[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; Fq<;-
} A%G \ AT
int i1=l; /}Z0\,
int i2=mid+1; /{~cUB,Um
for(int cur=l;cur<=r;cur++){ (HUGgX"=
if(i1==mid+1) .7HnWKUV
data[cur]=temp[i2++]; n./onv
else if(i2>r) 96.A8o
data[cur]=temp[i1++]; jR^>xp;
else if(temp[i1] data[cur]=temp[i1++]; W1UG\d`2
else ^'|\8
data[cur]=temp[i2++]; kOfu7Zj
} *1L;%u| [
} VS#i>nlT
Y(D@B|"'m
} ]g/%w3G
7b2N'^z}
改进后的归并排序: S|8O$9{x9q
C<.t'|
package org.rut.util.algorithm.support; A|BvRZd
7]q$sQ
import org.rut.util.algorithm.SortUtil; =%:mZ@x'
Q-[^!RAK?
/** 1f 0"z1
* @author treeroot uW&P1'X
* @since 2006-2-2 }31z 35
* @version 1.0 `nO!_3
*/ }{^i*T5rl
public class ImprovedMergeSort implements SortUtil.Sort { iz`u@QKc%
-4JdKO
private static final int THRESHOLD = 10; `'u|4pRFs
N~-N Q
/* Zcg=a_
* (non-Javadoc) `A\ !Gn?
* #]ii/Et#x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JF>mybB
*/ BPnZ"w_
public void sort(int[] data) { n8zh;vuJ
int[] temp=new int[data.length]; A$RN7#
mergeSort(data,temp,0,data.length-1); dG|srgk+
} lqOv_q
zxCxGT\;
private void mergeSort(int[] data, int[] temp, int l, int r) { %Gn(b1X
int i, j, k; L4aT=of-
int mid = (l + r) / 2; l_LfVON
if (l == r) uU`zbh}]L.
return; Rww"Z=F
if ((mid - l) >= THRESHOLD) 5:f}bW*
mergeSort(data, temp, l, mid); C,Je>G
else Q]7Q4U
insertSort(data, l, mid - l + 1); ]?U:8%
if ((r - mid) > THRESHOLD) |B4dFI?
mergeSort(data, temp, mid + 1, r); @4_CR
else io:?JnQSA
insertSort(data, mid + 1, r - mid); Zx<s-J4o=w
knypSgk_
for (i = l; i <= mid; i++) { (@`+Le
temp = data; '<m[
} *Yov>lO
for (j = 1; j <= r - mid; j++) { n$}c+1
temp[r - j + 1] = data[j + mid]; lp?geav
} w IT`OT6Q
int a = temp[l]; Vm&fw".J
int b = temp[r]; 4 !~JNO
for (i = l, j = r, k = l; k <= r; k++) { +98~OInySZ
if (a < b) { hvGb9
data[k] = temp[i++]; dW!T.S
a = temp; l4u`R(!n5
} else { Kd;|Z
data[k] = temp[j--]; u9m"{KnV
b = temp[j]; Czb@:l%sc
} [m!\ZK
} Old5E&
} =g/K>B
2c!?!:s
/** Aye!@RjM8
* @param data 61T"K
* @param l 0_qqBL.4
* @param i ^#exsXy
*/ ,_YCl09p(
private void insertSort(int[] data, int start, int len) { EEn}Gw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sh}=#eb
} j4H,*fc
} 62%.ddM4
} fVo)# Bj
} &^qD<eZ!Eq
Tp[ub(/;7
堆排序： Hc^b}A y7
X,x{!
package org.rut.util.algorithm.support; ZxbWgM5rm
%S.R@C[3
import org.rut.util.algorithm.SortUtil; $+S'Boo
im%'S6_X4
/** $C(}
* @author treeroot z9&$Xao
* @since 2006-2-2 398}a!XM
* @version 1.0 qN}0$x>p
*/ WZ@nuK.39T
public class HeapSort implements SortUtil.Sort{ ~+QfP:G
e][U ;
/* (non-Javadoc) cL<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _hAp@? M
*/ vy1:>N?#5
public void sort(int[] data) { M<~z=B#
MaxHeap h=new MaxHeap(); MBXumc_g
h.init(data); ,V.X-`Y
for(int i=0;i h.remove(); >UZfi u
System.arraycopy(h.queue,1,data,0,data.length); V8`t7[r
} VCNg`6!x
+<|6y46
private static class MaxHeap{ !m'lOz
@lDoMm,m'
void init(int[] data){ wC`])z}bT
this.queue=new int[data.length+1]; m+"?;;s
for(int i=0;i queue[++size]=data; l`~*"4|/
fixUp(size); qx5.LiF
} B;2os^*
} 4}!riWR
oOmPbAY
private int size=0; q*mNVBy
#fRhG^QKp
private int[] queue; j0Kj>
|t!kD(~r
public int get() { Tc T%[h!
return queue[1]; +(`
} ]xCJ3.9
#dtYa
public void remove() { bezT\F/\
SortUtil.swap(queue,1,size--); zVd2kuI&?
fixDown(1); &BFW`5N
} |K,9EM3
file://fixdown XWf8ZZj
private void fixDown(int k) { bT|a]b:
int j; O1ofN#u
while ((j = k << 1) <= size) { +=)< Su.
if (j < size %26amp;%26amp; queue[j] j++; \=kH7 !
if (queue[k]>queue[j]) file://不用交换 gG>1
break; qb]n{b2
SortUtil.swap(queue,j,k); 4askQV &hj
k = j; hJ (Q^Z
} S1E=E5
} lQ<2Vw#Yl
private void fixUp(int k) { J{ P<^<m_
while (k > 1) { j#f+0
int j = k >> 1; +?w 7Nm`
if (queue[j]>queue[k]) m.iCGX
break; d(3F:dbk
SortUtil.swap(queue,j,k); {KxeH7S
k = j; 9TIyY`2!
} GvF8S MO[x
} Hzcy'
[ >O4hifq
} <Bn^+u\
n#uH^@#0
} 5|my}.TR
w},' 1
SortUtil： ig4wwd@|
I= G%r/3
package org.rut.util.algorithm; vIF=kKl9,
w,bILv)
import org.rut.util.algorithm.support.BubbleSort; X^r5su?
import org.rut.util.algorithm.support.HeapSort; iS&~oj_-%
import org.rut.util.algorithm.support.ImprovedMergeSort; 0#pjfc `:
import org.rut.util.algorithm.support.ImprovedQuickSort; !C *%,Ak
import org.rut.util.algorithm.support.InsertSort; g]EDL<b
import org.rut.util.algorithm.support.MergeSort; Gtd!Y x
import org.rut.util.algorithm.support.QuickSort; h!5^d!2,
import org.rut.util.algorithm.support.SelectionSort; gh=s#DQsFw
import org.rut.util.algorithm.support.ShellSort; gcqcY
J]UlCg
/** J~eY,n.6]
* @author treeroot {_0Efc=7
* @since 2006-2-2 8Y*SZTzV
* @version 1.0 t j&+HC
*/ qR4('
public class SortUtil { LTj;e[
public final static int INSERT = 1; }YW0?-G.$
public final static int BUBBLE = 2; )f1<-a"D|
public final static int SELECTION = 3; )^7Y^ue
public final static int SHELL = 4; F`SOF O
public final static int QUICK = 5; ML'4 2z Y
public final static int IMPROVED_QUICK = 6; vpcHJ^19
public final static int MERGE = 7; vDZhoD=VR
public final static int IMPROVED_MERGE = 8; P*oKcq1R
public final static int HEAP = 9; o90SXa&l/
s\i=-`
public static void sort(int[] data) { 06"p^#
sort(data, IMPROVED_QUICK); |-4C[5rM
} EF=.L{
private static String[] name={ x|i"x+o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ev* b
}; 'bGL@H
)W95)]
private static Sort[] impl=new Sort[]{ +5H9mk
new InsertSort(), \?c0XD
new BubbleSort(), "'h?O*V]u{
new SelectionSort(), RmxgCe(2a
new ShellSort(), 3p{N7/z(
new QuickSort(), CXks~b3SD
new ImprovedQuickSort(), <9 lZ%j;
new MergeSort(), @GqPU,RO
new ImprovedMergeSort(), 4b=hFwr[?
new HeapSort() fN~kdm.
}; kF.!U/C
F+,X%$A#?
public static String toString(int algorithm){ QLH&WF
return name[algorithm-1]; bhe~ekb
} *6^|i}
jIJVl \i]
public static void sort(int[] data, int algorithm) { =MDir$1Z
impl[algorithm-1].sort(data); [tsi8r=T
} RR!(,j^M
^I3cU'X
public static interface Sort { 6eE%x?#
public void sort(int[] data); J~KWn.
} ;l> xXSB7$
w]GoeIg({
public static void swap(int[] data, int i, int j) { GHj1G,L@\
int temp = data; #q`[(`Bx
data = data[j]; IGv_s+O-*
data[j] = temp; (Z5=GJM?$
} z_R^n#A~r
} C-d|;R}Ww