[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; z,avQR&
} X% X$Y6
int i1=l; l0:5q?g
int i2=mid+1; =},{8fZ4
for(int cur=l;cur<=r;cur++){ F;-90w
if(i1==mid+1) e62y
data[cur]=temp[i2++]; R3Ee%0QK
else if(i2>r) HS7_MGU
data[cur]=temp[i1++]; 4~Dax)
else if(temp[i1] data[cur]=temp[i1++]; -p]>Be+^x
else jWSb5#Pw
data[cur]=temp[i2++]; Qm; BUG]
} Ok*Z
} 2kVp_=c
t$5jx
} eG4>d^`c
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改进后的归并排序: .&PzkqWZ
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package org.rut.util.algorithm.support; aHC%19UN
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import org.rut.util.algorithm.SortUtil; R^6Zafp
G5;V.#"Z[
/** m!:.>y
* @author treeroot ;NP[_2|-,
* @since 2006-2-2 `s%QeAde
* @version 1.0 (AuPZ
*/ {+Sq<J_`M
public class ImprovedMergeSort implements SortUtil.Sort { NpR6
nj
private static final int THRESHOLD = 10; -X8eabb
A0>x9XSkJ
/* N+J>7_k
* (non-Javadoc) \K}aQKB/j
* :u-.T.zZl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )2V@p~k?
*/ LABNj{=D!
public void sort(int[] data) { ?+\E3}:
int[] temp=new int[data.length]; r[!(?%>j
mergeSort(data,temp,0,data.length-1); :<%vE!$
} n_9x"m$
:Eo8v$W\RB
private void mergeSort(int[] data, int[] temp, int l, int r) { 8gI\zgS
int i, j, k; JiA'BEJN
int mid = (l + r) / 2; Q;wB{vr$
if (l == r) KuXkI;63J>
return; CKd3w8;
if ((mid - l) >= THRESHOLD) Dft%ip2
mergeSort(data, temp, l, mid); !M^\f N1
else c3W BALdh
insertSort(data, l, mid - l + 1); "lrA%~3%[P
if ((r - mid) > THRESHOLD) ]7vf#1i<
mergeSort(data, temp, mid + 1, r); uLK(F B
else R&Ci/
insertSort(data, mid + 1, r - mid); 1.0J2nZpt
v|&s4x?D
for (i = l; i <= mid; i++) { J3IRP/*z
temp = data; .CS v|:'1
} t7^D-l
for (j = 1; j <= r - mid; j++) { ~6HDW
temp[r - j + 1] = data[j + mid]; -l[jEJS}
} kFLT!k
int a = temp[l]; @n@g)`
int b = temp[r]; y\z > /q
for (i = l, j = r, k = l; k <= r; k++) { ERC<Dd0
if (a < b) { lD3)TAW@o
data[k] = temp[i++]; Ay%:@j(E
a = temp; <T4(H[9B
} else { QptOQ3!
data[k] = temp[j--]; 1R^4C8*B
b = temp[j]; M=[th
} '=#5(O%pp
} jb3.W
} uP6-cs
2-s7cXs
/** GoD ?KC
* @param data H&K3"Ulw
* @param l W_m!@T"@H
* @param i ev"M;"y
*/ t'aSF{%
private void insertSort(int[] data, int start, int len) { qiU5{}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?K<ZkYw?
} @h(!<Ux_
} )S Q('vwg
} qHJ'1~?q
} g}r^Xzd;
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堆排序： 4=s9A
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package org.rut.util.algorithm.support; @'gl~J7
n^Vxi;F
import org.rut.util.algorithm.SortUtil; L=m:/qQL
_.=`>%,
/** bg1un@%!l
* @author treeroot }$:#+ (17
* @since 2006-2-2 ;dOs0/UM&
* @version 1.0 ns26$bU
*/ k9&@(G[K3
public class HeapSort implements SortUtil.Sort{ [Auc*@
6ZOAmH fs
/* (non-Javadoc) eJ:Yj ~X`<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H/`G
*/ bP03G=`6w
public void sort(int[] data) { `Hd9\;NJ
MaxHeap h=new MaxHeap(); doH2R@
h.init(data); B.6`cM^
for(int i=0;i h.remove(); H!. ZH(asY
System.arraycopy(h.queue,1,data,0,data.length); jN{Zw*
} Qg>0G%cXU
!EM#m@kZ{
private static class MaxHeap{ KGQC't
oXbI5XY)wb
void init(int[] data){ C Oa.xyp
this.queue=new int[data.length+1]; OM{Dq|
for(int i=0;i queue[++size]=data; 0 {,h.:
fixUp(size); bKByU{t
} 6e/7'TYwT
} wibwyzo
/.2qWQH
private int size=0; /W0E(8:C)
\=Nm5:
private int[] queue; K9*IA@xL
y<v|X2
public int get() { 6+)x7g1PL
return queue[1]; eK*W=c#@
} jiq2x\\!
-)6;0
public void remove() { hMWo\qM
SortUtil.swap(queue,1,size--); -~} tq]
fixDown(1); dEG ]riO
} `{<JC{yc?
file://fixdown 2md.S$V$,
private void fixDown(int k) { iU XM(]
int j; 'QnW9EHLF
while ((j = k << 1) <= size) { %}ixgs7*c0
if (j < size %26amp;%26amp; queue[j] j++; N2% :h;tf
if (queue[k]>queue[j]) file://不用交换 4@mso+tk
break; <uC<GDO
SortUtil.swap(queue,j,k); 'xk1o,;
k = j; _6LH"o3
} #?Wo <]i
} $Ba`VGP>)3
private void fixUp(int k) { cPJ7E
while (k > 1) { d{3I.$ThH
int j = k >> 1; 99EX8
if (queue[j]>queue[k]) l<Lz{)OR
break; }|,EU!nDi
SortUtil.swap(queue,j,k); ^^eV4Y5`+
k = j; t%:G|n Sz
} 4Lw'v:(
} | 4 `.#4
38"cbHE3
} m3B\)2B
TRo4I{L6S
} ze ?CoDx2
5/k)\`
SortUtil： h>.9RX &
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package org.rut.util.algorithm; F46O!xb%
Y6+k9$h
import org.rut.util.algorithm.support.BubbleSort; o3fR3P%$
import org.rut.util.algorithm.support.HeapSort; OkkhP
import org.rut.util.algorithm.support.ImprovedMergeSort; `k!UjO72
import org.rut.util.algorithm.support.ImprovedQuickSort; lR,G;
import org.rut.util.algorithm.support.InsertSort; -;f+; M
import org.rut.util.algorithm.support.MergeSort; 6S)$3Is
import org.rut.util.algorithm.support.QuickSort; coSTZ&0
import org.rut.util.algorithm.support.SelectionSort; Y5Ft96o))x
import org.rut.util.algorithm.support.ShellSort; aK!xRnY
sBbL~ce50?
/** [O [FCn
* @author treeroot cK/PQsMP
* @since 2006-2-2 3b,=
* @version 1.0 +A&EKk%$ |
*/ Dxz5NW4
public class SortUtil { e W9)@nVJ
public final static int INSERT = 1; 0@:Y>qVa
public final static int BUBBLE = 2; Y7*'QKz2
public final static int SELECTION = 3; xcsFODx~
public final static int SHELL = 4; tnA_!$Y a
public final static int QUICK = 5; 1k*n1t):
public final static int IMPROVED_QUICK = 6; DS.39NY
public final static int MERGE = 7; -`,~9y;tx
public final static int IMPROVED_MERGE = 8; (R,NV3m?w
public final static int HEAP = 9; _,11EeW@
|dW2dQ
public static void sort(int[] data) { @"jmI&hYn
sort(data, IMPROVED_QUICK); dCW0^k
} k\Yu5)
private static String[] name={ 6JUav."`~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zojuH8
}; z<FV1niE
_-g-'Hr+N
private static Sort[] impl=new Sort[]{ .LWOM8)
new InsertSort(), |TC3*Y
new BubbleSort(), 0G~%UYB-
new SelectionSort(), g%@]z8L
new ShellSort(), G~Sy&XJuq
new QuickSort(), ;a#}fX
new ImprovedQuickSort(), %ZJ),9+
new MergeSort(), o'9OPoof:.
new ImprovedMergeSort(), e);bF>.~
new HeapSort() B]&Lh~Im
}; -='8_B/75
xc:`}4
public static String toString(int algorithm){ CnM+HN30o
return name[algorithm-1]; 5<'n
} ~}hba3&b;#
Q1P,=T@
public static void sort(int[] data, int algorithm) { }rFsU\]:q
impl[algorithm-1].sort(data); ~YR <SV\{
} @5<]W+jk4
k~'?"'
public static interface Sort { }I` ku.@5
public void sort(int[] data); ;'b!7sMO~
} 3fbD"gL
9Bbm7Gd
public static void swap(int[] data, int i, int j) { gxBl1
int temp = data; w>/pQ6=OFR
data = data[j]; GU;TK'Yy?
data[j] = temp; QZ:]8MHl]
} M]%!n3Fb
} m!FM+kge