[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; zdam^o
} Zj'9rXhrM1
int i1=l; m)v&v6
int i2=mid+1; 'm$L Ij?@
for(int cur=l;cur<=r;cur++){ )9]PMA?u
if(i1==mid+1) p4Z(^+Aa
data[cur]=temp[i2++]; l.M0`Cn-%
else if(i2>r) Iu=(qU
data[cur]=temp[i1++]; dSHDWu&
else if(temp[i1] data[cur]=temp[i1++]; 5Gm_\kd
else c7H^$_^=
data[cur]=temp[i2++]; y?3;06y|
} K{+2G&i
} KMax$
fp"W[S|uL
} 4#Jg9o
O;3>sLgc
改进后的归并排序: p6S8VA
=Dj#gV
package org.rut.util.algorithm.support; cFXp
R=\IEqqsi
import org.rut.util.algorithm.SortUtil; !dq.KwL
"#g}ve,
/** <F'\lA9
* @author treeroot :g/tZd$G5
* @since 2006-2-2 }x,S%M-
* @version 1.0 Dw"\/p:-3
*/ &H+xzN
public class ImprovedMergeSort implements SortUtil.Sort { :Hbv)tS\3w
2~[juWbz
private static final int THRESHOLD = 10; kq-) ^,{y
D2O~kNd
/* *m(=V1"
* (non-Javadoc) dc'Y`e
* -nwypu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FP>2C9:d
*/ 0n'_{\yz
public void sort(int[] data) { "J1 4C9u
int[] temp=new int[data.length]; 2fS:- 8N
mergeSort(data,temp,0,data.length-1); U$UIN#
} y1#1Ne_
\{D" !e
private void mergeSort(int[] data, int[] temp, int l, int r) { ),!qTjD
int i, j, k; 5lum$5
int mid = (l + r) / 2; y B$x>Q'C(
if (l == r) |vC~HJpuv'
return; hqdDm
if ((mid - l) >= THRESHOLD) $pz/?>!
mergeSort(data, temp, l, mid); H,NF;QPPC
else rT>wg1:
insertSort(data, l, mid - l + 1); Alq(QDs
if ((r - mid) > THRESHOLD) qxj(p o
mergeSort(data, temp, mid + 1, r); '<uq3?5
else Xwtqi@zlE
insertSort(data, mid + 1, r - mid); jiC>d@~y
v` r:=K
for (i = l; i <= mid; i++) { ,fRq5"?
temp = data; Tsx>&WC
} oL<St$1
for (j = 1; j <= r - mid; j++) { Z30A{6}
temp[r - j + 1] = data[j + mid]; "wc<B4"
} tl>7^hH
int a = temp[l]; 7-A2_!_x{
int b = temp[r]; E(|>Ddv B&
for (i = l, j = r, k = l; k <= r; k++) { i-&yH
if (a < b) { t`QENXA}
data[k] = temp[i++]; Bbp|!+KP{(
a = temp; ##ANrG l
} else { i@'dH3-kO
data[k] = temp[j--]; P93@;{c(
b = temp[j]; 6H|S;K+
} {xB3S_,8
} jj>]9z
} Z6m)tZVM
% u6Sr5A[s
/** b`_Q8 J
* @param data B7%U_F|m
* @param l FgO)DQm
* @param i #fM'>$N
*/ ,u!sjx
private void insertSort(int[] data, int start, int len) { B/C,.?Or
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D)Dr__x
} wA.\i
} MO]&bHH7;
} nj4/#W
} dqAw5[qMJ
eDB;cN
堆排序： BerwI 7!=
J8D,ZfPN`d
package org.rut.util.algorithm.support; o"SMbj
GKCroyor
import org.rut.util.algorithm.SortUtil; 9!tW.pK5
\j.:3Xr
/** tg/H2p^Y
* @author treeroot F1hHe<)
* @since 2006-2-2 h7@6T+#WoT
* @version 1.0 A)~6Im
*/ B-ESFATc
public class HeapSort implements SortUtil.Sort{ oXS}IL og'
H[|~/0?K
/* (non-Javadoc) d!{r v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q'11^V!0
*/ B1Oq!k
public void sort(int[] data) { |'2d_vR
MaxHeap h=new MaxHeap(); BORA(,
h.init(data); LHmZxi?
for(int i=0;i h.remove(); .8|X
System.arraycopy(h.queue,1,data,0,data.length); t:c.LFrF
} -.3w^D"l
@|)Z"m7
private static class MaxHeap{ L8n|m!MOD
qY#6SO`_iy
void init(int[] data){ ~_a-E
this.queue=new int[data.length+1]; 4/)k)gLI
for(int i=0;i queue[++size]=data; Qci]i)s$js
fixUp(size); 6@Y|"b
} {^\r`Vp
} 3N:D6w-R
::F|8
private int size=0; Np)lIGE
:i7;w%B
private int[] queue; ]N[ 5q=A5
GH xp7H
public int get() { *owU)
return queue[1]; |D.ND%K&
} D3A/l
S@sO;-^+
public void remove() { u-C)v*#L
SortUtil.swap(queue,1,size--); s<o7!!c
fixDown(1); iyog`s c
} 39jG8zr=Z[
file://fixdown -{+}@?
private void fixDown(int k) { l@:0e]8|o
int j; V1JIht>Opo
while ((j = k << 1) <= size) { .{KVMc
if (j < size %26amp;%26amp; queue[j] j++; Lh<).<S
if (queue[k]>queue[j]) file://不用交换 6aV_@no.C
break; bu"!jHPB
SortUtil.swap(queue,j,k); 0|b>I!_"g
k = j; &VcV$8k
} 1i] ^{;]
} FCn_^l)EA
private void fixUp(int k) { Tb-F]lg$
while (k > 1) { -`t^7pr
int j = k >> 1; snikn&
if (queue[j]>queue[k]) i 3SHg\~Z
break; 2:=
SortUtil.swap(queue,j,k); ,v&(YOd
k = j; 8JD,u
} <Ok3FE.K
} o8vug$=Z
IqGdfL6[(
} A+)`ZTuO
2Wb]4-
} F}qc0
Hq 188<
SortUtil： T,tdL N-
j8`BdKg
package org.rut.util.algorithm; u~-8d;+?y
eR"<33{
import org.rut.util.algorithm.support.BubbleSort; ;({W#Wa
import org.rut.util.algorithm.support.HeapSort; NgCvVWto
import org.rut.util.algorithm.support.ImprovedMergeSort; 2 Vrw
import org.rut.util.algorithm.support.ImprovedQuickSort; *WT`o>
import org.rut.util.algorithm.support.InsertSort; AzxXB
import org.rut.util.algorithm.support.MergeSort; 7\q~%lDE
import org.rut.util.algorithm.support.QuickSort; 6MkP |vr6
import org.rut.util.algorithm.support.SelectionSort; ;w[0t}dPl
import org.rut.util.algorithm.support.ShellSort; OydwE
O0y_Lm\
/** +?!(G}5
* @author treeroot ?I@W:#>o
* @since 2006-2-2 ia 73?*mXT
* @version 1.0 3%ZOKb"D*
*/ *=c1do%F
public class SortUtil { mdgi5v
public final static int INSERT = 1; VU d\QR-
public final static int BUBBLE = 2; baK$L;Xo:
public final static int SELECTION = 3; "FKOaQ%IH
public final static int SHELL = 4; #N cK X
public final static int QUICK = 5; b>N8F^}~O
public final static int IMPROVED_QUICK = 6; 1y4
public final static int MERGE = 7; <A'$%`6m
public final static int IMPROVED_MERGE = 8; 0_t`%l=
public final static int HEAP = 9; 8*T=Xei8
E+w<RNBmz
public static void sort(int[] data) { `^y7f
sort(data, IMPROVED_QUICK); n=ux5M
} 5[u]E~Fl}
private static String[] name={ xUistwq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vy,DN~ag
}; hfy_3}_
b%/ 1$>_
private static Sort[] impl=new Sort[]{ {jX2}
new InsertSort(), Per1IcN
new BubbleSort(), >J>[& zS
new SelectionSort(), %-0t?/>
new ShellSort(), ;BIY^6,7e
new QuickSort(), .h4 \Y A
new ImprovedQuickSort(), w:Kl6"c
new MergeSort(), q#=(e:aCb
new ImprovedMergeSort(), 5N&?KA-
new HeapSort() J~UuS+Ufv
}; Tyf`j,=
7VFLJrt
public static String toString(int algorithm){ YVanW
return name[algorithm-1]; 'ub@]ru|
} .xWC{}7[
OH(waKq2I
public static void sort(int[] data, int algorithm) { +&2%+[nBZ
impl[algorithm-1].sort(data); %n:k#
} b`O'1r\Y;
d4c8~L H-
public static interface Sort { nK%LRcAs
public void sort(int[] data); QW(Mz Hg
} }@+:\
~1vDV>dpE
public static void swap(int[] data, int i, int j) { [^98fAlz6
int temp = data; 7Da`
data = data[j]; h{HHLR
data[j] = temp; k{SAvKx=
} d,n 'n
} &@Be2!%'9K