[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; X~T"n<:a>
} V \,Z (
int i1=l; bO^#RVH
int i2=mid+1; F\yxXOI
for(int cur=l;cur<=r;cur++){ |x3.r t
if(i1==mid+1) TLU^ad#9E
data[cur]=temp[i2++]; l}A8
else if(i2>r) 7loIX Qw
data[cur]=temp[i1++]; _pnJ/YE
else if(temp[i1] data[cur]=temp[i1++]; 2j+v\pjYC
else %qfql
data[cur]=temp[i2++]; JBo/<W#|
} ?kqo~twJ
} mzLDZ#=b
.^6"nnfA#
} QWp,(Mv:r
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改进后的归并排序: !~u;CMR
Mhc!v, D$
package org.rut.util.algorithm.support; - &Aw]+
id="\12Bw
import org.rut.util.algorithm.SortUtil; i Tg?JoE2
dh#4/Wa,
/** q{gt2OWqX
* @author treeroot po~V{>fUm
* @since 2006-2-2 NHG+l)y:
* @version 1.0 wg\*FfQn
*/ #Cks&[!c
public class ImprovedMergeSort implements SortUtil.Sort { -'*\KA@u
cLj@+?/
private static final int THRESHOLD = 10; 484lB}H
;+t~$5
/* >bWx!M]
* (non-Javadoc) &(UVS0=Dp,
* &rj3UF@hb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZDL=p
*/ P#H|at
public void sort(int[] data) { KLK '_)|CT
int[] temp=new int[data.length]; !{tkv4
mergeSort(data,temp,0,data.length-1); Xo]QV.n
} f|G,pDLx
iTJSW
private void mergeSort(int[] data, int[] temp, int l, int r) { *)+1BYMo
int i, j, k; N% /if
int mid = (l + r) / 2; 1sKKmtgH
if (l == r) |y=;#A
return; 22lC^)`TE
if ((mid - l) >= THRESHOLD) *<?or"P
mergeSort(data, temp, l, mid); SEsc"l8
else <;}jf*A
insertSort(data, l, mid - l + 1); ZS[(r-)$F
if ((r - mid) > THRESHOLD) yDh(4w-~gk
mergeSort(data, temp, mid + 1, r); +rse,b&U(
else |d}f\a`
insertSort(data, mid + 1, r - mid); mGR}hsQpn
Cj^:8 ?%
for (i = l; i <= mid; i++) { oo sbf#V
temp = data; DtkY;Yl
} s*$Re)}S
for (j = 1; j <= r - mid; j++) { am;)@<8~Q
temp[r - j + 1] = data[j + mid]; z*?-*6W
} C%P)_)--V
int a = temp[l]; "J:~Aa%_
int b = temp[r]; &<8Q/m]5
for (i = l, j = r, k = l; k <= r; k++) { <X9 T}g
if (a < b) { V?"X0>]0
data[k] = temp[i++]; *K#7,*Oz
a = temp; ?Ne@OMc
} else { bH+x `]{A
data[k] = temp[j--]; i oCoFj
b = temp[j]; *xm(K+j
} x;A"S
} ~<b/%l>h1
} lR]z8&
Fe8JsB-
/** ZI"L\q=|0#
* @param data S;a'@5
* @param l |GPR3%9
* @param i 2uonT,W
*/ {ctEjgiE
private void insertSort(int[] data, int start, int len) { ke.{wh\0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C9l5zb~D
} m\a_0!K
} "E`;8SZa
} / S
} K:PzR,nn
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堆排序： 4R_Vi[i
a& >(*PQ
package org.rut.util.algorithm.support; Nxk3uF^
:eaqUW!Y
import org.rut.util.algorithm.SortUtil; TBq;#+1W
a*4"j2j v
/** 5rG&Z5
* @author treeroot G9?6qb:
* @since 2006-2-2 en\shc{R]`
* @version 1.0 [hy:BV6H+
*/ y!6+jrI
public class HeapSort implements SortUtil.Sort{ !3~VoNh,
:uM2cc^
/* (non-Javadoc) `x;8,7W;B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @NBWNgBv
*/ /Mq]WXq[V
public void sort(int[] data) { KP)BD;
MaxHeap h=new MaxHeap(); )c9]}:W&
h.init(data); &cj/8A5-
for(int i=0;i h.remove(); -ya0!D
System.arraycopy(h.queue,1,data,0,data.length); bkmW[w:M
} At5:X*vD
d~L`*"/)[
private static class MaxHeap{ HV:mS*e
|7IlYy&:
void init(int[] data){ )k5lA=(Yr+
this.queue=new int[data.length+1]; e2#"o{+@
for(int i=0;i queue[++size]=data; w, 0tY=h6
fixUp(size); Q(lj&!?1k
} f.Y9gkt3d
} Peha{]U
1j*I`xZ
private int size=0; <j1l&H|ux,
k*bfq?E a
private int[] queue; '"}|'J
Y""-U3;T~
public int get() { DQg:W |A
return queue[1]; Z<a6U 3
} K?')#%Z/{#
T:0X-U
public void remove() { 7 q<UJIf
SortUtil.swap(queue,1,size--); bw#zMU^E
fixDown(1); RMB?H)p+
} v _Bu
file://fixdown S~vbISl
private void fixDown(int k) { qF6YH
int j; :oF\?e
while ((j = k << 1) <= size) { = PldXw0
if (j < size %26amp;%26amp; queue[j] j++; {! RW*B
if (queue[k]>queue[j]) file://不用交换 <[xxCW(2
break; G8`q-B}q
SortUtil.swap(queue,j,k); =SLP}bP{:
k = j; Ygn"7
} HZ=Dd4!
} 87EI<\mP
private void fixUp(int k) { wgSA6mQZ
while (k > 1) { j'-akXo<
int j = k >> 1; !U#kUj:4I
if (queue[j]>queue[k]) P,!W\N%3
break; IoNZ'g?d
SortUtil.swap(queue,j,k); b@N|sXt&C
k = j; .hgc1
} V_U$JKJ1=
} 9A\J*OU
BZ1@?3
} j._9;HifZ
~!]FF}6
} 6KhHS@Z
?7G?uk]3,@
SortUtil： g=pz&cz;>\
N;D(_:^
package org.rut.util.algorithm; -w 2!k
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import org.rut.util.algorithm.support.BubbleSort; =,-80WNsX
import org.rut.util.algorithm.support.HeapSort; /{7x|ay]
import org.rut.util.algorithm.support.ImprovedMergeSort; X=(8t2
import org.rut.util.algorithm.support.ImprovedQuickSort; FHM^x2
import org.rut.util.algorithm.support.InsertSort; \WouTn
import org.rut.util.algorithm.support.MergeSort; H1|X0a(j
import org.rut.util.algorithm.support.QuickSort; ?C.C?h6F5B
import org.rut.util.algorithm.support.SelectionSort; "eI-Y`O,
import org.rut.util.algorithm.support.ShellSort; 9R>A,x(
G#duZNBdc
/** P>L-,R(7e
* @author treeroot GfQMdLy\Z
* @since 2006-2-2 UOF5&>MLb
* @version 1.0 uVDB;6
*/ @)VJ,Ql$Y
public class SortUtil { XnWr~h{b
public final static int INSERT = 1; \EYhAx`2
public final static int BUBBLE = 2; jY>KF'y
public final static int SELECTION = 3; C_O7
public final static int SHELL = 4; ,0<|&D
public final static int QUICK = 5; 8XX,(k_b
public final static int IMPROVED_QUICK = 6; dSIMwu6u
public final static int MERGE = 7; y+Q!4A
public final static int IMPROVED_MERGE = 8; d7Q. 'cyQ
public final static int HEAP = 9; *KxV;H8/
]t0?,q.$7
public static void sort(int[] data) { u9mMkzgSkP
sort(data, IMPROVED_QUICK); `mw@"
} /J{P8=x}_:
private static String[] name={ plfz)x3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3m7$$N|
}; X,O&X
xZ`t~4qR
private static Sort[] impl=new Sort[]{ A!iH g__/t
new InsertSort(), ?{_dW=AQ1
new BubbleSort(), %PlPXoG=
new SelectionSort(), %<1fj#X8
new ShellSort(), (jY.S|%
new QuickSort(), An]*J|nFIY
new ImprovedQuickSort(), * +A!12s@
new MergeSort(), IA8kq =W
new ImprovedMergeSort(), a^Zn }R r
new HeapSort() 1%EY!14G+
}; &lI.N~Ao
|r0j>F
public static String toString(int algorithm){ j nI)n*
return name[algorithm-1]; L>@0Nne7
} /"iYEr%_
ynP^|Ou
public static void sort(int[] data, int algorithm) { J=4S\0Z*
impl[algorithm-1].sort(data); oVC~RKA*
} ;=h^"et
%K ]u"
public static interface Sort { OY"{XnPZ
public void sort(int[] data); 3%<ia$
} k(VA5upCs
CUxSmN2[
public static void swap(int[] data, int i, int j) { >-)i_C2
int temp = data; |:H[Y"$1;
data = data[j]; {_(;&\5
data[j] = temp; bGwLfU
} {'d?vm!r
} s/,St!A4!