[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; jLc4D'
} XPE{]4 g
int i1=l; */ZrZ^?o
int i2=mid+1; U.UN=uv_
for(int cur=l;cur<=r;cur++){ 2'W3:
if(i1==mid+1) nE)?P*$3Z
data[cur]=temp[i2++]; DOiL3i"H
else if(i2>r) "Q;n-fqf
data[cur]=temp[i1++]; N8;/Zd;^
else if(temp[i1] data[cur]=temp[i1++]; !Y/$I?13Z
else !q!.OQ
data[cur]=temp[i2++]; 1t/#ZT!X/
} O#fGHI<43[
} X2!vC!4P?L
5F$ elW
} \gy39xoW(
GQO}E@W6C
改进后的归并排序: .0;Z:x_3
MHJH@$|]
package org.rut.util.algorithm.support; JSQNx2VqQ
VqLqj$P
import org.rut.util.algorithm.SortUtil; ;_)&#X,?(
#:v}d+
/** JX@/rXFY}
* @author treeroot 37Vs9w
* @since 2006-2-2 %g}ri8
* @version 1.0 PvX>+y5
*/ sF}T9Ue
public class ImprovedMergeSort implements SortUtil.Sort { _M= \s>;G
Jw?J(ig^
private static final int THRESHOLD = 10; 85YE6^y
9/TF#
/* ;muxIr`?
* (non-Javadoc) , }O>,AU
* xpt*S~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8W Mhe=[
*/ V~` ?J6
public void sort(int[] data) { XfmPq'#Z
int[] temp=new int[data.length]; }-9
mergeSort(data,temp,0,data.length-1); LC)-aw>-
} q-O=Em<*
.4pWyqU)!
private void mergeSort(int[] data, int[] temp, int l, int r) { ;QQLYT
int i, j, k; .~qu,q7k~
int mid = (l + r) / 2; Zoh[tO
if (l == r) k2o98bK&;
return; Q.Tn"rE|
if ((mid - l) >= THRESHOLD) I|]~f[xI
mergeSort(data, temp, l, mid); 0\84~t'[
else +G*2f V>
insertSort(data, l, mid - l + 1); }stc]L{79
if ((r - mid) > THRESHOLD) ~]P_Yd-|
mergeSort(data, temp, mid + 1, r); =B_vQJF2
else )*ocX)AE
insertSort(data, mid + 1, r - mid); .^0@^%Wi
Ew1> m'
for (i = l; i <= mid; i++) { <m:8%]%M6
temp = data; ?bu-6pkx]
} d-w#\ ^
for (j = 1; j <= r - mid; j++) { +]P??`,R;
temp[r - j + 1] = data[j + mid]; 1>bG]l1//
} F1%-IBe
int a = temp[l]; \zCT""'i
int b = temp[r]; =n|n%N4Y
for (i = l, j = r, k = l; k <= r; k++) { /9<zG}:B
if (a < b) { C5GO?X2
data[k] = temp[i++]; Ge=+0W)&
a = temp; (<!Yw|~
} else { jC7`_;>=
data[k] = temp[j--]; 9q;n@q:29
b = temp[j]; o_hk!s^4m
} cXu"-/
} 8%v1[Wi
} WVlyR\.
GF[onfQY7
/** $ \0)~cy
* @param data X@JrfvKv[d
* @param l Kk|uN#m
* @param i /ghXI"ChI
*/ +HvEiY
private void insertSort(int[] data, int start, int len) { ^6tGj+D9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :=!?W^J
} jy#'oadS?
} z)N8#Y~vn
} |9cJO@
} }_m/3*x_
]Gm"U!h*
堆排序： LRl2@&z<
ikd~k>F
package org.rut.util.algorithm.support; >DqV^%2l
g9~>mJR
import org.rut.util.algorithm.SortUtil; luAmq+
V*HkFT
/** w4w[qxV>
* @author treeroot GqB]^snh
* @since 2006-2-2 R+Q..9P
* @version 1.0 8V$pdz|[
*/ ~kM# lh7At
public class HeapSort implements SortUtil.Sort{ @*kQZRGK7
d2f
/* (non-Javadoc) Bbk=0+ ^8I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a(- ^ .w
*/ C{7 j<O
public void sort(int[] data) { O3H dPQ
MaxHeap h=new MaxHeap(); ?QuD:vck
h.init(data); . AJ(nJ)
for(int i=0;i h.remove(); uEqL Dg
System.arraycopy(h.queue,1,data,0,data.length); NVqJN$z
} ^5n"L29V
}cUq1r-bW
private static class MaxHeap{ ghtvAG
stn/
void init(int[] data){ .;#Wf@V
this.queue=new int[data.length+1]; @T>\pP]o
for(int i=0;i queue[++size]=data; >S\D+1PV
fixUp(size); fX"cQ&
} %dA6vHI,
} aYc*v5QN3
M'gw-^(
private int size=0; -js:R+C528
ro:B[XE
private int[] queue; M@\A_x(Mas
j?a^fcXB
public int get() { x,)|;HXm
return queue[1]; )nncCUW
} Rs*]I\
[Aqy%mbG
public void remove() { XNODDH
SortUtil.swap(queue,1,size--); `<}Q4p
fixDown(1); dV_ClH &)
} ECq(i(
file://fixdown _J' _9M?>
private void fixDown(int k) { /1A3 Sw
int j; NrQGoAOw
while ((j = k << 1) <= size) { -2Bkun4Pt
if (j < size %26amp;%26amp; queue[j] j++; #6w\r&R6
if (queue[k]>queue[j]) file://不用交换 %NH#8#';2
break; /Z':wu\
SortUtil.swap(queue,j,k); vRp#bScc
k = j; xw[KP [(
} 4}C^s\?z
} ,|:TML
private void fixUp(int k) { `v;9!ReZV
while (k > 1) { ,ddoII
int j = k >> 1; ;h|zNx0
if (queue[j]>queue[k]) !h\>[O
break; 6k569c{7
SortUtil.swap(queue,j,k); v D"4aw
k = j; RRXnj#<g
} \9r1JP0
} ~=xiMB;oH
W@"s~I6
} Fog4m=b`g
Y8$Y]2
} k&TZ
q6R``
SortUtil： >ucVrLm,X
'E_M,Y
package org.rut.util.algorithm; v2Lx4:dzi
l~_]k
import org.rut.util.algorithm.support.BubbleSort; SQ$|s%)oB
import org.rut.util.algorithm.support.HeapSort; c*fMWtPp
import org.rut.util.algorithm.support.ImprovedMergeSort; d2cslDd
import org.rut.util.algorithm.support.ImprovedQuickSort; Kyn[4Bu!?
import org.rut.util.algorithm.support.InsertSort; F@4TD]E0^
import org.rut.util.algorithm.support.MergeSort; ;!RS q'L1
import org.rut.util.algorithm.support.QuickSort; V]4g- CS[
import org.rut.util.algorithm.support.SelectionSort; yiourR)H<
import org.rut.util.algorithm.support.ShellSort; uP;qs8
suo;+T=`I
/** rf}@16O$'
* @author treeroot WDrC
* @since 2006-2-2 QkY]z~P4
* @version 1.0 :9nqQJ+~
*/ i-kj6N5
public class SortUtil { ^a,Oi%
public final static int INSERT = 1; 3mmp5 d
public final static int BUBBLE = 2; ZeB"k)FI>
public final static int SELECTION = 3; JI"&3H")g%
public final static int SHELL = 4; c%?31t
public final static int QUICK = 5; hU: 9zLe
public final static int IMPROVED_QUICK = 6; `=}w(V8pc
public final static int MERGE = 7; )uG7 DR
public final static int IMPROVED_MERGE = 8; y~16o
public final static int HEAP = 9; ;_bZH%o.
O{P@fv%~(o
public static void sort(int[] data) { 3c%dErch
sort(data, IMPROVED_QUICK); `lI(SS]w
} 1]DPy+
private static String[] name={ Oq[2<ept
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |IN{8
}; IF>dsAAI<
#Qir%\*V
private static Sort[] impl=new Sort[]{ Ll2yJ .C4
new InsertSort(), q:iB}ch5R
new BubbleSort(), (SH<]@s
new SelectionSort(), "#ctT-g`6
new ShellSort(), `]u!4pP"
new QuickSort(), /"q wC
new ImprovedQuickSort(), AbqeZn
new MergeSort(), pgp@Zw)r)k
new ImprovedMergeSort(), %1\MW+
new HeapSort() "W"2Y(
}; \ytF@"7
F\K&$5J{p
public static String toString(int algorithm){ t@_MWF
return name[algorithm-1]; W##~gqZ/
} xAZ-_}'tW
Xyz w.%4c
public static void sort(int[] data, int algorithm) { 1o Z!Up0
impl[algorithm-1].sort(data); #0:N$'SZ
} gG?sLgL:
"A4.2
public static interface Sort { [5"F=tT7WP
public void sort(int[] data); f+WN=-F\
} jPDk~|
L\GjG&Y5
public static void swap(int[] data, int i, int j) { mi`jY0e2
int temp = data; `]T#uP<u
data = data[j]; zyHHz\{
data[j] = temp; fN|'aq*Pd
} F4b$
} (4GDh%