[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; \9od*y
} b'R]DS{8
int i1=l; .W2w/RayC
int i2=mid+1; mL'A$BR`
for(int cur=l;cur<=r;cur++){ QyZ'%T5J
if(i1==mid+1) XH/!A`ZK
data[cur]=temp[i2++]; @ptrF pSL
else if(i2>r) [O!/hppN
data[cur]=temp[i1++]; ?6x&A t
else if(temp[i1] data[cur]=temp[i1++]; .RmoO\ ,Gm
else p<l+js(5|
data[cur]=temp[i2++]; !,5qAGi0
} '}(Fj2P79
} 0R(['s:3`
s- 0Xt<
} 9:Bn-3)
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改进后的归并排序: mc@Z+t'
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package org.rut.util.algorithm.support; 00y(E@~
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import org.rut.util.algorithm.SortUtil; 5bI4' ;
4 EA$<n(A-
/** 7*Zm{r@u
* @author treeroot `Jj b4]
* @since 2006-2-2 v{*2F
* @version 1.0 |Dq?<Ha
*/ fLSDt(c',
public class ImprovedMergeSort implements SortUtil.Sort { d& v 7l
J<Ki;_=I
private static final int THRESHOLD = 10; Zc&pJP+M'U
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/* z\K%
* (non-Javadoc) P#8lO%;
* 8+(wAbp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tgi7RAY
*/ 78?{;iNv
public void sort(int[] data) { L6!Hv{ijn
int[] temp=new int[data.length]; {cdrMP@""
mergeSort(data,temp,0,data.length-1); K!E\v4
} p_apVm\t_
>Apa^Bp
private void mergeSort(int[] data, int[] temp, int l, int r) { dI=&gz
int i, j, k; zqI|VH
int mid = (l + r) / 2; 7/BjWU5*
if (l == r) iF.f*3-NJB
return; o4z|XhLr
if ((mid - l) >= THRESHOLD) T`<Tj?:^&
mergeSort(data, temp, l, mid); "15frr?
else 92b}N|u
insertSort(data, l, mid - l + 1); JV/:QV
if ((r - mid) > THRESHOLD) ;9J6)zg !n
mergeSort(data, temp, mid + 1, r); 61HJ%
else 5,|{|/
insertSort(data, mid + 1, r - mid); H,j_2JOY=
]f wW dtz1
for (i = l; i <= mid; i++) { 8/ukzY1!
temp = data; KRhls"\1
} 2t{Tz}g*
for (j = 1; j <= r - mid; j++) { XZ8]se"C
temp[r - j + 1] = data[j + mid]; 6KN6SN$
} zd F;!
int a = temp[l]; &Fk|"f+
int b = temp[r]; X .K*</(g
for (i = l, j = r, k = l; k <= r; k++) { :inVwc
if (a < b) { |^F$Ta
data[k] = temp[i++]; j*1MnP3/8Y
a = temp; F)/4#[
} else { N1vA>(2A
data[k] = temp[j--]; <5ULu(b&$
b = temp[j]; 7v.O Lp
} j``Ku@/x0
} _Ii=3Qsf
} lC d\nE8G
*$1F|G
/** X>]<rEh
* @param data yRQNmR;Uy
* @param l 2:yXeSeA
* @param i X1V~.kvt)
*/ nKTi"2dm
private void insertSort(int[] data, int start, int len) { a785xSUV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v`6vc)>8
} !l6ht{
} Ru);wzky
} @bnw$U`+
} &{q'$oF
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堆排序： Ou f\%E<
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package org.rut.util.algorithm.support; C}9|e?R[Rz
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import org.rut.util.algorithm.SortUtil; ,hT**(W
xz+;1JAL3
/** {q~N$"#
* @author treeroot ~1S,[5u|s
* @since 2006-2-2 F hyY+{%
* @version 1.0 mFd|JbW
*/ 5,Co(K
public class HeapSort implements SortUtil.Sort{ jz\>VYi(7
,bB}lU)
/* (non-Javadoc) plNw>rFa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iI*qx+>f?
*/ 7|!Zx-}
public void sort(int[] data) { ZHj7^y@P
MaxHeap h=new MaxHeap(); t+0/$
h.init(data); '68#7Hs.
for(int i=0;i h.remove(); ;^)4u
System.arraycopy(h.queue,1,data,0,data.length); ;L%\[H>G
} =xb/zu(
IiX2O(*ZE
private static class MaxHeap{ `)BZk[64
9wdX#=I
void init(int[] data){ 0p\Kf(|E*6
this.queue=new int[data.length+1]; IZd~Am3f
for(int i=0;i queue[++size]=data; 1gLET.I:
fixUp(size); p DU+(A4>
} VArMFP)cz
} `+UBl\j
cf%2A1I2W
private int size=0; zYftgH_o
+)_DaL E
private int[] queue; :8?l=B9("g
CXi:?6OG
public int get() { f\Q_]%^W
return queue[1]; )|Ka'\xr
} kn&BGYt
N[yS heT
public void remove() { Qv8 =CnuOT
SortUtil.swap(queue,1,size--); W{ZJ^QAq/
fixDown(1); C2DAsSw
} GAh\6ul
file://fixdown H8Z|gq1r
private void fixDown(int k) { &nY#GHB
int j; O}6*9Xy
while ((j = k << 1) <= size) { ydE}.0zN
if (j < size %26amp;%26amp; queue[j] j++; @?t+O'&
if (queue[k]>queue[j]) file://不用交换 K>-01AGHL
break; 0rAuK7
SortUtil.swap(queue,j,k); Jl$ X3wE
k = j; N4WX}
} A 0;ng2&
} e_1L J
private void fixUp(int k) { xi)M8\K
while (k > 1) { 5<7sVd.
int j = k >> 1; @ xTVX'$
if (queue[j]>queue[k]) wV4MP1c$
break; Nfmr5MU_
SortUtil.swap(queue,j,k); TEC#owz
k = j; }rWg']
} j`MK\*qmz
} [Z!oVSCZD%
+9#qNkP
} "`* >co6r
#smfOGSd
} 58o&Dv6?
U.N&~S
SortUtil： Xl>ZnI];
# `@jVX0
package org.rut.util.algorithm; +.xK`_[M
Lu4>C2{
import org.rut.util.algorithm.support.BubbleSort; $3eoZ1q'U-
import org.rut.util.algorithm.support.HeapSort; VpED9l]y
import org.rut.util.algorithm.support.ImprovedMergeSort; c/Li,9cT'
import org.rut.util.algorithm.support.ImprovedQuickSort; Zk31|dL
import org.rut.util.algorithm.support.InsertSort; 1I8<6pi-
import org.rut.util.algorithm.support.MergeSort; WkPT6d
import org.rut.util.algorithm.support.QuickSort; ._&SS,I5VZ
import org.rut.util.algorithm.support.SelectionSort; ++=jh6
import org.rut.util.algorithm.support.ShellSort; Y&$puiH-j
x l=i_
/** Lo=n)cV1,
* @author treeroot Z55C4F5v
* @since 2006-2-2 ]?Q<lMG
* @version 1.0 >g{b'Xx
*/ /!*=*
public class SortUtil { 0sF|Y%N
public final static int INSERT = 1; gYmO4/c,
public final static int BUBBLE = 2; -Q%Pg<Q-#
public final static int SELECTION = 3; SES-a Mi3
public final static int SHELL = 4; Na+h+wD.D
public final static int QUICK = 5; !y$+RA7\
public final static int IMPROVED_QUICK = 6; "2PT]!
public final static int MERGE = 7; hsYv=Tw3C
public final static int IMPROVED_MERGE = 8; JX#0<U|L
public final static int HEAP = 9; .(yJ+NU
nB4+*=$E+-
public static void sort(int[] data) { #jPn7
sort(data, IMPROVED_QUICK); caV DV
} OLqynY
private static String[] name={ Fn{Pmo*rs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lZ) qV!<
}; U7-*]ik
X-psao0tI`
private static Sort[] impl=new Sort[]{ w`gT]Rn
new InsertSort(), 6Q]JY,+
new BubbleSort(), rshUF
new SelectionSort(), 6LabFX@{&
new ShellSort(), 7'|aEH
new QuickSort(), t8*NldC
new ImprovedQuickSort(), +/hd;s$x
new MergeSort(), y!_8m#n S
new ImprovedMergeSort(), 3kVN[0
new HeapSort() Au:R]7
}; zA/Fh(uX
$\PU Y8
public static String toString(int algorithm){ \(r$f!`
return name[algorithm-1]; ;{v2s;
} #J
*<X*)A{C
public static void sort(int[] data, int algorithm) { |n~,{=
impl[algorithm-1].sort(data); Mu6DTp~k
} -]QP#_
er3`ITp:dp
public static interface Sort { CW]Th-xc
public void sort(int[] data); @R(Op|9
} A>_,tt
Y)l=r^Ap>
public static void swap(int[] data, int i, int j) { J :KU~`r
int temp = data; q)J5tBfJ
data = data[j]; DZ9^>`*
data[j] = temp; x1Z*R+|>2
} amWKykVS5
} tjx|;m7