[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; d\tY-X3
} FV,aQ#
int i1=l; Dca,IaT'
int i2=mid+1; )|AxQPd
for(int cur=l;cur<=r;cur++){ -})zRL0!'
if(i1==mid+1) Z+[W@5q
data[cur]=temp[i2++]; M-q5Jfm
else if(i2>r) rw0s$~'
data[cur]=temp[i1++]; .j=mT[N,I
else if(temp[i1] data[cur]=temp[i1++]; %Y5F@=>&
else f&RjvVP?s
data[cur]=temp[i2++]; ^62I 5k/u
} <U\8&Uv>
} Q0,eE:
#JXXq%4 @
} UN:qE oS
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改进后的归并排序: D,(:))DmR
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package org.rut.util.algorithm.support; T7O)
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import org.rut.util.algorithm.SortUtil; jpTk@
oL<5hN*D
/** _#{qDG=
* @author treeroot ?C
* @since 2006-2-2 ?I"?J/zm
* @version 1.0 Mm9*$g!R
*/ XV`8Vb
public class ImprovedMergeSort implements SortUtil.Sort { m| 7v76(
2$A"{2G
private static final int THRESHOLD = 10; J |UFuD
S-</(,E}|
/* }m7$,'C%P
* (non-Javadoc) )ZFc5m^+u
* TqOH(={
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J(=y$8xje
*/ (N)>?r@n`
public void sort(int[] data) { _9Rj,
int[] temp=new int[data.length]; R\/tKZJjb
mergeSort(data,temp,0,data.length-1); _5$L`&
} #YK3Ogb,
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private void mergeSort(int[] data, int[] temp, int l, int r) { ziM@@$.F
int i, j, k; kmtkh"
int mid = (l + r) / 2; Z5EII[=$o
if (l == r) b@K1;A! S
return; }qZ^S9
if ((mid - l) >= THRESHOLD) GJHJ?^%
mergeSort(data, temp, l, mid); f;Ijl0d@
else p1mAoVxR
insertSort(data, l, mid - l + 1); && PZ;
if ((r - mid) > THRESHOLD) 7 `c!
mergeSort(data, temp, mid + 1, r); ]v]:8>N
else W ,v0~
insertSort(data, mid + 1, r - mid); wqJl[~O$
pEX Q
for (i = l; i <= mid; i++) { /WK1(B:
temp = data; P.1Z@HC
} V-X Ty iv
for (j = 1; j <= r - mid; j++) { pqju@FD*
temp[r - j + 1] = data[j + mid]; D>Rlm,U
} '- #QK'p
int a = temp[l]; G-sQL'L[U
int b = temp[r]; $'<$:;4b3
for (i = l, j = r, k = l; k <= r; k++) { EV-# E
if (a < b) { Bqb`WX[<`
data[k] = temp[i++]; 'R42N3|F
a = temp; zvdIwV&oT
} else { S1C#5=
data[k] = temp[j--]; Q]VG6x
b = temp[j]; i<=2 L?[.I
} 6KD-nr{S
} ZW@cw}
} Ol|fdQ
CLJn+Y2
/** 0V`~z-#
* @param data ZjrBOb
* @param l ej=}OH4
* @param i : Cli8#
*/ Wc;N;K52
private void insertSort(int[] data, int start, int len) { roe_H>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <yvo<R^30
} B[+b%a3
} c+8 Y|GB
} _x,(576~
} /ZH*t\
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堆排序： 6KPjZC<
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package org.rut.util.algorithm.support; &SPr#OkW
ilZ5a&X;
import org.rut.util.algorithm.SortUtil; !0):g/2h
&+H\ST(/
/** I'N!j>5oX
* @author treeroot BuxU+
* @since 2006-2-2 'AmA3x)9u
* @version 1.0 PGVP0H+RV
*/ U#XW}T=|
public class HeapSort implements SortUtil.Sort{ :/RvtmW
J{Ld)Q,^
/* (non-Javadoc) #'RfwldD9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )M(//jX
*/ C+mPl+}w
public void sort(int[] data) { D}-HWJQA3
MaxHeap h=new MaxHeap(); P*hYh5a
h.init(data); bQI.Qk
for(int i=0;i h.remove(); w6^TwjjZ$
System.arraycopy(h.queue,1,data,0,data.length); (Fq]y5
} f2v~: u
(#>Q#Izr
private static class MaxHeap{ ,jD-fL/:
.f!:@fX>=
void init(int[] data){ G%h+KTw
this.queue=new int[data.length+1]; 7;?7q
for(int i=0;i queue[++size]=data; f3:dn7
fixUp(size); RK)ikLgp
} u9]M3>
} %+UTs'I
ft iAty0n
private int size=0; ]I;owk,
o_[I#PT
private int[] queue; yBv4 xKMH
NL!xkcXO
public int get() { .v9i|E=<~
return queue[1]; BrZ17
} Q^?$2ck=
{?X +Yw
public void remove() { ;CV'
SortUtil.swap(queue,1,size--); Z 8GIZ
fixDown(1); g|4>S<uC
} ^?0?*
file://fixdown %(s2{$3
private void fixDown(int k) { ma"M?aM
int j; A v;NQt8ut
while ((j = k << 1) <= size) { dKw[#(m5v
if (j < size %26amp;%26amp; queue[j] j++; %uo#<Ny/ I
if (queue[k]>queue[j]) file://不用交换 c^5fhmlt
break; twaH20
SortUtil.swap(queue,j,k); 2&AX_#P
k = j; Q2Uk0:M
} <YCR^?hJSi
} i=fhK~Jd
private void fixUp(int k) { wGHVq fm5
while (k > 1) { ^a!oq~ZSy
int j = k >> 1; ?3v-ppw%
if (queue[j]>queue[k]) QPvWdjf#mM
break; )[yKO
SortUtil.swap(queue,j,k); &iy7It
k = j; 5D3&6DCH
} C?6q]k]r
} -:b<~S[
2t=&h|6EW
} 2{g&9
piIGSC
} (?.h<v1}
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SortUtil： " ;\EU4R
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package org.rut.util.algorithm; V{}TG]
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import org.rut.util.algorithm.support.BubbleSort; +5kQ;D{+
import org.rut.util.algorithm.support.HeapSort; *$mb~k^R
import org.rut.util.algorithm.support.ImprovedMergeSort; :U @L$
import org.rut.util.algorithm.support.ImprovedQuickSort; Jr>Nc}!U
import org.rut.util.algorithm.support.InsertSort; ^{E_fQJX
import org.rut.util.algorithm.support.MergeSort; f uH3C~u7<
import org.rut.util.algorithm.support.QuickSort; nGTqW/k[+s
import org.rut.util.algorithm.support.SelectionSort; Fg2/rC:_
import org.rut.util.algorithm.support.ShellSort; cn9=wm\\
E6-~
/** &G3$q,`H
* @author treeroot GB6(WAmr
* @since 2006-2-2 +>%AG&Pc
* @version 1.0 'sk M$jr
*/ ;b_<5S
public class SortUtil { vgr5j
public final static int INSERT = 1; \,I{*!hw
public final static int BUBBLE = 2; a3He-76
public final static int SELECTION = 3; Q"oJhxS
public final static int SHELL = 4; %r:4'$E7|
public final static int QUICK = 5; KkR.p,/
public final static int IMPROVED_QUICK = 6; Lk-h AN{[
public final static int MERGE = 7; }F3}"Ik'L
public final static int IMPROVED_MERGE = 8; +]Z*_?j9{
public final static int HEAP = 9; M IUB]
;;EFiaA
public static void sort(int[] data) { owO&[D/
sort(data, IMPROVED_QUICK); p\]rxtm
} 1}CJ&
private static String[] name={ SNHALF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P>|sCF
}; Y@b|/+
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private static Sort[] impl=new Sort[]{ #"o`'5
new InsertSort(), X8XE_VtP
new BubbleSort(), 2nSz0 .
new SelectionSort(), @,pn/[
new ShellSort(), H\|H]:CE
new QuickSort(), P;ZVv{mT
new ImprovedQuickSort(), Vz y )jf
new MergeSort(), 3tmS/tQp
new ImprovedMergeSort(), GbC JGqOR
new HeapSort() }5QUIK~NA
}; U(<~("ocN
xp"F)6
public static String toString(int algorithm){ os+]ct
return name[algorithm-1]; ,Fu[o6x<^
} w4UJXc
!nF.whq
public static void sort(int[] data, int algorithm) { pq]>Ep
impl[algorithm-1].sort(data); m2F+6G
} 2o0WS~}5
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public static interface Sort { X>MDX.Z
public void sort(int[] data); 70nBC
} 2j[;M-3
2(Nf$?U@0
public static void swap(int[] data, int i, int j) { ;^8X(R
int temp = data; d ?,wEfwp
data = data[j]; <!?ZH"F0
data[j] = temp; t&G #%
} 1kh()IrA
} ^pocbmg