[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; N,&bBp
} S>d7q
int i1=l; )qRE['M
int i2=mid+1; !z]{zM%
for(int cur=l;cur<=r;cur++){ %]o/p_<
if(i1==mid+1) &jh17y
data[cur]=temp[i2++]; `_OB_F
else if(i2>r) 4XSq\.@G
data[cur]=temp[i1++]; eRg;)[#0>$
else if(temp[i1] data[cur]=temp[i1++]; U/-|hfh
else R+9 hog
data[cur]=temp[i2++]; k>:\4uI|<\
} SOluTFxUw
} vtRz;~,Z
zT'(I6S:)
} XLlJ|xhY-K
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改进后的归并排序: VYQ]?XF3i
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package org.rut.util.algorithm.support; .+~9 vH
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import org.rut.util.algorithm.SortUtil; H5be5
C-/+n5J
/** Sre:l'.
* @author treeroot )O>M~
* @since 2006-2-2 1|$J>
* @version 1.0 Lv *USN
*/ SGpe\P]k
public class ImprovedMergeSort implements SortUtil.Sort { K~~LJU3
/pJr%}sc
private static final int THRESHOLD = 10; R4S))EHg
UK.=Y9
/* }S}%4c>
* (non-Javadoc) -$`q:j
* 0"iQHi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2nSK}q
*/ eH%i8a
public void sort(int[] data) { y_T%xWK5
int[] temp=new int[data.length]; BfQ#5
mergeSort(data,temp,0,data.length-1); 0,6!6>BOT
} wIF)(t-):
b2~5LZ
private void mergeSort(int[] data, int[] temp, int l, int r) { <@;bxSUx
int i, j, k; _$KkSMA~_
int mid = (l + r) / 2; ;.7]zn.X]2
if (l == r) w} r mYQ
return; J,k.*t:
if ((mid - l) >= THRESHOLD) #,OiZQJC
mergeSort(data, temp, l, mid); i"n1E@
else sfsK[c5bm
insertSort(data, l, mid - l + 1); 9-y<= )
if ((r - mid) > THRESHOLD) Xet} J@C
mergeSort(data, temp, mid + 1, r); T^Hq 5Oy
else ?]>;Wr
insertSort(data, mid + 1, r - mid); R_#k^P^
,n$HTWa@0
for (i = l; i <= mid; i++) { 9<5ii
temp = data; h#uk-7
} Cm-dos
for (j = 1; j <= r - mid; j++) { h2 >a_0"
temp[r - j + 1] = data[j + mid]; MF+F8h>/
} x/%/MFK)>8
int a = temp[l]; _;:B@Z
int b = temp[r]; ^vTp.7o~5
for (i = l, j = r, k = l; k <= r; k++) { .xtam 8@
if (a < b) { 4!Lj\.!$
data[k] = temp[i++]; * K0aR!
a = temp; 2 y&k
} else { f5'vjWJ30
data[k] = temp[j--]; :*J!
b = temp[j]; +<WNAmh
} Z;6?,5OSc
} `(~oZbErM
} 4cDe'9 LA
b>nwX9Y/U
/** T|uG1
* @param data _"82W^Wi
* @param l ZJHaY09N
* @param i m2Wi "X(I_
*/ B8zc#0!1
private void insertSort(int[] data, int start, int len) { `bZgw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^C;ULUn3
} |43Oc:Ah+
} i \@a&tw
} D*ZswHT{y
} KqXPxp^_Al
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堆排序： iL'j9_w,
_:!7M^IU
package org.rut.util.algorithm.support; Bu4@FIK!C
j_SUR)5
import org.rut.util.algorithm.SortUtil; ]m#*4
v+'*.Iv:
/** ubl)$jZ:Q
* @author treeroot _Pn 1n
* @since 2006-2-2 (ZQ?1Qxo
* @version 1.0 RHmT$^=
*/ \ F)}brPc
public class HeapSort implements SortUtil.Sort{ P3TM5
TmJXkR.5
/* (non-Javadoc) )&ucX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H_w?+Rig
*/ ZN!<!"~
public void sort(int[] data) { {}BAQ9|q
MaxHeap h=new MaxHeap(); 3lN@1jlh
h.init(data); l_P90zm39!
for(int i=0;i h.remove(); U"L-1]L
System.arraycopy(h.queue,1,data,0,data.length); l_zTpyOZ
} 0m4'm<2m
Tj!rAMQk
private static class MaxHeap{ A&X XL~yH
8*&YQId~
void init(int[] data){ ,Eo\(j2F.
this.queue=new int[data.length+1]; (SByN7[gb
for(int i=0;i queue[++size]=data; J#\oc@
fixUp(size); W4)bEWO+q
} yn.[-
} TpxAp',#7
X5+$:jq&
private int size=0; ix5<h }
Twk<<
private int[] queue; d1 lxz?r
40 zO4
public int get() { mcxD#+H 3
return queue[1]; ,?wxW
} $5>m\wrl
_Zxo<}w}y
public void remove() { >".@;
SortUtil.swap(queue,1,size--); -cP1,>Ahv
fixDown(1); 0+AMN-
} N\Ab0mDOV.
file://fixdown z</^qy
private void fixDown(int k) { 0R}hAK+| 4
int j; kv<(N
while ((j = k << 1) <= size) { Asj<u!L
if (j < size %26amp;%26amp; queue[j] j++; j? Vs"d|
if (queue[k]>queue[j]) file://不用交换 ts r{-4V
break; o+Q2lO5
SortUtil.swap(queue,j,k); aTs9lr:
k = j; )*aAkM
} :)%cL8Nz]$
} Yh{5O3(;
private void fixUp(int k) { $ SZIJe"K
while (k > 1) { <Ik5S1<h$H
int j = k >> 1; dcfwUjp[
if (queue[j]>queue[k]) Jv!f6*&<
break; gwFW+*h
SortUtil.swap(queue,j,k); 6xu%M&ht
k = j; OXbC\^qo@
} *?+2%zP
} N:,V{Pw
im F,8'
} 6rlvSdB
]hZk#rp}
} GK#D R/OM
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SortUtil： ,Qj\_vr@
olK*uD'`
package org.rut.util.algorithm; 9fsc>9
Z 4c^6v
import org.rut.util.algorithm.support.BubbleSort; 7H4kj7UK
import org.rut.util.algorithm.support.HeapSort; \jAI~|3
import org.rut.util.algorithm.support.ImprovedMergeSort; ,C|aiSh0-
import org.rut.util.algorithm.support.ImprovedQuickSort; )))AxgM
import org.rut.util.algorithm.support.InsertSort; qos/pm$&i
import org.rut.util.algorithm.support.MergeSort; ~w(A3I.
import org.rut.util.algorithm.support.QuickSort; W >|'4y)
import org.rut.util.algorithm.support.SelectionSort; Sp]ov:]%f
import org.rut.util.algorithm.support.ShellSort; Y@+9Ukd/
[YJ*zO
/** u\km_e
* @author treeroot U@:l~xJ
* @since 2006-2-2 /9| 2uw`
* @version 1.0 _S CY e
*/ #;UoZJ B
public class SortUtil { WN o+%
public final static int INSERT = 1; (@S9>z4s
public final static int BUBBLE = 2; |I3&a=,
public final static int SELECTION = 3; ,<[x9 "3\
public final static int SHELL = 4; TJuS)AZ C
public final static int QUICK = 5; /mwDVP<z /
public final static int IMPROVED_QUICK = 6; S5~(3I )v
public final static int MERGE = 7; GqgJ]m
public final static int IMPROVED_MERGE = 8; e'|c59E
public final static int HEAP = 9; a&[>kO
]NKz5[9D
public static void sort(int[] data) { EW/NH&{
sort(data, IMPROVED_QUICK); 'lmjZ{k
} epcvwM/A
private static String[] name={ P#"_H}qC*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T7N\b]?j@Y
}; _,w*Rv5=
FPEab69
private static Sort[] impl=new Sort[]{ Ad4-aWH
new InsertSort(), ,/[1hhP@
new BubbleSort(), Ld=6'C8ud
new SelectionSort(), x[$:^5V
new ShellSort(), ]Nue1xV_
new QuickSort(), i'}"5O+
new ImprovedQuickSort(), VYrs4IFT$
new MergeSort(), A$?o3--#]G
new ImprovedMergeSort(), TBgiA}|\D
new HeapSort() ?yA 2N;
}; _V` QvnT}
~L.5;8a3Pe
public static String toString(int algorithm){ ZQmg;L&7
return name[algorithm-1]; &+/$~@OK
} Zm#,Ike?#
'@"A{mrE
public static void sort(int[] data, int algorithm) { 51'V[tI;8
impl[algorithm-1].sort(data); LtNspFoLb
} SA [(1dy;
B'6(Ao=3/
public static interface Sort { 9W j9=
public void sort(int[] data); %t$)sg]
} #:Ukv?
{3 >`k.w
public static void swap(int[] data, int i, int j) { w# ;t$qz}
int temp = data; l!IN#|{(
data = data[j]; Ub[UB%(T
data[j] = temp; OO;I^`Yn
} o^u}(wZ{
} =E&1e;_xlE