[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; f_~}X#._
} =obt"K%n
int i1=l; PIgGXNo
int i2=mid+1; 'w'Dwqhmr
for(int cur=l;cur<=r;cur++){ U 7EHBW
if(i1==mid+1) H]VsOr
data[cur]=temp[i2++]; f 5mY;z"
else if(i2>r) -e &$,R>;
data[cur]=temp[i1++]; <=$rU232}
else if(temp[i1] data[cur]=temp[i1++]; SgyqmYTvZw
else VtD@&N
data[cur]=temp[i2++]; D7EXqo
} K<RmaXZ
} 0BT;"B1
)o86lH"z
} sWp{Y.
f%vHx,
改进后的归并排序: l#tS.+B7
"L ^TT2
package org.rut.util.algorithm.support; 0W;q!H[G
1d=0q?nH
import org.rut.util.algorithm.SortUtil; j~Xj
{bW"~_6}
/** qw6EPC
* @author treeroot UIO6|*ka
* @since 2006-2-2 7ytm.lU
* @version 1.0 .L~fFns/
*/ aIQrb
public class ImprovedMergeSort implements SortUtil.Sort { !&'# a
k,a,h^{}j
private static final int THRESHOLD = 10; #"=%b e3
=|^X$H
/* 'Na|#tPYI
* (non-Javadoc) (qNco8QKu3
* Up_>y>x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3s3a>
*/ 58M'r{8_
public void sort(int[] data) { I[tAT[ <
int[] temp=new int[data.length]; >&*6Fqd
mergeSort(data,temp,0,data.length-1); 0Ei\VVK>
} LBW.*PHW
N;e;4,_ n
private void mergeSort(int[] data, int[] temp, int l, int r) { rdORNlK&
int i, j, k; s4MNVT
int mid = (l + r) / 2; 'hxs((['\
if (l == r) (3)C_Z
return; QBg}2.
if ((mid - l) >= THRESHOLD) -fb1cv~N
mergeSort(data, temp, l, mid); /E=h{|
else jXc5fXO N
insertSort(data, l, mid - l + 1); d,Hf-zJ%~
if ((r - mid) > THRESHOLD) ~r(g|?}P
mergeSort(data, temp, mid + 1, r); _bN))9 3
else <1ztj#B
insertSort(data, mid + 1, r - mid); !O 0ZD4/{4
"r5'lQI
for (i = l; i <= mid; i++) { NTXws4'D
temp = data; U'JP1\
} m~Lf^gbG?
for (j = 1; j <= r - mid; j++) { VZUZngw
temp[r - j + 1] = data[j + mid]; ,\.YJD>z
} QT7w::ht
int a = temp[l]; :6\-9m8JM
int b = temp[r]; 1C^HCIH7J
for (i = l, j = r, k = l; k <= r; k++) { jEC'l]l
if (a < b) { pkrl@jv >
data[k] = temp[i++]; e_fg s>o`(
a = temp; },?-$eyX
} else { 7H8GkuO
data[k] = temp[j--]; 44Seq
b = temp[j]; P^'>dOI0w
} 9+WY@du+
} *Y|lO
} Bbn832iMUY
#o(?g-3
/** *!-}lc^4
* @param data fJSV)\e0
* @param l (.jO:#eE%
* @param i ?^e*UJNM
*/ e B9m4
private void insertSort(int[] data, int start, int len) { ;j[q?^ b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7)ES!C
} :X1`wBu
} -ucz+{
} <MI$Nl
} "B_5Y&pM`
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堆排序： @j)f(Zlu#
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package org.rut.util.algorithm.support; >tE,8
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import org.rut.util.algorithm.SortUtil; LbtlcpF*~5
1Ud t9$~T
/** YyX^lL_
* @author treeroot brpN>\
* @since 2006-2-2 [A.eVuV;+
* @version 1.0 Rx_,J%0Fq
*/ rm7*l<v6
public class HeapSort implements SortUtil.Sort{ 'tq\<y
M8^ziZY
/* (non-Javadoc) S[\cT:{OE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8ESkG
*/ m%BMd
public void sort(int[] data) { jS5t?0
MaxHeap h=new MaxHeap(); f"}0j|Gg
h.init(data); UC?2mdLt^
for(int i=0;i h.remove(); @n~ND).
System.arraycopy(h.queue,1,data,0,data.length); RN cI]oJ
} N@%xLJF=N>
o$qFa9|Ec?
private static class MaxHeap{ Yp?a=R
qqO10~Xc
void init(int[] data){ 9v5.4a}
this.queue=new int[data.length+1]; x r+E
for(int i=0;i queue[++size]=data; A7I8Z6&
fixUp(size); 7@e[:>e
} %oSfL;W7
} j3V"d3)
R[ +]d|L
private int size=0; MOH,'@&6^
T8M[eSbZ
private int[] queue; 5BGv^Qb_2
<try%p|f
public int get() { /ab K/8ZQ
return queue[1]; E`sapk
} ej??j<]
G%W03c
public void remove() { v~W6yjp
SortUtil.swap(queue,1,size--); zL[U;
fixDown(1); @N:3`[oB
} m8j#{[NE
file://fixdown :`!mCW`Q-
private void fixDown(int k) { 9Rt(G_'
int j; nu1w:
while ((j = k << 1) <= size) { H~1?MAX
if (j < size %26amp;%26amp; queue[j] j++; ./5MsHfbxt
if (queue[k]>queue[j]) file://不用交换 sB*h`vs0T
break; JqH.QnKcv
SortUtil.swap(queue,j,k); u0$5Fd&X
k = j; ]>]H:NEq
} ;Vtpq3
} S+E3;' H
private void fixUp(int k) { hGaYQgGq
while (k > 1) { _tg3%X]
int j = k >> 1; OkO@BWL
if (queue[j]>queue[k]) 9BgQoK@
break; mhHm#
SortUtil.swap(queue,j,k); ::Ve,-0
k = j; n$\6}\k
} KcMzZ!d7m
} Lh5+fk~i~8
l<+,(E=
} <P Z\qE*+y
_ZvX"{y~
} EWvid4QEi
9DocId.
SortUtil： h?O%XnD
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package org.rut.util.algorithm; nh_xbo5L[
70 DQ/b
import org.rut.util.algorithm.support.BubbleSort; j(2tbWg9-
import org.rut.util.algorithm.support.HeapSort; oU{-B$w
import org.rut.util.algorithm.support.ImprovedMergeSort; 8i+jFSZ$
import org.rut.util.algorithm.support.ImprovedQuickSort; C^ k3*N
import org.rut.util.algorithm.support.InsertSort; 3ks|
import org.rut.util.algorithm.support.MergeSort; hc~#l#
import org.rut.util.algorithm.support.QuickSort; +\]S<T*;
import org.rut.util.algorithm.support.SelectionSort; )7BNzj"~
import org.rut.util.algorithm.support.ShellSort; i\c^h;wX
]`+"o[
/** ?2 O-EiWjZ
* @author treeroot J5r L7
* @since 2006-2-2 #onfac-3
* @version 1.0 Xwn|.
*/ Y{\2wU!Isn
public class SortUtil { m]b.P,~v
public final static int INSERT = 1; jl|X$w
public final static int BUBBLE = 2; i=+<7]Q
public final static int SELECTION = 3; 9=;g4I
public final static int SHELL = 4; 9HBx[2&
public final static int QUICK = 5; k@X As
public final static int IMPROVED_QUICK = 6; [O =)FiY-
public final static int MERGE = 7; Ql!6I(
public final static int IMPROVED_MERGE = 8; eXtF[0f
public final static int HEAP = 9; ~s^6Q#Z9|
dYttse'
public static void sort(int[] data) { /-} p7AM
sort(data, IMPROVED_QUICK); dXr !_)i
} $[9V'K
private static String[] name={ PfMOc+ q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ay. q)
}; 1F%*k &R
9hi(P*%q
private static Sort[] impl=new Sort[]{ {Eb2<;1o{
new InsertSort(), $2Tty 7
new BubbleSort(), E?W!.hbA
new SelectionSort(), bu!<0AP"N+
new ShellSort(), [ZpG+VAJ8
new QuickSort(), a~+WL
new ImprovedQuickSort(), zK]%qv]
new MergeSort(), 7qdl,z
new ImprovedMergeSort(), "gVH;<&]
new HeapSort() QrRCsy70
}; uY#58?>'j
b8xfV{3L
public static String toString(int algorithm){ nT6iS}h
return name[algorithm-1]; "MKsSty
} `rFGSq$9
Pn){xfqDl
public static void sort(int[] data, int algorithm) { t7& GCZ
impl[algorithm-1].sort(data); _ -FQ78C
} D}C*8s bC}
C'#)bX{
public static interface Sort { 6j.(l4}
public void sort(int[] data); MkIO0&0O
} 2H0q\zZ
"VhrsVT
public static void swap(int[] data, int i, int j) { z[I/ AORl
int temp = data; ,}$x'8v
data = data[j]; %1l80Z
data[j] = temp; st^N QL
} UVi/Be#|
} 5s2}nIe