[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; n8dJ6"L<"
} >ARZ=x[
int i1=l; +KzbaBK
int i2=mid+1; `,O#r0m
for(int cur=l;cur<=r;cur++){ c6@7>PM
if(i1==mid+1) %gb4(~E+N
data[cur]=temp[i2++]; 1K`7
else if(i2>r) z9B""ws
data[cur]=temp[i1++]; bkvm-$/
else if(temp[i1] data[cur]=temp[i1++]; ^-&BGQM
else PS=N]e7k'
data[cur]=temp[i2++]; 4|#@41\ B
} jrKRXS
} UbnX%2TW
Hido[
} &# ?2zbZ
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改进后的归并排序: $xK2M
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package org.rut.util.algorithm.support; $gv3Up"U
9 Y-y?Y
import org.rut.util.algorithm.SortUtil; J:!m49fF
p!OCF]r
/** abW[hp
* @author treeroot ruKm_j#J
* @since 2006-2-2 +=:*[JEK,U
* @version 1.0 pp2,d`01[L
*/ RiPxz=kr
public class ImprovedMergeSort implements SortUtil.Sort { !)1gGXRY
M:9 6QM~
private static final int THRESHOLD = 10; {%"n[DLps
$q iY)RE
/* pr) `7VuKp
* (non-Javadoc) R'udC}
* !pqfx93R*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XDtMFig
*/ fK %${
public void sort(int[] data) { uSl&d
int[] temp=new int[data.length]; u3B[1Ae:K
mergeSort(data,temp,0,data.length-1); YXi'^GU@
} UBm L:Qv
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private void mergeSort(int[] data, int[] temp, int l, int r) { dx&!RK+
int i, j, k; P"%QFt,
int mid = (l + r) / 2; e` QniTkT
if (l == r) .T63:
return; =1vl-*uYh
if ((mid - l) >= THRESHOLD) WEnI[JGe
mergeSort(data, temp, l, mid); {PTB]D'
else L2,.af6+
insertSort(data, l, mid - l + 1); Ki,SFww8r
if ((r - mid) > THRESHOLD) >]!8f?,
mergeSort(data, temp, mid + 1, r); cUH.^_a
else ,'nd~{pX"(
insertSort(data, mid + 1, r - mid); wOLDHg_
VbG#)>"F
for (i = l; i <= mid; i++) { ieL7jN,'m
temp = data; ]VCVV!G_=n
} 9Ev<t\B
for (j = 1; j <= r - mid; j++) { 5Qh$>R4!"
temp[r - j + 1] = data[j + mid]; VK]cZ%)
} [B,w\PLub
int a = temp[l]; l+vD`aJ3
int b = temp[r]; wqnHaWd*
for (i = l, j = r, k = l; k <= r; k++) { 6${=N}3Kw
if (a < b) { ^vHh*Ub
data[k] = temp[i++]; MP3Vo|}3
a = temp; ,l47;@kr
} else { =<;C5kSD
data[k] = temp[j--]; cEK<CV
b = temp[j]; `B A'a" $
} F{*h~7D-|
} s;ivoGe}
} &}y?Lt
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/** a$AR
* @param data ++=f7yu
* @param l vmj'X>Q
* @param i li37*
*/ [pRRBMho
private void insertSort(int[] data, int start, int len) { wU5.t-|`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cp)BPg
} */6lyODf
} TFAd
} 3cA'9
} * @=ZzL
!\}X?Gf
堆排序： B" 0a5-pkr
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package org.rut.util.algorithm.support; H,3WdSL`K
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import org.rut.util.algorithm.SortUtil; rHa*WA;TE
z@21Z`,
/** L+X:M/)
* @author treeroot )vsX (/WU
* @since 2006-2-2 <0!O'" "J
* @version 1.0 YctWSfh
*/ 9Rm\@E [
public class HeapSort implements SortUtil.Sort{ I !J'
jf^BEz5
/* (non-Javadoc) EvKzpxCh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X=KC+1e
*/ W8_$]}G8E
public void sort(int[] data) { mz|p=[lR|
MaxHeap h=new MaxHeap(); j>`-BN_
h.init(data); ~Jh1$O,9o
for(int i=0;i h.remove(); 3OB=D{$V
System.arraycopy(h.queue,1,data,0,data.length); x:6c@2
} 5~[m]
b]b+PK*h
private static class MaxHeap{ ~JS BZ@
h5Ee*De
void init(int[] data){ 8CUlE-R5
this.queue=new int[data.length+1]; 6E-AfY'<
for(int i=0;i queue[++size]=data; ]SmN}Iq1
fixUp(size); Miz?t*|{[
} ;O7Vl5R
} i*((@:
#M)+sK$H%f
private int size=0; ]5r@`%9
!T#EkMM
private int[] queue; 1{AK=H')
jx{wOb~oO)
public int get() { z*UgRLKZD
return queue[1]; )*XD"-9
} v&qL r+_7
2e9.U/9
public void remove() { ifcp!l+8
SortUtil.swap(queue,1,size--); q-s(2C
fixDown(1); bE;c&g
} )|=4H>?%
file://fixdown ;pw9+zo^M
private void fixDown(int k) { fKW)h?.Kd
int j; =NmW}x|n
while ((j = k << 1) <= size) { .b?Aq^i8
if (j < size %26amp;%26amp; queue[j] j++; yv|`A2@9
if (queue[k]>queue[j]) file://不用交换 f_2(`T#
break; K3iQ/j~aq
SortUtil.swap(queue,j,k); bC/Ql
k = j; 8'"=y}]H~
} tZG l^mA"g
} N%F4ug@i
private void fixUp(int k) { suS[P?4
while (k > 1) { !nsx!M
int j = k >> 1; %:v<&^oDlm
if (queue[j]>queue[k]) ?>Ngsp>-P
break; 2?{'(iay
SortUtil.swap(queue,j,k); nTl2F1(sV7
k = j; e%lxRN"b
} =4$ErwI_dm
} PthgxB^
uBl&{$<
} l,*5*1lM
Wu"1M^a
} g4u6#.m(
>=4('
SortUtil： J5(^VKj
{- &`@V
package org.rut.util.algorithm; S=gby
O0FUJGuTS
import org.rut.util.algorithm.support.BubbleSort; wB bCGU
import org.rut.util.algorithm.support.HeapSort; 3RanAT.nu:
import org.rut.util.algorithm.support.ImprovedMergeSort; @qpj0i+>*
import org.rut.util.algorithm.support.ImprovedQuickSort; (:I]v_qEYS
import org.rut.util.algorithm.support.InsertSort; snWe&-
import org.rut.util.algorithm.support.MergeSort; 1F_$[iIX]
import org.rut.util.algorithm.support.QuickSort; \,fa"^8
import org.rut.util.algorithm.support.SelectionSort; ~yt7L,OQ
import org.rut.util.algorithm.support.ShellSort; `^] D;RfE
>(-A"jf
/** *4e?y
* @author treeroot \1SC:gN*#
* @since 2006-2-2 i),bAU!+m
* @version 1.0 ap8q`a{j^
*/ 4l7 Ny\J
public class SortUtil { zn>+\
public final static int INSERT = 1; wBvVY3VQ^
public final static int BUBBLE = 2; =P%&]5ts
public final static int SELECTION = 3; ;{aGEOP'U
public final static int SHELL = 4; `U=Jbdc l3
public final static int QUICK = 5; $H)QUFyC
public final static int IMPROVED_QUICK = 6; t.dr<
public final static int MERGE = 7; |dz"uIrT
public final static int IMPROVED_MERGE = 8; X5\xq+Ih
public final static int HEAP = 9; xKl1DIN[
/z_]7]
public static void sort(int[] data) { 'zbvg0T
sort(data, IMPROVED_QUICK); E#\Oe_eq~N
} sQJGwZ7
private static String[] name={ m8;w7S7,j~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |Iwglb!k
}; |lcp (u*u
`/Rqt+C
private static Sort[] impl=new Sort[]{ ,/%'""`w
new InsertSort(), <=V{tl
new BubbleSort(), `KN>0R2k
new SelectionSort(), 9|lLce$
new ShellSort(), WrSc@j&Ycv
new QuickSort(), KzP{bK5/
new ImprovedQuickSort(), qDG2rFu&[
new MergeSort(), T@=C2 1
new ImprovedMergeSort(), .9J}Z^FD
new HeapSort() Q`W2\Kod]
}; 2lO(f+
^86M94k
public static String toString(int algorithm){ f9 \$,7F
return name[algorithm-1]; YrJUs]A
} */l;e<E
aG83@ABx
public static void sort(int[] data, int algorithm) { "a=Hr4C*r
impl[algorithm-1].sort(data); "p*'HQ
} tfN[-3)Z
@ ?M\[qeF@
public static interface Sort { Q#G xo
public void sort(int[] data); i6KB\W2
} N[e,%heR
-iS^VzI|I
public static void swap(int[] data, int i, int j) { *g,ls(r\[
int temp = data; Uns%6o
data = data[j]; t^KQ*8clG
data[j] = temp; .}/8]
} $L8>Ha}
} rD~/]y)t