[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; t/*K#]26
} 7+a%ehwU
int i1=l; F>QT|
int i2=mid+1; `f+8WPJPZ
for(int cur=l;cur<=r;cur++){ dBMe`hM)
if(i1==mid+1) *fl{Y(_OO
data[cur]=temp[i2++]; 6#)Jl
else if(i2>r) T_x+sv=|X!
data[cur]=temp[i1++]; WYC1rfd=
else if(temp[i1] data[cur]=temp[i1++]; As+;qNO
else N 2"3~ #
data[cur]=temp[i2++]; W/r mm*
} {?/8jCVd
} `GQiB]Z
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} ZJ9Jf2 c
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改进后的归并排序: VL7S7pb_
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package org.rut.util.algorithm.support; So=nB} b[?
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import org.rut.util.algorithm.SortUtil; Q*:h/Lhb&
D*cyFAF
/** DMQNr(w{!2
* @author treeroot Dk`4bYK
* @since 2006-2-2 }@14E-N=
* @version 1.0 ;}WtJ&y=M
*/ P-+M,>vNy[
public class ImprovedMergeSort implements SortUtil.Sort { ZSXRzH~0
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private static final int THRESHOLD = 10; FKox0Jmh=
@?Gw|bP
/* TH>?Gi)"
* (non-Javadoc) o8'Mks
* 7wQ+giu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xegQRc
*/ t0bhXFaiE
public void sort(int[] data) { abo>_"9-
int[] temp=new int[data.length]; r]8x;v1
mergeSort(data,temp,0,data.length-1); 0\'Q&oTo
} 3e%l8@R@
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private void mergeSort(int[] data, int[] temp, int l, int r) { 2;4]PRD6w
int i, j, k; <!~1{`n%9J
int mid = (l + r) / 2; @VC .>
if (l == r) %{7_E*I@n
return; FgWkcV6B
if ((mid - l) >= THRESHOLD) 0+}EA[
mergeSort(data, temp, l, mid); KQ4kZN
else Pr5g6I'G
insertSort(data, l, mid - l + 1); " ^HK@$
if ((r - mid) > THRESHOLD) m_m8c8{Y
mergeSort(data, temp, mid + 1, r); I7dm \|#
else zb;(?!Bd#
insertSort(data, mid + 1, r - mid); Q(|PZng
o)%-l4S
for (i = l; i <= mid; i++) { ,-(T"Ph<
temp = data; id;#{O$
} b96t0w!cs
for (j = 1; j <= r - mid; j++) { kmlG3hOR,
temp[r - j + 1] = data[j + mid]; NoCDY2 $
} R9Sf!LR
int a = temp[l]; /l,+oG%\
int b = temp[r]; ?P""KVpo
for (i = l, j = r, k = l; k <= r; k++) { )bLGEmm
if (a < b) { "1XXE3^^
data[k] = temp[i++]; VG_uxKY
a = temp; +0XL5('2
} else { =db'#m{$
data[k] = temp[j--]; I@0z/4H``
b = temp[j]; zoZ<)x=;
} ic*->-!
} 8!4~T,9G
} ~;M)qR?]W
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/** *jk3 \KaoV
* @param data &?.n2+T+ =
* @param l vBh;
* @param i Go>wo/Sb
*/ I|,pE**T
private void insertSort(int[] data, int start, int len) { @$qOW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z`k El@
} No`|m0 :j
} 0QMTIAW6h
} >Z+"`"^o}
} Q [rj
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堆排序： O: ,$%
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package org.rut.util.algorithm.support; 10wvfRhng
?X\3&Ujy$
import org.rut.util.algorithm.SortUtil; `|$'g^eCL
>i "qMZ
/** =p<?Hu
* @author treeroot lVPOYl%
* @since 2006-2-2 t, U) ~wi
* @version 1.0 *GQDfs`m
*/ %*wzO9w4
public class HeapSort implements SortUtil.Sort{ `79[+0hL'
B:4Ka]{YO
/* (non-Javadoc) u!Xb?:3uj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) & _; y.!
*/ YT>KJ
public void sort(int[] data) { z{S:X:X
MaxHeap h=new MaxHeap(); xfjd5J7'
h.init(data); E2@`d6
for(int i=0;i h.remove(); ^+ZgWS^%
System.arraycopy(h.queue,1,data,0,data.length); .%=V">R
} qnB<k,8T
Xka<I3UD5
private static class MaxHeap{ kv6Cp0uFg
~h-C&G,v
void init(int[] data){ [J^
this.queue=new int[data.length+1]; Cyq?5\a
for(int i=0;i queue[++size]=data; -LtK8wl^
fixUp(size); m9in1RI%
} pkJ/oT
} .evbE O5
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private int size=0; E<tK4?i"
0RUi\X4HI
private int[] queue; \v+u;6cx_
~#R9i^Y
public int get() { "#yJHsu]
return queue[1]; Ko6^iI1
} EIjI!0j
: [q0S@
public void remove() { 'OwyyPBF
SortUtil.swap(queue,1,size--); #B8*gFZB
fixDown(1); A /(lKq
} e,>%Z@92(
file://fixdown v,=v
private void fixDown(int k) { Lxv6!?v|
int j; a5@z:i
while ((j = k << 1) <= size) { >nzu],U
if (j < size %26amp;%26amp; queue[j] j++; UiH!Dl}<
if (queue[k]>queue[j]) file://不用交换 oH^(qZ8W
break; %Y]=1BRk}
SortUtil.swap(queue,j,k); (D<(6?
k = j; NQfYxB1Yr:
} O.,3|
} hfqqQ!,l!
private void fixUp(int k) { ~*M$O&
while (k > 1) { r> k-KdS
int j = k >> 1; "g>.{E5
if (queue[j]>queue[k]) ~e `Bq>
break; KzjC/1sd
SortUtil.swap(queue,j,k); 8"%RCE
k = j; K_~h*Yc
} <[Q3rJ
} *)<B0SjT
<F;v`h|+S
} D-2.fjo9!
7Vu?
} qH>`}/,P
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SortUtil： eujK4s
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package org.rut.util.algorithm; hA}~es=c
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import org.rut.util.algorithm.support.BubbleSort; %ft &Q
import org.rut.util.algorithm.support.HeapSort; eg/<[ A:
import org.rut.util.algorithm.support.ImprovedMergeSort; MP^ d}FL
import org.rut.util.algorithm.support.ImprovedQuickSort; AH#4wPxF
import org.rut.util.algorithm.support.InsertSort; b0v:12q
import org.rut.util.algorithm.support.MergeSort; ;{#^MD MB
import org.rut.util.algorithm.support.QuickSort; 26I
import org.rut.util.algorithm.support.SelectionSort; foRD{Hx
import org.rut.util.algorithm.support.ShellSort; Os&n
Su8|R"qU
/** FOwnxYGVf
* @author treeroot {sVY`}p|
* @since 2006-2-2 6Wj^*L!
* @version 1.0 &Lm-()wb
*/ 7y^%7U \
public class SortUtil { 0Yl4eB-
public final static int INSERT = 1; ^Hrn ]
public final static int BUBBLE = 2; 6"/WZmOp
public final static int SELECTION = 3; KS}hU~
public final static int SHELL = 4; ^/U27B
public final static int QUICK = 5; vxFTen{-F
public final static int IMPROVED_QUICK = 6; @%/]Q<<q
public final static int MERGE = 7; o:S0*
public final static int IMPROVED_MERGE = 8; mYxyWB
public final static int HEAP = 9; dq\FBwfe
6at1bQ$
public static void sort(int[] data) { bWWXc[O2&(
sort(data, IMPROVED_QUICK); %FZ2xyI.
} 6e,xDr
private static String[] name={ .IarkeCtb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6$U]9D
}; /./"x~@
[AU II*:}
private static Sort[] impl=new Sort[]{ `B/0iA
new InsertSort(), i;/xK=L
new BubbleSort(), e~l#4{w
new SelectionSort(), ;U9J++\d<A
new ShellSort(), XV3C`:b
new QuickSort(), m: n`g1
new ImprovedQuickSort(), $ _j[2EU
new MergeSort(), h4|i%,f
new ImprovedMergeSort(), rxnFrx
new HeapSort() \Ig68dFf%
}; >Fio;cn?
XfPFo6
public static String toString(int algorithm){ o+w;PP)+=
return name[algorithm-1]; (jjTK'0[
} (*}yjUYLZ
S$)*&46g
public static void sort(int[] data, int algorithm) { >Y7a4~ufko
impl[algorithm-1].sort(data); $rIoHxh. y
} z]B]QB Y[
f()FY<b
public static interface Sort { $`ZzvZ'r
public void sort(int[] data); 32DbNEk
} zgx&Pte
L`f^y;Y.
public static void swap(int[] data, int i, int j) { U,#yqER'r
int temp = data; > fnh+M
data = data[j]; *IgE)N>
data[j] = temp; De7Ts
} =4V&*go*\
} ZkL8e