[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; G>T')A
} l{P\No
int i1=l; __p_8P
int i2=mid+1; V'Qn sI
for(int cur=l;cur<=r;cur++){ km:nE: |
if(i1==mid+1) H L<s@kEZ
data[cur]=temp[i2++]; tn/T6C^)
else if(i2>r) WVkR56
data[cur]=temp[i1++]; iO!6}yJ*V
else if(temp[i1] data[cur]=temp[i1++]; ++[5q+b
else d]0a%Xh[
data[cur]=temp[i2++]; W( *V2<$o
} Em13dem
} N~=A
myQ&%M gx
} IGj`_a
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改进后的归并排序: (UEXxUdQ_Q
]!YtH]}
package org.rut.util.algorithm.support; sCH)gr@gJ^
v.Ogf5
import org.rut.util.algorithm.SortUtil; H D/5!d
FQeYx-7
/** XOb}<y)r~
* @author treeroot /jD-\,:L}
* @since 2006-2-2 i4Z4xTn
* @version 1.0 >tRHNB_
*/ i6no;}j
public class ImprovedMergeSort implements SortUtil.Sort { nl/UdgI
"c`xH@D
private static final int THRESHOLD = 10; ~krS#\
z>vtEV))
/* +6W(z3($
* (non-Javadoc) >`V}U*}*H
* e`UQz$4!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ef7:y|?
*/ `U`#I,Ln[
public void sort(int[] data) { c5i%(!>
int[] temp=new int[data.length]; ,axDMMDI
mergeSort(data,temp,0,data.length-1); _Sj}~H
} ;q#]-^
SHdL/1~t
private void mergeSort(int[] data, int[] temp, int l, int r) { b#Kq[}
int i, j, k; (wt+`_6
int mid = (l + r) / 2; yFIIX=NC
if (l == r) W=-|`
return; OHp5z? z
if ((mid - l) >= THRESHOLD) R"6;NPeo
mergeSort(data, temp, l, mid); 2z2`
else |w)5;uQ&\
insertSort(data, l, mid - l + 1); 2wh#$zGy
if ((r - mid) > THRESHOLD) setLdEi
mergeSort(data, temp, mid + 1, r); o$_93<zc
else cqL(^R.
insertSort(data, mid + 1, r - mid); E'dX)J9e$/
6* rcR]
for (i = l; i <= mid; i++) { )&1!xF
temp = data; RR25Q.c
} r4knN 2:
for (j = 1; j <= r - mid; j++) { f{Qp
temp[r - j + 1] = data[j + mid]; ]W9B6G_
} 4~u9B/v
int a = temp[l]; G!-J$@P
int b = temp[r]; 13f<0wg
for (i = l, j = r, k = l; k <= r; k++) { lH1g[ ))
if (a < b) { ()|3
data[k] = temp[i++]; Enj_tJs
a = temp; .|]IwyD &
} else { $B _Nc*_e
data[k] = temp[j--]; SPwPCI1?
b = temp[j]; 6$e]i|e
} (r F?If
} d/j@_3'
} 5:gj&jt;)7
jUY+3"?
/** ( tn< VK.
* @param data h`?k.{})M
* @param l !$kR ;Q"/
* @param i jXcNAl
*/ xdF guV8
private void insertSort(int[] data, int start, int len) { ,{<Fz%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ToU.mM?f^
} #8?^C]*{0
} };SV!'9s?~
} vl5){@
} sd!sus|( R
"3y}F
堆排序： k,_i#9X
YN#XmX%
package org.rut.util.algorithm.support; :WX0,-Gn
!C`20,U
import org.rut.util.algorithm.SortUtil; +i)AS0?d
nPf'ee
/** ,f<B}O
* @author treeroot ^ KAG|r9
* @since 2006-2-2 (+MC<J/i
* @version 1.0 f)Y
*/ VD;j[~/Z
public class HeapSort implements SortUtil.Sort{ #]zhZW4
W8* 2;F]
/* (non-Javadoc) BJIQ zn3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0zV 4`y
*/ |cu`f{E2]
public void sort(int[] data) { oyQ0V94j
MaxHeap h=new MaxHeap(); /.ZaE+
h.init(data); 'G Y/Q5
for(int i=0;i h.remove(); 8A/>JD3^
System.arraycopy(h.queue,1,data,0,data.length); ;Q90Y&{L=$
} TcZN%
*gSO&O=
private static class MaxHeap{ r<_2qICgP
"^"'uO$
void init(int[] data){ csvOg[
this.queue=new int[data.length+1]; 1ZNNsB
for(int i=0;i queue[++size]=data; FNJ!IkuR
fixUp(size); !3x*k;0
} ewQe/Fq
} k`@w(HhS
sRi%1r7
private int size=0; + (=I8s/
5mIXyg 0:
private int[] queue; '>]&rb09|
A;t zRe
public int get() { }} #be
return queue[1]; -$L(y@%X^
} X7&U3v
@ RX`>r{_
public void remove() { |D(&w+(
SortUtil.swap(queue,1,size--); {Y"8~
fixDown(1); ||fvKyKW>
} Q 3X
file://fixdown m+7`\|`jQ
private void fixDown(int k) { q\_DJ)qpn
int j; <i7agEdZD
while ((j = k << 1) <= size) { `U#Po_hq
if (j < size %26amp;%26amp; queue[j] j++; WVkG2
if (queue[k]>queue[j]) file://不用交换 %^U"Spv;
break; "uS7PplyO
SortUtil.swap(queue,j,k); EqQ3=XMUL@
k = j; 3.~h6r5-
} 9 P~d:'Ib
} xH@'H?
private void fixUp(int k) { tx)OJY
while (k > 1) { G{O\)gf
int j = k >> 1; MC6)=0:KX
if (queue[j]>queue[k]) DUo0w f#D^
break; N*':U^/t4J
SortUtil.swap(queue,j,k); j88=f#<
k = j; 3B -NYJa
} xfes_v""
} Ff&R0v
)O -cw7 >
} 26}u4W$
j$0zD:ppW
} j`hNZ%a
R9q0,yQW
SortUtil： ;x16shH
!c."
package org.rut.util.algorithm; <L2GUX36#
-O /T?H
import org.rut.util.algorithm.support.BubbleSort; "Whwc
import org.rut.util.algorithm.support.HeapSort; 9PCa*,
import org.rut.util.algorithm.support.ImprovedMergeSort; q /:T1a7!
import org.rut.util.algorithm.support.ImprovedQuickSort; >*{:l,LH
import org.rut.util.algorithm.support.InsertSort; |yU3Kt
import org.rut.util.algorithm.support.MergeSort; sU0Stg8&b
import org.rut.util.algorithm.support.QuickSort; hw|t8 ShW
import org.rut.util.algorithm.support.SelectionSort; cp|:8 [
import org.rut.util.algorithm.support.ShellSort; n{z8Ao%
q>P[nz%
/** S_j1=6#^
* @author treeroot IY03"
* @since 2006-2-2 !6{Jq]
* @version 1.0 j7,13,t1-
*/ '#KA+?@
public class SortUtil { eL_^: -
public final static int INSERT = 1; Jxf}b}^T
public final static int BUBBLE = 2; %B0w~[!4}
public final static int SELECTION = 3; |FjBKj
public final static int SHELL = 4; s9G)Bd 8
public final static int QUICK = 5; oFb\TiLu
public final static int IMPROVED_QUICK = 6; &b!vWX1N
public final static int MERGE = 7; L2<+#O#
public final static int IMPROVED_MERGE = 8; Mc!2mE%47m
public final static int HEAP = 9; ),MU+*`
QYH."7X >
public static void sort(int[] data) { tz"5+uuu
sort(data, IMPROVED_QUICK); (;C$gnr.C
} 2c"/QT
private static String[] name={ '1Y<RD>x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T<XfZZ)l<`
}; 8F\~Wz7K
m'3OGvd
private static Sort[] impl=new Sort[]{ [#7D~Lx/
new InsertSort(), F68},N>vr@
new BubbleSort(), ruzMag)
new SelectionSort(), "-28[a3q
new ShellSort(), T\)dt?Tv#\
new QuickSort(), 5"$e=y/
new ImprovedQuickSort(), G 2!}R
new MergeSort(), ypgliq(
new ImprovedMergeSort(), IN<:P
new HeapSort() >G<4Ro"
}; f_~}X#._
LgO i3
public static String toString(int algorithm){ J1nXAh)J
return name[algorithm-1]; 'w'Dwqhmr
} U 7EHBW
H]VsOr
public static void sort(int[] data, int algorithm) { fYb KmB
impl[algorithm-1].sort(data); sN"p5p
} VtD@&N
/L)?> tg
public static interface Sort { qwL0~I
public void sort(int[] data); Nz3zsP$
} sWp{Y.
f%vHx,
public static void swap(int[] data, int i, int j) { l#tS.+B7
int temp = data; "L ^TT2
data = data[j]; 0W;q!H[G
data[j] = temp; *iPs4Es-
} ,:c:6Y^
} 6.k^m&-A