[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; 1h#e-Oyff
} L)X[$:
int i1=l; bPVQ-
int i2=mid+1; v/x~L$[
for(int cur=l;cur<=r;cur++){ R3hyz~\x&
if(i1==mid+1) <g1=jG:7k
data[cur]=temp[i2++]; &n~v;M
else if(i2>r) DdCNCXU
data[cur]=temp[i1++]; 8 t`lRWJ
else if(temp[i1] data[cur]=temp[i1++]; 7& 'p"hF
else 8 DPn5E#M1
data[cur]=temp[i2++]; HwZ"l31
} 1C+d&U
} Z7dyPR
U# U*^#
} OCEhwB0
U?=-V8#M|
改进后的归并排序: ;VS$xnZ
+d=w%r)
package org.rut.util.algorithm.support; fVz0H1\J&
8c%_R23
import org.rut.util.algorithm.SortUtil; ~_a$5Y
S#*aB2ZS
/** M`p[ Zq
* @author treeroot w\y)
* @since 2006-2-2 "Pa y2
* @version 1.0 b=XXp`h~a
*/ qaG8:
public class ImprovedMergeSort implements SortUtil.Sort { Y|cj&<o
gN.n_!
private static final int THRESHOLD = 10; _~bG[lX!
-8Hv3J'=
/* ffR<G&"n~b
* (non-Javadoc) z!aU85y
* nrKir
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +g&M@8XO&
*/ Vp1Ff
public void sort(int[] data) { s'/ZtH6>C
int[] temp=new int[data.length]; cYz|Ux
mergeSort(data,temp,0,data.length-1); yq12"Rs
} #Wq@j1?
[F+*e=wjN>
private void mergeSort(int[] data, int[] temp, int l, int r) { ={\9-JJhE
int i, j, k; 4}NCdGD
int mid = (l + r) / 2; Qrw:Bva)
if (l == r) MG vp6/Pd
return; f&!{o=
if ((mid - l) >= THRESHOLD) |:pBk:
mergeSort(data, temp, l, mid); <&l@ ):a
else Y_/w}HB
insertSort(data, l, mid - l + 1); &M7AM"9
if ((r - mid) > THRESHOLD) v)JS4KS
mergeSort(data, temp, mid + 1, r); !q 9PO
else RV),E:?
insertSort(data, mid + 1, r - mid); xwojjiV
oZ>2Tt%
for (i = l; i <= mid; i++) { Rw^X5ByJE
temp = data; (} wMU]!_
} Lum5Va%0
for (j = 1; j <= r - mid; j++) { `5SQ4
temp[r - j + 1] = data[j + mid]; HL%|DCo
} > 1=].
int a = temp[l]; !+(H(,gI
int b = temp[r]; =-]NAj\
for (i = l, j = r, k = l; k <= r; k++) { ('+C $
if (a < b) { Q2"K!u]
data[k] = temp[i++]; S3^(L
a = temp; |LirjC4
} else { <=%=,Yk
data[k] = temp[j--]; ?%*p!m
b = temp[j]; :kvQ3E0
} V^< Zs//7
} pYh\l.@qf
} yM*_"z!L
Rbcu5.6
/** H@'u$qr$:
* @param data ~:99 )AOM
* @param l Bh;N:{&^Eu
* @param i O+t'E9Fa
*/ {Rq5=/b
private void insertSort(int[] data, int start, int len) { G%>M@nYUE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |xrnLdng0R
} \lF-]vz*
} Bw>)gSB5$k
} /L=Y8tDt
} as"@E>a
@b{$s
堆排序： wZt2%+$6m
\hP.Q;"MtO
package org.rut.util.algorithm.support; |a=7P
{T3~js
import org.rut.util.algorithm.SortUtil; 7GRPPh<4
a}[rk*QmZ
/** M/kBAxNIC|
* @author treeroot ?~<NyJHN%
* @since 2006-2-2 ]{18-=
* @version 1.0 x!fgZr{
*/ Esf\Bo"
public class HeapSort implements SortUtil.Sort{ T=':$(t
gw<udhk
/* (non-Javadoc) P>'29$1'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nZ[`Yrq)0
*/ 4xgfm.9I^
public void sort(int[] data) { vw :&c.zd
MaxHeap h=new MaxHeap(); !ezy v`
h.init(data); e?:1wU
for(int i=0;i h.remove(); KgXu x-q
System.arraycopy(h.queue,1,data,0,data.length); k0,]2R
} "Iacs s0;
\pXo~;E\
private static class MaxHeap{ *mn"GK6
7=a e^GKo
void init(int[] data){ .:=5|0m
this.queue=new int[data.length+1]; rN'}IS@5
for(int i=0;i queue[++size]=data; \{={{O
fixUp(size); w{ Pl
} av~kF
} <(l`zLf4p
$`<-;kI
private int size=0; !*o{xq
{}P~nP
private int[] queue; w`[`:H_z
5Q,j+
public int get() { 9>;CvR
return queue[1]; czH# ~
} ~'N+O K
T1;>qgp4b
public void remove() { u56F;y
SortUtil.swap(queue,1,size--); 1i;Cw/mr
fixDown(1); ptlag&Z
} yh{U!hG
file://fixdown AsR}qqG
private void fixDown(int k) { Wz;@Rl|F
int j; y 7z)lBy\
while ((j = k << 1) <= size) { %`lLX/4~
if (j < size %26amp;%26amp; queue[j] j++; >]kZ2gVt
if (queue[k]>queue[j]) file://不用交换 (V0KmNCW`
break; t:n$9WB)
SortUtil.swap(queue,j,k); ,fvhP $n
k = j; s1p<F,
} n>xuef
} iB+ _+A
private void fixUp(int k) { R| XD#bG
while (k > 1) { -`5L;cxwk4
int j = k >> 1; XI"IEwB
if (queue[j]>queue[k]) 4GS:kfti
break; I>lblI$7
SortUtil.swap(queue,j,k); zICrp
k = j; zb.sh
} S 9;FD3
} Bnw^W_
<DhuY/o
} 2\CZ"a#[
]PB95%
} 7Ac.^rv5
60l!3o"p!
SortUtil： MHS|gR.c
dRUmC H
package org.rut.util.algorithm; HahA} Q
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import org.rut.util.algorithm.support.BubbleSort; P>Ru
import org.rut.util.algorithm.support.HeapSort; 0Z{u;FI
import org.rut.util.algorithm.support.ImprovedMergeSort; DPfN*a-P(
import org.rut.util.algorithm.support.ImprovedQuickSort; ,nJCqX~/G
import org.rut.util.algorithm.support.InsertSort; EjP)e;
import org.rut.util.algorithm.support.MergeSort; .2y @@g
import org.rut.util.algorithm.support.QuickSort; 9H2mA$2jnE
import org.rut.util.algorithm.support.SelectionSort; E,QD6<?[
import org.rut.util.algorithm.support.ShellSort; AR c
%!R\-Vej
/** % -.V6}V
* @author treeroot _~;K]
* @since 2006-2-2 -i]2b
* @version 1.0 ?8)k6:
*/ uM9Gj@_
public class SortUtil { [K1z/ea)V
public final static int INSERT = 1; /as+ TU`A
public final static int BUBBLE = 2; rd,!-w5
public final static int SELECTION = 3; )"%J~:`h}
public final static int SHELL = 4; **c"}S6:mC
public final static int QUICK = 5; dJ~Occ1~r
public final static int IMPROVED_QUICK = 6; :wfN+g=
public final static int MERGE = 7; 4wx{i6
public final static int IMPROVED_MERGE = 8; OX[r\
public final static int HEAP = 9; Ct$\!|aR
D8`SI21P
public static void sort(int[] data) { Nj +^;Y
sort(data, IMPROVED_QUICK); DIgur}q)@
} A(z m
private static String[] name={ W>u{JgY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sHQO*[[
}; 9TEAM<b;
J\Tu=f)
private static Sort[] impl=new Sort[]{ zek>]l`!
new InsertSort(), 4}0Ry\ 6
new BubbleSort(), %0vWyU:K9
new SelectionSort(), ~SI G0U8
new ShellSort(), ;8b!T -K
new QuickSort(), +kq+x6&
new ImprovedQuickSort(), `2y?(BJp
new MergeSort(), ~6{U^3
new ImprovedMergeSort(), gCbS$Pw
new HeapSort() sIRfC< /P
}; )GOio+{H
=+H,}
public static String toString(int algorithm){ QFFFxaeJg
return name[algorithm-1]; ^ZFK:|Ju
} f,Am;:\|
!1l~'/r
public static void sort(int[] data, int algorithm) { gO/\Yi
impl[algorithm-1].sort(data); NzS`s,N4/0
} uW4.Q_O!H
0XI6gPo%
public static interface Sort { AmrVxn4
public void sort(int[] data); H% FP!03
} 9{Igw"9ck
3il$V78|
public static void swap(int[] data, int i, int j) { #Fkp6`Q$x
int temp = data; <&tdyAT?&
data = data[j]; E0.o/3Gw6
data[j] = temp; -*qoF(/U
} <KX+j,4
} Nl^uA