[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; Nm0|U.<
} ;Ac!"_N?7
int i1=l; zL+M-2hV
int i2=mid+1; jdD`C`w|,
for(int cur=l;cur<=r;cur++){ |y]8gL^
if(i1==mid+1) AIwp2Fz
data[cur]=temp[i2++]; VB+y9$Y'
else if(i2>r) 1i|5ii*vc
data[cur]=temp[i1++]; V#PT.,Xa.
else if(temp[i1] data[cur]=temp[i1++]; |uA /72
else B{Lzgw u;
data[cur]=temp[i2++]; L<N=,~
} $I3}%'`+
} QJH~YV\%
IkLcL8P^
} @%As>X<3t
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改进后的归并排序: =NL(L
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package org.rut.util.algorithm.support; 9\R+g5
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import org.rut.util.algorithm.SortUtil; yu'@gg(
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/** ?CuwA-j
* @author treeroot OxVe}Fym
* @since 2006-2-2 2MKB(;k
* @version 1.0 9C1\?)"D^e
*/ l9$"zEC
public class ImprovedMergeSort implements SortUtil.Sort { !2g*=oY
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private static final int THRESHOLD = 10; )!D,;,aQ
~w$ ^`e!]
/* U#n1N7P|$F
* (non-Javadoc) @yn1#E,
* ]A:G>K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5SHZRF(. 2
*/ &;%LTF@I,
public void sort(int[] data) { E"Y[k8-:2/
int[] temp=new int[data.length]; Ivc/g,
mergeSort(data,temp,0,data.length-1); zO)3MC7l*
} )L7h:%h#
HS 1zA
private void mergeSort(int[] data, int[] temp, int l, int r) { +@yTcz
int i, j, k; +zsB~Vz
int mid = (l + r) / 2; e:WKb9nT
if (l == r) Ne2eBmY}(
return; n]WVT@
if ((mid - l) >= THRESHOLD) vF$sVu|B
mergeSort(data, temp, l, mid); E$E#c8I:
else fUS1`
insertSort(data, l, mid - l + 1); [`|gj
if ((r - mid) > THRESHOLD) q!8aYw+c
mergeSort(data, temp, mid + 1, r); 7a<:\F}E0
else w:[\G%yQ
insertSort(data, mid + 1, r - mid); FO xZkU\e=
l>jNBxB|/A
for (i = l; i <= mid; i++) { 4Y}{?]>pu
temp = data; Z[zRZ2'i5
} >iI-Cs7TD
for (j = 1; j <= r - mid; j++) { $2pkh%
temp[r - j + 1] = data[j + mid]; @7,k0H9Moa
} rW0-XLbL5H
int a = temp[l]; |jTRIMj%,_
int b = temp[r]; : ]~G9]R`
for (i = l, j = r, k = l; k <= r; k++) { ~~3 BV,
if (a < b) { xEqr3(
data[k] = temp[i++]; R"qxT.P(
a = temp; `"qSr%|
} else { XlU`jv+
data[k] = temp[j--]; W v!%'IB
b = temp[j]; ]*vv=@"`e
} 4xD`Z_U
} :5BVVa0oR
} a}/A]mu
8{4jlL;"`?
/** }:hN}*H
* @param data /}$D&KwYg
* @param l v,A8Mk2s#
* @param i PFPZ]XI%F
*/ J`d;I#R%c
private void insertSort(int[] data, int start, int len) { ._US8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +I r
} YS+|n%?
} zqa7!ky
} FWDAG$K@0
} v<tr1cUT
jkfc=O6^
堆排序： RD0=\!w*5
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package org.rut.util.algorithm.support; pt=H?{06
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import org.rut.util.algorithm.SortUtil; qjmlwVw
*VgiJ
/** C0%yGLh&
* @author treeroot SK;c D>)
* @since 2006-2-2 qv.s-@l8
* @version 1.0 3DS&-rN
*/ Iju9#b6
public class HeapSort implements SortUtil.Sort{ F!&$Z .
:"I!$_E'
/* (non-Javadoc) yJ?S7+b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q=`i
*/ |kh7F0';"
public void sort(int[] data) { 0 pPSg9
MaxHeap h=new MaxHeap(); :2(U3~3:
h.init(data); 8zzY;3^h;
for(int i=0;i h.remove(); `(o:;<&3
System.arraycopy(h.queue,1,data,0,data.length); -]kvM
} 6#(==}Sm+
V(3=j)#
private static class MaxHeap{ ~"nF$DB
6-J%Z%yT #
void init(int[] data){ 6g&Ev'
this.queue=new int[data.length+1]; 'Uu!K!
for(int i=0;i queue[++size]=data; )4e?-?bK!
fixUp(size); AS'%Md&I
} Ws*UhJY<GS
} =a^}]k}
:B 9>
private int size=0; p;n"zr8U
2v?fbrC5c
private int[] queue; {Bw
JK'FJ}Z4
public int get() { l~Rd\.O
return queue[1]; yr/G1?k%ML
} X)b@ia'"Wp
7B{LRm6;Vu
public void remove() { d=d*:<Zx
SortUtil.swap(queue,1,size--); 7oV$TAAf
fixDown(1); lgQ"K(zY
} chA7R'+LA
file://fixdown Xli$4 uL
private void fixDown(int k) { a|eHo%Qt
int j; W!t=9i
while ((j = k << 1) <= size) { ble[@VW|
if (j < size %26amp;%26amp; queue[j] j++; +FJ+,|i
if (queue[k]>queue[j]) file://不用交换 y7~y@2
break; o&ETs)n|
SortUtil.swap(queue,j,k); TQ5*z,CkS
k = j; ,8G6q_ud
} T7~H|%
} @L?KcGD
private void fixUp(int k) { '8w>=9Xl
while (k > 1) { AX;!-|bW
int j = k >> 1; I>JBGR`j
if (queue[j]>queue[k]) F<TIZ^gFP
break; #ADm^UT^
SortUtil.swap(queue,j,k); ohna1a^
k = j; qsWy <yL+
} 75^AO>gt
} 5Deo}(3
ez<V
} 0TWd.+
g5:?O,?
} 'S%H"W\
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SortUtil： $Da?)Hz'F
L Q0e@5
package org.rut.util.algorithm; L Iz<fB
7>lM^ :A
import org.rut.util.algorithm.support.BubbleSort; .F},Z[a&
import org.rut.util.algorithm.support.HeapSort; [h63*&
import org.rut.util.algorithm.support.ImprovedMergeSort; Z7XFG&@6
import org.rut.util.algorithm.support.ImprovedQuickSort; T.}Y&,n$$5
import org.rut.util.algorithm.support.InsertSort; @ Fkhida
import org.rut.util.algorithm.support.MergeSort; rld8hFj
import org.rut.util.algorithm.support.QuickSort; Z\3~7Ek2m
import org.rut.util.algorithm.support.SelectionSort; {$g3R@f^~
import org.rut.util.algorithm.support.ShellSort; AVi&cvhs
nvQTJ4,,
/** )$ M2+_c
* @author treeroot LhRd0
* @since 2006-2-2 Swr4De_5
* @version 1.0 QQJf;p7
*/ -}3nIk<N
public class SortUtil { h:RP/0E
public final static int INSERT = 1; }i{A4f`
public final static int BUBBLE = 2; TJCE6QG
public final static int SELECTION = 3; LUdXAi"f
public final static int SHELL = 4; !_P&SmK3
public final static int QUICK = 5; RdBIbm
public final static int IMPROVED_QUICK = 6; u4j"U6"]M
public final static int MERGE = 7; Y>6N2&Q
public final static int IMPROVED_MERGE = 8; )2a)$qx;
public final static int HEAP = 9; pX+4B=*
S$ffTdRz
public static void sort(int[] data) { :V1j*)
sort(data, IMPROVED_QUICK); tI)|y?q
} _n1[(I
private static String[] name={ "VDMO^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Al=ByX@
}; B"8jEYT5
t)1`^W}
private static Sort[] impl=new Sort[]{ 1yVhO2`7]
new InsertSort(), w2db=9
new BubbleSort(), j#0JD!Vr
new SelectionSort(), F1A40h7R$Y
new ShellSort(), 1ktxG1"1
new QuickSort(), TJ1h[
new ImprovedQuickSort(), Wy%FF\D.Y
new MergeSort(), 6$[7hlE
new ImprovedMergeSort(), U*b7 Pxq;
new HeapSort() Z?xRSi2~7
}; IVY)pS"pR"
@{W"mc+
public static String toString(int algorithm){ R0%M9;>1
return name[algorithm-1]; u"4B5D
} Evd|_W-
cPv(VjS1;
public static void sort(int[] data, int algorithm) { bf|ePGW?
impl[algorithm-1].sort(data); 3~VV2O
} @S=9@3m{w;
K`2(Q
public static interface Sort { yM~bUmSg
public void sort(int[] data); FWA?mde
} $1g1Bn
C!|LGzs0
public static void swap(int[] data, int i, int j) { z;!"i~fFK
int temp = data; rtfRA<
data = data[j]; 2,wwI<=E'
data[j] = temp; N<1+aL\
} <Se9aD
} 2?SbkU/3|P