[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; C[$<7Mi|;
} l}c<eEfOy"
int i1=l; `wG&Cy]v
int i2=mid+1; 55|$Imnf
for(int cur=l;cur<=r;cur++){ g(;ejKSR
if(i1==mid+1) ln!KL'T]
data[cur]=temp[i2++]; }mJ)gK5b 6
else if(i2>r) X}bgRzj
data[cur]=temp[i1++]; DFjkp;`1
else if(temp[i1] data[cur]=temp[i1++]; tbk9N( R
else )ZmE"
data[cur]=temp[i2++]; +V\NMW4d
} -XY]WWlq
} (/Y gcT
&c@I4RV|q
} j({L6</x
CGg6nCB
改进后的归并排序: Ri-wbYFaP
$S cjEG:6
package org.rut.util.algorithm.support; d ly 0874
@o^sp|k !
import org.rut.util.algorithm.SortUtil; Vgm{=$
%I=J8$B]f
/** Y2D)$
* @author treeroot {5z?5i ?D
* @since 2006-2-2 9hp0wi@W}
* @version 1.0 ,!py n<_
*/ =O_[9kuJ
public class ImprovedMergeSort implements SortUtil.Sort { 02S(9^=
ta4<d)nB
private static final int THRESHOLD = 10; Vis?cuU/
E0h!%/+-L
/* @+!d@`w:z2
* (non-Javadoc) 9_/1TjrDN
* D 7E^;W)H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |)_<JAN
*/ T<=\5mn
public void sort(int[] data) { jKQP0 t-
int[] temp=new int[data.length]; :{6[U=O
mergeSort(data,temp,0,data.length-1); 5Q'R5]?h
} 1Q$ M/}
Mo<p+*8u:
private void mergeSort(int[] data, int[] temp, int l, int r) { p.IfJ|
int i, j, k; e)bqE^JP
int mid = (l + r) / 2; 6%xl}z]o
if (l == r) C]XDDr
return; ~gDtj&F
if ((mid - l) >= THRESHOLD) Bms?`7}N
mergeSort(data, temp, l, mid); ,?f(~<Aj
else sR0nY8@F
insertSort(data, l, mid - l + 1); WL~`L!_. A
if ((r - mid) > THRESHOLD) K=>/(sWiq
mergeSort(data, temp, mid + 1, r); i!nl%%
else %?$"oWmenS
insertSort(data, mid + 1, r - mid); JZ7-? o
nC Z
for (i = l; i <= mid; i++) { Zn!SHj
temp = data; - |'wDf?H
} 1f:k:Y9i
for (j = 1; j <= r - mid; j++) { vT~a}
temp[r - j + 1] = data[j + mid]; =w5w=qB
} rYqvG
int a = temp[l]; 33C#iR1(WJ
int b = temp[r]; lqs_7HhvRS
for (i = l, j = r, k = l; k <= r; k++) { /4f;Niem
if (a < b) { 8|/YxF<
data[k] = temp[i++]; x/<.?[A
a = temp; 7> QtO
} else { 32Z4&~I
data[k] = temp[j--]; dA~6{*)
b = temp[j]; h 2zCX
} sOW|TN>y\
} J.d `tiN
} w?C\YKF7
$p@g#3X`
/** {Q"<q`c
* @param data tpD?-`9o
* @param l xVPGlU
* @param i I|:j~EY
*/ aU!UY(
private void insertSort(int[] data, int start, int len) { @mazwr{B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -wt2ydzos
} V]2z5u_q
} kShniN
} ublY!Af
} YGO@X(ej,
5W48z%MN
堆排序： fYi!Z/Ck2
6M9rC[h\
package org.rut.util.algorithm.support; H6eGLg={
#Grm-W9E
import org.rut.util.algorithm.SortUtil; ]gW J,
S7vE[VF5
/** @:@rks&
* @author treeroot `4qKQJw
* @since 2006-2-2 yiq#p"Hs
* @version 1.0 >A/=eW/q
*/ (r4\dp&
public class HeapSort implements SortUtil.Sort{ dw|0K+-PH
"gz;Q
/* (non-Javadoc) ;~J~g#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _<7FR:oBZ
*/ Ymu=G3-
public void sort(int[] data) { ccSSau5N
MaxHeap h=new MaxHeap(); p3o?_ !Z
h.init(data); _u>>+6,p
for(int i=0;i h.remove(); :6+~"7T
System.arraycopy(h.queue,1,data,0,data.length); u"jnEKN0y
} LayU)TIt
8gNEL+
private static class MaxHeap{ nmGHJb,$
M)7enp) F.
void init(int[] data){ V]}b3Y!(
this.queue=new int[data.length+1]; Vvj]2V3
for(int i=0;i queue[++size]=data; 8rYK~Sz
fixUp(size); %-Z~f~<?
} fL;p^t u3
} ULjzhy+(8
!Xi>{nV
private int size=0; d#Ajb
Kc0OLcu^d
private int[] queue; vp@+wh]#
=*Xf(mhc
public int get() { MjTKM;
return queue[1]; bB-v ar
} h'p0V@!N
;>9pJ72r
public void remove() { rE:>G]j6
SortUtil.swap(queue,1,size--); ErC[Zh"''
fixDown(1); Cj+=9Dc
} ~~,<+X:
file://fixdown >lmL
private void fixDown(int k) { P1n@E*~V5
int j; Uj)]nJX
while ((j = k << 1) <= size) { iurB8~Y
if (j < size %26amp;%26amp; queue[j] j++; }i:'f2/
if (queue[k]>queue[j]) file://不用交换 0)!zhO_}
break; ,be?GAq
SortUtil.swap(queue,j,k); m5N&7qgp
k = j; wlM ?gQXU[
} w ZAXfNA
} $4L3y uH
private void fixUp(int k) { {6sfa?1j
while (k > 1) { Fr3t[:D
int j = k >> 1; x["
if (queue[j]>queue[k]) nif'l/@"
break; ]s@8I2_
SortUtil.swap(queue,j,k); #7h fEAk
k = j; V&H8-,7z
} (02(:;1
} w>_EM&r6~u
nh)R
} `F8;{`a
w.p'Dpw
} t8 "-zd8
"lf3hWGw
SortUtil： jqWvLBU!
^6>|!
package org.rut.util.algorithm; =osw3"ng
:j<JZs>`R
import org.rut.util.algorithm.support.BubbleSort; ZiYzsn
import org.rut.util.algorithm.support.HeapSort; 0\@|M@X=
import org.rut.util.algorithm.support.ImprovedMergeSort; t}*!UixE
import org.rut.util.algorithm.support.ImprovedQuickSort; |LE++t*X~
import org.rut.util.algorithm.support.InsertSort; Po.BcytM
import org.rut.util.algorithm.support.MergeSort; \r,.hUp
import org.rut.util.algorithm.support.QuickSort; $:II@=
import org.rut.util.algorithm.support.SelectionSort; #9VY[<
import org.rut.util.algorithm.support.ShellSort; #/<Y!qV&
4 GW[GT
/** , vyx`wDd
* @author treeroot %W;Gf9.w
* @since 2006-2-2 4ZpF1Zc4B
* @version 1.0 agT[y/gb
*/ e~]e9-L>I
public class SortUtil { }yDq\5s Q[
public final static int INSERT = 1; {NgY8wQB
public final static int BUBBLE = 2; \3?;[xD
public final static int SELECTION = 3; B RjKV
public final static int SHELL = 4; 4^_Au^8R(
public final static int QUICK = 5; 9?chCO(@
public final static int IMPROVED_QUICK = 6; .MARF
public final static int MERGE = 7; VQMd[/
public final static int IMPROVED_MERGE = 8; |o=ST
public final static int HEAP = 9; Yka&Kkw
\ZWmef
public static void sort(int[] data) { _J~ta.
sort(data, IMPROVED_QUICK); ik0Q^^1?Y
} n4T2'e
private static String[] name={ @i-@mxk6<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]f-'A>MC
}; 00a<(sS;
#'J7Wy
private static Sort[] impl=new Sort[]{ C+m^Z[
new InsertSort(), )Q/`o,Vm
new BubbleSort(), EiP&Y,vT
new SelectionSort(), (A fbS=[
new ShellSort(), '4lT*KN7\
new QuickSort(), wf<`J/7u
new ImprovedQuickSort(), b(-t)5^}
new MergeSort(), }.V0SM6
new ImprovedMergeSort(), >@"3Q`
new HeapSort() [3sxzU!t~
}; TxxB0
nk$V{(FJ
public static String toString(int algorithm){ o+Ti$`2<O7
return name[algorithm-1]; ur,"K'w
} bTy)0ta>AF
<;0N@
public static void sort(int[] data, int algorithm) { ';|>`<
impl[algorithm-1].sort(data); {^5<{j3e
} )k] !u
V3~a!k
public static interface Sort { ^ R^N`V
public void sort(int[] data); B "F`OS[
} ^O Xr: P
JKi@Kw
public static void swap(int[] data, int i, int j) { ;4v}0N~.
int temp = data; P9mxY*K)%5
data = data[j]; "q>I?UcZ
data[j] = temp; gXLZ)>+A+
} ;@YF}%!+W
} xgqv2s>L