *aI
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import org.rut.util.algorithm.SortUtil; 76Cl\rV
K7B/s9/xs
/** -);Wfs
* @author treeroot >2)OiQ`zg
* @since 2006-2-2 [S%_In
* @version 1.0 {<p?2E
*/ ZQsJL\x[UK
public class ImprovedMergeSort implements SortUtil.Sort { {]!mrAjD
YlQ=5u^+
private static final int THRESHOLD = 10; M)+H{5bt
=ho}oL,ZO
/* t|\%VC
* (non-Javadoc) ek\ xx
* u%KTNa0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~H_/zK6e
*/ #Y`~(K47
public void sort(int[] data) { 3S@7]Pg
int[] temp=new int[data.length]; ~ 'cmSiz-
mergeSort(data,temp,0,data.length-1); c|y(2K)o[=
} (Z q/
6I4\q.^qw
private void mergeSort(int[] data, int[] temp, int l, int r) { .GXBc
int i, j, k; P6`u._mX
int mid = (l + r) / 2; jXx<`I+]
if (l == r) @f~RdO3
return; -HbC!wv
if ((mid - l) >= THRESHOLD) O, wJR
mergeSort(data, temp, l, mid); -UEZ#Q
else z+wA rPxc
insertSort(data, l, mid - l + 1); =`F(B
if ((r - mid) > THRESHOLD) &X ):4
mergeSort(data, temp, mid + 1, r); 'Cfl*iNb
else . B9iLI
insertSort(data, mid + 1, r - mid); qp}Cqi
*b}HNX|
for (i = l; i <= mid; i++) { 3?9IJ5p
temp = data; py!|\00}
} `Bp.RXsd*
for (j = 1; j <= r - mid; j++) { :yr+vcD?
temp[r - j + 1] = data[j + mid]; Su7?;Oh/yI
} A*2jENgci
int a = temp[l]; )JLdO*H
int b = temp[r]; u#$]?($}d
for (i = l, j = r, k = l; k <= r; k++) { a=9:[
if (a < b) { !8d{q)JZ
data[k] = temp[i++]; c /HHy,
a = temp; 61>.vT8P
} else { vhW2PzHFRi
data[k] = temp[j--]; GqvpA# i
b = temp[j]; HGs $*
} 9G#n 0&wRJ
} r&JgLC(
} dI(@ZV{
R6Km\N
/** Fn;SF4KOm
* @param data .m,_N@,
* @param l O7m(o:t x3
* @param i VU(v3^1"
*/ :'-/NtV)o?
private void insertSort(int[] data, int start, int len) { 9@(PWz=`?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); feDlH[$
} qZtzO2Mt
} {yHCXFWlS
} !Vn\u
} 8B K(4?gC
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堆排序： !}#8)?p
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package org.rut.util.algorithm.support; |&+o^
(l~AV9!m:
import org.rut.util.algorithm.SortUtil; 2^[`eg
XH4
/** 0WW2i{7`U
* @author treeroot A5I)^B<(
* @since 2006-2-2 eCU:Q
* @version 1.0 #4Rx]zW^%
*/ ArI2wM/v
public class HeapSort implements SortUtil.Sort{ pHXm>gTd,J
6 6EV$*dRL
/* (non-Javadoc) u"cV%(#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C\Wmq [
*/ *k(XW_>
public void sort(int[] data) { RNEp4x
MaxHeap h=new MaxHeap(); taHJ ub
h.init(data); %op**@4/t\
for(int i=0;i h.remove(); 1y@i}<9F
System.arraycopy(h.queue,1,data,0,data.length); _lJ!R:*
} _/s$ZCd
)np:lL$$
private static class MaxHeap{ Olt?~}
v!-/&}W)1
void init(int[] data){ pSH=%u>
this.queue=new int[data.length+1]; 8?#/o c
for(int i=0;i queue[++size]=data; .GPT!lDc
fixUp(size); V5nwu#
} #?aPisV X>
} 7?!d^$B
Tj`,Z5vy
private int size=0; T?CdZc.
Drgv`z
private int[] queue; k<nZ+! M
b;B%q$sntC
public int get() { YlJ@XpKM
return queue[1]; Gi|w}j_
} +6M}O[LP
R6<X%*&%
public void remove() { }^~F|
SortUtil.swap(queue,1,size--); 7FP*oN?
fixDown(1); hn7# L
} Ws3)gvpPA
file://fixdown 64 wv<r]5j
private void fixDown(int k) { u OmtyX
int j; *k7+/bU~~
while ((j = k << 1) <= size) { Fj8z
if (j < size %26amp;%26amp; queue[j] j++; n:I,PS0H<
if (queue[k]>queue[j]) file://不用交换 q5J5>
break; .ljnDL/
SortUtil.swap(queue,j,k); o=:9y-nH
k = j; '2A)}uR
} /Iu1L#
} dK$XNi13.5
private void fixUp(int k) { q<x/Hat)
while (k > 1) { ;0]aq0_#(
int j = k >> 1; G=s}12/Z"{
if (queue[j]>queue[k]) 6fE7W>la
break; 58}U^IW
SortUtil.swap(queue,j,k); :_`F{rDB
k = j; y1jCg%'H
} H*?t^
} <yV"6/l0
XAD- 'i
} nSDMOyj+
o)M}!MT
} NR$3%0 nC6
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SortUtil： Y Vt% 0
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package org.rut.util.algorithm; B-RjMxX4>
2lZ Q)
import org.rut.util.algorithm.support.BubbleSort; np|Sy;:
import org.rut.util.algorithm.support.HeapSort; Q^P}\wb>
import org.rut.util.algorithm.support.ImprovedMergeSort; [~+wk9P
import org.rut.util.algorithm.support.ImprovedQuickSort; ?>9/#Nv
import org.rut.util.algorithm.support.InsertSort; zF`0J
import org.rut.util.algorithm.support.MergeSort; L8@f-Kk
import org.rut.util.algorithm.support.QuickSort; [Q~#82hBhY
import org.rut.util.algorithm.support.SelectionSort; B9_X;c
import org.rut.util.algorithm.support.ShellSort; EgEa1l!NSQ
B6+khuG(
/** P_^ +A
* @author treeroot O0x,lq
* @since 2006-2-2 J/`<!$<c
* @version 1.0 TIqtF&@o4
*/ ^cC,.Fdw
public class SortUtil { c1(RuP:S
public final static int INSERT = 1; ;$,U~0
public final static int BUBBLE = 2; ~Y[r`]X`"m
public final static int SELECTION = 3; EmWn%eMN
public final static int SHELL = 4; oi7@s0@
public final static int QUICK = 5; UkwP
public final static int IMPROVED_QUICK = 6; Rxt^v+ ,$
public final static int MERGE = 7; *uRBzO}
public final static int IMPROVED_MERGE = 8; )th<,Lo3#
public final static int HEAP = 9; n: ^ d|@
D(op)]8
public static void sort(int[] data) { &GO}|W
sort(data, IMPROVED_QUICK); T9|m7
} HQ_Ok`
private static String[] name={ XAKs0*J>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ah$b[\#C
}; Vi$~-6n&
23eX;gL
private static Sort[] impl=new Sort[]{ +zN-!5x
new InsertSort(), RZ?jJm$
new BubbleSort(), edq4D53
new SelectionSort(), oAVnK[EMq`
new ShellSort(), tmYz R%i
new QuickSort(), |-67\p]
new ImprovedQuickSort(), ea2ayT
new MergeSort(), J7$5s
new ImprovedMergeSort(), `:fZ)$sY
new HeapSort() \A#41
}; Lnl(2xD
CJx|?yK2
public static String toString(int algorithm){ U[-o> W#
return name[algorithm-1]; dh iuI|?@
} oUlY?x1
3AtGy'NTp
public static void sort(int[] data, int algorithm) { !;v|'I
impl[algorithm-1].sort(data); VQt0 4?
} R$<&ie6UQ
'3tCH)s
public static interface Sort { !sP{gi#=
public void sort(int[] data); <oV(7
} CNyIQ}NJ
'3fu
public static void swap(int[] data, int i, int j) { e{K 215
int temp = data; 1N-\j0au
data = data[j]; prF%.(G2)
data[j] = temp; I-*S&SiXjI
} 9wwqcx)3(
} Do7Tj