[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; 0UN65JBuD
} ?>T (
int i1=l; f~Ve7
int i2=mid+1; 9^2l<4^Z
for(int cur=l;cur<=r;cur++){ JL:\\JT.
if(i1==mid+1) R$M>[Kjn
data[cur]=temp[i2++]; ~Blsj9a2
else if(i2>r) g'<ekY+V:
data[cur]=temp[i1++]; <:!;79T\
else if(temp[i1] data[cur]=temp[i1++]; K['Gp>l
else DEN (pA\
data[cur]=temp[i2++]; 1Farix1YDq
} PsOu:`=r
} 'E_~>
x!;;;iS
} V}po
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改进后的归并排序: mgI7zJX
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package org.rut.util.algorithm.support; *^s^{0Ad
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import org.rut.util.algorithm.SortUtil; i_ z4;%#?
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/** 7CV}QV}G
* @author treeroot ~F^7L5d}C
* @since 2006-2-2 c^W \0
* @version 1.0 [;,Xp/
*/ #8sv*8&
public class ImprovedMergeSort implements SortUtil.Sort { <NlL,
k:*(..!0z
private static final int THRESHOLD = 10; Cs?[
1<$z-y'
/* 1# ;`1i
* (non-Javadoc) dvPlKLp
* {qbxiL-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zA%$l&QN]
*/ VB&`g<
public void sort(int[] data) { M#o'hc
int[] temp=new int[data.length]; F_z1ey`t
mergeSort(data,temp,0,data.length-1); AH'4k(-
} -YJ4-]Z
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private void mergeSort(int[] data, int[] temp, int l, int r) { ,;k`N`#'
int i, j, k; 1 TA\6a}
int mid = (l + r) / 2; U?&&yynK
if (l == r) I`4k5KB;
return; PCZ%<>v
if ((mid - l) >= THRESHOLD) 8}>s{u;W
mergeSort(data, temp, l, mid); T)tf!v3v
else C)R#Om
insertSort(data, l, mid - l + 1); CA5q(ID_
if ((r - mid) > THRESHOLD) .g52p+Z#
mergeSort(data, temp, mid + 1, r); 'Z82+uU%
else ' T%70)CM~
insertSort(data, mid + 1, r - mid); xXfFi5Eom
x A"V!8C
for (i = l; i <= mid; i++) { ,Uu#41ZOKL
temp = data; E)]RQ~jY?
} M$MFUGS'
for (j = 1; j <= r - mid; j++) { bC0DzBnM;
temp[r - j + 1] = data[j + mid]; :!<U"AC
} w i=&W
int a = temp[l]; *28:|blbL
int b = temp[r]; W $EAo+V
for (i = l, j = r, k = l; k <= r; k++) { WN3]xw3
if (a < b) { W}rLHAaDh
data[k] = temp[i++]; 4)+L(KyB2
a = temp; =At)?A9[
} else { A_}6J,*u
data[k] = temp[j--]; 9f_Qs4
b = temp[j]; $0P7^4)w:
} h7cE"m
} ;b;Bl:%?
} KxUO=v<u
`|f1^C^
/** IXof-I%8
* @param data S7f"\[Aw
* @param l bm#/ KT_8
* @param i t)^18 z
*/ S/)yi
private void insertSort(int[] data, int start, int len) { {^_K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p n(y4we
} FN"Ye*d
} 5[|ZceY
} !X ={a{<,T
} Y:4/06I
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堆排序： ~U<=SyZYo
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package org.rut.util.algorithm.support; Twq,6X-
W~d^ *LZt
import org.rut.util.algorithm.SortUtil; LQXMGgp
`*w!S8}m;
/** f=T&$tZ<
* @author treeroot )2: ,E
* @since 2006-2-2 \<Di|X1
* @version 1.0 uow{a*qd6
*/ @ *n oma
public class HeapSort implements SortUtil.Sort{ zr^"zcfz&
BT*{&'\/
/* (non-Javadoc) a|kEza,]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6h{>U*N"&d
*/ 8<PQ31
public void sort(int[] data) { buA/G-<e
MaxHeap h=new MaxHeap(); Uj twOv|pF
h.init(data); K-4o_:F
for(int i=0;i h.remove(); nZ8jBCh
System.arraycopy(h.queue,1,data,0,data.length); d~z%kl 5:
} .F/0:)
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private static class MaxHeap{ ewVks>lbz
k293wS
void init(int[] data){ (Z?g^kjq)
this.queue=new int[data.length+1]; tqzr+
for(int i=0;i queue[++size]=data; g-DFcwO,V
fixUp(size); w<Ot0&&
} UX@8
} !]l;n Fd
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private int size=0; A}G>JL
e~PAi8B5
private int[] queue; As>P(
Yge}P:d9
public int get() { tG*HUN?*
return queue[1]; {C5-M!D{<
} C(&3L[
e|eWV{Dsz
public void remove() { #r'S@:[
SortUtil.swap(queue,1,size--); {9XQ~t"m^
fixDown(1); rnRWL4
} q" @%WK
file://fixdown l^R1XBP
private void fixDown(int k) { 5v"Sv
int j; hFMT@Gy
while ((j = k << 1) <= size) { StU9r0`
if (j < size %26amp;%26amp; queue[j] j++; J7p?9
if (queue[k]>queue[j]) file://不用交换 HleMzykF
break; }TRVCF1
SortUtil.swap(queue,j,k); cXbQ
k = j; `c?8i
} li9>zjz
} }xpo@(e
private void fixUp(int k) { d'[]
while (k > 1) { <`d;>r=4z
int j = k >> 1; 7uq^TO>9f
if (queue[j]>queue[k]) 4%5 +
break; >f*Zf(F
SortUtil.swap(queue,j,k); .4XX )f5
k = j; VvTi>2(.
} hE;BT>_dn
} MS;^@>|wj
$fG~;`T
} W~Q;R:y
WT jy"p*
} B~2M/&rM\
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SortUtil： s=hao4v7z
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package org.rut.util.algorithm; xM**n3SZ`
*{dMo,.eI
import org.rut.util.algorithm.support.BubbleSort; o_n 3.O=
import org.rut.util.algorithm.support.HeapSort; #7=- zda5
import org.rut.util.algorithm.support.ImprovedMergeSort; d$:LUxM#
import org.rut.util.algorithm.support.ImprovedQuickSort; eDY)i9"W
import org.rut.util.algorithm.support.InsertSort; zo:NE00
import org.rut.util.algorithm.support.MergeSort; $y,tR.5.)[
import org.rut.util.algorithm.support.QuickSort; mZ~f?{
import org.rut.util.algorithm.support.SelectionSort; UeU`U
import org.rut.util.algorithm.support.ShellSort; T9bUt|
6/.cS4
/** x+EEMv3u:
* @author treeroot @k)[p+)E
* @since 2006-2-2 z m+3aF
* @version 1.0 .zsYVtK
*/ F~?|d0
public class SortUtil { dz1kQzOU*
public final static int INSERT = 1; tv%B=E!r
public final static int BUBBLE = 2; _kdt0Vr,L
public final static int SELECTION = 3; m(IyW734I
public final static int SHELL = 4; 3<_=Vyf
public final static int QUICK = 5; C/MQY:X4
public final static int IMPROVED_QUICK = 6; %|'VucLx
public final static int MERGE = 7; GQDW}b8
public final static int IMPROVED_MERGE = 8; 8/R9YiY5*
public final static int HEAP = 9; +P<#6<gR
j7~Rw"(XQc
public static void sort(int[] data) { gjk;An
sort(data, IMPROVED_QUICK); #'BPW<Ob
} ;*cCaB0u
private static String[] name={ jmF)iDvjuZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .yB{+
}; PQP|V>g
S=G2%u!;
private static Sort[] impl=new Sort[]{ w%-S5#
new InsertSort(), )j. .)o
new BubbleSort(), ~>XqR/v
new SelectionSort(), +asO4'r
new ShellSort(), Wpc8T="q
new QuickSort(), 3 J5lz~6
new ImprovedQuickSort(), =3dd1n;8>
new MergeSort(), "-S@R=bi
new ImprovedMergeSort(), LIn2&r:U
new HeapSort() onl,R{,`0
}; 5]K2to)>`
M2I*_pI
public static String toString(int algorithm){ q4Mv2SPT
return name[algorithm-1]; vbfQy2q
} k:URP`w[X=
0wt4C% .0
public static void sort(int[] data, int algorithm) { ~ 1~|/WG
impl[algorithm-1].sort(data); ZE9.r`
} g]E3+:5dk
*Tr9pq%m
public static interface Sort { !C ZFbz~:
public void sort(int[] data); <u/(7H
} gux?P2f
+'wO:E1( w
public static void swap(int[] data, int i, int j) { e xkPu-[W
int temp = data; Kl<NAv%j
data = data[j]; lIPz"
data[j] = temp; tVh"C%Vkr
} /0Mt-8[
} IyAD>Q^