[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; ur'A;B
} GUK/Xiu
int i1=l; qvT9d7x
int i2=mid+1; u^`B#b'
for(int cur=l;cur<=r;cur++){ # OJD<=")
if(i1==mid+1) \dP2xou=
data[cur]=temp[i2++]; ";jhj:Xj
else if(i2>r) 7~IAgjo,@
data[cur]=temp[i1++]; ICGBU>Db
else if(temp[i1] data[cur]=temp[i1++]; m1(rAr1
else dkXK0k
data[cur]=temp[i2++]; T# 8O:
} &BQ`4j~.
} +>s[w{Svy
F`3I~(
} rUj]6j=e
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改进后的归并排序: UE(%R1Py
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package org.rut.util.algorithm.support; b[/-lNrc
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import org.rut.util.algorithm.SortUtil; 0iwx$u7[
iR_X,&p
/** !7_Q_h',
* @author treeroot 5T,`j=\
* @since 2006-2-2 l9-(ofY*J
* @version 1.0 SL*B `P~{
*/ #"TTI vd0
public class ImprovedMergeSort implements SortUtil.Sort { N!,@}s
zW\&q!`IRP
private static final int THRESHOLD = 10; f#[Fqkmj
kQYX[e7n
/* d/"e3S1
* (non-Javadoc) 7VR+EV
* Fd3V5h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N5g!,3
*/ 0{ \AP<
public void sort(int[] data) { &'R\yX<J)
int[] temp=new int[data.length]; b,I$.&BD
mergeSort(data,temp,0,data.length-1); rtOXK4)]I
} pwm]2}+
xvb5-tK -
private void mergeSort(int[] data, int[] temp, int l, int r) { JD,/oL.KA
int i, j, k; A9[l5E
int mid = (l + r) / 2; 32dR`qb
if (l == r) +}%4]O;
return; MbF.KmV
if ((mid - l) >= THRESHOLD) <zrGPwk
mergeSort(data, temp, l, mid); UE*M\r<
else hH%@8'1v
insertSort(data, l, mid - l + 1); 1{_;`V
if ((r - mid) > THRESHOLD) 6VIi nuOW
mergeSort(data, temp, mid + 1, r); d':c
else <D=U=5
insertSort(data, mid + 1, r - mid); uP<tP:
ZMoN
for (i = l; i <= mid; i++) { u>d,6 !
temp = data; G/=tC8eX
} ]x?`&f8i
for (j = 1; j <= r - mid; j++) { RH~KaV3
temp[r - j + 1] = data[j + mid]; 10t9Qv/
} U#-89.x
int a = temp[l]; #pLd';
int b = temp[r]; Kk-A?ju@g
for (i = l, j = r, k = l; k <= r; k++) { 5ILce%#zL
if (a < b) { `Fnt#F}
data[k] = temp[i++]; y1z4qSeM
a = temp; 1^$ vmULj
} else { r6JdF!\d
data[k] = temp[j--]; Q/L:0ovR
b = temp[j]; :IvKxOv
} ?bW|~<X~
} u6;SgPw
} 3lQGU
$fL2w^ @
/** HOBM?|37CU
* @param data qE!.C}L+
* @param l ,~>A>J
* @param i CB\E@u,
*/ n](Q)h'nlo
private void insertSort(int[] data, int start, int len) { Jwgd9a5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6]1cy&SG
} }HRM6fR1S
} .3M=|rE
} E:!?A@Fy
} C,HKao\
[HLXWu3
堆排序： `2()Vf
73 ix4C
package org.rut.util.algorithm.support; 09HlL=0q
AQ7w5}g+V
import org.rut.util.algorithm.SortUtil; %dw@;IZ#8{
f+d[Q1
/** }\?UmuolQ
* @author treeroot EPkmBru ^
* @since 2006-2-2 <#k(g\/R
* @version 1.0 n j0!
*/ D% v{[KY
public class HeapSort implements SortUtil.Sort{ 2= S;<J
Db3#;
/* (non-Javadoc) 1<IF@__
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C5"=%v[gQv
*/ HN?NY
public void sort(int[] data) { ^`?2g[AA
MaxHeap h=new MaxHeap(); g 67;O(3
h.init(data); ~|QhWgq
for(int i=0;i h.remove(); Wo+fMn(O
System.arraycopy(h.queue,1,data,0,data.length); sba+J:#w
} /?C}PM
)\ow/XPE
private static class MaxHeap{ |L%}@e Vw_
$q%r}Cdg
void init(int[] data){ ^}8qPBz
this.queue=new int[data.length+1]; ;n`SF~CU
for(int i=0;i queue[++size]=data; Ti:PKpc
fixUp(size); K8,Q^!5]"
} .ww~'5b0
} :|%k*z
%zsY=qT
private int size=0; @A?Ss8p'
tX)l_?jVH
private int[] queue; R+}7]tva6C
N/CL?Z>c
public int get() { ny'?Hl'Q
return queue[1]; J'4Pp<
} \k&2nYVHf
kn9ul3c
public void remove() { )jc`_{PQg
SortUtil.swap(queue,1,size--); ->_rSjnM{
fixDown(1); *ETSx{)8
} ))ArM-02
file://fixdown ]l/ PyX
private void fixDown(int k) { ^E-BB 6D
int j; 3}hJ`xQ
while ((j = k << 1) <= size) { oA+/F]XJ
if (j < size %26amp;%26amp; queue[j] j++; GP<PU
if (queue[k]>queue[j]) file://不用交换 CvkZ<i){
break; b%A+k"d
SortUtil.swap(queue,j,k); 0KT^V R
k = j; (t[sSl
} -,YoVB!T
} |YEq<wbQ
private void fixUp(int k) { xNAX)v3Z
while (k > 1) { we?# Dui
int j = k >> 1; ,v\^efc:%
if (queue[j]>queue[k]) L/*D5k%J
break; =2J^ '7
SortUtil.swap(queue,j,k); 7H=V|Btnc
k = j; 9:9gam
} 1/\JJ\
} }%)]b*3
V$o]}|
} k7ye,_&>
9^+8b9y
} {(#2G,
+PAb+E|,
SortUtil： {#U3A_y
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package org.rut.util.algorithm; lf2Q
<ddXvUCX
import org.rut.util.algorithm.support.BubbleSort; }+] l_!v*
import org.rut.util.algorithm.support.HeapSort; X5_T?
import org.rut.util.algorithm.support.ImprovedMergeSort; @y1:=["b
import org.rut.util.algorithm.support.ImprovedQuickSort; N1!O8"Q|*3
import org.rut.util.algorithm.support.InsertSort; *TyLB&<t
import org.rut.util.algorithm.support.MergeSort; ;]vJ[mi~
import org.rut.util.algorithm.support.QuickSort; 9u0<$UY%
import org.rut.util.algorithm.support.SelectionSort; O n/q&h5
import org.rut.util.algorithm.support.ShellSort; aWS_z6[t#6
u,~/oTgO
/** |X47&Y
* @author treeroot %^KNY ;E
* @since 2006-2-2 [%LIW%t|
* @version 1.0 5.M82rR;~
*/ 2e?a"Vss
public class SortUtil { Yx[B*] 2
public final static int INSERT = 1; P!xN]or]u
public final static int BUBBLE = 2; Wd>gOE
public final static int SELECTION = 3; z{m%^,Cs,
public final static int SHELL = 4; (Q(=MEar
public final static int QUICK = 5; &RB{0Qhx
public final static int IMPROVED_QUICK = 6; &*j# [6
public final static int MERGE = 7; Q'~3Ik
public final static int IMPROVED_MERGE = 8; [6cF#_)*
public final static int HEAP = 9; +?9. &<?
7MZ(tOR
public static void sort(int[] data) { 328gTP1
sort(data, IMPROVED_QUICK); CpLLsphy
} ;Z6ngS
private static String[] name={ B>r>z5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sD=iHO Am
}; [cso$Tv
6^vz+oN
private static Sort[] impl=new Sort[]{ ~{cG"
new InsertSort(), b=PB"-
new BubbleSort(), 1ir~WFP
new SelectionSort(), p N+1/m,
new ShellSort(), y^:N^Gt
new QuickSort(), | Kw}S/F
new ImprovedQuickSort(), rO[ Zx'a
new MergeSort(), / n@by4;W
new ImprovedMergeSort(), tRYi q
new HeapSort() }rA _4%
}; 0#:St
]k)h<)nY
public static String toString(int algorithm){ v43FU3
return name[algorithm-1]; (|dN6M-.K
} HDQH7Bs
8i~n;AhDs
public static void sort(int[] data, int algorithm) { WH lvd
impl[algorithm-1].sort(data); ana?;NvC
} .azA1@V|
M0K+Vz=
public static interface Sort { _>u0vGF-
public void sort(int[] data); 6b-E|;"]:^
} yL#2|t(
kWZ/O
public static void swap(int[] data, int i, int j) { i%# <Hi7
int temp = data; dOFK;
data = data[j]; 5pz(6gA
data[j] = temp; }J+\o~
} cyXnZs ?|
} OM (D@up