[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; _fk}d[q0
} gN<7(F
int i1=l; ]8%E'd
int i2=mid+1; 6V$ )ym*F
for(int cur=l;cur<=r;cur++){ [c=Wp
if(i1==mid+1) b|AjB:G
data[cur]=temp[i2++]; # l9VTzi
else if(i2>r) nZi&`HjQ
data[cur]=temp[i1++]; MuWZf2C
else if(temp[i1] data[cur]=temp[i1++]; S6M7^_B4F
else h^rG5Q
data[cur]=temp[i2++]; @cIYS%iZ
} NB<8M!X/
} >8{w0hh;
~"%'(j_4
} Ry}4MEq]
2fkyz
改进后的归并排序: &*/= `=:C8
uT=r*p(v
package org.rut.util.algorithm.support; S8AbLl9G@>
AQ$)JPs
import org.rut.util.algorithm.SortUtil; Io<T'K
bp'%UgA)1
/** 5rLx b
* @author treeroot fUf1G{4
* @since 2006-2-2 %iNgHoH
* @version 1.0 sT1k]duT
*/ ffk>IOH
public class ImprovedMergeSort implements SortUtil.Sort { Sydl[c pH$
W3[>IH"+
private static final int THRESHOLD = 10; {f/]K GGk
vmNo~clt\
/* <m\Y$Wv
* (non-Javadoc) xkFa
* [?N,3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rPy,PQG2w
*/ rNhS\1-
public void sort(int[] data) { rF[-4t %
int[] temp=new int[data.length]; c*\i%I#f2
mergeSort(data,temp,0,data.length-1); sHPAr}14
} GmNCw5F
^`#7(S)a/
private void mergeSort(int[] data, int[] temp, int l, int r) { Y.I~.66s
int i, j, k; rr,A Vw
int mid = (l + r) / 2; ;iYCeL(
if (l == r) .BxQF
return; 6, j60`f)
if ((mid - l) >= THRESHOLD) kVZs:
mergeSort(data, temp, l, mid); 3c#^@Bj(-e
else H.iCYD_=
insertSort(data, l, mid - l + 1); >A@yF?
if ((r - mid) > THRESHOLD) 8Ckd.HKpQ
mergeSort(data, temp, mid + 1, r); .0yBI=QI
else *\#<2 QAe
insertSort(data, mid + 1, r - mid); "uuM#@h
U*{0,Ue'
for (i = l; i <= mid; i++) { W2-l_{
temp = data; A?04,l]y
} v(Kj6'
for (j = 1; j <= r - mid; j++) { 0= bXL!]
temp[r - j + 1] = data[j + mid]; LkHH7Pd@
} 7./-|#
int a = temp[l]; Efe(tH2q
int b = temp[r]; +cXi|Zf
for (i = l, j = r, k = l; k <= r; k++) { 8h)7K/!\
if (a < b) { mI<sf?.
data[k] = temp[i++]; Xk!{UxQKQ
a = temp; 0x5\{f
} else { <WWZb\"{
data[k] = temp[j--]; %h0BA.r
b = temp[j]; QsKnaRT
} {~]5QKg.
} 3d;J"e+?
} >q?{'#i /
Ys_LGfK
/** 7Oe$Ou
* @param data 2sgp$r
* @param l a{e 2*V
* @param i oH4zW5
*/ ,Gbc4x
private void insertSort(int[] data, int start, int len) { \s)$[pAF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HZ!<dy3
} +68age;dM
} A`~?2LH,~F
} '`gnJX JO
} 6yUThv.G#
L Y4bn)Qf
堆排序： @N[<<k7g
n|T$3j)
package org.rut.util.algorithm.support; F@ |(
HD{u#~8{
import org.rut.util.algorithm.SortUtil; L~h:>I+pG
90F.9rh
/** nfZe"|d
* @author treeroot 'S74Ys=-0
* @since 2006-2-2 ro?.w
* @version 1.0 !Q_Kil.9
*/ \Js*>xA
public class HeapSort implements SortUtil.Sort{ ;D-k\kv
ZvXw#0)v
/* (non-Javadoc) ;[Xf@xf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hsov0
*/ =],c$)
public void sort(int[] data) { v`'Iew }
MaxHeap h=new MaxHeap(); I5[@C<b
h.init(data); o[JZ>nm
for(int i=0;i h.remove(); fTX|vy<EMI
System.arraycopy(h.queue,1,data,0,data.length); j5n"LC+oz
} L`O7-'`
45Zh8k
private static class MaxHeap{ ]RadwH"0!
dpge:Qhr
void init(int[] data){ UWqX}T[^
this.queue=new int[data.length+1]; dci,[TEGu
for(int i=0;i queue[++size]=data; mo4F\$2N
fixUp(size); cw0@Z0
} 41.xi9V2
} Q>\DM'{:4
4u0?[v[Hu
private int size=0; r-WX("Vvh
.W;cz8te
private int[] queue; }43qpJe8U
^xgPL'
public int get() { wwR}h I(
return queue[1]; >x~Qa@s;
} pfl^GgP#
XfIsf9
public void remove() { #{k+^7aQ
SortUtil.swap(queue,1,size--); cj2^wmkB
fixDown(1); 4}0YLwgJ
} ]H`pM9rC
file://fixdown 8U]mr+
private void fixDown(int k) { p? VDBAx
int j; >wYmx4W>
while ((j = k << 1) <= size) { J5f}-W@
if (j < size %26amp;%26amp; queue[j] j++; vkYiO]y
if (queue[k]>queue[j]) file://不用交换 ?vik2RW
break; "ZNy*.G|[
SortUtil.swap(queue,j,k); #'i,'h+F
k = j; B'y)bY'_dS
} M3d%$q)<rW
} 8{&.[SC7
private void fixUp(int k) { / U~yYh
while (k > 1) { &u<%%b|
int j = k >> 1; Gt,VSpb~s
if (queue[j]>queue[k]) HB<>x
break; ]R09-s 0$7
SortUtil.swap(queue,j,k); k0b6X5
k = j; 7~N4~KAUS
} "-IF_Hid
} i\4YT r,
c|iTRco
} {?cF2K#
:yw(Co]f
} d7Cs a c
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SortUtil： @!!5el {
!b$~Sm)
package org.rut.util.algorithm; 8|!"CQJ|H
kexvE 3
import org.rut.util.algorithm.support.BubbleSort; NUuIhB+
import org.rut.util.algorithm.support.HeapSort; >V%.=})K
import org.rut.util.algorithm.support.ImprovedMergeSort; ?;_Mxal'
import org.rut.util.algorithm.support.ImprovedQuickSort; R_:lp\S&
import org.rut.util.algorithm.support.InsertSort; (@*%moo
import org.rut.util.algorithm.support.MergeSort; fQw=z$
import org.rut.util.algorithm.support.QuickSort; DoN]v
import org.rut.util.algorithm.support.SelectionSort; \SJX;7ST
import org.rut.util.algorithm.support.ShellSort; ,RAP_I!_x
-_Z
/** J0t_wMJa
* @author treeroot oy=ej+:
* @since 2006-2-2 #~r+Z[(,p
* @version 1.0 jS#YqVuN
*/ x|Ms2.!
public class SortUtil { YEB7X>p#
public final static int INSERT = 1; [_C([o'\KY
public final static int BUBBLE = 2; XWB#7;,R
public final static int SELECTION = 3; I3ugBLxVC3
public final static int SHELL = 4; Gy'/)}}Z
public final static int QUICK = 5; PFbkkQKsT
public final static int IMPROVED_QUICK = 6; 4Le{|B
public final static int MERGE = 7; 6>b#nFVJ
public final static int IMPROVED_MERGE = 8; JFkx=![
public final static int HEAP = 9; /1+jQS
zUWWXC%R
public static void sort(int[] data) { ,K.Wni#m
sort(data, IMPROVED_QUICK); *M$$%G(4
} MiMDEe%f%
private static String[] name={ Ud#xgs'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1b2xWzpG
}; MJn=
NMN&mJsmh
private static Sort[] impl=new Sort[]{ )<5hga][~a
new InsertSort(), 9G[t &r
new BubbleSort(), Ou|kb61zg
new SelectionSort(), x*:"G'zT
new ShellSort(), E8aD[j[w
new QuickSort(), @A-E
new ImprovedQuickSort(), z;&J9r$`
new MergeSort(), b>& 3XDz
new ImprovedMergeSort(), j:2*hF!E
new HeapSort() l% {<+N
}; d @b ]/
U@}P]'`'f
public static String toString(int algorithm){ `mS0]/AV/
return name[algorithm-1]; 7aHP;X~0
} ztC,[
1E$^ul-v
public static void sort(int[] data, int algorithm) { 8`|Z9umW*
impl[algorithm-1].sort(data); "Q[?W(SA
} gjB(Pwx
@M(+YCi:e@
public static interface Sort { ~yY5pnJ
public void sort(int[] data); =o[H2o y
} {t('`z
oe=W}y_k
public static void swap(int[] data, int i, int j) { suN}6CI
int temp = data; uLt31G()
data = data[j]; -]:1zU
data[j] = temp; r <2&_$|
} ]OC?g2&6
} O7f"8|=HX