[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; 5Ug.J{d
} df_hmkyj
int i1=l; X yi[z tN
int i2=mid+1; JvFd2@
for(int cur=l;cur<=r;cur++){ g?,\bmHE
if(i1==mid+1) 7b7~D +b
data[cur]=temp[i2++]; J})G l
else if(i2>r) f7B)iI!
data[cur]=temp[i1++]; =0,:w(Sb!
else if(temp[i1] data[cur]=temp[i1++]; v'`VyXetl
else hM~9p{O
data[cur]=temp[i2++]; 2pR+2p`
} `I|$U)'
} (V2~txMh
b77Iw%x7
} &NbhQY`k
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改进后的归并排序: ismx evD
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package org.rut.util.algorithm.support; 0XV8B
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import org.rut.util.algorithm.SortUtil; ~,[<R
``*iK
/** r;}%} /IX
* @author treeroot LIfQh
* @since 2006-2-2 @=CN#D12
* @version 1.0 = GUgb2TAT
*/ +]I7]
public class ImprovedMergeSort implements SortUtil.Sort { ;&mefaFlWp
_*\:UBZx6
private static final int THRESHOLD = 10; Fc{M N"
)C^ZzmB
/* s;!TB6b@
* (non-Javadoc) chw6_ctR>
* r8.R?5F@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U .?N
*/ MrXmX[1-
public void sort(int[] data) { _P6e%O8C#
int[] temp=new int[data.length]; 3[mVPV
mergeSort(data,temp,0,data.length-1); %JUD54bBt
} 5>z`==N)
_a?c,<A
private void mergeSort(int[] data, int[] temp, int l, int r) { \09m ?;^
int i, j, k; RsnKB/
int mid = (l + r) / 2; Nn/me
if (l == r) Ql`N)!
return; /)6+I(H
if ((mid - l) >= THRESHOLD) quXL'g
mergeSort(data, temp, l, mid); #mhR^60,
else 7lQ@I}i
insertSort(data, l, mid - l + 1); NDsF<2A4
if ((r - mid) > THRESHOLD) `M0m`Up
mergeSort(data, temp, mid + 1, r); ?` ?HqR0
else H@ab]&
insertSort(data, mid + 1, r - mid); |~)!8N.{
sw<GlF"
for (i = l; i <= mid; i++) { R_?Q`+X
temp = data; ]w7wwU^^*U
} R@ksYC3 F
for (j = 1; j <= r - mid; j++) { Mn`);[
temp[r - j + 1] = data[j + mid]; D^]g`V*N
} .|ZO2MCd
int a = temp[l]; IRWVoCc9/\
int b = temp[r]; p7H0|>
for (i = l, j = r, k = l; k <= r; k++) { g!/O)X3
if (a < b) { Ife/:v
data[k] = temp[i++]; >@Vap
a = temp; =i'APeNaQ
} else { 3a|I| NP
data[k] = temp[j--]; Sfl. &A(
b = temp[j]; be^+X[
} -zn$h$N4
} Z=c&</9e
} ),DLrGOl
~`Uil=
/** =;HC7TUM&
* @param data cp| q
* @param l /6Bm <k%
* @param i =r1-M.*a.M
*/ X ? eCK,
private void insertSort(int[] data, int start, int len) { |aD8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aK|],L
} =}F}XSvXH
} d8N{sT
} ,,}& Q%5
} l~mC$>f
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堆排序： $U*b;'o
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package org.rut.util.algorithm.support; ~<Eu @8+_
t=(d, kf
import org.rut.util.algorithm.SortUtil; CdZS"I
g \;,NW^
/** SN#Cnu}
* @author treeroot 8uh^%La8b.
* @since 2006-2-2 ,8Eg/
* @version 1.0 fYgEiap
*/ rt8"U<~
public class HeapSort implements SortUtil.Sort{ dbe\ YE
f;{K+\T
/* (non-Javadoc) 4:zyZu3fm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rq(9w*MW:
*/ bukdyo;l
public void sort(int[] data) { s:/Wz39SY3
MaxHeap h=new MaxHeap(); #[odjSb
h.init(data); $j(laD#AR
for(int i=0;i h.remove(); ]H {g/C{j
System.arraycopy(h.queue,1,data,0,data.length); QgF2f/;!
} #MyF 1E
8wH1x .
private static class MaxHeap{ }uFV\1
\281X
void init(int[] data){ kac-@
this.queue=new int[data.length+1]; (C9{|T+h
for(int i=0;i queue[++size]=data; :|&S7&l]
fixUp(size); ~pt#'65}:
} ]broU%#"
} F2)\%HR
TdKo"H*C
private int size=0; ^ }kqAmr
#Fkn-/nL
private int[] queue; G=(ja?d
tNf_,]u
public int get() { q;Rhx"x>T
return queue[1]; 1sNZl&
} ]K-B#D{P
7X{@$>+S
public void remove() { WupONrH1e
SortUtil.swap(queue,1,size--); $?*XPzZ
fixDown(1); Q$^)z_jai
} 49!(Sa_]j
file://fixdown i|!D
private void fixDown(int k) { ?{]"UnyVE*
int j; Yc`PK =!l
while ((j = k << 1) <= size) { INNTp[
if (j < size %26amp;%26amp; queue[j] j++; WQ1K8B4
if (queue[k]>queue[j]) file://不用交换 VJbn/5+P
break; O5v~wLx9e
SortUtil.swap(queue,j,k); FT;I|+H*P
k = j; os[i
} cv7.=*Kb;
} rD!UP1Nb
private void fixUp(int k) { _m@+d>f_
while (k > 1) { ALi3JU
int j = k >> 1; Iy;bzHXs
if (queue[j]>queue[k]) /4>|6l=
break; yD yMI
SortUtil.swap(queue,j,k); ' JAcN@q~z
k = j; 4<btWbk5u*
} Uqd2{fji=#
} ~Q2,~9Dkc
h[& \OD,P
} L"It0C
[P3 Z"&
} WNp-V02l
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SortUtil： ,|^ lqY
H=@S+4_bK
package org.rut.util.algorithm; S<o\.&J
\E8CC>Jd
import org.rut.util.algorithm.support.BubbleSort; S{S.H?{F
import org.rut.util.algorithm.support.HeapSort; 8,&pX ga
import org.rut.util.algorithm.support.ImprovedMergeSort; 1$v1:6
import org.rut.util.algorithm.support.ImprovedQuickSort; `ZPV.u/
import org.rut.util.algorithm.support.InsertSort; um=qT)/D
import org.rut.util.algorithm.support.MergeSort; /g\m7m)u
import org.rut.util.algorithm.support.QuickSort; !{S HlS
import org.rut.util.algorithm.support.SelectionSort; 'fka?lL
import org.rut.util.algorithm.support.ShellSort; 9RQw6rL
{SwvUWOf"
/** CuAA)Bj
* @author treeroot V\/5H~L
* @since 2006-2-2 yIf>8ed]#
* @version 1.0 J%1 2Ey@6
*/ i{MzQE+_^
public class SortUtil { pIgjo>K
public final static int INSERT = 1; `7jdV
public final static int BUBBLE = 2; D {N,7kT
public final static int SELECTION = 3; qM9> x:V
public final static int SHELL = 4; ]}9D*V
public final static int QUICK = 5; aMO+y91Y(
public final static int IMPROVED_QUICK = 6; - -ZSl
public final static int MERGE = 7; %&&;06GU}
public final static int IMPROVED_MERGE = 8; `y*o-St3
public final static int HEAP = 9; ZJ'FZ8Sx
_8s1Wh G
public static void sort(int[] data) { 8?[#\KgH1
sort(data, IMPROVED_QUICK); 6B&ERdoX
} G0Wv=tX|
private static String[] name={ K&;;{~md.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]GmXZi
}; j9O"!9$vQ
T?EFY}f
private static Sort[] impl=new Sort[]{ tS sDW!!M
new InsertSort(), #RTiWD[o
new BubbleSort(), _Bq[c
new SelectionSort(), Qe4"a*l-r
new ShellSort(), Wu U_RE
new QuickSort(), 4L/8Hj#g
new ImprovedQuickSort(), (E<QA
new MergeSort(), /u pDbP.O
new ImprovedMergeSort(), h%!N!\
new HeapSort() &DX
}; i4\m/&of3y
[8rl{~9E
public static String toString(int algorithm){ X.)D"+xnH
return name[algorithm-1]; tRmH6
} &BkdC,o
gB}UzEj^<
public static void sort(int[] data, int algorithm) { $LJCup,1"
impl[algorithm-1].sort(data); b:YyzOqEu
} #RVN7-x
vF.Ml
public static interface Sort { A9C
public void sort(int[] data); #]e](j>]
} O_[]+5.TX
$v~I n
public static void swap(int[] data, int i, int j) { #(o(p
int temp = data; [a\>"I\[
data = data[j]; RtScv
data[j] = temp; BV512+M
} b(?A^a
} +I_p\/J?w/