[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; Ey&aBYR
} >[a<pm!
int i1=l; o`r(`6@
int i2=mid+1; x|~zHFm6
for(int cur=l;cur<=r;cur++){ PQj<[rY
if(i1==mid+1) 19d6]pJ5
data[cur]=temp[i2++]; VS/;aG$&y
else if(i2>r) `EMi0hm&H
data[cur]=temp[i1++]; +3^NaY`Y
else if(temp[i1] data[cur]=temp[i1++]; NyPd5m:
else %"Db?
data[cur]=temp[i2++]; XrN- 2HTV
} ms~8QL
} SQ#7PKH
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} =3ADT$YHd
z \?UGxu}
改进后的归并排序: W8aU"_
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package org.rut.util.algorithm.support; |pWaBh|r
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import org.rut.util.algorithm.SortUtil; v:d9o.h
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/** j Selop>N
* @author treeroot uu}-"/<~7
* @since 2006-2-2 l C\E
* @version 1.0 W^xZ+]
*/ BXTN>d27
public class ImprovedMergeSort implements SortUtil.Sort { l_+A5Xy
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private static final int THRESHOLD = 10; 5N1 K~".
NfF~dK|
/* o'qm82* =
* (non-Javadoc) If.n(t[M9
* KU2$5[~j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H~m]nV,r
*/ 6ojo##j
public void sort(int[] data) { *]{=8zc2
int[] temp=new int[data.length]; H`D f
mergeSort(data,temp,0,data.length-1); aIu2>
} Vj!WaN_
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private void mergeSort(int[] data, int[] temp, int l, int r) { z~.9@[LG]
int i, j, k; k!13=Gh
int mid = (l + r) / 2; v*L '{3f
if (l == r) ^K*-G@B
return; jYdV?B
if ((mid - l) >= THRESHOLD) X>/K/M
mergeSort(data, temp, l, mid); 4e/cqN6
else r{V.jZ%p'Z
insertSort(data, l, mid - l + 1); 9cOx@c+/
if ((r - mid) > THRESHOLD) 6z]`7`G
mergeSort(data, temp, mid + 1, r); #HDesen
else AP ;*iyQ[
insertSort(data, mid + 1, r - mid); )KE_t^$
Ws>i)6[
for (i = l; i <= mid; i++) { <_f`$z
temp = data; _ _=s'
} 9}XT'+`y
for (j = 1; j <= r - mid; j++) { =phiD&=
temp[r - j + 1] = data[j + mid]; acP ;(t
} k.{G&]r{
int a = temp[l]; LT(?#)D
int b = temp[r]; u#VweXyU
for (i = l, j = r, k = l; k <= r; k++) { Mz}i[|U\
if (a < b) { #4q1{)=
data[k] = temp[i++]; 7*g(@d
a = temp; zf7rF}
} else { TnxU/)
data[k] = temp[j--]; kc|>Q7~{
b = temp[j]; neIy~H_#!
} !?n50
} h=Oh9zsz8
} tgfM:kzw
@LHtt/&
/** Hp*gv/0
* @param data ^ `E@/<w8
* @param l y\@SC\jk|
* @param i 8k%H[Smn:
*/ tnNZ`]qY
private void insertSort(int[] data, int start, int len) { bWUS9WT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]'E}
} -D;lS 6
} &EGY+p|2Y
} j]#wrm
} T[m ~6
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堆排序： CR.bMF}
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package org.rut.util.algorithm.support; .?70=8{
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import org.rut.util.algorithm.SortUtil; 4 ;^g MI9
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/** tb:
* @author treeroot Mo~ki"9.
* @since 2006-2-2 5nY9Ls(e
* @version 1.0 N*HH,m&
*/ |}%(6<
public class HeapSort implements SortUtil.Sort{ ~.iA`${y%
"h QV9 [2\
/* (non-Javadoc) 6xyY+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m\/>C|f\
*/ P4i3y{$V
public void sort(int[] data) { F ZM2
MaxHeap h=new MaxHeap(); R&]c"cO L8
h.init(data); *O!T!J
for(int i=0;i h.remove(); omNpE_
System.arraycopy(h.queue,1,data,0,data.length); ~v^%ze
} }7-7t{G
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private static class MaxHeap{ #_on{I
+}kO;\
void init(int[] data){ ]Jja
this.queue=new int[data.length+1]; 0`V3s]%iu
for(int i=0;i queue[++size]=data; Zlr{L]c
fixUp(size); j!6elzg
} hEVjeC
} 8e]z6:}'E
~?2rGE
private int size=0; @X3 gBGY)
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private int[] queue; E]e,cd
y{@P1{
public int get() { Y;'VosTD
return queue[1]; hN Z4v/
} ;Fx')
JZWgr&O<
public void remove() { W`w5jk'0^=
SortUtil.swap(queue,1,size--); unCt4uX^
fixDown(1); -iY9GN89c
} #;5[('&[
file://fixdown Y1#-^,qg
private void fixDown(int k) { Pd)K^;em
int j; P%.`c?olbs
while ((j = k << 1) <= size) { 3'?h;`v\Lo
if (j < size %26amp;%26amp; queue[j] j++; gJ<@;O8zu0
if (queue[k]>queue[j]) file://不用交换 `G_(xN7O
break; pe\Txg6
SortUtil.swap(queue,j,k); 9(QU2QY
k = j; "bHtf_
} S4#A#a2J
} B rez&3[
private void fixUp(int k) { ,maAw}=
while (k > 1) { Bpk@{E9
int j = k >> 1; 1m&!l6Jk
if (queue[j]>queue[k]) \e`6=Q%
break; X{0ax.
SortUtil.swap(queue,j,k); bs<WH`P
k = j; P@gu~!
} OVDMC4K2z!
} -_y~rx >
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} .Ws iOJU
5QqJI#4~
} +Fu@I{"A
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SortUtil： +Z 93`
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package org.rut.util.algorithm; 3Ew"[FUs
gp#bQ
import org.rut.util.algorithm.support.BubbleSort; ^yn[QWFO
import org.rut.util.algorithm.support.HeapSort; :0J-ek.;
import org.rut.util.algorithm.support.ImprovedMergeSort; N:UDbLjw~
import org.rut.util.algorithm.support.ImprovedQuickSort; ?=/}Ft
import org.rut.util.algorithm.support.InsertSort; qB+:#Yrx/
import org.rut.util.algorithm.support.MergeSort; q;1VF;<"vH
import org.rut.util.algorithm.support.QuickSort; +XU$GSw3(
import org.rut.util.algorithm.support.SelectionSort; #Qtg\X
import org.rut.util.algorithm.support.ShellSort; |x _-I#H
9 NGeh*`
/** beN>5coP%A
* @author treeroot OH-~
* @since 2006-2-2 H3p4,Y}'#
* @version 1.0 tj"v0u?zW
*/ ]X>QLD0W
public class SortUtil { aIzp\$NWVK
public final static int INSERT = 1; +LQs.*
public final static int BUBBLE = 2; nJ'>#9~a'>
public final static int SELECTION = 3; 9sfB+]}h
public final static int SHELL = 4; +(I`@5
public final static int QUICK = 5; Hnd9T(UB
public final static int IMPROVED_QUICK = 6; ijZydn
public final static int MERGE = 7; Z3X&<Y5
public final static int IMPROVED_MERGE = 8; ch)Ps2i
public final static int HEAP = 9; i-i}`oN
HggR=>s
public static void sort(int[] data) { 2-cU -i4
sort(data, IMPROVED_QUICK); B>p0FQ.
} yVmtsQ-}a
private static String[] name={ "a0u-}/D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7(|3 OR+
}; iS:PRa1
XoH[MJC
private static Sort[] impl=new Sort[]{ <u x*r#a!d
new InsertSort(), 2d>d(^
new BubbleSort(), TQ5MKqR$
new SelectionSort(), SSL%$:l@
new ShellSort(), RV#uy]
new QuickSort(), {g!exbVf
new ImprovedQuickSort(), Oc"'ay(g
new MergeSort(), jnU*l\,
new ImprovedMergeSort(), >arO$|W
new HeapSort() |4p<T!T
}; aoakTi!}
02# b:
public static String toString(int algorithm){ 9 .&Or4>
return name[algorithm-1]; $D, wO
} o+X'(!Trw
yZ?_q$4kEI
public static void sort(int[] data, int algorithm) { \MFWK#W
impl[algorithm-1].sort(data); ^7s6J{<
} #*>7X>,J
_OknP2E
public static interface Sort { xV n]m9i
public void sort(int[] data); 1n"+~N^\
} 8O.:3%D~ t
vRb(eg
public static void swap(int[] data, int i, int j) { IYM@(c@ld0
int temp = data; ,QHx*~9
data = data[j]; )q]j?Z.
data[j] = temp; &;@b&p+
} l=-dK_I?
} P B6/<n9#