[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; H/o_?qK
} K43%9=sM
int i1=l; $DHE%IN`
int i2=mid+1; q5;dQ8Y?
for(int cur=l;cur<=r;cur++){ eHr0],
if(i1==mid+1) b A+_/1C
data[cur]=temp[i2++]; LG[N\%<!H
else if(i2>r) .S//T/3O]Q
data[cur]=temp[i1++]; s"jvO>[
else if(temp[i1] data[cur]=temp[i1++]; M}8P _<,
else #9,8{ O"
data[cur]=temp[i2++]; g+#<;Gbpe
} H^d?(Svh
} l7-lXl"%q
Tg{5%~L]
} #/oH #/?
+ktv:d
改进后的归并排序: #W~jQ5NS\
sOhn@*X
package org.rut.util.algorithm.support; Qs1CK;+zU
p:08q B|uQ
import org.rut.util.algorithm.SortUtil; ?%,LZw^[
T5:Q_o]
/** |Y3w6!$
* @author treeroot XvI~"}
* @since 2006-2-2 6 f*:;
* @version 1.0 `2f/4]fY
*/ Z9vMz3^N
public class ImprovedMergeSort implements SortUtil.Sort { -06G.;W\^
Bsa;,
private static final int THRESHOLD = 10; NBk0P*SI
~4fE`-O
/* [Hh*lKg
* (non-Javadoc) iT'doF
* $_S-R 3L\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #)'Iqaq7
*/ )LGVR3#
public void sort(int[] data) { . 1kB8&}
int[] temp=new int[data.length]; OBWb0t5H?
mergeSort(data,temp,0,data.length-1); 'I,a 29
} +La2-I
ZID-~ 6
private void mergeSort(int[] data, int[] temp, int l, int r) { 48:xvTE?N
int i, j, k; )U~|QdZ
int mid = (l + r) / 2; %9cT#9!7
if (l == r) W&hW N9iR
return; m7^f%<l
if ((mid - l) >= THRESHOLD) ,5W7a
mergeSort(data, temp, l, mid); 8?Rp2n*o
else y8YsS4E^Q
insertSort(data, l, mid - l + 1); "^&H9.z,v
if ((r - mid) > THRESHOLD) _d 6'f8[&
mergeSort(data, temp, mid + 1, r); (\ab%M
else }+@!c%TCx~
insertSort(data, mid + 1, r - mid); l8G1N[
?^U?ua6
for (i = l; i <= mid; i++) { Jl_W6gY"Z
temp = data; NtM>`5{?
} YE`Y t
for (j = 1; j <= r - mid; j++) { l`"?KD
temp[r - j + 1] = data[j + mid]; 8i',~[
} I8XP`Ccq
int a = temp[l]; ^6 wWv&G[8
int b = temp[r]; sU>IETo
for (i = l, j = r, k = l; k <= r; k++) { P*KIk~J
if (a < b) { t+v%%N_
data[k] = temp[i++]; NgTB4I8P
a = temp; +,,(8=5g
} else { /4T6Z[=s
data[k] = temp[j--]; @T^FOTW
b = temp[j]; %SC Jmn2
} kt6)F&;$
} rR6}
} #LR4%}mg
q8P&rMwy
/** 0`"oR3JY
* @param data ]@ruizb8
* @param l 1^|#QMT
* @param i *v%y;^{k[/
*/ x+cL(R
private void insertSort(int[] data, int start, int len) { uH*6@aYPo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ht>%O7
} Q/g!h}>(.
} P")I)>Q6
} t*hy"e{*a
} \ ku5%y
QF/ULW0G!
堆排序： <|l}@\iRX
'Q=;I
package org.rut.util.algorithm.support; h/n(
fG1iq<~
import org.rut.util.algorithm.SortUtil; # >k|^*\
X\`']\l
/** L2>e@p\>
* @author treeroot |Y K,&
* @since 2006-2-2 &{e ]S!D
* @version 1.0 ulxlh8=
*/ U;W9`JT<.f
public class HeapSort implements SortUtil.Sort{ nF'YG+;|@
pq`uB
/* (non-Javadoc) ,NQ!d4~D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) igo9~.
*/ t,r]22I,`
public void sort(int[] data) { 2PAu>}W*
MaxHeap h=new MaxHeap(); `,'/Sdr
h.init(data); SOI=~BGd)
for(int i=0;i h.remove(); ?Kgb-bXB
System.arraycopy(h.queue,1,data,0,data.length); TVcA%]y{;
} E!ndXz 59
7?yS>(VmT
private static class MaxHeap{ K T0t4XPM
Go{,< gm
void init(int[] data){ fJlNxdVr
this.queue=new int[data.length+1]; n5=U.r
for(int i=0;i queue[++size]=data; p{5m5x
fixUp(size); Zp)=l Td
} $w*L' <
} 4|K\pCw
UF7h{V})
private int size=0; f|,Kh1{e
2]vTedSOl
private int[] queue; %)7t2D
HaVhdv3L
public int get() { jMn,N9Mf
return queue[1]; SAdT#0J
} s$Vv
}. &ellNQ
public void remove() { U${W3Ra
SortUtil.swap(queue,1,size--); hnFpC1TO
fixDown(1); lQ?jdi
} Wu 0:X*>}p
file://fixdown _Gq6xv\b1
private void fixDown(int k) { &B&8$X
int j; !hq2AY&H)
while ((j = k << 1) <= size) { Rq}lW.<r
if (j < size %26amp;%26amp; queue[j] j++; {3x>kRaKci
if (queue[k]>queue[j]) file://不用交换 l L;5*@
break; Nbr$G=U
SortUtil.swap(queue,j,k); Ms|c"?se
k = j; Qn8xe,
} I]C Y>'
} 3aq'JVq
private void fixUp(int k) { 0o+Yjg>\~8
while (k > 1) { o=R(DK# U
int j = k >> 1; R`<^/h
if (queue[j]>queue[k]) b;b,t0wS
break; bVUIeX'
SortUtil.swap(queue,j,k); n/skDx TE
k = j; #B5,k|"/,M
} o{y}c->
} Wa|V~PL+T
d9$RmCHe}
} J[<Zy^"Y;
w*6b%h%ww
} 74M9z
l$/pp
SortUtil： $ztsbV}
v\,N"X(,
package org.rut.util.algorithm; E<\$3G-do
h&i*=&<HP6
import org.rut.util.algorithm.support.BubbleSort; yIL=jzm`7
import org.rut.util.algorithm.support.HeapSort; cuN]}=D
import org.rut.util.algorithm.support.ImprovedMergeSort; zzZEX
import org.rut.util.algorithm.support.ImprovedQuickSort; tfU*U>j
import org.rut.util.algorithm.support.InsertSort; P)K$+oo
import org.rut.util.algorithm.support.MergeSort; ]QaKXg)3q
import org.rut.util.algorithm.support.QuickSort; ^+76^*0
import org.rut.util.algorithm.support.SelectionSort; e>z"{ u(F0
import org.rut.util.algorithm.support.ShellSort; :rL%,o"
2#7|zhgb
/** Zkd{EMW
* @author treeroot \o!3TK"N
* @since 2006-2-2 #`u}#(
* @version 1.0 gko=5|c,@
*/ lndz
public class SortUtil { N_T5sZ\
public final static int INSERT = 1; ~`AB-0t.u
public final static int BUBBLE = 2; w~u{"E$
public final static int SELECTION = 3; 8Nzn%0(Q
public final static int SHELL = 4; U:TkO=/>:
public final static int QUICK = 5; {T-\BTh&Q
public final static int IMPROVED_QUICK = 6; Qx4)'n
public final static int MERGE = 7; :gV~L3YW5
public final static int IMPROVED_MERGE = 8; kumV|$Y?kA
public final static int HEAP = 9; FY'0?CT$
Q~]oN
public static void sort(int[] data) { ARu_S B
sort(data, IMPROVED_QUICK); s-IE}I?;
} ts~VO`
private static String[] name={ {\(G^B*\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C*2%Ix18+N
}; fi HE`]0
2?~nA2+vm
private static Sort[] impl=new Sort[]{ $YX{gk>
new InsertSort(), :C_/K(Rkl
new BubbleSort(), (C. $w
new SelectionSort(), 1(Is 7
new ShellSort(), nNCR5&,q
new QuickSort(), zgGysjV
new ImprovedQuickSort(), w80X~
new MergeSort(), `Xos]L'w
new ImprovedMergeSort(), dq '2y
new HeapSort() 9}6_B|
}; mEJ7e#
hq7f"`
public static String toString(int algorithm){ G0 EXgq8
return name[algorithm-1]; P7-k!p"
} BsFO]F5mmX
9:{<:1?
public static void sort(int[] data, int algorithm) { I#MPJ@*WT
impl[algorithm-1].sort(data); :Tpf8
} z[f]mU
*W8n8qG%T
public static interface Sort { ZhY{,sy?QO
public void sort(int[] data); 0i\>(o
} 5}G_2<G
]ltCJq
public static void swap(int[] data, int i, int j) { :=hL}(~]
int temp = data; Yd3lL:M
data = data[j]; iTinZ!Ut
data[j] = temp; fJ/INL
} j9k:!|(2'
} 9Vm aB