[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; >R{qESmP=
} 1 Q-bYJG
int i1=l; 8l?piig#
int i2=mid+1; B<8N96fx
for(int cur=l;cur<=r;cur++){ %S` v!*2
if(i1==mid+1) Q(d9n8
data[cur]=temp[i2++]; oBq 49u1
else if(i2>r) q{2I_[p
data[cur]=temp[i1++]; l:6,QaT1
else if(temp[i1] data[cur]=temp[i1++]; @UBjq%z
else ~1m2#>
data[cur]=temp[i2++]; R8L_J6Kpa
} uJR%0E7!
} U`Jy!x2m
.O*bILU
} )4?x5#
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改进后的归并排序: 9jp:k><\(c
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package org.rut.util.algorithm.support; E+"dqSI/v
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import org.rut.util.algorithm.SortUtil; ]Fvm 7V
H_!4>G@
/** O?8Ni=]
* @author treeroot Nfe>3uQK
* @since 2006-2-2 $I#q
* @version 1.0 8;y&Pb~)
*/ rV({4cIe9R
public class ImprovedMergeSort implements SortUtil.Sort { f\;65k_jq
f"7M^1)h2%
private static final int THRESHOLD = 10; Z34Wbun4
KV|}#<dD
/* )2UZ% ?V#
* (non-Javadoc) 2Nxm@B` {
* :{'k@J"|a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U7xmC
*/ qjJBcu_C'S
public void sort(int[] data) { }pkj:NT
int[] temp=new int[data.length]; 3ZTE<zRQ
mergeSort(data,temp,0,data.length-1); %dErnc$
} Iu~\L0R427
gef6pfV
private void mergeSort(int[] data, int[] temp, int l, int r) { `G1&Z]z
int i, j, k; !|2VWI}
int mid = (l + r) / 2; .t&R>9cZ^
if (l == r) Mfk2mIy
return; T,fI BD:
if ((mid - l) >= THRESHOLD) Tj~IaU
mergeSort(data, temp, l, mid); 9p 4"r^
else Obw?_@X
insertSort(data, l, mid - l + 1); Z3;!l
if ((r - mid) > THRESHOLD) G>YAJo
mergeSort(data, temp, mid + 1, r); (vR 9H(#
else a</D_66
insertSort(data, mid + 1, r - mid); ?Y:x[pOe
\^1+U JU
for (i = l; i <= mid; i++) { L.xZ_ 6
temp = data; _<$>*i R
} krq/7|
for (j = 1; j <= r - mid; j++) { Z'^U ad6
temp[r - j + 1] = data[j + mid]; ?::NO Dg
} w(L>#?
int a = temp[l]; ^1:U'jIXO
int b = temp[r]; oIGrA-T}
for (i = l, j = r, k = l; k <= r; k++) { ~zm7?_"@]
if (a < b) { jUj<~:Q}3o
data[k] = temp[i++]; TGuiNobD
a = temp; 2=-utN@Z
} else { m6eZ_&+u
data[k] = temp[j--]; q0%
b = temp[j]; wn Y$fT9
} D7]#Xk2
} J" j.'.
} c8)/:xxl
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/** &"_u}I&\
* @param data ERUt'1F?]
* @param l kE.x+2
* @param i I O%6 O
*/ dAP|:&y@
private void insertSort(int[] data, int start, int len) { 2LCB])X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9[v1h,L
} C\_zdADUb%
} N_4eM,7t
} 6,1b=2G
} *KK+X07
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堆排序： vgn@d,v
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package org.rut.util.algorithm.support; K\[!SXg@
y AF+bCXo
import org.rut.util.algorithm.SortUtil; ~5ZvOX6L2
sDqe(x}a
/** {qKxz9.y
* @author treeroot eRbGZYrJ
* @since 2006-2-2 ^n#1<K[E
* @version 1.0 ]!:oYAm
*/ s/"&9F3
public class HeapSort implements SortUtil.Sort{ HhA -[p
|VOg\[f
/* (non-Javadoc) D+V7hpH-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mv|ykJoz"
*/ &a!BD/
public void sort(int[] data) { Gy1xG.yM~
MaxHeap h=new MaxHeap(); u^I(Ny
h.init(data); [#" =yzR<3
for(int i=0;i h.remove(); *y`%]Hy<
System.arraycopy(h.queue,1,data,0,data.length); j^`X~gE
} F}J-gZl
/9Q3iV$I]
private static class MaxHeap{ iK;dU2h
+&tgJ07A
void init(int[] data){ Q8p&Ki;i
this.queue=new int[data.length+1]; U]qav,^[
for(int i=0;i queue[++size]=data; Ap&)6g
fixUp(size); J MX6yV
} |1Dc!V'?"
} +i `*lBup$
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private int size=0; '"pd
3[p_!eoW
private int[] queue; 0uVv<Q~
q<e&0u4
public int get() { Vi!Q
return queue[1]; Xog/O i
} Jsg I'
;S$Ll*f>D
public void remove() { 5yh/0i5|
SortUtil.swap(queue,1,size--); \^+ILYO:$
fixDown(1); `|1MlRM9
} ocwG7J\W
file://fixdown N5|Rmfo1
private void fixDown(int k) { y;" n9
int j; 7>o.0
while ((j = k << 1) <= size) { y#ON|c /
if (j < size %26amp;%26amp; queue[j] j++; pl*~kG=
if (queue[k]>queue[j]) file://不用交换 _\5~>g_
break; TL= YQA
SortUtil.swap(queue,j,k); RKd
k = j; ydl jw
} 4kp im
} BOlAm*tFt
private void fixUp(int k) { i< (s}wg
while (k > 1) { QrD o|GtE
int j = k >> 1; t$&Qv)
if (queue[j]>queue[k]) ,lYaA5&I
break; Q+|{Bs)6i1
SortUtil.swap(queue,j,k); k>4qkigjc
k = j; OQ/<-+<w
} ^jdL@#k00
} |wxGpBau
~KjJ\b)R
} ;:&?=d
VBoMT:#
} HCA{pR`
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SortUtil： ~%w~-O2
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package org.rut.util.algorithm; fT:}Lj\L1
PsjbR
import org.rut.util.algorithm.support.BubbleSort; ]*"s\ix
import org.rut.util.algorithm.support.HeapSort; XY7Qa!>7j
import org.rut.util.algorithm.support.ImprovedMergeSort; Ar9nBJ`
import org.rut.util.algorithm.support.ImprovedQuickSort; x FJg
import org.rut.util.algorithm.support.InsertSort; F SMj
import org.rut.util.algorithm.support.MergeSort; KM?1/KZ/~
import org.rut.util.algorithm.support.QuickSort; 9G?ldp8
import org.rut.util.algorithm.support.SelectionSort; l1_X(Z._V
import org.rut.util.algorithm.support.ShellSort; T~4mQuYi
yT /EHmJ
/** L6:h.1 U$
* @author treeroot qX:B4,|ck
* @since 2006-2-2 ,1n >U?5
* @version 1.0 !jX4`/n2
*/ Y,z??bm~J
public class SortUtil { u.|~
public final static int INSERT = 1; C.a5RF0
public final static int BUBBLE = 2; TT!ET<ciN
public final static int SELECTION = 3; *}b]rjsj
public final static int SHELL = 4; $Ptk|qFe
public final static int QUICK = 5; W+>wu%[L
public final static int IMPROVED_QUICK = 6; BW[5o3 i
public final static int MERGE = 7; =y ]Jl,_.
public final static int IMPROVED_MERGE = 8; mxTk+j=
public final static int HEAP = 9; Ry;$^.7%
Q ~|R Z7G
public static void sort(int[] data) { u/^|XOy
sort(data, IMPROVED_QUICK); )-P!Ae_.v
} #5CI)4x0!
private static String[] name={ dZ2%S''\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7 &)]) {Q
}; >O{7/)gS^
{5:Zl<0
private static Sort[] impl=new Sort[]{ wJ"ev.A)
new InsertSort(), }Ag|gF!_
new BubbleSort(), SQ(apc}N4
new SelectionSort(), J}g~uW
new ShellSort(), y%BX]~
new QuickSort(), O;XG^s@5
new ImprovedQuickSort(), X33v:9=
new MergeSort(), N{akg90
new ImprovedMergeSort(), HQVh+(
new HeapSort() 0A$SYF$O+[
}; oN2=DYC41
iSp
public static String toString(int algorithm){ 9w~cvlv[
return name[algorithm-1]; I=dGq;Jaz
} ?qHF}k|
eMMx8E)B
public static void sort(int[] data, int algorithm) { 4KpL>'Q=
impl[algorithm-1].sort(data); cf8-]G?tK
} h* .w"JO
y%(X+E"n*
public static interface Sort { Ub)I66
public void sort(int[] data); 66:ALFwd7
} s"#]L44N
&~~s6
public static void swap(int[] data, int i, int j) { ~uaP$*B[
int temp = data; Agy <j
data = data[j]; )^;DGzG
data[j] = temp; L@)&vn]
} <)#kq1b?
} U{1z;lJ