[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; |+mOH#Aty
} wLSjXpP8
int i1=l; hLn&5jYHvt
int i2=mid+1; 5F03y`@ u
for(int cur=l;cur<=r;cur++){ <[FS%2,0mb
if(i1==mid+1) ])68wqD
data[cur]=temp[i2++]; af^@ .$ |
else if(i2>r) :7k`R62{
data[cur]=temp[i1++]; X@eg<]'m
else if(temp[i1] data[cur]=temp[i1++]; !xJFr6G~8
else >+f'!*%7He
data[cur]=temp[i2++]; o] S`+ZcV
} K9}jR@jy$
} dc)wu]
iUpSN0XkMM
} mR6E]TuM
i63?"
改进后的归并排序: D~7%};D[
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package org.rut.util.algorithm.support; n<+~ zQ
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import org.rut.util.algorithm.SortUtil; %!D_q~"H
a\Tr!Be,
/** =cknE=
* @author treeroot *SXSF95
* @since 2006-2-2 QM7[O]@
* @version 1.0 @t "~
*/ \(wn@/yP'
public class ImprovedMergeSort implements SortUtil.Sort { !+%Az*ik
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private static final int THRESHOLD = 10; r$Yh)rpt:
% d4+Ctrp-
/* 55(J&q
* (non-Javadoc) ]9dx3<2_I
* <[esA9.]t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eR(\s_`
*/ KC#kss
public void sort(int[] data) { J,.j_ii`!
int[] temp=new int[data.length]; WFQ*s4 R(
mergeSort(data,temp,0,data.length-1); q.U*X5
} !4i,%Z&6
PjiNu.>2(
private void mergeSort(int[] data, int[] temp, int l, int r) { ^n6)YX
int i, j, k; d%S=$}o
int mid = (l + r) / 2; C+ZQB)gn
if (l == r) Ompi~
return; qr7 X-[&
if ((mid - l) >= THRESHOLD) z(c@(UD-_
mergeSort(data, temp, l, mid); s@.`"TF.7
else )w^GPlh
insertSort(data, l, mid - l + 1); TW'E99wG
if ((r - mid) > THRESHOLD) e4[-rkn{hl
mergeSort(data, temp, mid + 1, r); `%KpTh
else *1 n;p)K
insertSort(data, mid + 1, r - mid); VyB\]EBu
-G(3Y2
for (i = l; i <= mid; i++) { 3P%w-qT!N
temp = data; |G|*
} =$&7IQ?
for (j = 1; j <= r - mid; j++) { \7OJN ~&<
temp[r - j + 1] = data[j + mid]; r\4*\
} OL,/-;z6
int a = temp[l]; !C9ps]6
int b = temp[r]; rTWh(8T
for (i = l, j = r, k = l; k <= r; k++) { YlZYS'_
if (a < b) { 7F>gj
data[k] = temp[i++]; H9oXZSm
a = temp; #i}#jMT
} else { /k4^&
data[k] = temp[j--]; OpWC2t)
b = temp[j]; .E?bH V
} chvrHvByS
} 4*@G&v?n
} zgEr,nF
vkDZv@
/** 3I(dC|d
* @param data f}Ne8]U/Hc
* @param l R=#q"9qz
* @param i -6hu31W
*/ ~u O:tL
private void insertSort(int[] data, int start, int len) { s0~05{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {<''OwQF~+
} 'xLM>6[wz
} tEpIyC
} j`[yoAH
} =UI,+P:
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堆排序： F]URf&U
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package org.rut.util.algorithm.support; J_y<0zF**
(`q6G d
import org.rut.util.algorithm.SortUtil; m<X#W W)N
"/ a*[_sV
/** _G-bL;
* @author treeroot ?9wFV/
* @since 2006-2-2 !4qps$p{
* @version 1.0 p[af[!
*/ YYZs#_
public class HeapSort implements SortUtil.Sort{ CA~em_dC
V8KTNt%
/* (non-Javadoc) FthXFxwx$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LP0;n\
*/ 6.`}&E
public void sort(int[] data) { !R] CmK
MaxHeap h=new MaxHeap(); .dg 4gr\D
h.init(data); P0`>{!r6@
for(int i=0;i h.remove(); OTNZ!U/)j
System.arraycopy(h.queue,1,data,0,data.length); X1 0"G~0
} -6em*$k^
Xd19GP!
private static class MaxHeap{ [pRVZV
v ,G-k2$Qe
void init(int[] data){ c|R3,<Q]
this.queue=new int[data.length+1]; cW~6@&zp
for(int i=0;i queue[++size]=data; ]$?zT`>(F
fixUp(size); m"?'hR2
} \U<F\i
} k Nf!j
W=;(t
private int size=0; YN5OuKMUd'
R5'Z4.~
private int[] queue; v4,syd*3|V
kw}ISXz v
public int get() { 9Ww=hfb5UW
return queue[1]; *'`3]!A
} lo>-}xd
9m#H24{V'
public void remove() { 9+N._u
SortUtil.swap(queue,1,size--); =JySY@?9
fixDown(1); 9`gGsC
} !7,K9/"
file://fixdown @6I[{{>X
private void fixDown(int k) { Jq?^8y
int j; S7#^u`'Q_^
while ((j = k << 1) <= size) { LfjS[
if (j < size %26amp;%26amp; queue[j] j++; KH@) +Rj
if (queue[k]>queue[j]) file://不用交换 l;][Q]Z@V
break; ?O.6r"
SortUtil.swap(queue,j,k); mn6p s6OB
k = j; v @I^:I
} 1TD&&EC
} i-"h"nF"
private void fixUp(int k) { gne#v
while (k > 1) { yw3U"/yw
int j = k >> 1; tUAY]BJ*s
if (queue[j]>queue[k]) (8m\#[T+R
break; %unK8z
SortUtil.swap(queue,j,k); 1,;qXMhK`;
k = j; H/v37%p7
} *C:q _/
} 6!Tf'#TV~!
Lct+cKKU
} 6_`eTL=G
qS/71Kv'
} I}g|n0o
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SortUtil： ^v'g~+@o
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package org.rut.util.algorithm; 8 *(W |J
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import org.rut.util.algorithm.support.BubbleSort; wHN`- 5%
import org.rut.util.algorithm.support.HeapSort; UNZVu~WnF
import org.rut.util.algorithm.support.ImprovedMergeSort; 9OJ\n|,(
import org.rut.util.algorithm.support.ImprovedQuickSort; y 4,T
import org.rut.util.algorithm.support.InsertSort; s$nfY.C
import org.rut.util.algorithm.support.MergeSort; pg}DC0a
import org.rut.util.algorithm.support.QuickSort; MS*Mem,
import org.rut.util.algorithm.support.SelectionSort; Q&U= jX
import org.rut.util.algorithm.support.ShellSort; n.H`1@
Kjca>/id
/** in;+d~?
* @author treeroot `v/tf|v6
* @since 2006-2-2 eQ)ioY
* @version 1.0 [9W&1zY
*/ :EldP,s#x%
public class SortUtil { ,9l!fT?iH
public final static int INSERT = 1; '$L= sH5
public final static int BUBBLE = 2; <&m
public final static int SELECTION = 3; 3Ns:O2|
public final static int SHELL = 4; /*R' xBr
public final static int QUICK = 5; PRf\6
public final static int IMPROVED_QUICK = 6; $gD(MKR)~
public final static int MERGE = 7; ;Wrd=)Ka
public final static int IMPROVED_MERGE = 8; s)&R W#:X
public final static int HEAP = 9; =ILo`Q~
<812V8<!
public static void sort(int[] data) { &MGgO\|6
sort(data, IMPROVED_QUICK); Z`1o#yZ
} D<L{Z[
private static String[] name={ h|/*yTuN.y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cB])A57<
}; WZO 0u
$MVeMgPa
private static Sort[] impl=new Sort[]{ W,oV$ s^
new InsertSort(), N@`9 ~JS
new BubbleSort(), wYxFjXm
new SelectionSort(), >8HRnCyp/
new ShellSort(), +w}%gps
new QuickSort(), (S93 %ii
new ImprovedQuickSort(), Z YO/'YW
new MergeSort(), 1~ZHC[ `
new ImprovedMergeSort(), By"ul:.D
new HeapSort() H(ftOd.y
}; %KVRiX
5>k~yaju/
public static String toString(int algorithm){ <HX-qNA?
return name[algorithm-1]; rN!9&
} }j<_JI
#(}_2x5
public static void sort(int[] data, int algorithm) { o>k-~v7
impl[algorithm-1].sort(data); u^eC
} _"e( ^yiK
vH:+
public static interface Sort { KB-#):'
public void sort(int[] data); HQ#L |LN
} ha'm`LiX
tp3N5I
public static void swap(int[] data, int i, int j) { |`9zE]
int temp = data; #2t\>7]
data = data[j]; V\lF:3C
data[j] = temp; JG+o~tQC
} Gqu0M`+7
} #+Gs{iXr