[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; Jemb0Qv
} Z^?YTykH
int i1=l; >RL|W}tI4
int i2=mid+1; /U1 jCLR'
for(int cur=l;cur<=r;cur++){ xy.di9
if(i1==mid+1) ,TdL-a5
data[cur]=temp[i2++]; >8>}o4Q/X
else if(i2>r) \@eC^D2
data[cur]=temp[i1++]; o@!!I w
else if(temp[i1] data[cur]=temp[i1++]; ==W`qC4n?n
else tG"lI/
data[cur]=temp[i2++]; $S(q;Y
} ]L?DV3N
} :87HXz6]jS
d J;y>_
} aDreN*n
Dn9AOi!
改进后的归并排序: /[|ODfY
=nTNL.SX
package org.rut.util.algorithm.support; rcyq+wY #
fmv8)$W#U
import org.rut.util.algorithm.SortUtil; &8^1:CcE
SyWLPh
/** 4-dV%DgC
* @author treeroot {k#RWDespy
* @since 2006-2-2 oP0ZJK&;
* @version 1.0 -?K?P=B;X
*/ ?{bAyh/
public class ImprovedMergeSort implements SortUtil.Sort { MGGc
nOE 1bf^l
private static final int THRESHOLD = 10; kl90w
z/IZ ;K_e
/* "VfV;)]|w
* (non-Javadoc) EgY yvS)
* J BN_Upat
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a!?&8$^<
*/ }s7ibm'
public void sort(int[] data) { ncy?w e
int[] temp=new int[data.length]; aRh1Q=^@(4
mergeSort(data,temp,0,data.length-1); C*f3PB=H_
} CaV>\E)
+mqz)-x
private void mergeSort(int[] data, int[] temp, int l, int r) { [61T$.
int i, j, k; ,svj(HP$
int mid = (l + r) / 2; fsxZQ=-PW
if (l == r) =yZiBJ
return; U $ bLt
if ((mid - l) >= THRESHOLD) FKN!*}3
mergeSort(data, temp, l, mid); ;%V%6:5
else yN Bb(!u
insertSort(data, l, mid - l + 1); -UhGacw
if ((r - mid) > THRESHOLD) IRxFcLk
mergeSort(data, temp, mid + 1, r); 1Z+\>~8
else =rrbS8To=
insertSort(data, mid + 1, r - mid); fcC?1M[BP~
>[U.P)7;
for (i = l; i <= mid; i++) { ny,a5zEnF
temp = data; ^:yg,cS|Be
} pOz4>R
for (j = 1; j <= r - mid; j++) { *YI>Q@F9
temp[r - j + 1] = data[j + mid]; 9u->.O: p
} ;Npv 2yAab
int a = temp[l]; b3,&RUF
int b = temp[r]; o9Z!Z^
for (i = l, j = r, k = l; k <= r; k++) { f/&k$,w
if (a < b) { \~YyY'J
data[k] = temp[i++]; mu!hD^fw
a = temp; NSPa3NE
} else { b[MdA|C%j
data[k] = temp[j--]; hR]AUH
b = temp[j]; ~D9VjXfL)
} )= ,Lfj8x
} #O |Z\|n
} =:!$'q:
u7Xr!d+wR
/** #78P_{#!
* @param data s|1BqoE
* @param l 6,C,LT2^(
* @param i Nd"Rt
*/ gmY*}d` 'f
private void insertSort(int[] data, int start, int len) { U;_b4S:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,3zF_y(*Y
} A/xWe
} #0+`dI_5/
} PUdJ>U
} NB z3j
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堆排序： x*9CK8o=
dX58nJ4u
package org.rut.util.algorithm.support; AxN.k
;I#S m;
import org.rut.util.algorithm.SortUtil; {c3u!}mW
YJ&K0%R
/** bYKyR}e
* @author treeroot W:8*Z8?7
* @since 2006-2-2 {\?zqIM
* @version 1.0 #()u=)
*/ 4+V+SD
public class HeapSort implements SortUtil.Sort{ %>cl0W3x
=.]>,N`C
/* (non-Javadoc) ww]^H$In
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G2nL#l~@)
*/ B~_='0Gm[
public void sort(int[] data) { b83__i
MaxHeap h=new MaxHeap(); w :w
h.init(data); +!I7(gL
for(int i=0;i h.remove(); $hkMJ),T~
System.arraycopy(h.queue,1,data,0,data.length); ~)zoIM\
} A-GRuC
NdS6j'%B@7
private static class MaxHeap{ T/_JXK>W
Y!kz0([
void init(int[] data){ >t/P^fr_F
this.queue=new int[data.length+1]; DiB~Ovh|
for(int i=0;i queue[++size]=data; z_dorDF8`>
fixUp(size); s{-`y`JP
} 3q>6gaTv
} 5K;vdwSB
L29,Y=n@
private int size=0; Vs1j9P|G
hm%'k~
private int[] queue; 2>.2H
OZF^w[ `w
public int get() { zs@#.OEH
return queue[1]; 9q2 >_Mv
} P}%0YJ$6
J{gqm
public void remove() { Sd3KY9,
SortUtil.swap(queue,1,size--); 4DVkycM
fixDown(1); u#8J`%g
} b"ypS7 _
file://fixdown n.{+\M6k
private void fixDown(int k) { LvJ')HG
int j; D<rO:Er?*a
while ((j = k << 1) <= size) { >A$J5B>d
if (j < size %26amp;%26amp; queue[j] j++; Fr}e-a
if (queue[k]>queue[j]) file://不用交换 ,t+5(qi
break; S^@I4Z
SortUtil.swap(queue,j,k); mGjxc}
k = j; ~HwY?[}!m
} r@&d88U:
} $XqfwlUu/4
private void fixUp(int k) { @)8QxI^3[
while (k > 1) { LF'M!C9|
int j = k >> 1; yJaQcGxE"
if (queue[j]>queue[k]) wl{Fx+<^3
break; U}xQUFT|
SortUtil.swap(queue,j,k); }57wE$9K
k = j; e!wS"[,
} }}3*tn<6
} 7-M$c7S
Vrf+~KO7
} gY], (*v
kO:iA0KUX
} YC:>)
,`/J1(\nd
SortUtil： O[3AI^2
27-<q5q
package org.rut.util.algorithm; um@RaU
zaX!f~;"
import org.rut.util.algorithm.support.BubbleSort; "hU'o&
import org.rut.util.algorithm.support.HeapSort; GNXQD}L?b?
import org.rut.util.algorithm.support.ImprovedMergeSort; rl^_RI
import org.rut.util.algorithm.support.ImprovedQuickSort; XelY?Ph,,
import org.rut.util.algorithm.support.InsertSort; -{>Nrx|
import org.rut.util.algorithm.support.MergeSort; [=Wn7cr
import org.rut.util.algorithm.support.QuickSort; p6(n\egR
import org.rut.util.algorithm.support.SelectionSort; %Ke:%##Y
import org.rut.util.algorithm.support.ShellSort; L&qzX)
DRD%pm(
/** R1z\b~@"
* @author treeroot l1~>{:mq
* @since 2006-2-2 4WnB{9 i`I
* @version 1.0 YF=@nR$_~j
*/ "t+VF4r
public class SortUtil { ?op6_a-wm
public final static int INSERT = 1; hq.z:D
public final static int BUBBLE = 2; cLH|;
public final static int SELECTION = 3; Bv$;yR
public final static int SHELL = 4; tw8@&8"
public final static int QUICK = 5; yV:DR
public final static int IMPROVED_QUICK = 6; <CL0@?*i9
public final static int MERGE = 7; D"F5-s7
public final static int IMPROVED_MERGE = 8; jxL5L[
public final static int HEAP = 9; Ys10r-kDS
+XU*NAD,!
public static void sort(int[] data) { NYD#I{h
sort(data, IMPROVED_QUICK); VdR5ZP
} CTt3W>'=+
private static String[] name={ 06I'#:]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *1V}vJvi
}; fmH$1C<
!!ZNemXct$
private static Sort[] impl=new Sort[]{ KIdlndGs
new InsertSort(), 6Flc4L8JU
new BubbleSort(), h"KN)xi$
new SelectionSort(), '$~9~90?Z
new ShellSort(), 0-EhDGa]r
new QuickSort(), |b'fp1</
new ImprovedQuickSort(), + )?1F
new MergeSort(), GLA,,i'i9
new ImprovedMergeSort(), ([s}bD.9
new HeapSort() jRK<FK
}; WO*YBH@
\>w[#4`m
public static String toString(int algorithm){ 6 $%^
return name[algorithm-1]; F#@Mf?#2
} e9hT
Kz!-w
public static void sort(int[] data, int algorithm) { p^+k:E>U
impl[algorithm-1].sort(data); i/*&;
} 1i9}mzy%
-[~UX!XFM
public static interface Sort { .O'S@ %]
public void sort(int[] data); )cB00*/
} E/:<9xl
|sHIT<=m
public static void swap(int[] data, int i, int j) { .x$+7$G
int temp = data; >t u3m2
data = data[j]; J'y*;@4l^:
data[j] = temp; kRnh20I
} r4jW=?|
} =PyU9C-@