[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; 5 S$*YRp
} vZ\~+qV,A
int i1=l; NmthvKhH
int i2=mid+1; 6=3}gd5
for(int cur=l;cur<=r;cur++){ ?_3K]i1IS
if(i1==mid+1) X<9jBj/t
data[cur]=temp[i2++]; 3(Kj|u
else if(i2>r) lY yt8H
data[cur]=temp[i1++]; Q+*o-
else if(temp[i1] data[cur]=temp[i1++]; m2AA:u_*j
else yk5-@qo
data[cur]=temp[i2++]; Xhe25
} H,9e<x#own
} eNY$N_P
8QV+DDZx
} yHT8I
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改进后的归并排序: `PnB<rf:*1
?*zRM?*
package org.rut.util.algorithm.support; Z#IRNFj
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import org.rut.util.algorithm.SortUtil; *q{/`Z{wy
@[D-2s
/** P^#<h"Ht
* @author treeroot $/ew'h9q
* @since 2006-2-2 JeU|e$I4>
* @version 1.0 /PN[g~3
*/ /!rH DcR
public class ImprovedMergeSort implements SortUtil.Sort { 0&E{[~Pv
W]{mEB
private static final int THRESHOLD = 10; MYFRrcu;
@x3x/gU
/* zpx
* (non-Javadoc) 1Rc'2Y
* yxh8sAZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) );$_|]#
*/ SsiAyQ|Ma
public void sort(int[] data) { wyeiz7
int[] temp=new int[data.length]; )"s <hR,
mergeSort(data,temp,0,data.length-1); {]]qd!,
} ]f=108|8
$q);xs
private void mergeSort(int[] data, int[] temp, int l, int r) { %:yJ/&-Q,Z
int i, j, k; usnbGkq
int mid = (l + r) / 2; T|`nw_0
if (l == r) }DjW
return; @U08v_,
if ((mid - l) >= THRESHOLD) `?{i dg
mergeSort(data, temp, l, mid); 3QM6M9M
else RI9&KS
insertSort(data, l, mid - l + 1); BR*,E~%
if ((r - mid) > THRESHOLD) ohklLZoZ
mergeSort(data, temp, mid + 1, r); >u?pq6;
else =Bu>}$BD
insertSort(data, mid + 1, r - mid); p3>p1tC
i;>Yx#
for (i = l; i <= mid; i++) { 4Ynv=G Qz
temp = data; 6OuB}*
} aEBQx
for (j = 1; j <= r - mid; j++) { b7 %Z~
temp[r - j + 1] = data[j + mid]; Ucr$5^ME
} qT}<D`\
int a = temp[l]; KfD=3h=
int b = temp[r]; <XG&f
for (i = l, j = r, k = l; k <= r; k++) { wxU@M1w}
if (a < b) { ( `T;nz
data[k] = temp[i++]; 1\K%^<QY
a = temp; PoTJ4z
} else { q9 !)YP+w
data[k] = temp[j--]; L,6v!9@
b = temp[j]; I(!i"b9
} AlF"1X02
} ?Co)7}N
} MHNuA,cz
"X<vgM^:
/** L|O[u^
* @param data C],"va
* @param l KCEBJ{jM
* @param i L[;U Z)V@
*/ x-J.*X/aB
private void insertSort(int[] data, int start, int len) { l12Pj02w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5Us$.p
} RN2^=$'.
} 62BT3/~
} U4`6S43ki
} %@Mv-A6)
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堆排序： zY_?$9l0
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package org.rut.util.algorithm.support; ~^Ceru"<
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import org.rut.util.algorithm.SortUtil; v0psth?qV
r2dU>U*:4
/** J)7m::%I
* @author treeroot ]k0Pe;<
* @since 2006-2-2 ^!a4!DGVT
* @version 1.0 ?w/i;pp<,
*/ ~@Yiwp\"
public class HeapSort implements SortUtil.Sort{ H{yUKZH*
$wnK"k%G
/* (non-Javadoc) f7&53yZF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~1xfE C/
*/ (^),G-]
public void sort(int[] data) { X8m@xFW}
MaxHeap h=new MaxHeap(); }J_"/bB
h.init(data); Vc2(R^
for(int i=0;i h.remove(); 0Ncx':]5
System.arraycopy(h.queue,1,data,0,data.length); 3:H[S_q
} Ui:WbH<b{
VPC7Dh%.
private static class MaxHeap{ 7\;4 d4u
VK)vb.:
void init(int[] data){ Hsdcv~Xr;l
this.queue=new int[data.length+1]; Vv|%;5(
for(int i=0;i queue[++size]=data; nr*nX
fixUp(size); G+5_I"`W
} C0O$iWs=
} [:Upn)9
FqWW[Bgd
private int size=0; o54/r#~fi
P]A~:Lj
private int[] queue; S1vUP5cZ
.5_zh; `
public int get() { Cf~vT"
return queue[1]; RA_gj lJi
} J]AkWEiCJ
V7S[rI<<r
public void remove() { f*%Y]XL;%
SortUtil.swap(queue,1,size--); hD*83_S
fixDown(1); qpEK36Js
} fK 4,k:YC
file://fixdown c'!+]'Lr
private void fixDown(int k) { 9M]%h
int j; $wm.,Vb
while ((j = k << 1) <= size) { S\poa:D`
if (j < size %26amp;%26amp; queue[j] j++; nSSj&q-O
if (queue[k]>queue[j]) file://不用交换 lWyg_YO@
break; }+/F?_I= %
SortUtil.swap(queue,j,k); -J& b~t@
k = j; qx'F9I
} &=.SbS
} #TG7WF5
private void fixUp(int k) { #qcF2&a%
while (k > 1) { O>c2*9PM
int j = k >> 1; ZUd*[\F~!
if (queue[j]>queue[k]) -)pVgf
break; T/Bx3VWL
SortUtil.swap(queue,j,k); Ly_.%f
k = j; ).i :C(|
} $5r1Si)
} _8{6&AmIw
%;ZDw@_<
} U|jip1\
.a_xQ]eQ
} #I-qL/Lm
8b|m66#|
SortUtil： ":vF[6K6
08W^
package org.rut.util.algorithm; NGp^/PZX0
XTKAy;'5
import org.rut.util.algorithm.support.BubbleSort; d-ML[^G
import org.rut.util.algorithm.support.HeapSort; $.Qu55=z<
import org.rut.util.algorithm.support.ImprovedMergeSort; `]$H\gNI[8
import org.rut.util.algorithm.support.ImprovedQuickSort; btDPP k'
import org.rut.util.algorithm.support.InsertSort; sOBuJx${m
import org.rut.util.algorithm.support.MergeSort; A5 <T7~U
import org.rut.util.algorithm.support.QuickSort; JPmZ%]wA
import org.rut.util.algorithm.support.SelectionSort; qG8-UOUDt
import org.rut.util.algorithm.support.ShellSort; ,0^9VWZV
15Vo_ wD<y
/** pcO{%]?p
* @author treeroot ;yDXo\gm
* @since 2006-2-2 lfe^_`ij(+
* @version 1.0 #(dERET*
*/ ;Ebpf J
public class SortUtil { 'U{6LSaCb
public final static int INSERT = 1; G1S:hw%rp
public final static int BUBBLE = 2; &aWY{ ?_
public final static int SELECTION = 3; +l@+e_>
public final static int SHELL = 4; dY$jg
public final static int QUICK = 5; Jh`6@d
public final static int IMPROVED_QUICK = 6; ^SJa/I EZ.
public final static int MERGE = 7; jKhj 7dR
public final static int IMPROVED_MERGE = 8; kOLS<>.
public final static int HEAP = 9; H\RuYCn2G
V~ [I /Vi
public static void sort(int[] data) { zmpQ=%/H
sort(data, IMPROVED_QUICK); yL%k5cO$N
} //H3{^{
private static String[] name={ 5:x .<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t.]c44RY
}; jY8u1z
Rss=ihlM
private static Sort[] impl=new Sort[]{ Jm{~H%
new InsertSort(), d){Al(/
new BubbleSort(), J6*B=PX=(
new SelectionSort(), K)n0?Q_>
new ShellSort(), Q=cbHDB
new QuickSort(), MESPfS+
new ImprovedQuickSort(), C@q&0\HN
new MergeSort(), {1j[RE
new ImprovedMergeSort(), :fE*fU@
new HeapSort() Ea2&7
}; ^jMo?Zwy
KqT~MPl
public static String toString(int algorithm){ #$(wfb9
return name[algorithm-1]; X>6VucH{\
} uyDYS
QWWoj[d#
public static void sort(int[] data, int algorithm) { SsF 5+=A
impl[algorithm-1].sort(data); R WU,v{I9
} Cb/?hT
ofA6EmQ37
public static interface Sort { ds9`AiCW>
public void sort(int[] data); :j m|)
} k<3_!?3
]0wmvTR
public static void swap(int[] data, int i, int j) { 8!AMRE
int temp = data; 4ng*SE_
data = data[j]; f3]u-e'b
data[j] = temp; I#tEDeF2
} vDAv/l9
} 4$+9k;m'