[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; Vl5r~+$|
} ,cxqr3 o
int i1=l; Za@\=}Tt
int i2=mid+1; Oc)n,D)0
for(int cur=l;cur<=r;cur++){ :|j[{;asY
if(i1==mid+1) LK h=jB^bT
data[cur]=temp[i2++]; SgU@`Pb
else if(i2>r) #/qcp|m
data[cur]=temp[i1++]; maapX/J
else if(temp[i1] data[cur]=temp[i1++]; 0AnL]`"t.3
else e@hPb$7
data[cur]=temp[i2++]; A[P7hMn
} ~A0AB `7
} 2-F7tcya|
`q}D#0
} r6S
1RkN^FZOxq
改进后的归并排序: r`"_D%kc
29Uqdo
package org.rut.util.algorithm.support; {V[xBL <
HG7Qdw2+O
import org.rut.util.algorithm.SortUtil; oCo~,~kTR
'bfxQ76@sa
/** zfUDo`V~
* @author treeroot {tVA(&\<
* @since 2006-2-2 |1wZ`wGZ:L
* @version 1.0 m]DP{-s4
*/ q;SD+%tI
public class ImprovedMergeSort implements SortUtil.Sort { &tOo[U?
!+$qSD,%x
private static final int THRESHOLD = 10; i7H([b<_m
c:${qY:!
/* Wi$?k{C
* (non-Javadoc) 6UIS4_
* $Y/z+ea
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1=]#=)+
*/ P#pb48^-
public void sort(int[] data) { X}B]5
int[] temp=new int[data.length]; WDNj7
mergeSort(data,temp,0,data.length-1); 0,0WdJAe
} /:!sn-(
@!$xSH
private void mergeSort(int[] data, int[] temp, int l, int r) { []OS p&
int i, j, k; Va[&~lA)
int mid = (l + r) / 2; eI|FrBq%
if (l == r) ~U<j_j)z4.
return; pTAm}
if ((mid - l) >= THRESHOLD) X>dQK4!R
mergeSort(data, temp, l, mid); 65B&>`H~
else hj=n;,a9
insertSort(data, l, mid - l + 1); aaVq>$G3
if ((r - mid) > THRESHOLD) Tu:lIy~A
mergeSort(data, temp, mid + 1, r); s2sJJdN
else QP%AJ[3ea%
insertSort(data, mid + 1, r - mid); ]_ LAy
6heK8*.T
for (i = l; i <= mid; i++) { oKRI2ni$j9
temp = data; p7},ymQ|YQ
} iLdUus!
for (j = 1; j <= r - mid; j++) { "+Ks#
temp[r - j + 1] = data[j + mid]; B <Jxj
} ^g'uR@uU
int a = temp[l]; EhW@iYL
int b = temp[r]; o &b\bK%E
for (i = l, j = r, k = l; k <= r; k++) { uxW |&q
if (a < b) { p@$92> '
data[k] = temp[i++]; BAqwYWdS
a = temp; e{: -N
} else { RaiYq#X/
data[k] = temp[j--]; _J>Ik2EF
b = temp[j]; ~LH).\V
} 3&X5*-U
} \KEmfCx'n
} ziAn9/sT
kaZcYuT.9
/** CS^|="Zs
* @param data H8c -/
* @param l "t{D5{q|[k
* @param i B(@uJ^N
*/ Ud-c+, xX
private void insertSort(int[] data, int start, int len) { Ze`ms96j{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <t*3w
} eET1f8B=L
} u_=>r_J[b
} 7r3EMX\#Qm
} f+Bv8 g
}g.)%Bw!
堆排序： BBoVn^Z*R
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package org.rut.util.algorithm.support; l%cE o`U
Oi!uJofW
import org.rut.util.algorithm.SortUtil; _t7aOH
]T<RC\o
/** ]gb?3a}A
* @author treeroot F-?s8RD
* @since 2006-2-2 $8_b[~%2
* @version 1.0 kEdAt5/U{
*/ M-f; ,>
public class HeapSort implements SortUtil.Sort{ :jWQev"/
$T'lWD*
/* (non-Javadoc) ^^*dHWHn<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M[dJQ(
*/ ,3ivB8
public void sort(int[] data) { fH 5/
MaxHeap h=new MaxHeap(); XuW>GT/
h.init(data); 9r,7>#IF
for(int i=0;i h.remove(); f,Dj@?3+
System.arraycopy(h.queue,1,data,0,data.length); y}lqF8s
} , rc %#eF
ytGcigw(P
private static class MaxHeap{ uHO>FM,
U{.yX7
void init(int[] data){ t'Pn*
this.queue=new int[data.length+1]; +,ZQ( ZW
for(int i=0;i queue[++size]=data; "PY&NL?
fixUp(size); 7%^/Jm
} 6M_,4> -
} ^b`aO$
1lQO`CmR6M
private int size=0; Ut^ {4_EC
],ISWb
private int[] queue; 4Q(GX.5
r5aOQ
public int get() { Sy`7})[
return queue[1]; ]PjJy/vkjj
} iyf vcKO
PPSSar
public void remove() { e47N9&4
SortUtil.swap(queue,1,size--); pbePxOG
fixDown(1); J9*$@&@S
} 1|Z!8:&pj
file://fixdown S+&Bf ~~D
private void fixDown(int k) { +>S\.h s4
int j; zU,Qph ,<
while ((j = k << 1) <= size) { ]728x["(19
if (j < size %26amp;%26amp; queue[j] j++; i_6 Y6
if (queue[k]>queue[j]) file://不用交换 o79EDPX
break; W #kOcw
SortUtil.swap(queue,j,k); &;Jg2f%.
k = j; m<uBRI*I
} 3=~0m
} [GqQ6\
private void fixUp(int k) { 7[?{wbq
while (k > 1) { V1Opp8
int j = k >> 1; VwrHD$
if (queue[j]>queue[k]) Zw<\^1
break; I[v6Y^{q
SortUtil.swap(queue,j,k); >")<pUQ
k = j; Doj>Irj?7
} {gwJ>]z"e
} MYVgi{
TcM;6h`
} I c 2R\}q
. +
} )D"E]
sw^4h`^'
SortUtil： 6wY6*R
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package org.rut.util.algorithm; L|H:&|F
2jiH&'@
import org.rut.util.algorithm.support.BubbleSort; Qaeg3f3F3
import org.rut.util.algorithm.support.HeapSort; qPG>0 O
import org.rut.util.algorithm.support.ImprovedMergeSort; EAPjQA-B?
import org.rut.util.algorithm.support.ImprovedQuickSort; +#V.6i
import org.rut.util.algorithm.support.InsertSort; $zUHka
import org.rut.util.algorithm.support.MergeSort; ;S.o`z1GI
import org.rut.util.algorithm.support.QuickSort; vlS+UFH0
import org.rut.util.algorithm.support.SelectionSort; U8gf_R'
import org.rut.util.algorithm.support.ShellSort; ev"f@y9Do
p.|NZXk%%a
/** &;wNJ)Uc
* @author treeroot GI _.[
* @since 2006-2-2 Yfd0Np~
* @version 1.0 ]]^eIjg>a6
*/ I->BDNk
public class SortUtil { )~[rb<:)b
public final static int INSERT = 1; k ^(RSu<
public final static int BUBBLE = 2; si=m5$V
public final static int SELECTION = 3; )j/b`V6
public final static int SHELL = 4; dn}'B%
public final static int QUICK = 5; f~?4
public final static int IMPROVED_QUICK = 6; RR9G$}WS(
public final static int MERGE = 7; V krjs0
public final static int IMPROVED_MERGE = 8; #m;|QWW
public final static int HEAP = 9; .TpM3b#r
fx3oA}
public static void sort(int[] data) { >o,l/#z
sort(data, IMPROVED_QUICK); RHv|ijYy
} RoYwZX~
private static String[] name={ -4!S?rHwd+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zv&<r+<g
}; %&}gt+L(M
`m+o^!SGe
private static Sort[] impl=new Sort[]{ 9L7jYy=A#
new InsertSort(), ~;/}D0k$x
new BubbleSort(), @T@lHc
new SelectionSort(), G{]tB w
new ShellSort(), >\4"k4d}
new QuickSort(), sX[k}=HCK
new ImprovedQuickSort(), uG,*m'x']
new MergeSort(), caD)'FSES
new ImprovedMergeSort(), ;5!M+nk
new HeapSort() 9gQ ]!Oq
}; AXT(D@sI=
wzf%~ats
public static String toString(int algorithm){ \9N )71n(
return name[algorithm-1]; 4D=^24f`0
} 8d1r#sILI
NnTAKd8
public static void sort(int[] data, int algorithm) { /Xf_b.ZM&
impl[algorithm-1].sort(data); J>N^FR9
} HIsB)W&%@
Yc p<N>)
public static interface Sort { BRTCo,i
public void sort(int[] data); :F`"CR^,
} KybrSa
iTcq=
public static void swap(int[] data, int i, int j) { /7LAd_P6
int temp = data; RGe2N|
data = data[j]; xua E\*m
data[j] = temp; ioJ|-@!#o
} " 3tk"#.#
} SL5QhP