[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; ]U#[\ Z
} XMeL^|D
int i1=l; /]k ,,&
int i2=mid+1; *2"bG1`
for(int cur=l;cur<=r;cur++){ &3 XFgHo
if(i1==mid+1) ^T}}4I_Y
data[cur]=temp[i2++]; 8tT&BmT
else if(i2>r) GLaZN4`
data[cur]=temp[i1++]; c>u>Pi;Z
else if(temp[i1] data[cur]=temp[i1++]; C>JekPeM
else x tYV"
data[cur]=temp[i2++]; $K6?(x_
} $/<"Si&(
} e}](6"t`5
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} Pghva*&
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改进后的归并排序: 9*-pden l
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package org.rut.util.algorithm.support; _A;vSp.`
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import org.rut.util.algorithm.SortUtil; 7,W]zKH
;<bj{#mMv
/** "o^bN 9=
* @author treeroot nl)_`8=
* @since 2006-2-2 "q9~C
* @version 1.0 WIEx '{
*/ a%MzNH
public class ImprovedMergeSort implements SortUtil.Sort { @O}IrC!bf
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private static final int THRESHOLD = 10; koncWyW
v2M"b?Q
/* u_}`y1Xu#
* (non-Javadoc) S.Wh4kMUe
* HQ|o%9~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Txu~r0@
*/ xUiWiOihr6
public void sort(int[] data) { &jXca|wAR
int[] temp=new int[data.length]; q9W~7
mergeSort(data,temp,0,data.length-1); xecieC
} jy\W_CT
aW`:)y&f
private void mergeSort(int[] data, int[] temp, int l, int r) { *} *!+C3
int i, j, k; eD*?q7
int mid = (l + r) / 2; _"?c9
if (l == r) };|!Lhl+
return; b"ol\&1 #
if ((mid - l) >= THRESHOLD) P[Y{LKAbb
mergeSort(data, temp, l, mid); $'A4RVVT
else iX8h2l
insertSort(data, l, mid - l + 1); a' IX yj
if ((r - mid) > THRESHOLD) 71k!k&Im
mergeSort(data, temp, mid + 1, r); )CC?vV
else 5`4}A%@&
insertSort(data, mid + 1, r - mid); kP!%|&w;
Tm%$J
for (i = l; i <= mid; i++) { fs2mN1
temp = data; XPHQAo[(s
} r.^0!(d
for (j = 1; j <= r - mid; j++) { 90
temp[r - j + 1] = data[j + mid]; 1KeJd&e
} egZyng pB
int a = temp[l]; V;>9&'Z3
int b = temp[r]; L Yh@ u1p
for (i = l, j = r, k = l; k <= r; k++) { pchQ#GU
if (a < b) { 4o1Q7
data[k] = temp[i++]; :0 W6uFNOU
a = temp; tx^92R2/
} else { +Od1)_'\D3
data[k] = temp[j--]; *A~($ZtL
b = temp[j]; K)<Wm,tON
} dIoF~8V
} l?3vNa FeR
} /M0l p
@Ufa-h5"(
/** =3h+=l[
* @param data !7A"vTs
* @param l SL[rn<x|
* @param i :wQC_;
*/ ??%)|nj.
private void insertSort(int[] data, int start, int len) { U>/<6Wd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IY];Ss&i
} bin6i2b
} ]*bAF^8i
} GwgFi@itN
} k-{yu8*';
2-B6IPeI
堆排序： 9uA, +
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package org.rut.util.algorithm.support; 8!Wfd)4=,F
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import org.rut.util.algorithm.SortUtil; >}-~rZ
;):8yBMk
/** fUb1/-}
* @author treeroot ,]0S4h67
* @since 2006-2-2 17e=GL
* @version 1.0 Na\3.:]z
*/ Oamv9RyDvC
public class HeapSort implements SortUtil.Sort{ 4 hL`=[AB
oHxGbvQc
/* (non-Javadoc) C}n'>],p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Y\QGuT
*/ ^{),+S
public void sort(int[] data) { [yO=S0 e
MaxHeap h=new MaxHeap(); uQeqnGp
h.init(data); m,\i
for(int i=0;i h.remove(); gE\A9L~b
System.arraycopy(h.queue,1,data,0,data.length); IM@"AD52a
} W;^Rx.W
n"(7dl?
private static class MaxHeap{ BmJkt3j."
S$S_nNq
void init(int[] data){ y:qx5Mi
this.queue=new int[data.length+1]; MinbE13?U
for(int i=0;i queue[++size]=data; IeO-O'^&`
fixUp(size); :9(3h"
} \M+MDT&
} gdOe)il\
0LS-i%0
private int size=0; N2ni3M5v
%,33gZzf
private int[] queue; E|Q{]&$;Z"
S <2}8D
public int get() { cN62M=**
return queue[1]; xC<R:"Mn
} |a%B|CX
5i|s>pD4z1
public void remove() { XFtOmY
SortUtil.swap(queue,1,size--); OWqrD@
fixDown(1); -UJ?L
} Sbp
file://fixdown aD+0\I[x
private void fixDown(int k) { z9^c]U U)E
int j; ~D*b3K8X
while ((j = k << 1) <= size) { <'W=]IAV
if (j < size %26amp;%26amp; queue[j] j++; ldK>HxM%Z
if (queue[k]>queue[j]) file://不用交换 _Q> "\_,
break; }6<)yW}U
SortUtil.swap(queue,j,k); h5x*NM1Ih
k = j; {W-5:~?"
} w2k<)3 g~
} -<xyC8$^$
private void fixUp(int k) { w nWgy4:
while (k > 1) { ,E%1Uq"
int j = k >> 1; 9e]'OKL+
if (queue[j]>queue[k]) o\&~CW~@~
break; expxp#S
SortUtil.swap(queue,j,k); q1STRYb
k = j; aQga3;S!
} %?Rs*-F.~1
} e]>/H8
yE}BfU {.
} f?Z|>3.2
`N$!s7M
} Tj&'KF8?L
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SortUtil： c!mG1lwD.
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package org.rut.util.algorithm; :VJV5f{
b"Zq0M0l
import org.rut.util.algorithm.support.BubbleSort; s_xV-C#q@
import org.rut.util.algorithm.support.HeapSort; #Gd7M3
import org.rut.util.algorithm.support.ImprovedMergeSort; B=r0?%DX"1
import org.rut.util.algorithm.support.ImprovedQuickSort; TiQ^}5~M
import org.rut.util.algorithm.support.InsertSort; GYd]5`ri
import org.rut.util.algorithm.support.MergeSort; sllzno2bU
import org.rut.util.algorithm.support.QuickSort; ]dq5hkjpU
import org.rut.util.algorithm.support.SelectionSort; te)n{K",
import org.rut.util.algorithm.support.ShellSort; 8`*`nQhWa
\2j|=S6
/** wrabyRjK
* @author treeroot ka#K [qI
* @since 2006-2-2 t}VwVf<K
* @version 1.0 6%E~p0)i%
*/ k}HQq_Y(<
public class SortUtil { "?P[9x}
public final static int INSERT = 1; L@nebT;\'
public final static int BUBBLE = 2; {M[~E|@D
public final static int SELECTION = 3; ^Z#@3=
public final static int SHELL = 4; , |l@j%
public final static int QUICK = 5; wYjQV?,
public final static int IMPROVED_QUICK = 6; ~H u"yAR
public final static int MERGE = 7; .1LPlZ
public final static int IMPROVED_MERGE = 8; ]rnXNn;
public final static int HEAP = 9; I(n }<)eF
p-,Iio+
public static void sort(int[] data) { S.W^7Ap
sort(data, IMPROVED_QUICK); >ukQ, CE~
} (')(d HHW
private static String[] name={ 8aZ$5^z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pxqiv9D<R
}; =-Nsc1&
;\x~'@
private static Sort[] impl=new Sort[]{ wdwp9r
new InsertSort(), qU-!7=}7
new BubbleSort(), 3b@VY'P
new SelectionSort(), };r|}v !~_
new ShellSort(), 1A^1@^{m'
new QuickSort(), Ig9d#c
new ImprovedQuickSort(), g_vm&~U/'
new MergeSort(), GD&htob(
new ImprovedMergeSort(), ZE rdt:w
new HeapSort() CU$)QH{
}; x,\!DLq:p
R*bmu
public static String toString(int algorithm){ B)6#Lp3
return name[algorithm-1]; ,#d[ad<
} `eC+% O
+ubnx{VC
public static void sort(int[] data, int algorithm) { jgq{pZ#E
impl[algorithm-1].sort(data); (sCAR=5v\
} I+" lrU
Xk,>l6vc
public static interface Sort { kYlg4 .~M
public void sort(int[] data); _B[WY
} :6D0j
!y. $J<
public static void swap(int[] data, int i, int j) { \I:.<2i
int temp = data; aMJ;bQD
data = data[j]; qjAh6Q/E`
data[j] = temp; *ik/p
} #tDW!Xv?
} Y)Tl<