[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; tb;!2$
} 2qEm,x'S
int i1=l; BE n$~4-
int i2=mid+1; }?f%cRT$
for(int cur=l;cur<=r;cur++){ 0IHcyb
if(i1==mid+1) FBit/0
data[cur]=temp[i2++]; *P4G}9B|9:
else if(i2>r) c_#\'yeW
data[cur]=temp[i1++]; I!IWmU6FN
else if(temp[i1] data[cur]=temp[i1++]; 3QL I|VpO
else 9NCo0!Fb
data[cur]=temp[i2++]; 2z/qbzG7
} S1 22. I
} `% sKF
(n'Mf
} MCN}pi
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改进后的归并排序: sjBP#_lW
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package org.rut.util.algorithm.support; H8[L:VeNT
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import org.rut.util.algorithm.SortUtil; 56i9V9{2
?yKW^,q+
/** _yje"
* @author treeroot Y8I*B=7
* @since 2006-2-2 NABwtx>.
* @version 1.0 YJZViic
*/ <^j,jX
public class ImprovedMergeSort implements SortUtil.Sort { ]IQTf5n
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private static final int THRESHOLD = 10; K07b#`NF6
JTu^p]os?
/* lp`raNNo
* (non-Javadoc) 3ZNm,{
* aa!o::;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P;R`22\3
*/ _8$arjx=
public void sort(int[] data) { }eA2y($N
int[] temp=new int[data.length]; ~9.0:Fm<
mergeSort(data,temp,0,data.length-1); HorFQ?8
} 9F8"(
M7R.?nk
private void mergeSort(int[] data, int[] temp, int l, int r) { J!sIxwF
int i, j, k; 'bN\8t\S
int mid = (l + r) / 2; jOs&E^">&B
if (l == r) B%95M|
return; c#eV!fl>&
if ((mid - l) >= THRESHOLD) 0rbMT`Hy
mergeSort(data, temp, l, mid); #biI=S
else 2CX'J8Sy
insertSort(data, l, mid - l + 1); w4YuijhW
if ((r - mid) > THRESHOLD) #T0uPK ;
mergeSort(data, temp, mid + 1, r); $bQ[H[4l
else @dimZsi1
insertSort(data, mid + 1, r - mid); . IBy'
Ii"h:GY;\
for (i = l; i <= mid; i++) { )l}Gwd]h
temp = data; 8^26g3
} OZ2gIK
for (j = 1; j <= r - mid; j++) { u~Zx9>f
temp[r - j + 1] = data[j + mid]; U~krv>I
} tHezS~t_
int a = temp[l]; M*|,05>
int b = temp[r]; )H&rr(
for (i = l, j = r, k = l; k <= r; k++) { d(u"^NH;
if (a < b) { k&-SB -
data[k] = temp[i++]; xij`Mr
a = temp; Bi7QYi/
} else { '8+<^%c
data[k] = temp[j--]; 1m$:Rn^
b = temp[j]; I5[HD_g:
} =<ngtN
} x9UF
} +Tnn'^4
@BbqYX
/** 8PQKB*<dB"
* @param data APydZ
* @param l +C4UM9
* @param i 2H7b2%
*/ *c<=IcA
private void insertSort(int[] data, int start, int len) { .!yXto:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [=dK%7v
} WEgJ_dB
} &jJj6 +P\
} $j?zEz
} ~gz_4gzb
@VlDi1
堆排序： (~6oA f
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package org.rut.util.algorithm.support; "uR,WY
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import org.rut.util.algorithm.SortUtil; &z!yY^g
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/** `acX1YWh5
* @author treeroot 7[=MgnmuC
* @since 2006-2-2 jQDXl
* @version 1.0 .xnJT2uu'
*/ }=.:bwX5
public class HeapSort implements SortUtil.Sort{ Bp #:sAG
M^f+R'Q3
/* (non-Javadoc) cB,O"-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T0=8 U; =
*/ hfUN~89;
public void sort(int[] data) { /DxaKZ ;b
MaxHeap h=new MaxHeap(); s,&tD WU
h.init(data); sFhmp
for(int i=0;i h.remove(); .UJp#/EHs
System.arraycopy(h.queue,1,data,0,data.length); 8|FHr,
} /CRZ
565UxG }
private static class MaxHeap{ #^|"dIZ_M
vumA W*
void init(int[] data){ NGsG4y^g?z
this.queue=new int[data.length+1]; ;Mzy>*#$Q
for(int i=0;i queue[++size]=data; tGq0f"}'J
fixUp(size); W!@*3U]2R
} 3zdm-5R.b
} :Kc9k(3&r
8RGU^&
private int size=0; JL[xrK0
WS17DsWW
private int[] queue; Y 6B7qp
QU&LC
public int get() { >"}z % #
return queue[1]; i@Vi.oc4[
} fa~4+jx>S
U]!~C 1cmw
public void remove() { ,E YB E
SortUtil.swap(queue,1,size--); FVi7gg.?
fixDown(1); puE!7:X7
} CF|4, K)
file://fixdown &x= PAu
private void fixDown(int k) { t|/{oAj
int j; d~ m,hCTe
while ((j = k << 1) <= size) { (c^ZFh2]
if (j < size %26amp;%26amp; queue[j] j++; h!>K[*
if (queue[k]>queue[j]) file://不用交换 %3ieR}:/e&
break; ZT;8Wvo
SortUtil.swap(queue,j,k); 6S`J7[
k = j; ~hx__^]d
} mpcO-%a
} 6 07"Z\
private void fixUp(int k) { 0+H4sz%.
while (k > 1) { 1?!z<<
int j = k >> 1; Wzm!:U2R*
if (queue[j]>queue[k]) Dht,!LVb;
break; )I/K-zj
SortUtil.swap(queue,j,k); 8v|?g8e3
k = j; y5oC|v7
} B<et&r;
} $7\!
g#??Mz
} .=I:cniw\r
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} Zndv!z
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SortUtil： Ms * `w5n
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package org.rut.util.algorithm; 2|n)ZP2cp
p`oSI}ZwB
import org.rut.util.algorithm.support.BubbleSort; r]6X
import org.rut.util.algorithm.support.HeapSort; ;";#{B:
import org.rut.util.algorithm.support.ImprovedMergeSort; ^nPk;%`0
import org.rut.util.algorithm.support.ImprovedQuickSort; dq.'[
import org.rut.util.algorithm.support.InsertSort; #KFpT__F
import org.rut.util.algorithm.support.MergeSort; hoJ{C 0
import org.rut.util.algorithm.support.QuickSort; @'D ,T^I
import org.rut.util.algorithm.support.SelectionSort; p|q}z/
import org.rut.util.algorithm.support.ShellSort; CVa?L"lK
VZo,AP~
/** U/p|X)
* @author treeroot ke~S[bL%-
* @since 2006-2-2 W.|r=
* @version 1.0 D(z}c,
*/ 7ThGF
public class SortUtil { L5wrc4
public final static int INSERT = 1; T^b62j'b5_
public final static int BUBBLE = 2; PF6w'T 5
public final static int SELECTION = 3; 7BNu.5*y
public final static int SHELL = 4; MPS{MGVjbJ
public final static int QUICK = 5; 3$~6+i
public final static int IMPROVED_QUICK = 6; C VyYV &U,
public final static int MERGE = 7; C;DR@'+q
public final static int IMPROVED_MERGE = 8; s]lIDp}
public final static int HEAP = 9; 3M@!?=|U
1G6 %?Iph
public static void sort(int[] data) { Ok/U"N-
sort(data, IMPROVED_QUICK); CcDi65s
} $>Mqo
private static String[] name={ \NgBF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &IZthJqV
}; < .\2Ec
z]\CI:
private static Sort[] impl=new Sort[]{ q.GA\o
new InsertSort(), #0F6{&; M
new BubbleSort(), o(q][:,h
new SelectionSort(), df'xx)kW
new ShellSort(), >}?4;:.=
new QuickSort(), M@wQ6ow
new ImprovedQuickSort(), "i5Rh^
new MergeSort(), OS.oknzZZ
new ImprovedMergeSort(), zA<Hj;9SM
new HeapSort() <D1>;C
}; O]/BNacS
rB<za I\V
public static String toString(int algorithm){ N.l\2S}
return name[algorithm-1]; DqQ+8 w
} <}vult^
#("/ 1N6
public static void sort(int[] data, int algorithm) { @An "ClDa
impl[algorithm-1].sort(data); O=A(x m#
} %XUV[L}
Y, ?- []
public static interface Sort { 0=,vdT
public void sort(int[] data); AVR=\ qR
} FlqE!6[[
#&oL iz=hZ
public static void swap(int[] data, int i, int j) { -weCdTY`X
int temp = data; pT=YV k
data = data[j]; DjK
data[j] = temp; PrZs@ Y
} 5PCMxjon
} L FncY(b