[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; ^#H%LLt
} P'prp=JD
int i1=l; AZmABl
int i2=mid+1; RVxlN*
for(int cur=l;cur<=r;cur++){ 49o5"M(
if(i1==mid+1) `-l,`7e'
data[cur]=temp[i2++]; e ;4y5i
else if(i2>r) P1f?'i?J
data[cur]=temp[i1++]; J?ljqA}i
else if(temp[i1] data[cur]=temp[i1++]; t3TnqA
else A7~~{9
data[cur]=temp[i2++]; 3{mu77
} e1e2Wk
} B!vI^W
yqpb_h9
} JrF\7*rh9
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改进后的归并排序: C0\A
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package org.rut.util.algorithm.support; R3]Ra&h6N)
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import org.rut.util.algorithm.SortUtil; Bc{#ia
w5I +5/I
/** +jcg[|-'/
* @author treeroot W/O&(t
* @since 2006-2-2 W/PZD (
* @version 1.0 Nl_Sgyx,\
*/ tqY)
public class ImprovedMergeSort implements SortUtil.Sort { o=`FGowF
h9)QQPP
private static final int THRESHOLD = 10; h"S+8Y:1{k
eMf+b;~R
/* v)(tB7&`=
* (non-Javadoc) ]KMOLe6(
* W&[}-E8<Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gt5
*/ JFx=X=C
public void sort(int[] data) { Ak!l}d
int[] temp=new int[data.length]; X!0s__IOc
mergeSort(data,temp,0,data.length-1); sF?N vp
} ,Yg<Z1
fDmGgD?
private void mergeSort(int[] data, int[] temp, int l, int r) { Cc:m~e6r
int i, j, k; 9,|&+G$
int mid = (l + r) / 2; pA9:1*+;;
if (l == r) RltG/ZI
return; EQ&E C
if ((mid - l) >= THRESHOLD) 1]r+$L3
mergeSort(data, temp, l, mid); iY~9`Q1E
else 8S1%;@c
insertSort(data, l, mid - l + 1); ^a@Vn\V1
if ((r - mid) > THRESHOLD) wVD-}n1"
mergeSort(data, temp, mid + 1, r); Qc2_B\K^
else C%<[mM
insertSort(data, mid + 1, r - mid); t@-:e^ v
U$KdY _Z97
for (i = l; i <= mid; i++) { vVF#]t b|
temp = data; 2RDos#
} n$ye:p>`-
for (j = 1; j <= r - mid; j++) { Fkas*79
temp[r - j + 1] = data[j + mid]; K /h9x9^
} .}.5|z} A
int a = temp[l]; iq`y
int b = temp[r]; Sk@~}
for (i = l, j = r, k = l; k <= r; k++) { Zg%SE'kK
if (a < b) { kStWsc$;+T
data[k] = temp[i++]; IMzhEm
a = temp; 5Bw
} else { o>{+vwK
data[k] = temp[j--]; v/f&rK*>
b = temp[j]; xz YvD{>
} +x$;T*0
} @*W,Jm3Y
} emb~l{K$
krm&.J
/** KLlo^1.<
* @param data Y[x9c0
* @param l aX6.XHWbDf
* @param i @AL,@P/9=
*/ <#ujm fD
private void insertSort(int[] data, int start, int len) { o Wg5-pMWZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dq+rEt
} xmZ]mu,,$
} C\UD0r'p?
} 2a2C z'G
} T$13"?sr=
72} MspzUt
堆排序： FLY#
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package org.rut.util.algorithm.support; $xmltvaF
j2"jCv
import org.rut.util.algorithm.SortUtil; ~q#UH'=%
+2`RvQN
/** M~;Ww-./
* @author treeroot &| el8;D
* @since 2006-2-2 0*W=u-|s6
* @version 1.0 yWu80C8q
*/ UO8#8
public class HeapSort implements SortUtil.Sort{ u!mUUFl
T<~NB5&f
/* (non-Javadoc) 71nXROB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z^S=ji U++
*/ |"DQ^)3Pi
public void sort(int[] data) { (4n8[
MaxHeap h=new MaxHeap(); N54U [sy
h.init(data); I :%(nKBK
for(int i=0;i h.remove(); $Ne$s
System.arraycopy(h.queue,1,data,0,data.length); F))+a&O
} ?%(8RQ
828E^Q"<
private static class MaxHeap{ UyBI;k^]
~c,HE] B
void init(int[] data){ _!H{\kU
this.queue=new int[data.length+1]; [Hy0j*
for(int i=0;i queue[++size]=data; $`x4|a8-
fixUp(size); X*1vIs;[@
} $S|bD$e
} l~Hs]*jm
=l&7~
private int size=0; i,M<}e1
4StiYfae
private int[] queue; *xA&t)z(i
wqJ^tA!
public int get() { _a"5[sG
return queue[1]; Vq2d+ ,fb
} DzYi> E:*
q>X#Aaib
public void remove() { 4!,x3H'
SortUtil.swap(queue,1,size--); |7 ]v&?y
fixDown(1); h)7{Cj
} qk{2%,u$@{
file://fixdown Co&#mVY4,
private void fixDown(int k) { ,]\L\V
int j; Y` Oz\W
while ((j = k << 1) <= size) { Eb{Zm<TP
if (j < size %26amp;%26amp; queue[j] j++; xX*I.saK
if (queue[k]>queue[j]) file://不用交换 }&Ngh4/
break; C:xgM'~+
SortUtil.swap(queue,j,k); Z0s}65BR
k = j; b/HhGA0
} !E8y!|7$
} BZP}0
private void fixUp(int k) { FM$XMD0=
while (k > 1) { #S)+eH
int j = k >> 1; <0g.<n,
if (queue[j]>queue[k]) RTHD2
break; A-Be}A
SortUtil.swap(queue,j,k); / CEnyE/
k = j; \/J>I1J
} |N/Grk4
} $OB2ZS"
uOUgU$%zqH
} `w';}sQA7
t>"UenJt-
} ~x^E kE
kN_ i0~y@-
SortUtil： _b|mSo,{Y
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package org.rut.util.algorithm; R?Zv
Lgp{ hK
import org.rut.util.algorithm.support.BubbleSort; no_;^Ou?
import org.rut.util.algorithm.support.HeapSort; 15dhr]8E
import org.rut.util.algorithm.support.ImprovedMergeSort; k8IhQ{@
import org.rut.util.algorithm.support.ImprovedQuickSort; G(gJtl
import org.rut.util.algorithm.support.InsertSort; |`vwykhezO
import org.rut.util.algorithm.support.MergeSort; g<U\7Vp\1
import org.rut.util.algorithm.support.QuickSort; =f0qih5.4
import org.rut.util.algorithm.support.SelectionSort; v6=pV4k9
import org.rut.util.algorithm.support.ShellSort; IlN: NS
xe?!UCUb@
/** w3l2u1u
* @author treeroot QL/I/EgqC
* @since 2006-2-2 Io_bS+
* @version 1.0 `R[cM;c2
*/ X<G"GaL
public class SortUtil { "?9rJx$
public final static int INSERT = 1; R 6JHRd
public final static int BUBBLE = 2; {<ms;Oi'
public final static int SELECTION = 3; wr);+.T9R
public final static int SHELL = 4; y buKwZFC
public final static int QUICK = 5; ? nx3#<
public final static int IMPROVED_QUICK = 6; ((0nJJjz
public final static int MERGE = 7; ,GOH8h
public final static int IMPROVED_MERGE = 8; k-it#'ll{x
public final static int HEAP = 9; X5U#^^O$E%
U]Y</>xGI
public static void sort(int[] data) { suKr//_
sort(data, IMPROVED_QUICK); B|WM;Y^
} ya3k;j2C
private static String[] name={ >lPWji'4;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F/%M`?m"ie
}; z|Y Ms?
p~Wy`g-
private static Sort[] impl=new Sort[]{ I<+EXH%1,
new InsertSort(), 5aZbNV}-
new BubbleSort(), q4MR9ig1E_
new SelectionSort(), ohU}ST:9
new ShellSort(), W6c]a/
new QuickSort(), j+"w2
new ImprovedQuickSort(), i0}f@pCB?X
new MergeSort(), l+nT$IPF
new ImprovedMergeSort(), OsT|MX
new HeapSort() '3|fv{I
}; TJ_Wze-lQ
h0.2^vM)R
public static String toString(int algorithm){ 7Is:hx|:
return name[algorithm-1]; .Gt_~x
} 9Bao~(j/k
!!k^M"e2
public static void sort(int[] data, int algorithm) { c_4K
impl[algorithm-1].sort(data); (S~kNbIa
} 4`e[gvh
oRZ98?Y\B
public static interface Sort { ^UCH+Cyl
public void sort(int[] data); 9Iu"DOxX%
} bWgRGJqt
[XE\2Qa8e
public static void swap(int[] data, int i, int j) { ^c<8|lK L@
int temp = data; +70x0z2
data = data[j]; !,|-{":
data[j] = temp; =PF2p'.o
} 1}_4C0h\'
} Jmuyd\?,b