[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; &S8,-~U
} ["15~9
int i1=l; a6 w'.]m
int i2=mid+1; 9z7rv,
for(int cur=l;cur<=r;cur++){ HrHtA]
if(i1==mid+1) b&*N
data[cur]=temp[i2++]; JwdvY]
else if(i2>r) &)!4rABn
data[cur]=temp[i1++]; _J>!K'Dz
else if(temp[i1] data[cur]=temp[i1++]; .Xk#Cwm'
else ^a=V.
data[cur]=temp[i2++]; !G;|~|fMV
} ]4]AcJj
} =L*-2cE6#
C%AN4Mo
} &+ UnPE(
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改进后的归并排序: EKNmXt1 lE
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package org.rut.util.algorithm.support; !YX_k<1E
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import org.rut.util.algorithm.SortUtil; S.!K
jz,Gj}3;
/** zh9B8r)C
* @author treeroot ~{l @
* @since 2006-2-2 [I78<IJc
* @version 1.0 r)oR`\7
*/ R6\|:mI,$
public class ImprovedMergeSort implements SortUtil.Sort { rAA?{(!9x
k<y~n*{_
private static final int THRESHOLD = 10; p:3 V-$4X
4VHX4A}CgA
/* ;nKhmcQ4
* (non-Javadoc) eHUb4,%P
* 0Z jE(3i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H6<3'P
*/ u^( s0q
public void sort(int[] data) { Fz2CXC
int[] temp=new int[data.length]; r:H.VAD
mergeSort(data,temp,0,data.length-1); (1)b> 6
} yHn8t]{
tkW7wP;
private void mergeSort(int[] data, int[] temp, int l, int r) { i&0Zli
int i, j, k; O&r9+r1`
int mid = (l + r) / 2; ,D\}DJ`)C
if (l == r) 7$Lt5rn"}
return; #2;8/"v
if ((mid - l) >= THRESHOLD) &90pKs
mergeSort(data, temp, l, mid); E=t^I/f)E
else gQuU_dbXSB
insertSort(data, l, mid - l + 1); 3V3q vd
if ((r - mid) > THRESHOLD) Dp^6|T*HU
mergeSort(data, temp, mid + 1, r); lKV7IoJ&;
else fhmBKeFdV
insertSort(data, mid + 1, r - mid); '}E"Mdb
s"x(i
for (i = l; i <= mid; i++) { T2 /u7<D-
temp = data; /@0
} <"nF`'olV
for (j = 1; j <= r - mid; j++) { (>`S{L C>s
temp[r - j + 1] = data[j + mid]; ]s`cn}d
} LXm@h
int a = temp[l]; /l;_ xs
int b = temp[r]; )u]1j@Id
for (i = l, j = r, k = l; k <= r; k++) { #=#bv`
if (a < b) { 60r0O5=|Fl
data[k] = temp[i++]; `Db%:l^e
a = temp; G4wJv^6i9
} else { Wx8n)
data[k] = temp[j--]; ]Ryg}DOQ
b = temp[j]; n1rJ^q-G
} U[6 ~ad a
} G4G<Ow)`
} "MgTfUIiyD
!qTP
/** "O8iO!:
* @param data 9XX:_9|I
* @param l '3TfW61]
* @param i 51`*VR]`K
*/ _vUId?9@+e
private void insertSort(int[] data, int start, int len) { #-kx$(''V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @[~j|YH}
} >[4CQK`U
} nk2H^RM^
} q5~"8]Dls
} @Op7OFY%
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堆排序： *OHaqe(*
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package org.rut.util.algorithm.support; Q'0:k{G
oPrK{flm
import org.rut.util.algorithm.SortUtil; LT]YYn($
IQ5'4zQg=
/** r_pZK(G%
* @author treeroot )V9wU1.
* @since 2006-2-2 nS]Ih0(K
* @version 1.0 o^+g2;Ro
*/ +7j7zpw
public class HeapSort implements SortUtil.Sort{ OK%d1M^8j
vGD D
/* (non-Javadoc) e]D TK*W~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~2O1$ou
*/ m*` W&k[
public void sort(int[] data) { 3($tD*!o
MaxHeap h=new MaxHeap(); sDjbvC0
h.init(data); n(j5dN>]
for(int i=0;i h.remove(); \6vr)1~N>
System.arraycopy(h.queue,1,data,0,data.length); -8z@FLUK-
} (~]0)J
`9Q O'^)
private static class MaxHeap{ ~Q+J1S]Fs
@%I-15Jz
void init(int[] data){ j0A9;AP;;C
this.queue=new int[data.length+1]; CMU\DO
for(int i=0;i queue[++size]=data; j "e]Ui
fixUp(size); JF(&+\i<p
} #=czqZw
} -"d&Ow7o
-x+K#T0Z
private int size=0; d ZxrIWx
MR.c?P?0Q
private int[] queue; f# sDG
Ummoph7_@
public int get() { }W nvz;]B
return queue[1]; :F?L,I,K
} @}hdMVi
I?KGb:]|
public void remove() { Q,nXc
SortUtil.swap(queue,1,size--); +]0/:\(B
fixDown(1); 8WLBq-]G
} 3W55m@w
file://fixdown a+P^?N
private void fixDown(int k) { 'h`)6{
int j; H+ 7Fw'u
while ((j = k << 1) <= size) { YeVkX{y
if (j < size %26amp;%26amp; queue[j] j++; gS.,V!#t
if (queue[k]>queue[j]) file://不用交换 ? ;$f"Wl
break; 73kI%nNB
SortUtil.swap(queue,j,k); 5]Y?NN,GR
k = j; ; e)vk|
} hGj`IAW
} \ 6 :7
private void fixUp(int k) { JO&+W^$uY}
while (k > 1) { ;f9a0Vs
int j = k >> 1; )\QPUdOvx
if (queue[j]>queue[k]) 5k`Df/
break; tWITr
SortUtil.swap(queue,j,k); 5.F/>?<
k = j; #NQx(C
} -~&T0dt~
} KdLj1T
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} U9x6\Iy
;#ElJXS
} "]x#kM
.12H/F
SortUtil： vec4R )S
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package org.rut.util.algorithm; {@ Z%6%'9
*&$2us0%%
import org.rut.util.algorithm.support.BubbleSort; 6U%F mE@
import org.rut.util.algorithm.support.HeapSort; Sj@VOW
import org.rut.util.algorithm.support.ImprovedMergeSort; SVqKG+{My
import org.rut.util.algorithm.support.ImprovedQuickSort; eOs4c`
import org.rut.util.algorithm.support.InsertSort; $Sc;
import org.rut.util.algorithm.support.MergeSort; u'qc=5
import org.rut.util.algorithm.support.QuickSort; jl,>0MA
import org.rut.util.algorithm.support.SelectionSort; mLH,6rO9
import org.rut.util.algorithm.support.ShellSort; x1`zD*{
=|_k a8{?
/** M6"a w6
* @author treeroot {{ +8oRzY
* @since 2006-2-2 #EIcP=1m4
* @version 1.0 fU^5Dl
*/ zI.:1(,
public class SortUtil { =iE)vY,?"}
public final static int INSERT = 1; Gw?ueui<
public final static int BUBBLE = 2; -[xbGSj{
public final static int SELECTION = 3; t^8|t(Lq
public final static int SHELL = 4; "hLmwz|a
public final static int QUICK = 5; ~otV'=/my
public final static int IMPROVED_QUICK = 6; `2@f=$B
public final static int MERGE = 7; c[;=7-+
public final static int IMPROVED_MERGE = 8; o~ReeZ7)Zg
public final static int HEAP = 9; mjJ/rx{kbw
xOdLct
public static void sort(int[] data) { -\V;Gw8mD
sort(data, IMPROVED_QUICK); Zxn>]Z_
} 7nk3^$|
private static String[] name={ j:xm>X'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uF<\|y rFt
}; YL9Tsw
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private static Sort[] impl=new Sort[]{ vfOG(EkG.?
new InsertSort(), T,5(JP(h3
new BubbleSort(), NU.YL1
new SelectionSort(), o;'-^ LJ
new ShellSort(), z i3gE$7
new QuickSort(), Jp +h''t
new ImprovedQuickSort(), Ql?>,FZ
new MergeSort(), 9 N9Q#o$!.
new ImprovedMergeSort(), F{FSmUxzK
new HeapSort() JwcC9 O
}; RgLkAHA
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public static String toString(int algorithm){ b%|6y
return name[algorithm-1]; Pt?d+aBtV
} [G7S
XA-,
public static void sort(int[] data, int algorithm) { "In$|A\?E
impl[algorithm-1].sort(data); <gx"p#JbZ
} g/`z.?
K#a_7/!v/
public static interface Sort { !-s6B
public void sort(int[] data); uEDvdd#V.
} >(eR0.x
[_zoJ
public static void swap(int[] data, int i, int j) { o`7B@]
int temp = data; `&g1`vg
data = data[j]; Cp^%;(@
data[j] = temp; iK9#{1BpML
} og8"#%
} +3o 4KB}