[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; fP/;t61Z
} ;3\'}2^|l
int i1=l; n+1`y8dy
int i2=mid+1; )tx2lyY:
for(int cur=l;cur<=r;cur++){ 9hei8L:
if(i1==mid+1) d-jZ5nl(
data[cur]=temp[i2++]; "9#hk3*GqX
else if(i2>r) ) S-Fuq4i4
data[cur]=temp[i1++]; :0kKw=p1R
else if(temp[i1] data[cur]=temp[i1++]; 2Mu3]2>
else T[- %b9h>
data[cur]=temp[i2++]; ;qs^+
} (7C$'T-ZK
} @GWlo\rM6^
p+;;01Z+_
} 5Y>fVq{U?;
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改进后的归并排序: u/apnAW@M
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package org.rut.util.algorithm.support; a/n~#5-
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import org.rut.util.algorithm.SortUtil; ao"Z%#Jb~
pQoZDD@B$
/** RREl($$p
* @author treeroot E <N%
* @since 2006-2-2 T>irW(
* @version 1.0 ? CU;
*/ R(s[JH(&
public class ImprovedMergeSort implements SortUtil.Sort { H<"EE15
YbF}>1/"
private static final int THRESHOLD = 10; z+c'-!e/
n5Mhp:zc,
/* I9h{fB
* (non-Javadoc) qOAhBZ~
* 7#j9"*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,U~in)\ U
*/ %edTW[C`
public void sort(int[] data) { P! P` MX
int[] temp=new int[data.length]; DAy|'%rF1-
mergeSort(data,temp,0,data.length-1); Mehp]5*
} *i"Mu00b
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private void mergeSort(int[] data, int[] temp, int l, int r) { ]/|DCxQ
int i, j, k; #!>`$
int mid = (l + r) / 2; 0x# V
if (l == r) {KSy I#
return; 1ZXRH;J40
if ((mid - l) >= THRESHOLD) X=? \A{Y
mergeSort(data, temp, l, mid); | Pqs)Mb]
else :4)lmIu
insertSort(data, l, mid - l + 1); Li+|%a
if ((r - mid) > THRESHOLD) i "aQm
mergeSort(data, temp, mid + 1, r); .uB[zJc
else o\qeX|.70
insertSort(data, mid + 1, r - mid); 0R;`)V\^
rS0#]Gg
for (i = l; i <= mid; i++) { Hp@cBj_@P2
temp = data; ~ujg250.L
} X{iidTW`xv
for (j = 1; j <= r - mid; j++) { @ev^e!B
temp[r - j + 1] = data[j + mid]; PiLLUyQx
} a YY1*^
int a = temp[l]; u4xJ-Vu
int b = temp[r]; lUiO|
for (i = l, j = r, k = l; k <= r; k++) { `FK qVd
if (a < b) { 'i;ofJ[.c
data[k] = temp[i++]; o3`0x9{
a = temp; d>/4z#R}-
} else { _I%mY!x\`
data[k] = temp[j--]; #2+hu^Q-
b = temp[j]; Xy9'JVV6
} \5b<!Nl
} &<) _7?
} bBQHxH}vi
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/** V/)3d
* @param data /x/W>J2
* @param l T{ lm z<g
* @param i ^.M_1$-
*/ w_YY~Af
private void insertSort(int[] data, int start, int len) { nZ`=Up p)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z.W1Za
} zu1gP/
} !9^GkFR6n
} +EZr@
} we?t/YB=
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堆排序： JV!}"[
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package org.rut.util.algorithm.support; UHDcheeRD
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import org.rut.util.algorithm.SortUtil; B,Jn.YX
"H{#ib_c_
/** `~@}f"c`u
* @author treeroot }J=zO8OL
* @since 2006-2-2 }Ub "Vb
* @version 1.0 [{J1b
*/ &jDRRT3
public class HeapSort implements SortUtil.Sort{ tdC kvVE
XB%`5wwd
/* (non-Javadoc) * =O@D2g0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gKb5W094@
*/ =PoPp
public void sort(int[] data) { #elaz8 5
MaxHeap h=new MaxHeap(); \)PS&Y8n
h.init(data); U4Pk^[,p1G
for(int i=0;i h.remove(); $P&27
System.arraycopy(h.queue,1,data,0,data.length); b*a}~1
} m>b i$Y
w2tkJcQ3
private static class MaxHeap{ .sUL5`
=k+i5:@]
void init(int[] data){ H{;8i7%
this.queue=new int[data.length+1]; a[gN+DX%L
for(int i=0;i queue[++size]=data; |nO}YU\E
fixUp(size); Iq47^
} wSs78c=
} ;<`
3lNw*M|")
private int size=0; uMP&.Y(
;}k_2mr~
private int[] queue; X .S8vlb4z
zdDJcdbGd1
public int get() { 3K_!:[
return queue[1]; J~G"D-l<9/
} +z\O"zlj
g? \pH:|79
public void remove() { {c$%3iQq
SortUtil.swap(queue,1,size--); B Zw#ACU
fixDown(1); _d<\@Tkw
} #60<$HO:Z
file://fixdown 4>@-1nt}
private void fixDown(int k) { KL*UU,qU
int j; ,<-a 6
while ((j = k << 1) <= size) { &nZ.$UK<
if (j < size %26amp;%26amp; queue[j] j++; j8p'B-yS
if (queue[k]>queue[j]) file://不用交换 ?r~](l
break; k<S!|
SortUtil.swap(queue,j,k); 0 .p $q
k = j; ;d >
} kC[nY
} HjN )~<j
private void fixUp(int k) { 6_a.`ehtj<
while (k > 1) { 5(OF~mX#
int j = k >> 1; ~ .Eln+N
if (queue[j]>queue[k]) |m7`:~ow
break; v6?<)M%
SortUtil.swap(queue,j,k); ,K[B/tD{j
k = j; }~5xlg$B<<
} K#{E87G(
} %x7l`.)N
8JAT2a61ur
} Yui:=GgUrr
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} yc5n
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SortUtil： `+/[0B=.
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package org.rut.util.algorithm; )O%lh 8fI
Bj7\{x,?
import org.rut.util.algorithm.support.BubbleSort; -nT+!3A8
import org.rut.util.algorithm.support.HeapSort; 3/@'tLtN
import org.rut.util.algorithm.support.ImprovedMergeSort; )u&_}6z
import org.rut.util.algorithm.support.ImprovedQuickSort; I@q>ES!1H
import org.rut.util.algorithm.support.InsertSort; g^En6n)
import org.rut.util.algorithm.support.MergeSort; aa1XY&G"!
import org.rut.util.algorithm.support.QuickSort; +e"}"]n
import org.rut.util.algorithm.support.SelectionSort; 9Au+mIN
import org.rut.util.algorithm.support.ShellSort; i]LK,'
\9k{"4jX\
/** 4%j&]PASa1
* @author treeroot |qNrj~n@
* @since 2006-2-2 LGCL*Qbsg
* @version 1.0 _?_Svx2
*/ <FK7Rz:4T
public class SortUtil { 0+:.9*g=k
public final static int INSERT = 1; @]#+`pZ4A
public final static int BUBBLE = 2; x{*!"a>
public final static int SELECTION = 3; S8vmXlD
public final static int SHELL = 4; C127he
public final static int QUICK = 5; l7J_s?!j
public final static int IMPROVED_QUICK = 6; cCV"(Oo[H|
public final static int MERGE = 7; "x$S%:p
public final static int IMPROVED_MERGE = 8; |2 wff?
public final static int HEAP = 9; xD?{Hw>QT#
/9w}[y*E
public static void sort(int[] data) { |H_)u
sort(data, IMPROVED_QUICK); PewPl0
} X7c*T /
private static String[] name={ p go\(K0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8rp-XiW
}; = xX^
BK d(
private static Sort[] impl=new Sort[]{ \ bT]?.si
new InsertSort(), EJtU(HmW
new BubbleSort(), Z#MODf0H@
new SelectionSort(), 'HcDl@E
new ShellSort(), 5!ReW39c;
new QuickSort(), F5<{-{Ky
new ImprovedQuickSort(), u\.sS|$
new MergeSort(), f|^f^Hu:{
new ImprovedMergeSort(), }Rux<=cd|
new HeapSort() t2Y~MyT/
}; =;/h{ t
usTCn3u
public static String toString(int algorithm){ V!<#E)-?<
return name[algorithm-1]; l*:p==
} S8)awTA9
.RWBn~b#I
public static void sort(int[] data, int algorithm) { tl^[MLQa
impl[algorithm-1].sort(data); &s<
} [sk"2
!yI)3;$*
public static interface Sort { "DN`@
public void sort(int[] data); KnFbRhu[
} [1UqMkXtf
v/haUPWF\
public static void swap(int[] data, int i, int j) { YWZF*,4
int temp = data; `WW0~Tp3
data = data[j]; dE]"^O#Mc
data[j] = temp; ,]mwk~HeF
} J":9
} (<Xdj^v