[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; '!/<P"5t
} KQB3m"
int i1=l; R(q~ -3~
int i2=mid+1; &=VDASEu
for(int cur=l;cur<=r;cur++){ ^R:cd8+?%
if(i1==mid+1) %CK^Si%+
data[cur]=temp[i2++]; ^fZ&QK
else if(i2>r) (sh)TBb5
data[cur]=temp[i1++]; ?@E!u|]K
else if(temp[i1] data[cur]=temp[i1++]; E?_Z`*h
else PLK3v4kVM!
data[cur]=temp[i2++]; dqN5]Sb2B
} RzWXKBI\E]
} w.[ "p9tc
;q*e=[_DF
} M5 <@~V/[
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改进后的归并排序: EK4d_L]I
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package org.rut.util.algorithm.support; V4_=<W
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import org.rut.util.algorithm.SortUtil; 17`1SGZ
~]QHk?[wc
/** /5u<78GW1
* @author treeroot 4O35"1
* @since 2006-2-2 ZMel{w`n
* @version 1.0 +0OLc2 )w
*/ ouuuc9x]
public class ImprovedMergeSort implements SortUtil.Sort { Y'8?.a]'
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private static final int THRESHOLD = 10; DQr Y*nH
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/* lhqg$lb
* (non-Javadoc) abyo4i5T
* {GQ^fu;q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0$ S8fF@
*/ U H*r5o3
public void sort(int[] data) { Eea*s'
int[] temp=new int[data.length]; K~R`%r_
mergeSort(data,temp,0,data.length-1); sG F aL
} <$IM8Y5p+w
EwvoQ$#jv
private void mergeSort(int[] data, int[] temp, int l, int r) { R}!:'^
int i, j, k; 0eDHu
int mid = (l + r) / 2; f=WDR m]
if (l == r) C$XU%5qi
return; ppVHLrUh
if ((mid - l) >= THRESHOLD) $xPaYf
mergeSort(data, temp, l, mid); Xg;}R:g '
else HK2[]G
insertSort(data, l, mid - l + 1); A;]}m8(*
if ((r - mid) > THRESHOLD) }E50>g
mergeSort(data, temp, mid + 1, r); 9,:l8
else kY-N>E:
insertSort(data, mid + 1, r - mid); ;'#8tGv=
n<z[J=I
for (i = l; i <= mid; i++) { `xqr{lhL
temp = data; .uMn0PE
} Q7jb'y$ozO
for (j = 1; j <= r - mid; j++) { Dv5D~on{
temp[r - j + 1] = data[j + mid]; 7o#I,d~
} vunHNHltW0
int a = temp[l]; -z)n?(pftm
int b = temp[r]; $QLcH;+7t
for (i = l, j = r, k = l; k <= r; k++) { UCB/=k^m
if (a < b) { pZqq]mHK
data[k] = temp[i++]; P2#XKG
a = temp; 5K>3My#
} else { =5~jx
data[k] = temp[j--]; O;:mCt _H
b = temp[j]; e> e}vZlX
} R{<kW9!
} $P^q!H4D
} ^ *k?pJ5
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/** D9^h; 8
* @param data *x@Onj
* @param l L*xhGoC=
* @param i D#cyOrzy
*/ RO+GK`J
private void insertSort(int[] data, int start, int len) { ` Mjj@[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %[Wh [zZy
} ayR-\mZ
} n'n/Tu
} xpV|\2C
} /?5 1D@
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堆排序： 89pEfl j2
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package org.rut.util.algorithm.support; *+Ek0M
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import org.rut.util.algorithm.SortUtil; :~"CuB/
c}lb%^;)E
/** +~m46eI
* @author treeroot 5sj4;w[
* @since 2006-2-2 sBj(Qd
* @version 1.0 X`kk]8=
*/ LO9=xGj.
public class HeapSort implements SortUtil.Sort{ eenH0Ovv
KKja/p
/* (non-Javadoc) XKj|f`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W9 GxXPA
*/ X9v.1s,
public void sort(int[] data) { :;t:H] f
MaxHeap h=new MaxHeap(); j/323Za+
h.init(data); ;#g"(
for(int i=0;i h.remove(); + [iQLM?zo
System.arraycopy(h.queue,1,data,0,data.length); M8MRoA6F
} @>r._~
k^3>Y%^1
private static class MaxHeap{ =)0,#9k U]
n,vct<&z@
void init(int[] data){ \:%(q/v"X
this.queue=new int[data.length+1]; <GS^
for(int i=0;i queue[++size]=data; ^bGNq X
fixUp(size); Y071Y:
} [owWiN4`s
} 5kc/Y/4o
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private int size=0; >{q]&}^U
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private int[] queue; l5S aT,%
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public int get() { wL+s8#{
return queue[1]; tURu0`](
} u 1>2v
8}I$'x
public void remove() { b.2aHu( 3
SortUtil.swap(queue,1,size--); +F R0(T
fixDown(1); t|w_i-&b,
} {3|t;ZHk
file://fixdown E-T)*`e
private void fixDown(int k) { L O}@dL
int j; S5gyr&dm
while ((j = k << 1) <= size) { S3q&rqarC%
if (j < size %26amp;%26amp; queue[j] j++; Tm~" IB*
if (queue[k]>queue[j]) file://不用交换 ^=GC3% J
break; Y@;CF
SortUtil.swap(queue,j,k); &C`Gg<
k = j; AFq~QXmr)
} M1k{t%M+S
} Kr?TxhUHd
private void fixUp(int k) { 5#HW2"7
while (k > 1) { iowTLq!?
int j = k >> 1; Gj1&tjK
if (queue[j]>queue[k]) 0\X\izQ5
break; d6Ht2
SortUtil.swap(queue,j,k); h0(BO*cy
k = j; fe\mL mK9
} d2*fLEsF
} X:A^<L ~
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} GB23\Yv
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} LD+{o4i
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SortUtil： TJ2=m9Z
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package org.rut.util.algorithm; >BV^H.SO|1
x) ,eI'mf
import org.rut.util.algorithm.support.BubbleSort; ]3D0R;
import org.rut.util.algorithm.support.HeapSort; b_$4V3TA
import org.rut.util.algorithm.support.ImprovedMergeSort; AiwOc+R
import org.rut.util.algorithm.support.ImprovedQuickSort; tP:lP#9
import org.rut.util.algorithm.support.InsertSort; Uf1!qP/H?
import org.rut.util.algorithm.support.MergeSort; [zH:1Zhl&
import org.rut.util.algorithm.support.QuickSort; ncZ+gzK|"
import org.rut.util.algorithm.support.SelectionSort; ^PDJ0k/u1
import org.rut.util.algorithm.support.ShellSort; 4)S,3G
5[8xV%>;
/** NG=@ -eu
* @author treeroot cutuDZ
* @since 2006-2-2 Q$a{\*[:+
* @version 1.0 +! ]zA4x
*/ DEBB()6,
public class SortUtil { 2bv=N4ly
public final static int INSERT = 1; x!?u^
public final static int BUBBLE = 2; f&=AA@jLv
public final static int SELECTION = 3; XPavReGf
public final static int SHELL = 4; h}>"j%I
public final static int QUICK = 5; >f|||H}Snw
public final static int IMPROVED_QUICK = 6; 1rNzJ;'
public final static int MERGE = 7; =T3<gGM
public final static int IMPROVED_MERGE = 8; |.(dq^
public final static int HEAP = 9; ]Oe2JfJwx
/74QMx?
public static void sort(int[] data) { ;nI] !g:
sort(data, IMPROVED_QUICK); F3y9@dA]
} S50k>_a;
private static String[] name={ OyU5DoDz1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J-[,KME_^
}; l?E{YQq]
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private static Sort[] impl=new Sort[]{ 7!evm;A
new InsertSort(), ntu5{L'8
new BubbleSort(), ADz ^\
new SelectionSort(), fZ6MSAh
new ShellSort(), |5X^u+_
new QuickSort(), jSJqE_1
new ImprovedQuickSort(), y|jl[pyg)
new MergeSort(), [ZNtCnv
new ImprovedMergeSort(), FVMD>=k
new HeapSort() YC*"Thuu
}; lz/8
=h-U
public static String toString(int algorithm){ t0(A4E
return name[algorithm-1]; ZAW^/bo<
} 9#23FK
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public static void sort(int[] data, int algorithm) { 0XOp3
impl[algorithm-1].sort(data); nB_?ckj,
} Vouvr<43o
2VPdw@"~}
public static interface Sort { 55G+;
public void sort(int[] data); ISzqEi
} $6#CqWhI
L,HhbTRca
public static void swap(int[] data, int i, int j) { `A,-@`p
int temp = data; \J4L:.`qS
data = data[j]; t DO=P c
data[j] = temp; <h!_>:2L
} =R^%(Py
} O24m;oHM