[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; JJ*0M(GG
} XC57];-
int i1=l; 1h&)I%`?
int i2=mid+1; P=}H1#
for(int cur=l;cur<=r;cur++){ zl,bMtQ
if(i1==mid+1) M55e=
data[cur]=temp[i2++]; %y!
else if(i2>r) U3(L.8(sA
data[cur]=temp[i1++]; ~7KynE
else if(temp[i1] data[cur]=temp[i1++]; )sMAhk|
else AW]("pt
data[cur]=temp[i2++]; \>w@=bq26
} EgkZ$ah
} G >I.
s}z(|IrH
} z2"2tFK
q\-xg*'
改进后的归并排序: WX+< 4j
FA<Z37:
package org.rut.util.algorithm.support; Z5{*? 2
|F8;+nAVF#
import org.rut.util.algorithm.SortUtil; 1"*Nb5s
U1OLI]P
/** O1l4gduN|i
* @author treeroot ~x76{.gT
* @since 2006-2-2 #J'Z5)i|
* @version 1.0 D>,$c
*/ W ??;4
public class ImprovedMergeSort implements SortUtil.Sort { 2{jtQlc
iA5* _tK5
private static final int THRESHOLD = 10; =k[(rvU3
]Hv*^Bak
/* ])3lH%4-
* (non-Javadoc) Q-H=wJ4R
* ./aZV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q;{D8 #!
*/ 9RbGa Y&
public void sort(int[] data) { *q\HFI
int[] temp=new int[data.length]; #khyy-B=
mergeSort(data,temp,0,data.length-1); >Rx8 0
} =[v2
vr8J*36{
private void mergeSort(int[] data, int[] temp, int l, int r) { YA1{-7'Q
int i, j, k; ]JhDRJ\
int mid = (l + r) / 2; R|cFpRe
if (l == r) Sm~? zU[k/
return; u|:UFz^p
if ((mid - l) >= THRESHOLD) CfWK6>
mergeSort(data, temp, l, mid); %-0em!tUV
else Q_UCF'f;}
insertSort(data, l, mid - l + 1); x);?jxd
if ((r - mid) > THRESHOLD) 61t-
mergeSort(data, temp, mid + 1, r); q70YNk}
else +J}k_'4&
insertSort(data, mid + 1, r - mid); n?7hp%}
U?+30{hb
for (i = l; i <= mid; i++) { 'Sb6 w+
temp = data; 7.F& {:@_
} }(f,~?CP]
for (j = 1; j <= r - mid; j++) { $u0+29T2O
temp[r - j + 1] = data[j + mid]; 1.ugXD
} FW6E)df
int a = temp[l]; f%(e,KgW=
int b = temp[r]; \?p9qR;"4
for (i = l, j = r, k = l; k <= r; k++) { h}c6+@w&-
if (a < b) { @$N*lrM2
data[k] = temp[i++]; 2={K-s20
a = temp; q%)*,I<
} else { =~(LJPo6
data[k] = temp[j--]; yF [@W<
b = temp[j]; H/ B^N,oi
} CC]@`R5
} Is#v6:#^
} U:T5o]P<
cZ7F1H~
/** b5iJm-
* @param data yx`r;|ds}
* @param l ]#WX|0''^
* @param i Hme@9(zD.
*/ SFm.<^6
private void insertSort(int[] data, int start, int len) { z!uB&2C{k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 55jY` b.
} -*-zU#2|
} ix_$Ok
} LRLhS<9
} uDMUy"8&!
z;z'`A
堆排序： FC/>L
"KQ\F0/
package org.rut.util.algorithm.support; o*5e14W(:
R}K5'`[%ZY
import org.rut.util.algorithm.SortUtil; a 7mKshY(
PPIG?fK)
/** P^d.,
* @author treeroot lk *QV
* @since 2006-2-2 +{l3#Y
* @version 1.0 #,|_d>p:
*/ O(WMTa'%
public class HeapSort implements SortUtil.Sort{ =kZwB*7
|M{,}.*CU
/* (non-Javadoc) ysw6hVb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?X5glDZ$
*/ SieV%T0t1
public void sort(int[] data) { 13NS*%~7[
MaxHeap h=new MaxHeap(); PrYWha=c-
h.init(data); Wb-'E%K
for(int i=0;i h.remove(); '~vSH9nx/
System.arraycopy(h.queue,1,data,0,data.length); 1:~m)"?I_^
} p<^/T,&I
f<t*#]<
private static class MaxHeap{ ^9m]KEucd7
Ee?K|_\${
void init(int[] data){ OM&\Mo
this.queue=new int[data.length+1]; MRY)m@*+6
for(int i=0;i queue[++size]=data; 9pgct6BO
fixUp(size); 'a}{s>{O
} 2I7P}=
} |z~?"F6 Y<
:97`IV%
private int size=0; T2dpn%I
O6pjuhMx
private int[] queue; H{BjxZ~)
-4]6tt'G
public int get() { ]k8XLgJ
return queue[1]; ZBGI_9wZ
} oAL-v428
X DX_c@U
public void remove() { ,'j5tU?c
SortUtil.swap(queue,1,size--); it,%T)2H
fixDown(1); wKYfqNCH
} 38#(ruv
file://fixdown mf3G$=[
private void fixDown(int k) { LP~$7a
int j; Rq7ksTo
while ((j = k << 1) <= size) { "hvw2lyp3
if (j < size %26amp;%26amp; queue[j] j++; ZFzOW
if (queue[k]>queue[j]) file://不用交换 S:d`z'
break; Q3DxjD
SortUtil.swap(queue,j,k); 8+gn Wy
k = j; r,}Zc W+
} 4q[r KNl
} 'Zzm'pC
private void fixUp(int k) { 1/n3qJyx2}
while (k > 1) { s0:1G -I
int j = k >> 1; ,d7@*>T&
if (queue[j]>queue[k]) +a|4XyN
break; DlP}Fp{
SortUtil.swap(queue,j,k); %vksN$^
k = j; j% nd
} ~i \69q%
} ^K"`k43{
]?r8^LyZ4
} i8{jMe!Sa
d_`Ze.^
} 0jXIx2y
!xvPG
SortUtil： >Cf`F{X'U
Jx}5`{\
package org.rut.util.algorithm; Xy{b(b;9
mVkn~LD:0
import org.rut.util.algorithm.support.BubbleSort; =4I361oMf
import org.rut.util.algorithm.support.HeapSort; b{oNV-<&{
import org.rut.util.algorithm.support.ImprovedMergeSort; Y/+ D4^L
import org.rut.util.algorithm.support.ImprovedQuickSort; p.%$
import org.rut.util.algorithm.support.InsertSort; D>mLSh
import org.rut.util.algorithm.support.MergeSort; ;f><;X~KX
import org.rut.util.algorithm.support.QuickSort; *0U(nCT&m
import org.rut.util.algorithm.support.SelectionSort; U +]ab
import org.rut.util.algorithm.support.ShellSort; |Mh;k6
]X5*e'
/** a'\`Mi@rb
* @author treeroot QV't+)uUVo
* @since 2006-2-2 y`BLIEI
* @version 1.0 "7l}X{b
*/ \yxr@z1_b
public class SortUtil { E,rPM
public final static int INSERT = 1; )#Id2b~
public final static int BUBBLE = 2; UJZa1p@L
public final static int SELECTION = 3; {R#nGsrt;
public final static int SHELL = 4; IP >An8+
public final static int QUICK = 5; 2::T,Z
public final static int IMPROVED_QUICK = 6; @iaN@`5I6s
public final static int MERGE = 7; N>~*Jp2;
public final static int IMPROVED_MERGE = 8; fSTEZH
public final static int HEAP = 9; Nwc(<
ijTtyTC
public static void sort(int[] data) { M *}$$Fe|
sort(data, IMPROVED_QUICK); =_XcG!"
} 1#@'U90xf
private static String[] name={ }QI*Ns
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `A'*x]l
}; X#o:-FKf
ABSeX
private static Sort[] impl=new Sort[]{ A=])pYE1
new InsertSort(), 8RK\B%UW
new BubbleSort(), QdRMp n}q
new SelectionSort(), JDP#tA3
new ShellSort(), JWBWa-
new QuickSort(), s?2;u p*D
new ImprovedQuickSort(), KyDBCCOv
new MergeSort(), xs:{%ki
new ImprovedMergeSort(), R0|X;3
new HeapSort() & #|vGhA
}; 7#&sG
qEpBzQ&gX6
public static String toString(int algorithm){ g&[g?L
return name[algorithm-1]; 9\;EX
} V *]!N
#4Z$O(
public static void sort(int[] data, int algorithm) { Vlf@T
impl[algorithm-1].sort(data); 5 909O
} 2AluH8X/
,s2.l/5r;C
public static interface Sort { YK-R|z6K
public void sort(int[] data); &sRyM'XI
} WP>O7[|
/ [19ITZ
public static void swap(int[] data, int i, int j) { #B?7{#.1
int temp = data; &#;,P:.'
data = data[j]; 4>|5B:
data[j] = temp; 4[#.N 3Y4*
} ,^[s4 =3X?
} /j^zHrLN