[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; 6zIK%<
} W[f%m0
int i1=l; ''($E/
int i2=mid+1; 9^7z"*@#
for(int cur=l;cur<=r;cur++){ yMEI^,0"
if(i1==mid+1) WCY5F
data[cur]=temp[i2++]; rn]F97v@]
else if(i2>r) ,]tEh:QC
data[cur]=temp[i1++]; !5 ?<QKOe
else if(temp[i1] data[cur]=temp[i1++]; 3N?"s1U
else RR2M+vQ
data[cur]=temp[i2++]; JmC2buO
} dTWcn7C
} ]?T,J+S
RdB,;Um9f
} fI,2l
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改进后的归并排序: yU>ucuF
d*x&Uh[K
package org.rut.util.algorithm.support; .qLXjU
d ATAH}r&
import org.rut.util.algorithm.SortUtil; [HhaBy9
@^%YOorr
/** g_@b- :$Yq
* @author treeroot h.\p+Qw.
* @since 2006-2-2 a4XK.[O
* @version 1.0 (coaGQ@d
*/ ?rY+,nQP
public class ImprovedMergeSort implements SortUtil.Sort { W/VEB3P>Z
`#:(F z
private static final int THRESHOLD = 10; tr58J%Mu
m=TZfa^r
/* Wo Z@
* (non-Javadoc) 5S[:;o
* {Y3:Y+2X3*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kZ;Y/DH
*/ cqaq~
public void sort(int[] data) { OepQ Z|2
int[] temp=new int[data.length]; <sn,X0W
mergeSort(data,temp,0,data.length-1); PZY6 I
} }zIWagC6
=3nA5'UZ
private void mergeSort(int[] data, int[] temp, int l, int r) { vR (nd
int i, j, k; vuZ'Wo:S{
int mid = (l + r) / 2; 7[0<,O6Q
if (l == r) ?w&?P}e +
return; MAp#1+k
if ((mid - l) >= THRESHOLD) ..x2
mergeSort(data, temp, l, mid); qT01@Bku
else Uu|2!}^T
insertSort(data, l, mid - l + 1); 4b+_|kYb
if ((r - mid) > THRESHOLD) VR'zm\< D
mergeSort(data, temp, mid + 1, r); >%5GMx>m
else lk[u
insertSort(data, mid + 1, r - mid); WpOH1[8v
g][n1$%
for (i = l; i <= mid; i++) { vsPIvW!V
temp = data; S_ra8HY8
} 5~$WSL?O)
for (j = 1; j <= r - mid; j++) { HIUP =/x
temp[r - j + 1] = data[j + mid]; zCv)%y
} (1[Z#y[
int a = temp[l]; <nK@+4EH"o
int b = temp[r]; h*Mt{A&'.&
for (i = l, j = r, k = l; k <= r; k++) { Ffd4c
if (a < b) { xVrLoAw
data[k] = temp[i++]; ]z2x`P^oI
a = temp; 2&=CC4<!d
} else { P~V ^Efz{
data[k] = temp[j--]; J\N&u#
b = temp[j]; &XW~l>!+
} 5=fS^]- F
} qW /&.
} {].]`#4Jx
bN|1%[7
/** D~TlG@Pq
* @param data UGvUU<N|N
* @param l ,Xg^rV~]
* @param i (,|eE)+
*/ -0I&dG-
private void insertSort(int[] data, int start, int len) { b!`6s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1@}<CWE9
} ftQ;$@
} Js.G hTs
} +HjSU2
} (!?%"e
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堆排序： i~3\dp
PP/#Z~.M
package org.rut.util.algorithm.support; hu7oJ H
2@Q5Ta#h
import org.rut.util.algorithm.SortUtil; +:Nz_l
|,({$TrF
/** 9{rE7OX*A
* @author treeroot F6\4[B
* @since 2006-2-2 7\X_%SM%
* @version 1.0 fF2]7:
*/ mRt/d
public class HeapSort implements SortUtil.Sort{ ` +)Bl%*
jkAru_C
/* (non-Javadoc) `=Rxnl,<U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r9<#R=r)}J
*/ A'"J'q*t
public void sort(int[] data) { ~Q]/=HK
MaxHeap h=new MaxHeap(); mE'HRv
h.init(data); q"WfKz!U
for(int i=0;i h.remove(); D( y c
System.arraycopy(h.queue,1,data,0,data.length); Ir(U7D
} R8YU#D (Q
}9N-2]
private static class MaxHeap{ W"\+jHF"
sxdDI?W4
void init(int[] data){ ma/<#l^}
this.queue=new int[data.length+1]; cY+n 6k5
for(int i=0;i queue[++size]=data; NCYOY
fixUp(size); bZZ_yc
} mnw(x#%P
} $7-S\sDr
|oQhtk8.
private int size=0; m 0Uu2Z4
JdUI:(
private int[] queue; 9H53H"5q
KM[&WT
public int get() { G @]n(\7Y
return queue[1]; 'R#MH
} oW>e.}d!
dnM.
public void remove() { ZTj!ti;5
SortUtil.swap(queue,1,size--); Ef3="}AI;
fixDown(1); e@5w?QzW
} ? :A%$T
file://fixdown Tm0\Oue0
private void fixDown(int k) { QtcYFf g
int j; DYrci?8Ith
while ((j = k << 1) <= size) { %`s1 Ocvp
if (j < size %26amp;%26amp; queue[j] j++; .&Sjazk0XO
if (queue[k]>queue[j]) file://不用交换 Zeq^dV5y77
break; ^* CKx
SortUtil.swap(queue,j,k); Tt_QAIl
k = j; ,>nf/c0.
} !<F5W<V
} \K lY8\c[
private void fixUp(int k) { ^rGuyW#
while (k > 1) { };'~@%U]/
int j = k >> 1; ^`RMf5i1m
if (queue[j]>queue[k]) '#yIcV$
break; 0Ag2zx
SortUtil.swap(queue,j,k); D+w?
k = j; vq\L9$WJ
} ?5EMDawt
} qZlL6
L"uidd0(g
} A6xN6{R!
61sEeM
} /N")uuv
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SortUtil： ?\<Kb|Q
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package org.rut.util.algorithm; C?<[oQb#
f'tQLF[r<
import org.rut.util.algorithm.support.BubbleSort; O7J V{'?
import org.rut.util.algorithm.support.HeapSort; a4]=4[(iu>
import org.rut.util.algorithm.support.ImprovedMergeSort; Gsy90
import org.rut.util.algorithm.support.ImprovedQuickSort; M=1~BZQ(Z
import org.rut.util.algorithm.support.InsertSort; E};1 H
import org.rut.util.algorithm.support.MergeSort; l{\k\Q!4
import org.rut.util.algorithm.support.QuickSort; %+(fdk-k+
import org.rut.util.algorithm.support.SelectionSort; L9l]0C37e
import org.rut.util.algorithm.support.ShellSort; 6kONuG7Yv
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/** }{[p<pU$C
* @author treeroot ++!0r['+>
* @since 2006-2-2 D+h`Z]"|
* @version 1.0 PpSQf14,
*/ R#ya9GN{
public class SortUtil { LRdV_O1e6M
public final static int INSERT = 1; \=(U tro
public final static int BUBBLE = 2; bE jQMlb
public final static int SELECTION = 3; bOr6"nn
public final static int SHELL = 4; =7S\-{
public final static int QUICK = 5; ;9)=~)
public final static int IMPROVED_QUICK = 6; yJ(ITJE_Z
public final static int MERGE = 7; mhNgXp)_56
public final static int IMPROVED_MERGE = 8; y#nyH0U
public final static int HEAP = 9; Nig)!4CG
<[17&F0
public static void sort(int[] data) { /g!X[rn7Q
sort(data, IMPROVED_QUICK); D6'-c#
} o KY0e&5
private static String[] name={ 2W/*1K}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l5U^lc
}; l 1BAW$
qIO)<5\[%d
private static Sort[] impl=new Sort[]{ ;F/s!bupCM
new InsertSort(), xoQqku"vn
new BubbleSort(), iH-(_$f;
new SelectionSort(), 4EhWK;ra
new ShellSort(), I=k`VId:
new QuickSort(), '=UsN_@
new ImprovedQuickSort(), n,p \~Tu,
new MergeSort(), U.ew6`'Te
new ImprovedMergeSort(), j$k/oQ
new HeapSort() %'9&JsO
}; tU-jtJ
A*W/Q<~I
public static String toString(int algorithm){ *[b~2
return name[algorithm-1]; \obM}caT
} zKf0 :X
zH *7!)8
public static void sort(int[] data, int algorithm) { *{=q:E$
impl[algorithm-1].sort(data); Emv9l~mIu
} raZ0B,;eFu
)+a]M1j
public static interface Sort { }5u;'>$
public void sort(int[] data); ?cD_\~
} GJBMaT
K3`48,`?wA
public static void swap(int[] data, int i, int j) { %:Zp7O2UB'
int temp = data; Lnl-han%
data = data[j]; {HP.HK
data[j] = temp; |(5|6r3
} +4k4z:<n
} M:%Ll3