[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; G`Nw]_ Z_
} m9DFnk<D
int i1=l; "w'pIUQ3,
int i2=mid+1; ,PTM'O@aU#
for(int cur=l;cur<=r;cur++){ j|k/&q[St
if(i1==mid+1) s)a-ky(
data[cur]=temp[i2++]; 6]?mjG6
else if(i2>r) >v.fH6P,}
data[cur]=temp[i1++]; P1Hab2%+
else if(temp[i1] data[cur]=temp[i1++]; ` kT\V'
else *c$[U{Px
data[cur]=temp[i2++]; EfrQ~`\
} I'4(Ibl+
} r ;RYGLx
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} N}?|ik
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改进后的归并排序: 4XjwU`
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package org.rut.util.algorithm.support; .h-mFcjy
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import org.rut.util.algorithm.SortUtil; ^l!SIu
3%kUj
/** "GO!^ZG]
* @author treeroot eU1F7LS
* @since 2006-2-2 ez,.-@O
* @version 1.0 hCcI]#S&
*/ /iU<\+ H
public class ImprovedMergeSort implements SortUtil.Sort { TTz=*t+D
w}xA@JgQ%
private static final int THRESHOLD = 10; @7twe;07r
x77L"5g
/* u}@N Qeg
* (non-Javadoc) ba|xf@=&
* K81X32Lm'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d`^3fr'.4A
*/ J:@gmo`M;V
public void sort(int[] data) { )D+BvJ Y"
int[] temp=new int[data.length]; $ZM'dIk?
mergeSort(data,temp,0,data.length-1); #n>U7j9`O
} .G{cx=;
ys9:";X;}
private void mergeSort(int[] data, int[] temp, int l, int r) { |]?f6^|4
int i, j, k; F1#{(uW
int mid = (l + r) / 2; q`*.F#/4c
if (l == r) |[?Otv
return; ,a #>e
if ((mid - l) >= THRESHOLD) }dkXRce*
mergeSort(data, temp, l, mid); Y)sB]!hx
else )p\`H;7*V4
insertSort(data, l, mid - l + 1); {A0jkU
if ((r - mid) > THRESHOLD) yYP_TuNa
mergeSort(data, temp, mid + 1, r); D S U`(`
else qLEYBv-3
insertSort(data, mid + 1, r - mid); "iSY;y o
zZCl]cql
for (i = l; i <= mid; i++) { >+M[!;m}
temp = data; 8^UF0>`'
} jY=y<R_oK
for (j = 1; j <= r - mid; j++) { @_ %RQO_X
temp[r - j + 1] = data[j + mid]; cMY}Y [2c
} rN}pi@
int a = temp[l]; & kC
int b = temp[r]; /~NX<Ye&
for (i = l, j = r, k = l; k <= r; k++) { A6z,6v6
if (a < b) { `K{}
data[k] = temp[i++]; 1>Sfv|ZP,
a = temp; 7{m>W!
} else { 3``JrkPI
data[k] = temp[j--]; 5#.m'a)
b = temp[j]; Jt8;ddz
} mw"FQ?bJ
} iB)\*)
} ]?y~;-^
#[prG
/** I$;`^z
* @param data l U/Xi
* @param l IC cr
* @param i cGV%=N^BE<
*/ Nf]?hfJ
private void insertSort(int[] data, int start, int len) { ;fNCbyg4 I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $s7U |F,I
} Q!l(2nva
} Y$JVxly
} 8_%GH}{
} AG,><UP
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堆排序： q;eb
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package org.rut.util.algorithm.support; kLgkUck8]
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import org.rut.util.algorithm.SortUtil; c(Dp`f,
n#X~"|U`
/** wkp2A18n
* @author treeroot ;%n'k
* @since 2006-2-2 ~@'wqGTp
* @version 1.0 +xYu@r%R
*/ ?}?"m:=
public class HeapSort implements SortUtil.Sort{ Mq0MtC6-
._rPM>B?
/* (non-Javadoc) KU8,8:yY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @aS)=|Ls\
*/ 0F)v9EK(W4
public void sort(int[] data) { sC3Vj(d!i
MaxHeap h=new MaxHeap(); fu!T4{2
h.init(data); M(C">L]8
for(int i=0;i h.remove(); );!ND%
System.arraycopy(h.queue,1,data,0,data.length); \TP$2i%W
} Q:P)g#suc
%6Gg&Y$j!
private static class MaxHeap{ _HwA%=>7
c6:uM1V{
void init(int[] data){ Tt: (l/1
this.queue=new int[data.length+1]; 2;Z 0pPR&
for(int i=0;i queue[++size]=data; r?DCR\Jq
fixUp(size); xNIrmqm5]
} A+l(ew5Lw$
} T,!EL+o4
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private int size=0; Jr5S8c|"
9QU\J0c/
private int[] queue; : #a
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public int get() { v< P0f"GH
return queue[1]; ta?NO{*
} `4K|L6
9dNB_
public void remove() { ,b5'<3\
SortUtil.swap(queue,1,size--); t'2A)S
fixDown(1); BH'*I yv
} ~v8X>XDL?T
file://fixdown xL15uWk-
private void fixDown(int k) { ,>B11Z}PH
int j; Z )c\B
while ((j = k << 1) <= size) { |^1g*fy?
if (j < size %26amp;%26amp; queue[j] j++; .))g]CH
if (queue[k]>queue[j]) file://不用交换 zQ+Mu^|u+
break; {Zc8,jm
SortUtil.swap(queue,j,k); 6k hBT'n
k = j; 1hw.gn*JK>
} N}#Rw2Vl
} JU)^b V_
private void fixUp(int k) { LuySa2,
while (k > 1) { s~OcL 5
int j = k >> 1; ~ky;[
if (queue[j]>queue[k]) KJ+6Y9b1
break; 6/<Hx@r (
SortUtil.swap(queue,j,k); 0d+n[Go+S
k = j; f&CQn.K"
} L-(bw3Yr>
} gY7sf1\wX
EK# 11@0%
} Phi5;U!
O+W<l:|$
} "mQp#d/'
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SortUtil： *)RKU),3nL
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package org.rut.util.algorithm; /xUF@%rT
_#V&rY&@
import org.rut.util.algorithm.support.BubbleSort; e:HORc~U
import org.rut.util.algorithm.support.HeapSort; i+14!LlI
import org.rut.util.algorithm.support.ImprovedMergeSort; 4FzTf7h^
import org.rut.util.algorithm.support.ImprovedQuickSort; 9D14/9*(dU
import org.rut.util.algorithm.support.InsertSort; ~Eg]Auk7
import org.rut.util.algorithm.support.MergeSort; E_~e/y"-
import org.rut.util.algorithm.support.QuickSort; vb[0H{TT2
import org.rut.util.algorithm.support.SelectionSort; '9!_:3[d\]
import org.rut.util.algorithm.support.ShellSort; 0J+WCm`
S${%T$>
/** :fj>JF\[
* @author treeroot vD8pVR+
* @since 2006-2-2 lo!pslqsn
* @version 1.0 [yMSCCswW
*/ KKsVZ~<6u
public class SortUtil { ^N^G?{EV/#
public final static int INSERT = 1; <}lah%4F
public final static int BUBBLE = 2; [2,D]e
public final static int SELECTION = 3; I/w;4!+)
public final static int SHELL = 4; }K?b2 6`
public final static int QUICK = 5; ;t*SG*Vi
public final static int IMPROVED_QUICK = 6; Gy\]j
public final static int MERGE = 7; QKjn/%l"@
public final static int IMPROVED_MERGE = 8; poAJl;T
public final static int HEAP = 9; (d#&m+ g]
:m`D
public static void sort(int[] data) { t*= nI $
sort(data, IMPROVED_QUICK); |fKT@2(
} ^##j {h7
private static String[] name={ a]*{!V{$i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x_~_/&X5
}; WOn<JCh]
,Vq$>T@z
private static Sort[] impl=new Sort[]{ vu)EB!%[
new InsertSort(), oz=V|7,
new BubbleSort(), c@g(_%_|2
new SelectionSort(), xS UpVK
new ShellSort(), A5j?Yts
new QuickSort(), J&j5@
new ImprovedQuickSort(), by+xK~>
new MergeSort(), LilK6K
new ImprovedMergeSort(), B:X%k/{
new HeapSort() (-$5YKm
}; bVz<8b6h'-
+c/!R|h=S
public static String toString(int algorithm){ :|9vMM^$
return name[algorithm-1]; ;"cQ)=s9Y
} @Y`Z3LiR$
'yVe&5?
public static void sort(int[] data, int algorithm) { FdE?uw
impl[algorithm-1].sort(data); hrnE5=iY
} &Y^4>y%
PESvx>:
public static interface Sort { Je|:\Qk
public void sort(int[] data); ?GH/W#{o)
} hqln6m
Qw5-/p=t
public static void swap(int[] data, int i, int j) { h[u@UGK%
int temp = data; G%k&|
data = data[j]; :xHKbWz6j
data[j] = temp; 4AzDWK@/
} |$ ^3 5F
} AS]8rH