[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; /lvH p
} UC9w T
int i1=l; HR k^KB
int i2=mid+1; /#?i+z
for(int cur=l;cur<=r;cur++){ \V<deMb=
if(i1==mid+1) NslaG
data[cur]=temp[i2++]; v*e=oyx[
else if(i2>r) LZ~$=<
data[cur]=temp[i1++]; &$NVEmW-J
else if(temp[i1] data[cur]=temp[i1++]; AyZBH&}RZ
else ~48mCD
data[cur]=temp[i2++]; TqMy">>
} 4dvuw{NZ
} V6 ,59
)'?@raB!
} u:4?$%rB
^`!EpO>k9
改进后的归并排序: o"A%dC_
nF|m*_DW
package org.rut.util.algorithm.support; <0)@Ikhx
uI[lrMQYa
import org.rut.util.algorithm.SortUtil; IqONDdep9
P!2[#TL0
/** ,t>/_pI+=
* @author treeroot @AkD-}^[
* @since 2006-2-2 [PW*|U
* @version 1.0 )c<5:c
*/ ;;- I<TL
public class ImprovedMergeSort implements SortUtil.Sort { 0bk094
!ly]{DTmm
private static final int THRESHOLD = 10; LaiUf_W#X
}vdhk0
/* =u`^QE
* (non-Javadoc) rru `%~'O
* X'>]z'0W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1Q$Z'E}SK@
*/ ;zvg] %
public void sort(int[] data) { =Wk!mGc
int[] temp=new int[data.length]; u7<s_M3%N
mergeSort(data,temp,0,data.length-1); A@"CrVE
} Lpdp'9>I
xpVYNS{c+|
private void mergeSort(int[] data, int[] temp, int l, int r) { $ V"7UA22
int i, j, k; ojd/%@+u+Y
int mid = (l + r) / 2; R|AGN*.
if (l == r) 4E& 3{hnp
return; PDssEb7
if ((mid - l) >= THRESHOLD) H\<C@OkJS}
mergeSort(data, temp, l, mid); nZM|8
else yf7p0;$?
insertSort(data, l, mid - l + 1); 7nHlDPps)
if ((r - mid) > THRESHOLD) "VcG3.
mergeSort(data, temp, mid + 1, r); t1 .6+
else wBXgzd%L
insertSort(data, mid + 1, r - mid); !Hr +|HKQ?
;dYpdy
for (i = l; i <= mid; i++) { S\jN:o#b
temp = data; RyxIJJui
} 1]v.Qu<
for (j = 1; j <= r - mid; j++) { U;4:F{3m
temp[r - j + 1] = data[j + mid]; rT ~qoA\
} u]ZCYJ>
int a = temp[l]; ,Tyh._sa
int b = temp[r]; ~Hs a6F&F
for (i = l, j = r, k = l; k <= r; k++) { ~z!U/QR2
if (a < b) { NLC}XL
data[k] = temp[i++]; E$rn^keM
a = temp; T{j&w%(z
} else { _>*$%R
data[k] = temp[j--]; A:ef}OCL
b = temp[j]; PZ;O pp
} MqI!i>
} {j E}mzi
} B;':Eaa@
R '/Ilz`
/** E7axINca
* @param data Qp${/
* @param l 8\t~*@"
* @param i D{/GjFO
*/ yHhBUpIo
private void insertSort(int[] data, int start, int len) { C sn"sf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K$\]\qG6
} uV*&a~
} [3rvRJ.
} V5RfxWtm:
} ,y?0Iwf
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堆排序： 5o2;26c
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package org.rut.util.algorithm.support; Ssr P
6546"sU
import org.rut.util.algorithm.SortUtil; ;e_n7>'#%
eEQ 4L\d
/** 3m?3I2k
* @author treeroot t8 #&bUX
* @since 2006-2-2 X'WbS
* @version 1.0 -2mm 5E~N
*/ QE$sXP7&u
public class HeapSort implements SortUtil.Sort{ y%\kgWV
HkEfBQmh
/* (non-Javadoc) Qg9 N?e{z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }0|,*BkI m
*/ KyNv)=x4c
public void sort(int[] data) { \ M8;CN
MaxHeap h=new MaxHeap(); }ruBbeQ
h.init(data); X5527`?e
for(int i=0;i h.remove(); *^Wx=#w$V
System.arraycopy(h.queue,1,data,0,data.length); 2RidI&?c<
} -}{c;pT
>ZuWsA0q
private static class MaxHeap{ NS;,(v{*N
X[}5hZcX
void init(int[] data){ 9=~"^dp54%
this.queue=new int[data.length+1]; Y_)!U`>N?
for(int i=0;i queue[++size]=data; /N7j5v(
fixUp(size); {o4m3[C7=}
} +EJIYvkFm
} y'pAhdF
c Q|nL
private int size=0; /A4zR
4E}/{1
private int[] queue; 9#iu#?*B
diGPTV-?$
public int get() { ub6=^`>h
return queue[1]; iXMs*GcK
} ,l#Ev{
G0|j3y9$
public void remove() { try'%0}>
SortUtil.swap(queue,1,size--); Qq(/TA0$-
fixDown(1); hkee,PiiP
} } O8|_d
file://fixdown [ K;3Qf)
private void fixDown(int k) { lh&Q{t(+8
int j; G@ XKE17
while ((j = k << 1) <= size) { _K3?0<=4
if (j < size %26amp;%26amp; queue[j] j++; NSUw7hnWvz
if (queue[k]>queue[j]) file://不用交换 k/?5Fs!#
break; znzh$9tH
SortUtil.swap(queue,j,k); @S yGj#
k = j; DDyeNuK
} V.6h6B!vB
} p@y?xZS
private void fixUp(int k) { %:sQ[^0
while (k > 1) { DZ |0CB~
int j = k >> 1; _<|NVweFS
if (queue[j]>queue[k]) 0{j]p^'<
break; u1xCn\
SortUtil.swap(queue,j,k); 0~Z>}(
k = j; &p%0cjg"Q
} HP^<2?K
} $rv&!/}]e
;z/Z(7<;;
} (PE x<r1
#!l\.:h%
} V<Q''%k
7,ysixY
SortUtil： 9^,MC&eb
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package org.rut.util.algorithm; j BS$xW
Q\z6/1:9Z
import org.rut.util.algorithm.support.BubbleSort; A'HFpsa
import org.rut.util.algorithm.support.HeapSort; L}pMjyM
import org.rut.util.algorithm.support.ImprovedMergeSort; K>hQls+
import org.rut.util.algorithm.support.ImprovedQuickSort; //n$#c_}u
import org.rut.util.algorithm.support.InsertSort; {b6| wQ\
import org.rut.util.algorithm.support.MergeSort; \C $LjSS-
import org.rut.util.algorithm.support.QuickSort; oOlqlv
import org.rut.util.algorithm.support.SelectionSort; _]@
import org.rut.util.algorithm.support.ShellSort; NKd}g
I !=ew |
/** W+d=BnOa8
* @author treeroot SKt&]H
* @since 2006-2-2 a,i k=g
* @version 1.0 %wWJVq}jx
*/ "`qmeZ$rg
public class SortUtil { uT:'Kkb!
public final static int INSERT = 1; :jlKj}4A
public final static int BUBBLE = 2; 3oc p4x`[
public final static int SELECTION = 3; <fg~+{PA&
public final static int SHELL = 4; L&ucTc=
public final static int QUICK = 5; 7ESSx"^B
public final static int IMPROVED_QUICK = 6; F_.rLgGY
public final static int MERGE = 7; CT,PQ
public final static int IMPROVED_MERGE = 8; #d2XVpO[0
public final static int HEAP = 9; Hd]o?q\
.\XFhOsa
public static void sort(int[] data) { f]%:.N~1w
sort(data, IMPROVED_QUICK); =jXBF.
} U:"X *
private static String[] name={ D])&>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" blO(Th&
}; LH/lnrN
wV8_O)[
private static Sort[] impl=new Sort[]{ 3m%oXT
new InsertSort(), C+o1.#]JM
new BubbleSort(), n-zAkKM
new SelectionSort(), T%74JRQ
new ShellSort(), ""$vaqt
new QuickSort(), }7?_>
new ImprovedQuickSort(), 6G.(o
new MergeSort(), C.qNBl*
new ImprovedMergeSort(), 'D_a2xo0
new HeapSort() =rz7x
}; :%G_<VAo!
E2dl}S zp
public static String toString(int algorithm){ 6S K;1Bp-{
return name[algorithm-1]; b9nTg
} 1eHU!{<fqm
Zp8\n:
public static void sort(int[] data, int algorithm) { o%3i(H
impl[algorithm-1].sort(data); r@")MOGc
} (;\" K?
8Of.n7{
public static interface Sort { vH1IVF"DS
public void sort(int[] data); ^UU@7cSi|G
} u}I-#j)wap
O-P'Ff"}t
public static void swap(int[] data, int i, int j) { Td,2.YMQ
int temp = data; zF: :?L~
data = data[j]; u@&e{w~0
data[j] = temp; mX2X.ww(4
} s4uZ>
} -6W$@,K