[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; Z*kGWL
} i:WHql"Kw_
int i1=l; V/+r"le
int i2=mid+1; a4,bP*H
for(int cur=l;cur<=r;cur++){ Do(7LidC5
if(i1==mid+1) {e2 (
data[cur]=temp[i2++]; uNnwz%w
else if(i2>r) ,ewg3mYHC&
data[cur]=temp[i1++]; +D4Nu+~BSN
else if(temp[i1] data[cur]=temp[i1++]; w\_NrsO!x
else AEi@t0By
data[cur]=temp[i2++]; m7kDxs(KO
} Qd!;CoOmZs
} 44?5]C7
6!bA~"N
} 5d(A(
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改进后的归并排序: a-Cp"pKlVY
fB"3R-H?O
package org.rut.util.algorithm.support; S#+G?I3w
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import org.rut.util.algorithm.SortUtil; *@G4i
/Fh"Gl^
/** [ZURs3q
* @author treeroot Q|gun}
* @since 2006-2-2 2O9dU 5b
* @version 1.0 R^](X*
*/ )gR14a
public class ImprovedMergeSort implements SortUtil.Sort { Lj(hk@
[p!C+|rro
private static final int THRESHOLD = 10; ]02 l!"
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/* 2I?HBz1v
* (non-Javadoc) j#&sZ$HQ4
* Jkm\{;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M=o,Sav5*
*/ 1a4QWGpq
public void sort(int[] data) { +@%9pbM"z
int[] temp=new int[data.length]; V.Xz n
mergeSort(data,temp,0,data.length-1); ~JLqx/[|s
} cw"x0 RS
2y_rsu\
private void mergeSort(int[] data, int[] temp, int l, int r) { J~gfMp.
int i, j, k; f`A
int mid = (l + r) / 2; r-N2*uYtu
if (l == r) f,M$>!$V
return; AV d
if ((mid - l) >= THRESHOLD) @dCu]0oNI
mergeSort(data, temp, l, mid); ^#3$C?d
else gyCb\y+\a
insertSort(data, l, mid - l + 1); $o]zNW;X
if ((r - mid) > THRESHOLD) ;S`Nq%,
mergeSort(data, temp, mid + 1, r); CM5A-R90
else 2z0HB+Y}x
insertSort(data, mid + 1, r - mid); U%k e5uwP
`Q(ac| 0
for (i = l; i <= mid; i++) { Q^MB%L;D
temp = data; yH#;k:O=
} [po+a@ %
for (j = 1; j <= r - mid; j++) { Fa+PN9M`?.
temp[r - j + 1] = data[j + mid]; a _
} qZ\zsOnp
int a = temp[l]; ~d5"<`<^o
int b = temp[r]; _\]D<\St
for (i = l, j = r, k = l; k <= r; k++) { z(\H.P#
if (a < b) { oSa FmP
data[k] = temp[i++]; 34;c00
a = temp; CdaB.xk
} else { >D:S)"
data[k] = temp[j--]; 6{7O
b = temp[j]; XIjSwR kYJ
} GE5@XT
} 4`8.\
} C4 Wdt
3Vw%[+lY9
/** J1R%w{
* @param data &-b=gnT
* @param l -|)[s[T~m
* @param i uqQMS&;+,|
*/ JyB>,t)
private void insertSort(int[] data, int start, int len) { bLV@Ts
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4uftx1o
} t&P5Zw*B
} _)_XO92~
} l?FNYvL
} oC7#6W:@w
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堆排序： t9`NCng 5
dhVwS$O )
package org.rut.util.algorithm.support; <}mT[;:"
@tj0Ir v
import org.rut.util.algorithm.SortUtil; 8OFrW.>[
ZcWl{e4
/** Y}?@Pm drz
* @author treeroot E,6E-9
* @since 2006-2-2 epG;=\f}m`
* @version 1.0 R3@iN&
*/ =oh6;Ojt
public class HeapSort implements SortUtil.Sort{ XdS<51 C
$1dI
/* (non-Javadoc) njq-iU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X4k/7EA
*/ F_r eBPx
public void sort(int[] data) { /uyQ>Y*-\Y
MaxHeap h=new MaxHeap(); 4Dd9cG,lN
h.init(data); D$mrnm4d
for(int i=0;i h.remove(); l:|Fs=\
System.arraycopy(h.queue,1,data,0,data.length); H~~(v52wD
} yv:NH|,/y
>u/yp[Ky
private static class MaxHeap{ (w^&NU'e
`q@~78`
void init(int[] data){ EV(/@kN2
this.queue=new int[data.length+1]; hqds T
for(int i=0;i queue[++size]=data; <QkfvK]Q
fixUp(size); |n|2)hC
} 5-3gsy/Mo
} A"k,T7B
j?mJ1J5
private int size=0; W ,U'hk%
NkJ^ecn%)
private int[] queue; y(S0 2v>l
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public int get() { 2kgm)-z
return queue[1]; 0jzA\$oD
} LPNv4lT[u
|kd^]!_
public void remove() { <qy+@t
SortUtil.swap(queue,1,size--); .iS]aJJ
fixDown(1); xD#/@E1'Y
} .iYgRW=T
file://fixdown @t^2/H ?O
private void fixDown(int k) { $-0u`=!
int j; %51pfuL
while ((j = k << 1) <= size) { >I!(CM":s$
if (j < size %26amp;%26amp; queue[j] j++; Uy_=#&jg
if (queue[k]>queue[j]) file://不用交换 2~4C5@SxL
break; P>kx{^
SortUtil.swap(queue,j,k); 4HHf3j!5
k = j; ;'Q{ ywr
} (j/O=$mJ
} z[rB/|2
private void fixUp(int k) { a&[nVu+
while (k > 1) { \wCL)t.cX
int j = k >> 1; \*N1i`99
if (queue[j]>queue[k]) =e+go ]87x
break; BdKwWgi+a
SortUtil.swap(queue,j,k); `Qhh{
k = j; k$2Y)
} 6GN'rVr!Z
} ;uDFd04w [
] QEw\4M?=
} c9[5)
oEN_,cUp
} ~;W%s
W{h7+X]Y
SortUtil： RW)C<g
L; ~=(
package org.rut.util.algorithm; pi{ahuI#_o
*Tlv'E.M
import org.rut.util.algorithm.support.BubbleSort; 72 6y/o
import org.rut.util.algorithm.support.HeapSort; 8xX{y#
import org.rut.util.algorithm.support.ImprovedMergeSort; 2P=;r:cx
import org.rut.util.algorithm.support.ImprovedQuickSort; HHYcFoJwYN
import org.rut.util.algorithm.support.InsertSort; <*+MBF
import org.rut.util.algorithm.support.MergeSort; ivq4/Y]-X
import org.rut.util.algorithm.support.QuickSort; pDLo`F}A
import org.rut.util.algorithm.support.SelectionSort; @RP|?Xc{?
import org.rut.util.algorithm.support.ShellSort; J\*d4I<(Rt
z)B=<4r
/** >gE_?%a[
* @author treeroot R[c_L=
* @since 2006-2-2 x,%&[6(
* @version 1.0 S@#L!sT`u
*/ -*A'6%`
public class SortUtil { |3LMVN
public final static int INSERT = 1; Q'VS]n
public final static int BUBBLE = 2; Xy{+=UY
public final static int SELECTION = 3; uE$o4X
public final static int SHELL = 4; 4Rn i7qH
public final static int QUICK = 5; }NXESZYoi
public final static int IMPROVED_QUICK = 6; vn<S"
public final static int MERGE = 7; cjXwOk1:s
public final static int IMPROVED_MERGE = 8; y ^\8x^Eg
public final static int HEAP = 9; UQ)}i7v
hA8 zXk/'8
public static void sort(int[] data) { SD&[K 8-i2
sort(data, IMPROVED_QUICK); f-<6T
} 2YyZiOMSc
private static String[] name={ d#\n)eGr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dq(x@&J
}; >g&`g}xZQ
+*V; f,
private static Sort[] impl=new Sort[]{ 7yp*I[1Qf>
new InsertSort(), $#r(1 Ev
new BubbleSort(), 1N+#(<x@,
new SelectionSort(), ^n/uY94E)p
new ShellSort(), IoA;q)
new QuickSort(), BR2y1Hfi
new ImprovedQuickSort(), .IXwa,
new MergeSort(), Q\76jD`m\
new ImprovedMergeSort(), iIFQRnpu;3
new HeapSort() <B`V
}; 4lA+V,#
K^Ht$04
public static String toString(int algorithm){ z"3c+?2
return name[algorithm-1]; (zBQ^97]
} ZAZCvN@5
+$t%L
public static void sort(int[] data, int algorithm) { eXK`%'
impl[algorithm-1].sort(data); 9K|lU:,
} }U9jsm
N6;Z\\&0^q
public static interface Sort { j,XKu5w)Oi
public void sort(int[] data); {rZ"cUm
} WIm7p1U#V
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public static void swap(int[] data, int i, int j) { cy4'q?r
int temp = data; Pc'?p
data = data[j]; N+5^h(~
data[j] = temp; gEP E9ew
} %S.U`(.
} vXbT E$