[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; tr58J%Mu
} m=TZfa^r
int i1=l; F$ckW'V
int i2=mid+1; >,.\`.0
for(int cur=l;cur<=r;cur++){ '|}H,I{
if(i1==mid+1) 5&.I9}[)j
data[cur]=temp[i2++]; I+QM":2
else if(i2>r) #r,!-;^'p
data[cur]=temp[i1++]; cd`P'GDF
else if(temp[i1] data[cur]=temp[i1++]; g'Wr+(A_
else c_t7<
data[cur]=temp[i2++]; MO? }$j
} )Fw#]~Z
} y Ni3@f
hY/qMK5
} Kpkpr`:)]
vXZ )
改进后的归并排序: {N << JX
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package org.rut.util.algorithm.support; TEla?N
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import org.rut.util.algorithm.SortUtil; Uu|2!}^T
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/** VR'zm\< D
* @author treeroot >%5GMx>m
* @since 2006-2-2 lk[u
* @version 1.0 WpOH1[8v
*/ g][n1$%
public class ImprovedMergeSort implements SortUtil.Sort { qC-4X"y+
{L \TO,
private static final int THRESHOLD = 10; 4&%E?_M
36Lf8~d4"h
/* W.59Al'
* (non-Javadoc) 8g=];@z
* cG(%P$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zcuz @
*/ N'PK4:
public void sort(int[] data) { ~Lq`a@]A
int[] temp=new int[data.length]; YV'B*arIA
mergeSort(data,temp,0,data.length-1); Esm=sPW
} %0({MU
P F);KQ
private void mergeSort(int[] data, int[] temp, int l, int r) { $h}w:AV:
int i, j, k; gB>AYL%o=
int mid = (l + r) / 2; iVo-z#
if (l == r) eep/96G ?
return; %TO&
if ((mid - l) >= THRESHOLD) D~TlG@Pq
mergeSort(data, temp, l, mid); v?}rA%so
else ;&!QN#_
insertSort(data, l, mid - l + 1); 0b<Qs88yd>
if ((r - mid) > THRESHOLD) ~+,ZD)AKi4
mergeSort(data, temp, mid + 1, r); jAovzZ6BL
else %zR5q Lb
insertSort(data, mid + 1, r - mid); [;l;kom
E>:#{%
for (i = l; i <= mid; i++) { 'e6J&X
temp = data; WEoD?GLS8
} VA`VDUG,
for (j = 1; j <= r - mid; j++) { PP/#Z~.M
temp[r - j + 1] = data[j + mid]; b&]z^_m)
} GnCs_[*&r
int a = temp[l]; *^XMf
int b = temp[r]; e.Jaq^Gw|
for (i = l, j = r, k = l; k <= r; k++) { 1/syzHjbY
if (a < b) { wa!z:}]
data[k] = temp[i++]; 9Z"WV5o
a = temp; Ft}nG&D
} else { ,zdK%V}
data[k] = temp[j--]; oTr,zRL
b = temp[j]; e.Q'l/g
} ;iQw2XhT
} y-S23B(
} \?|^w.
0g Hd{H=
/** @i#=1)Ze
* @param data |+Z-'k~Q
* @param l Ir(U7D
* @param i R8YU#D (Q
*/ AG#Mj(az!
private void insertSort(int[] data, int start, int len) { 1;!dTh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pa=xc>m^
} L>lxkq8!Q
} [h>A<O
} fJ=(oF=
} y5?kv-"c
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堆排序： X_)I"`
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package org.rut.util.algorithm.support; W}|k!_/
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import org.rut.util.algorithm.SortUtil; :*R+ee,&-
A+}O~,mxP8
/** o#D'"Tn!
* @author treeroot xCyD0^KY
* @since 2006-2-2 PG@C5Rnu
* @version 1.0 ZTj!ti;5
*/ Ef3="}AI;
public class HeapSort implements SortUtil.Sort{ e@5w?QzW
O7od2fV(i7
/* (non-Javadoc) #iRd2Qj%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p _2Yc]8
*/ %`s1 Ocvp
public void sort(int[] data) { b/tcD r
MaxHeap h=new MaxHeap(); Zrew}0
h.init(data); cV7a, *
for(int i=0;i h.remove(); tVNFulcz$
System.arraycopy(h.queue,1,data,0,data.length); ^* CKx
} p S|
Xi~I<&
private static class MaxHeap{ .3SP#mI
! GtF%V
void init(int[] data){ -I z,vd
this.queue=new int[data.length+1]; TxKNDu
for(int i=0;i queue[++size]=data; *ozXilO
fixUp(size); bn=7$Ax
} f:AfMf>m
} X|4Kdi.r@
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private int size=0; ]<9o>#3
kLXa1^Lq
private int[] queue; J:IAs:e`
A6xN6{R!
public int get() { [Kb)Q{=)
return queue[1]; %/}d'WJR
} q6o}2<T@
m6@;!*Y
public void remove() { \ >#y*W<
SortUtil.swap(queue,1,size--); Z4{N|h?
fixDown(1); T:!H^
} sdKm@p|/|
file://fixdown [vnxp/v/<
private void fixDown(int k) { |-%dN}O
int j; yb\!4ml
while ((j = k << 1) <= size) { ^a|
if (j < size %26amp;%26amp; queue[j] j++; 0&3zBL%Bo
if (queue[k]>queue[j]) file://不用交换 R[#B|$
break; R$">
SortUtil.swap(queue,j,k); KB{/L5
k = j; A>)W6|m|
} oJc7az
} rT;_"y}
private void fixUp(int k) { ,0i72J
while (k > 1) { MB6lKLy6~
int j = k >> 1; nFefDdP
if (queue[j]>queue[k]) @-ir
break; Q.V+s
SortUtil.swap(queue,j,k); yATXN>]l
k = j; {axRq'=
} n0uL^{B
} VT;cz6"6b4
_z#S8Y
} mhNgXp)_56
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} Nig)!4CG
<[17&F0
SortUtil： !3"Hn
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package org.rut.util.algorithm; uK[gI6M
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import org.rut.util.algorithm.support.BubbleSort; g{hbq[>X]
import org.rut.util.algorithm.support.HeapSort; D&6.> wt .
import org.rut.util.algorithm.support.ImprovedMergeSort; 9 vNz yh\
import org.rut.util.algorithm.support.ImprovedQuickSort; HzZX=c
import org.rut.util.algorithm.support.InsertSort; WVx^}_FD0
import org.rut.util.algorithm.support.MergeSort; `Tr !Gj_
import org.rut.util.algorithm.support.QuickSort; %.:]4jhk
import org.rut.util.algorithm.support.SelectionSort; iP?lP= M
import org.rut.util.algorithm.support.ShellSort; 7V"Jfh4_
H$,wg!kY!
/** ^>s{o5H&
* @author treeroot hgdr\ F
* @since 2006-2-2 ?~;q r
* @version 1.0 LEAU3doK;
*/ LOk J
public class SortUtil { 1R#1Fy%
public final static int INSERT = 1; `CG% Y>+
public final static int BUBBLE = 2; prGp/"E
public final static int SELECTION = 3; zKf0 :X
public final static int SHELL = 4; zH *7!)8
public final static int QUICK = 5; *{=q:E$
public final static int IMPROVED_QUICK = 6; Emv9l~mIu
public final static int MERGE = 7; 6h&i<->
public final static int IMPROVED_MERGE = 8; ~tB9kLFG
public final static int HEAP = 9; %kk~qvW
sb%l N
public static void sort(int[] data) { $-n_$jLY
sort(data, IMPROVED_QUICK); jZ?^ |1
} UFj/Y;
private static String[] name={ $o*p#LU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jG,^~5x
}; _9z+xl
Fz]!2rt
private static Sort[] impl=new Sort[]{ M:%Ll3
new InsertSort(), B,A\/%<
new BubbleSort(), '~pZj"uy
new SelectionSort(), ^!K 8nW{*
new ShellSort(), E{'\(6z_
new QuickSort(), -M-y*P)
new ImprovedQuickSort(), f/i[? gw
new MergeSort(), \>e>J\t:
new ImprovedMergeSort(), deutY.7g
new HeapSort() n:JG+1I
}; i]0$7s9!
LhKUZX,P8
public static String toString(int algorithm){ B_0]$D0 ^
return name[algorithm-1]; eie u|_
} 3\5I4#S
}ct*<zj[~u
public static void sort(int[] data, int algorithm) { p5bM/{DP;K
impl[algorithm-1].sort(data); 1<wolTf
} L$; gf_L
d)v!U+-|'
public static interface Sort { vtTXs]>
public void sort(int[] data); D 6F/9|
} ,>I_2mc
a0cW=0l=
public static void swap(int[] data, int i, int j) { iBqIV
int temp = data; 7 '7a`-W
data = data[j]; RH;Kbu
data[j] = temp; Cta!"=\
} =5M '+>
} 1i$OcN?x%