[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; I)[DTCJ~
} aCj&O:]=
int i1=l; :#ik. D
int i2=mid+1; nEy&>z
for(int cur=l;cur<=r;cur++){ ,HV(l+k {|
if(i1==mid+1) 5` ~JPt
data[cur]=temp[i2++]; IdYt\^@>
else if(i2>r) RJ&RTo
data[cur]=temp[i1++]; xn(kKB.
else if(temp[i1] data[cur]=temp[i1++]; At>DjKx]O
else vWv"
data[cur]=temp[i2++]; rfJz8uF%
} $6 9&O
} ,Vm < rK
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} h"Q8b}$^)
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改进后的归并排序: !hy-L_wL]
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package org.rut.util.algorithm.support; UnV.~u~
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import org.rut.util.algorithm.SortUtil; >Q;l(fdj
n'LrQU
/** Uz8ff
* @author treeroot #A/
* @since 2006-2-2 Rsk4L0
* @version 1.0 $GcqBg-Hi
*/ ]p GL`ge5
public class ImprovedMergeSort implements SortUtil.Sort { q`7PhA
:\c ^*K(9
private static final int THRESHOLD = 10; ie95rZp
a#k6&3m&
/* P|E| $)m
* (non-Javadoc) 8q!]y6
* 1(R}tRR7R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZvX*t)VjTz
*/ ECuH%b^,
public void sort(int[] data) { %)1?TU
int[] temp=new int[data.length]; i9|Sa6vuI
mergeSort(data,temp,0,data.length-1); fU}ub2_in
} |aS.a&vwR
9;u@q%;!k
private void mergeSort(int[] data, int[] temp, int l, int r) { ?e4YGOe.
int i, j, k; -@2iaQ(5a2
int mid = (l + r) / 2; ltSU fI
if (l == r) k]|~>9eY]
return; +@f26O7$*
if ((mid - l) >= THRESHOLD) lfgq=8d
mergeSort(data, temp, l, mid); /Cr%{'Pzk
else xLajso1g69
insertSort(data, l, mid - l + 1); :eCwY
if ((r - mid) > THRESHOLD) ET*SB
mergeSort(data, temp, mid + 1, r); Of#u
else ~,Ix0h+H+M
insertSort(data, mid + 1, r - mid); 4F:\-O
+3BN}
for (i = l; i <= mid; i++) { J*A,o~U|
temp = data; |YWD8 +
} C.-,^+t;g
for (j = 1; j <= r - mid; j++) { [|$h*YK
temp[r - j + 1] = data[j + mid]; {S)6;|ua'
} O=t_yy
int a = temp[l]; Ll't>)
int b = temp[r]; qInR1r<
for (i = l, j = r, k = l; k <= r; k++) { 9W5lSX#^;
if (a < b) { ;H*T^0
data[k] = temp[i++]; eo?bL$A[s
a = temp; ;igIZ$&
} else { c)85=T6*aA
data[k] = temp[j--]; ^{`exCwMx
b = temp[j]; .~;\eW[
} ?l{nk5,?-Y
} 5C]x!>kX
} $a]`nLUa
2F.;;Ab
/** ADzhNfS
* @param data 'IQ0{&EI
* @param l ]%H`_8<gc
* @param i q54]1TQ
*/ "(O>=F&
private void insertSort(int[] data, int start, int len) { /,yd+wcW#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mq.`X:e
} ZMlm)?m
} bAqA1y3=
} p]TAELy
} FW4<5~'
</zEg3F\
堆排序： ouQ T
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package org.rut.util.algorithm.support; ~36!?&eA8
g3y~bf
import org.rut.util.algorithm.SortUtil; {;1\+f
H7n>Vx:L-
/** Q)h(nbbVak
* @author treeroot C1)!f j=
* @since 2006-2-2 J ZS:MFA
* @version 1.0 kTgEd]^&D
*/ x 9fip-
public class HeapSort implements SortUtil.Sort{ ?fSG'\h>
S,UDezxg
/* (non-Javadoc) b4kgFA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jnov<+
*/ T8$y[W-c
public void sort(int[] data) { {EQOP]
MaxHeap h=new MaxHeap(); g) jYFfGfH
h.init(data); chX"O0?"
for(int i=0;i h.remove(); )ez9"# MH'
System.arraycopy(h.queue,1,data,0,data.length); 99QU3c<.
} 3=j"=-=
DvvK^+-~
private static class MaxHeap{ )y$(AJx$
3s#N2X;Bc
void init(int[] data){ y<Ot)fa$
this.queue=new int[data.length+1]; F]&*ow
for(int i=0;i queue[++size]=data; +mn[5Y}:
fixUp(size); q/,O\,
} H.MI5O(Q
} "chDg(jMZ
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private int size=0; ^1.By^ $
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private int[] queue; t{{QE:/
b\2 ds,
public int get() { %'pgGC"|
return queue[1]; I!K6o.|1
} 3!]rmZ-W
xA*<0O\V
public void remove() { > ~O.@|
SortUtil.swap(queue,1,size--); tWcHb #
fixDown(1); Q~Wqy~tS
} s$j,9uRr
file://fixdown InI$:kJ
private void fixDown(int k) { ww1[rCh\+
int j; :V||c5B+
while ((j = k << 1) <= size) { d2$IH#~9B
if (j < size %26amp;%26amp; queue[j] j++; OneY_<*a<
if (queue[k]>queue[j]) file://不用交换 D0f]$
break; J|73.&B
SortUtil.swap(queue,j,k); `ERz\`d~Y;
k = j; M_DwUS1?
} +NUG
} X&H"51
private void fixUp(int k) { 5{,<j\#L
while (k > 1) { 9pfIzs su3
int j = k >> 1; ECmW`#Otb)
if (queue[j]>queue[k]) Z%UP6%
break; ,ig/s2ZG6X
SortUtil.swap(queue,j,k); 8}:nGK|kx
k = j; FS.L\MjV]U
} 5b7RYV
} ]`WJOx4
1'8YkhQ2a
} Nh+H9
pA4xbr2
} %WS+(0*1
JBZ@'8eqi]
SortUtil： >vsqG=x
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package org.rut.util.algorithm; ]ZS OM\}
mt.))#1
import org.rut.util.algorithm.support.BubbleSort; Y'X%Aw;`
import org.rut.util.algorithm.support.HeapSort; HGg@ _9tW
import org.rut.util.algorithm.support.ImprovedMergeSort; )4;`^]F
import org.rut.util.algorithm.support.ImprovedQuickSort; 0"z9Q\{}
import org.rut.util.algorithm.support.InsertSort; ,V}WM%Km
import org.rut.util.algorithm.support.MergeSort; WNc0W>*NE1
import org.rut.util.algorithm.support.QuickSort; BZ^}J!Q'*
import org.rut.util.algorithm.support.SelectionSort; .=; ;
import org.rut.util.algorithm.support.ShellSort; BMf@M
d0> zS
/** #g!.T g'
* @author treeroot alb.g>LNPP
* @since 2006-2-2 TA~{1_l
* @version 1.0 `Q,H|hp;k;
*/ X}0cCdW
public class SortUtil { k9F=8q
public final static int INSERT = 1; wy2 D;;
public final static int BUBBLE = 2; /Z4et'Lo
public final static int SELECTION = 3; ?aMOZn?
public final static int SHELL = 4; 69.NPy@
public final static int QUICK = 5; TD_Oo-+\
public final static int IMPROVED_QUICK = 6; Cgc\ ah
public final static int MERGE = 7; w4Z'K&d=
public final static int IMPROVED_MERGE = 8; 1h5 Akq
public final static int HEAP = 9; Ek}A]zC
fF kj+
public static void sort(int[] data) { |Q>IrT
sort(data, IMPROVED_QUICK); >LuYHr
} syK^<xa
private static String[] name={ &kw@,];4Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?bu>r=oIO]
}; :Ux_qB
e(G|;a
private static Sort[] impl=new Sort[]{ fikkY=
new InsertSort(), Y nZiTe@
new BubbleSort(), n'w.; q
new SelectionSort(), |^H5^k "Bv
new ShellSort(), ;A!BVq
new QuickSort(), v*yuE5{
new ImprovedQuickSort(), cCc(fF*^
new MergeSort(), {]|J5Dgfe
new ImprovedMergeSort(), POR\e|hRT]
new HeapSort() e?f IXk~b
}; 7=, ;h
lb1Xsgm{
public static String toString(int algorithm){ s"?3]P
return name[algorithm-1]; 3oG,E;(
} {FTqu.
ws^ np
public static void sort(int[] data, int algorithm) { #cLBQJq
impl[algorithm-1].sort(data); 4ss4kp_>
} ;6hOx(>`=
>&#)Tqt!?
public static interface Sort { 4nz35BLr
public void sort(int[] data); da~],MN
} KCDE{za
&]-DqK7
public static void swap(int[] data, int i, int j) { FU<Jp3<%
int temp = data; f:P}*^ Gw
data = data[j]; Fea(zJ_
data[j] = temp; G9@0@2aY8
} ?b5^
} VOh4#%Vj