[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; N#Y|MfLc
} =5v=<, ]
int i1=l; \69h>h
int i2=mid+1; nH=8I~jp
for(int cur=l;cur<=r;cur++){ mz'r<v2Tc
if(i1==mid+1) Ac2,A>
data[cur]=temp[i2++]; ,@#))2<RK
else if(i2>r) Fzc8)*w
data[cur]=temp[i1++]; (1pR=
else if(temp[i1] data[cur]=temp[i1++]; ,_N+t:*#0
else nN]GO}
data[cur]=temp[i2++]; [K=M;$iQ
} '=Z]mi/aw
} .EF(<JC?
uSl&d
} e@ mjh,
~fV\ X*
改进后的归并排序: ,DZoE~
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package org.rut.util.algorithm.support; g"dq;H
]+ KN9
import org.rut.util.algorithm.SortUtil; 0'3f^Ajf
P5K=S.g
/** )9]DJ!]&Q"
* @author treeroot l 10p'9n
* @since 2006-2-2 d5z=fH9
* @version 1.0 i0TbsoKh:
*/ VK]cZ%)
public class ImprovedMergeSort implements SortUtil.Sort { l+vD`aJ3
+QZ}c@'r
private static final int THRESHOLD = 10; d:X@zUR*)
yd|roG/
/* Mjon++>Z
* (non-Javadoc) <3)k M&.B
* %A$5mi^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +v.<Fw2k#
*/ p=jpk@RX
public void sort(int[] data) { li37*
int[] temp=new int[data.length]; N8E
mergeSort(data,temp,0,data.length-1); ]wZlJK`K
} cp)BPg
CK"OHjR
private void mergeSort(int[] data, int[] temp, int l, int r) { ;H4s[#K
int i, j, k; GiK4LJ~cH)
int mid = (l + r) / 2; VrIR!9%:
if (l == r) N;q)[Dr
return; DP8%/CV!*
if ((mid - l) >= THRESHOLD) ogvB{R
mergeSort(data, temp, l, mid); YctWSfh
else W5Uw=!LdEY
insertSort(data, l, mid - l + 1); S0' ACt`
if ((r - mid) > THRESHOLD) Q3I^(Ll"L
mergeSort(data, temp, mid + 1, r); S?[@/35)
else @Cml^v@`L
insertSort(data, mid + 1, r - mid); F;L8FL-
Fy$f`w_H@
for (i = l; i <= mid; i++) { 9Wv}g"KY0
temp = data; {ldt/dl~
} ^m/7TwD
for (j = 1; j <= r - mid; j++) { agkGUK/
temp[r - j + 1] = data[j + mid]; QnA~,z/.w
} .>a [
int a = temp[l]; x']Fe7nv
int b = temp[r]; Rc vp@
for (i = l, j = r, k = l; k <= r; k++) { ka_(8
if (a < b) { hS1I ;*t
data[k] = temp[i++]; q-s(2C
a = temp; i IM\_<?
} else { ALQ-aXJ
data[k] = temp[j--]; {2)).g
b = temp[j]; Xp.$FJ1)
} hv`I`[/J
} Ms#rvn!J
} EsS$th)d
61w ({F
/** n?778Wo}
* @param data M-Ek(K3SRf
* @param l q BIekQT
* @param i PthgxB^
*/ +e,c'.
private void insertSort(int[] data, int start, int len) { )$h!lAo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #aQQd8
} s"XwO8yhM
} {_mVfFG
} UwxszEHC
} wX5q=I
dVUe!S`
堆排序： -p?&vQDo`
(g*j+i
package org.rut.util.algorithm.support; ;80^ GDk~S
0'HQ=pP
import org.rut.util.algorithm.SortUtil; %E5b}E#
qX*xQA|ak,
/** sopf-g:
* @author treeroot Mg2e0}{
* @since 2006-2-2 Ia<V\$#
* @version 1.0 X5\xq+Ih
*/ /z_]7]
public class HeapSort implements SortUtil.Sort{ x5CMP%}d
2n$Wey[
/* (non-Javadoc) M\/hK2J# #
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eXMIRus(
*/ WQ}wQ:]
public void sort(int[] data) { qY$ [2]
MaxHeap h=new MaxHeap(); d!UxFY@
h.init(data); }lDX3h
for(int i=0;i h.remove(); _-lE$ O
System.arraycopy(h.queue,1,data,0,data.length); |g.CS$'#Nt
} 3C<G8*4);/
"V(P)_
private static class MaxHeap{ K2yu}F^}
,:e~aG,B
void init(int[] data){ 1f<R,>
this.queue=new int[data.length+1]; aopZ-^
for(int i=0;i queue[++size]=data; MqB@}!
fixUp(size); ^?Mp(o
} D*ZjoU
} 0F@~[W|2
F_(~b
private int size=0; QM#Vl19>j(
/wLGf]0
private int[] queue; xa@$cxt
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public int get() { DH yv^
return queue[1]; mmbe.$73
} h@Ea5x
NX,m6u
public void remove() { ?W{+[OXs
SortUtil.swap(queue,1,size--); XZ~kXE;B(
fixDown(1); XQ]vJQYIR
} 9gcW;
file://fixdown hNM8H
private void fixDown(int k) { Tj#S')s8
int j; ()IZ7#kL?
while ((j = k << 1) <= size) { ea"X$<s>-
if (j < size %26amp;%26amp; queue[j] j++; /iFn=pk1?
if (queue[k]>queue[j]) file://不用交换 &liON1GLM
break; LDc EjFK(
SortUtil.swap(queue,j,k); 5[Vr {^)
k = j; oI{.{]
} x<gmDy*
} <E4(KE
private void fixUp(int k) { ~^1y(-cw
while (k > 1) { \{@m
int j = k >> 1; Eo6N'h>h
if (queue[j]>queue[k]) |@u2/U9
break; {&n- @$?
SortUtil.swap(queue,j,k); F<,pAxl~@
k = j; x(TF4W=j
} k9}8xpH
} ;_I>`h"r
(N9-YP?qm
} CW+kKN
.D 4G;=Q
} <R]m(
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SortUtil： <?KPyg2
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package org.rut.util.algorithm; yjjq&Cn
2T&MVl!%
import org.rut.util.algorithm.support.BubbleSort; :hZM$4
import org.rut.util.algorithm.support.HeapSort; BYq80Vk%@
import org.rut.util.algorithm.support.ImprovedMergeSort; }=/zG!+
import org.rut.util.algorithm.support.ImprovedQuickSort; y(J~:"}7)
import org.rut.util.algorithm.support.InsertSort; V'&;r'#O
import org.rut.util.algorithm.support.MergeSort; YCbvCw$Ob
import org.rut.util.algorithm.support.QuickSort; Y)1/fEM
import org.rut.util.algorithm.support.SelectionSort; ^cYB.oeu
import org.rut.util.algorithm.support.ShellSort; ;;,7Jon2
)q=F_:$
/** m.K cTM%j
* @author treeroot )dkU4]
* @since 2006-2-2 +l7)7qKx
* @version 1.0 u"HGT=Nl
*/ PR@6=[|d
public class SortUtil { h^\vk!Q-d
public final static int INSERT = 1; [./FzlAs
public final static int BUBBLE = 2; 1CB&z@
public final static int SELECTION = 3; J#(AX6
public final static int SHELL = 4; `MU~N_
public final static int QUICK = 5; 'zI(OnIS
public final static int IMPROVED_QUICK = 6; pa!BJ]~
public final static int MERGE = 7; E8!`d}\#
public final static int IMPROVED_MERGE = 8; _9h$8(wjn
public final static int HEAP = 9; (DiduSJ
Pu3oQDldV
public static void sort(int[] data) { RrMEDMhk6
sort(data, IMPROVED_QUICK); sM-,95H
} }X)vktE+|
private static String[] name={ JIySe:p3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E#J})cPzw
}; UY(T>4H+h
X!]v4ma`
private static Sort[] impl=new Sort[]{ `==l2AX
new InsertSort(), U ]<l-~|
new BubbleSort(), G=:/v
new SelectionSort(), sT)>Vdwf_
new ShellSort(), EOB8|:*
new QuickSort(), /s4~Ij`be
new ImprovedQuickSort(), RIMSXue*Ha
new MergeSort(), :c/54Ss~
new ImprovedMergeSort(), *JJ8\R&P0
new HeapSort() Jq/itsg
}; es)^^kGj6f
aw*]b.f
public static String toString(int algorithm){ ^ptybVo
return name[algorithm-1]; PeJ#9hI~rQ
} ^%7(
yNI0Do 2
public static void sort(int[] data, int algorithm) { =z'(FP5!0
impl[algorithm-1].sort(data); uPfz'|,
} s47R,K$
>Z!!`0{
public static interface Sort { /QQRy_Z1)
public void sort(int[] data); a}yb~:TC
} q/b+V)V
K%J?'-
public static void swap(int[] data, int i, int j) { Yz/Blh%V
int temp = data; .y s_'F-]0
data = data[j]; PBn7{( x
data[j] = temp; h*fN]k6
} Gn2{C%
} ]d1'5F][H