[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; 'e/= !"T
} "vH>xBR[%
int i1=l; xw>\6VNt
int i2=mid+1; BA5b;+o-
for(int cur=l;cur<=r;cur++){ 2j*+^&M/
if(i1==mid+1) o'Uaz*-po
data[cur]=temp[i2++]; _3;vir%)
else if(i2>r) *VbB'u:
data[cur]=temp[i1++]; K5h2 ~
else if(temp[i1] data[cur]=temp[i1++]; aX)k(*|
else (i 3=XfZ!C
data[cur]=temp[i2++]; fcim4dfP
} ^|P/D
} -$x5[6bN
prdlV)LTpY
} ]]EOCGZ"
RF#S=X6
改进后的归并排序: T[?toqkD>z
P2j"L#%
package org.rut.util.algorithm.support; <{z*6FM!'
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import org.rut.util.algorithm.SortUtil; B@8M2Pl
%u)niY-g
/** cnm*&1EzV
* @author treeroot Y]9AC
* @since 2006-2-2 kn^?.^dVX
* @version 1.0 hB!>*AsG
*/ ,>AA2@6zMT
public class ImprovedMergeSort implements SortUtil.Sort { GY%2EM(
>" z$p@7
private static final int THRESHOLD = 10; :vsF4
dYEsSFB m
/* PQ#zF&gL9t
* (non-Javadoc) ~"Q24I
* zL%ruWNG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LGau!\
*/ )6t=Bel
public void sort(int[] data) { (59u<F
int[] temp=new int[data.length]; u>K(m))5W3
mergeSort(data,temp,0,data.length-1); Im<i.a <`
} f3p)Q<H>`(
++d%D9*V<
private void mergeSort(int[] data, int[] temp, int l, int r) { jNC@b>E?~
int i, j, k; ~8j4IO(
int mid = (l + r) / 2; |([|F|"
if (l == r) B5pWSS
return; 8+?|4'\`
if ((mid - l) >= THRESHOLD) >U.f`24
mergeSort(data, temp, l, mid); w]%|^:
else /'ukeK+'
insertSort(data, l, mid - l + 1); Jtv~n
if ((r - mid) > THRESHOLD) g]ct6-m
mergeSort(data, temp, mid + 1, r); q_R^Q>ZIe
else BM }{};p6
insertSort(data, mid + 1, r - mid); }OJ,<!v2pc
2`]`nTz,
for (i = l; i <= mid; i++) { ##+f/Fxym
temp = data; ag7(nn0!
} d,"6s=4(q
for (j = 1; j <= r - mid; j++) { ZJod=^T
temp[r - j + 1] = data[j + mid]; 4)DI0b"
} /Tc I
int a = temp[l]; |E(`9
int b = temp[r]; l_1y#B-k5
for (i = l, j = r, k = l; k <= r; k++) { PlX6,3F
if (a < b) { <*vWcCS1
data[k] = temp[i++]; ?kF_C,k/>N
a = temp; 0&W*U{0F\
} else { e*Y>+*2y
data[k] = temp[j--]; B< 6E'
b = temp[j]; s^QXCmb$8
} F.DRGi.i
} }[2|86,G;
} /&eF,4
:mI[fQ
/** 5>nbA8
* @param data `\]gNn'Q
* @param l zQt"i`{U
* @param i "lT>V)NB'
*/ "fq8)
private void insertSort(int[] data, int start, int len) { $7'K]'UJXO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n;w&}g
} !L({i')
} }23#z
} -!s?d5k")
} +J+[fbqX
4b}94e@(N
堆排序： S*D Bzl
$.g)%#h:
package org.rut.util.algorithm.support; / Ml d.
5{.g~3"
import org.rut.util.algorithm.SortUtil; iDdmr32E
h=7eOK]
/** `+c8;p'q
* @author treeroot _ft)e3Gf
* @since 2006-2-2 t#eTn";
* @version 1.0 mi>CHa+$
*/ sZ7RiH+I
public class HeapSort implements SortUtil.Sort{ /BaXWrd+
{<k}U;uiO
/* (non-Javadoc) p&O-]o8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [? 1m6u;
*/ _]/&NSk
public void sort(int[] data) { M6MtE_E
MaxHeap h=new MaxHeap(); f:K3 P[|
h.init(data); IW&.JNcN
for(int i=0;i h.remove(); "x"y3v'
System.arraycopy(h.queue,1,data,0,data.length); h{BO\^6x
} _ITA$#
9si,z
private static class MaxHeap{ pRTdP/(OQ
.o"FT~}z
void init(int[] data){ xtN=?WjVe0
this.queue=new int[data.length+1]; * SHQ[L4{
for(int i=0;i queue[++size]=data; B+pJWl8u
fixUp(size); Kd%>:E*
} D,<#pNO_
} `(dRb
}w%W A&"W
private int size=0; sP` k{xG
$mF(6<w
private int[] queue; F# a)"$j;
B*,Qw_3dG
public int get() { /`x)B(b
return queue[1]; L(ni6-
} Q=!f,
2TZ+R7B?
public void remove() { I,Z'ed..
SortUtil.swap(queue,1,size--); `JrvD
fixDown(1); ;xl_9Ht/
} noLb
file://fixdown !P"=57d}"l
private void fixDown(int k) { zm9_[0
int j; KJ]ejb$
while ((j = k << 1) <= size) { DP-euz
if (j < size %26amp;%26amp; queue[j] j++; *K}j>A
if (queue[k]>queue[j]) file://不用交换 L3 VyW8Y
break; HHMv%H]M
SortUtil.swap(queue,j,k); YYiT,Xp<A
k = j; P:3%#d~q
} ="Edt+a)t
} |AS`MsbI9
private void fixUp(int k) { `J}-U\4F{
while (k > 1) { w*3DIVlxL
int j = k >> 1; cz6\qSh\,
if (queue[j]>queue[k]) VdfV5"
break; pSml+A:
SortUtil.swap(queue,j,k); ap% Y}
k = j; r!,/~~mT
} $>M A
} 3~uWrZ.u
_hy<11S;
} O:>9yZhV
x.:k0;%Q
} Hswgv$n
9"RGf 1]
SortUtil： Jc74A=sT
B<A=U r
package org.rut.util.algorithm; |x ~<Dc>0*
i(l'f#
import org.rut.util.algorithm.support.BubbleSort; RgQ;fYS
import org.rut.util.algorithm.support.HeapSort; ktMUTL(B
import org.rut.util.algorithm.support.ImprovedMergeSort; J91O$szA
import org.rut.util.algorithm.support.ImprovedQuickSort; M^$liS.D
import org.rut.util.algorithm.support.InsertSort; w' gKE'c
import org.rut.util.algorithm.support.MergeSort; ~l=Jx*
import org.rut.util.algorithm.support.QuickSort; |##rs
import org.rut.util.algorithm.support.SelectionSort; &\_cU?0d
import org.rut.util.algorithm.support.ShellSort; ?7:?OX
8pQ:B/3=
/** #!n"),3
* @author treeroot +mqz)-x
* @since 2006-2-2 ^^{gn3xJ
* @version 1.0 xr<.r4
*/ K#LG7faj
public class SortUtil { RlH~<|XK
public final static int INSERT = 1; XJ.ERLR.
public final static int BUBBLE = 2; .bT|:Q~@{
public final static int SELECTION = 3; H|K}m,g
public final static int SHELL = 4; =%Yw;%0)Y
public final static int QUICK = 5; YhzDi>hob
public final static int IMPROVED_QUICK = 6; w=txSF&Qr
public final static int MERGE = 7; IRxFcLk
public final static int IMPROVED_MERGE = 8; 1Z+\>~8
public final static int HEAP = 9; =rrbS8To=
fcC?1M[BP~
public static void sort(int[] data) { "++q.y
sort(data, IMPROVED_QUICK); *k7vm%#ns
} ;J)8#|
private static String[] name={ 7rdPA9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mAFVjSa2
}; |4XR [eX
/h!Y/\kI
private static Sort[] impl=new Sort[]{ I}@m6D|\
new InsertSort(), )7j CEA03
new BubbleSort(), M-B-
new SelectionSort(), )^ky @V
new ShellSort(), Js7D>GWP!
new QuickSort(), ).Ei:/*j
new ImprovedQuickSort(), .LX8ko
new MergeSort(), %](H?'H
new ImprovedMergeSort(), _%`<V!RT\
new HeapSort() o=,q4;R'
}; 5>e3srKu
)/:&i<Q:
public static String toString(int algorithm){ oiS>:de%tc
return name[algorithm-1]; H3?HQ>&O7
} =R>%}5
bLHj<AX#>|
public static void sort(int[] data, int algorithm) { #{t?[JUn
impl[algorithm-1].sort(data); ;AwQpq>dy
} P9RIX;A=
;goR0PN
public static interface Sort { ?xTh}Sky
public void sort(int[] data); g7|$JevR0
} r:&"#F
77Fpb?0`
public static void swap(int[] data, int i, int j) { iSZiJ4AUq
int temp = data; $|2@of.
data = data[j]; "?lm`3W"
data[j] = temp; l u^fKQ
} 9J$8=UuxWG
} J01Y%W