[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; Ko&>C_N
} W^]3XJP
int i1=l; $}jssnoU
int i2=mid+1; "huFA|`
for(int cur=l;cur<=r;cur++){ _J? Dq
if(i1==mid+1) Ou1JIxZ)|
data[cur]=temp[i2++]; [3--(#R\}?
else if(i2>r) R]btAu;Z
data[cur]=temp[i1++]; 3YFU*f,
else if(temp[i1] data[cur]=temp[i1++]; !qN||mCH
else eK!V );
data[cur]=temp[i2++]; J_v$YwE
} }XSfst5-H
} ~;&m*2 |V
9uBM<
} x"{'&J[hx
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改进后的归并排序: x`dHJq`_g
+[tE^`-F
package org.rut.util.algorithm.support; Y5FbU
A' /KUi
import org.rut.util.algorithm.SortUtil; :E@3Vl#U
g;8jK8Kh
/** x\s|n{
* @author treeroot /i-J&*6_
* @since 2006-2-2 T|dY 2
* @version 1.0 `P8Vh+7u
*/ 6^"=dn6K
public class ImprovedMergeSort implements SortUtil.Sort { [5MJwRM^!;
U]vYV
private static final int THRESHOLD = 10; )Ib<F7v
Z<SLc,]^
/* KB'qRnkc
* (non-Javadoc) EVVP]ND
* /`6ZAom9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tp-l^?O-p
*/ Yl#Rib
public void sort(int[] data) { bV$)!]V
int[] temp=new int[data.length]; jlBanGs?
mergeSort(data,temp,0,data.length-1); ~YRDyQ:%T
} k25WucQ
8&3V#sn'
private void mergeSort(int[] data, int[] temp, int l, int r) { %_{tzXim
int i, j, k; ""1^k2fj
int mid = (l + r) / 2; bLQ ^fH4ww
if (l == r) ?F6pEt4
return; &b?LP]
if ((mid - l) >= THRESHOLD) 'eJ+JM<0%
mergeSort(data, temp, l, mid); PG_0\'X)/w
else Jnna$6G)B
insertSort(data, l, mid - l + 1); u9}1)9
if ((r - mid) > THRESHOLD) y7$iOR
mergeSort(data, temp, mid + 1, r); k7>|q"0C
else & M~`:R
insertSort(data, mid + 1, r - mid); HKqwE=NZ
YE=q:Bv
for (i = l; i <= mid; i++) { %ix)8+Eb
temp = data; }*ZHgf]~#
} 3v mjCm
for (j = 1; j <= r - mid; j++) { Qum9A
temp[r - j + 1] = data[j + mid]; +H9>A0JF
} q&Gz ]
int a = temp[l]; m5X3{[a:
int b = temp[r]; wy,Jw3
for (i = l, j = r, k = l; k <= r; k++) { f0/jwfL
if (a < b) { ?(fQ<i n
data[k] = temp[i++]; E}]I%fi
a = temp; p.@0=)
} else { X!,#'&p&
data[k] = temp[j--]; [B}1z
b = temp[j]; QpdujtH`
} _L?v6MTj
} Aqa6R+c
} J ZVr&KZN
u^}7Vs .
/** &?KPu?9
* @param data cYZwWMzp
* @param l JVD@I{
* @param i JN{<oxI
*/ ybD{4&ZE
private void insertSort(int[] data, int start, int len) { v(qV\:s}m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Py|H? ,6=
} P3+)pOE-SI
} &Pmc"9Rl
} lAdOC5+JX
} T [T6
hg%@W
堆排序： u3Zzu\{
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package org.rut.util.algorithm.support; &/B2)l6a
hg[l{)Q
import org.rut.util.algorithm.SortUtil; &,W_#l{
M[:O(
/** y+K7WUwhq
* @author treeroot qWRNHUd
* @since 2006-2-2 ^tm++
* @version 1.0 *23m-
*/ [<#<:h&\
public class HeapSort implements SortUtil.Sort{ (t]lP/
Eg@R[ ^T
/* (non-Javadoc) qPFG+~\c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bxn8><
*/ Rz<d%C;R
public void sort(int[] data) { kWZ/ej
MaxHeap h=new MaxHeap(); ,^MW)Gf<
h.init(data); 6Nfof
for(int i=0;i h.remove(); $$2S*qY
System.arraycopy(h.queue,1,data,0,data.length); n:5O9,umZ
} &+E'1h10
2x<Qt2"
private static class MaxHeap{ l}2%?d
2a._?(k_y
void init(int[] data){ XEf&Yd
this.queue=new int[data.length+1]; aBqe+FXp4
for(int i=0;i queue[++size]=data; <|KKv5[
fixUp(size); mV:RmA
} H6%!v1 u
} <FUqD0sQ
j61BP8E
private int size=0; 1jUhG2y
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private int[] queue; ?z)y%`}
w-0O j
public int get() { b2/N H1A
return queue[1]; Y^c,mK^
} [p( #WM:
YA^wUx
public void remove() { c:?#zX
SortUtil.swap(queue,1,size--); p0[,$$pM
fixDown(1); E&iWtwkz
} &J6o$i
file://fixdown F(KH-
private void fixDown(int k) { s%L" c
int j; #FQm/Q<0
while ((j = k << 1) <= size) { <\}Y@g8
if (j < size %26amp;%26amp; queue[j] j++; e\d5SKY
if (queue[k]>queue[j]) file://不用交换 Z!*8JaMT
break; rx}ujjx
SortUtil.swap(queue,j,k); 5,0wj0l
k = j; d}wa[WRv
} yNLa3mW
} s_GK;;
private void fixUp(int k) { -_{C+Y_
while (k > 1) { A<YZBR_
int j = k >> 1; a!0?L0_W&
if (queue[j]>queue[k]) aV?}+Y{#
break; 8H3!; ]
SortUtil.swap(queue,j,k); s!j(nUd/
k = j; +]S;U&vQ
} shDt&_n
} ^7~SS2t!
8JtI&aH-L
} Wy^[4|6
l|ZzG4]+l
} ?(,5eg
#)PGQ)(
SortUtil： w}bEufU+2
DX%8.@
package org.rut.util.algorithm; d,oOn.n&
/ie3H,2
import org.rut.util.algorithm.support.BubbleSort; $Va]vC8?
import org.rut.util.algorithm.support.HeapSort; *nsnX/e(-
import org.rut.util.algorithm.support.ImprovedMergeSort; )HzITsFZKT
import org.rut.util.algorithm.support.ImprovedQuickSort; eX l%Qs#Y
import org.rut.util.algorithm.support.InsertSort; 7u`}t83a
import org.rut.util.algorithm.support.MergeSort; , R.+-X
import org.rut.util.algorithm.support.QuickSort; ,I2reG
import org.rut.util.algorithm.support.SelectionSort; YW$x:
import org.rut.util.algorithm.support.ShellSort; soqNzdTB2
>Dp6@%
/** Za:BJ:
* @author treeroot 7ck0S+N'b
* @since 2006-2-2 zy/tQGTr@
* @version 1.0 ILr6W@o5A
*/ >e$^#\D
public class SortUtil { bZOy~F|
public final static int INSERT = 1; (y+5d00
public final static int BUBBLE = 2; [q>i
public final static int SELECTION = 3; MY<!\4/
public final static int SHELL = 4; 0p>:rU~
public final static int QUICK = 5; h$ETH1Ue
public final static int IMPROVED_QUICK = 6; HyX4ob[X
public final static int MERGE = 7; E]eqvTNH
public final static int IMPROVED_MERGE = 8; <C.$Db&9
public final static int HEAP = 9; dpGQ0EzH^
W'2-3J
public static void sort(int[] data) { N>6yacTB
sort(data, IMPROVED_QUICK); Znl>*e/|
} :{N3o:
private static String[] name={ ! ?U^+)^$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HH~ du
}; p4t!T=o/
d$pf[DJQo
private static Sort[] impl=new Sort[]{ 7E75s)KH
new InsertSort(), hPXVPLm7I
new BubbleSort(), p:Ld)U*
new SelectionSort(), $:gSc&mx
new ShellSort(), SSsQu^A
new QuickSort(), !q6V@&
new ImprovedQuickSort(), AGJ=de.
new MergeSort(), )Q
new ImprovedMergeSort(), Y %D*O
new HeapSort() qT>& v_<
}; >RqT7n8h
x<y[na
public static String toString(int algorithm){ L+ETMk0
return name[algorithm-1]; |XdrO
} 0)Xue9AS
_BLSI8!N@
public static void sort(int[] data, int algorithm) { `# M.t);^
impl[algorithm-1].sort(data); yJ`1},^
} JHh9> .1
{_X1&&>8/
public static interface Sort { [BR}4(7
public void sort(int[] data); @?cXa: tX
} H6CGc0NS+
;s B:s9M
public static void swap(int[] data, int i, int j) { i~s9Ot
int temp = data; E?h2e~ ,]
data = data[j]; DHNii_w4v
data[j] = temp; 2#A9D.- h
} iGeT^!N
} "KE38`NL