[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; ZS&>%G
} RO.GD$ 3n
int i1=l; !_EL{/ko
int i2=mid+1; >Y,3EI\
for(int cur=l;cur<=r;cur++){ n.9k<
if(i1==mid+1) Sc!]M 5
data[cur]=temp[i2++]; dQP7CP
else if(i2>r) _ nFsC
data[cur]=temp[i1++]; :sO^b*e /
else if(temp[i1] data[cur]=temp[i1++]; }xhat,9
else bz5",8Mn
data[cur]=temp[i2++]; E.~;
} 0zH^yx:ma
} Xc)V;1
1K(a=o[Ce
} 7C~qAI6Eg
x1H?e8
改进后的归并排序: >6 p <n
]MI>"hn
package org.rut.util.algorithm.support; "s[Y$!#
jvfVB'Tmr
import org.rut.util.algorithm.SortUtil; w\(LG_n|
85;hs
/** Jt-s6-2
* @author treeroot 'p0|wM_
* @since 2006-2-2 g7*"*%v 2
* @version 1.0 oh%kuO T[
*/ si`{>e~`6P
public class ImprovedMergeSort implements SortUtil.Sort { e<_yr>9g"
Eu%19s;u
private static final int THRESHOLD = 10; b1X.#pz7F
`D2wlyqO6
/* E>_?9~8Mf
* (non-Javadoc) _W@SCV)yH
* X`,4pSQ;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NF?FEUoxz
*/ 6yIl)5/=
public void sort(int[] data) { &5*)r@+
int[] temp=new int[data.length]; :V)W?~Z7B
mergeSort(data,temp,0,data.length-1); fX.V+.rj
} iEDZ\\,
e"jA#Y #
private void mergeSort(int[] data, int[] temp, int l, int r) { "|1MJuY_6
int i, j, k; eiLtZQ
int mid = (l + r) / 2; doR'E=Z4h
if (l == r) Salu[)+?
return; ,gU%%>-_~w
if ((mid - l) >= THRESHOLD) jgiP2k[Xom
mergeSort(data, temp, l, mid); 3YY<2<
else o?G^=0T
insertSort(data, l, mid - l + 1); ?$O5w*
if ((r - mid) > THRESHOLD) ++KY+j.^
mergeSort(data, temp, mid + 1, r); `[+9n2j
else X,- ' v[z
insertSort(data, mid + 1, r - mid); 0Sz&Oguv
!g? ~<`
for (i = l; i <= mid; i++) { DSwF }
temp = data; Y^)VHE]
} T7;)HFGeW
for (j = 1; j <= r - mid; j++) { k&nhF9Y4
temp[r - j + 1] = data[j + mid]; uo1G
} Tb-`0^y&X1
int a = temp[l]; =goZI67
int b = temp[r]; MDkIaz\U
for (i = l, j = r, k = l; k <= r; k++) { CvpqQ7&k7
if (a < b) { -_jV.`t
data[k] = temp[i++]; F"a^`E&
a = temp; mRCgKW<
} else { $Z;HE/3
data[k] = temp[j--]; nf< <]iHf
b = temp[j]; (PYUfiOf
} ]\nG1+ta
} .}fc*2.'
} *D1fSu!
*8p\.za1
/** PF.sM(
* @param data u)P$xkf
* @param l hMJ \a
* @param i ^F*)Jq
*/ _lQ+J=J$.R
private void insertSort(int[] data, int start, int len) { +N[dYm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [Hdk=p
} Xi5kE'_
} hvBuQuk)
} v\Y;)/!
} ;hs:wLVa"
+!POKr
堆排序： rOY^w9!
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package org.rut.util.algorithm.support; qn@Qd9Sf
`n-e.{O((
import org.rut.util.algorithm.SortUtil; F dv&kK!
~E^EF{h
/** if5Y!Tx?G
* @author treeroot ?l,i(I
* @since 2006-2-2 "EpE!jh
* @version 1.0 JXj`
*/ sSG]I%oB3
public class HeapSort implements SortUtil.Sort{ ?p5RSt
"4"\tM(
/* (non-Javadoc) c%~'[W04\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3:Co K#
*/ ! # tRl
public void sort(int[] data) { j<deTK;.
MaxHeap h=new MaxHeap(); @7lZ{jV$
h.init(data); C`mXEX5
for(int i=0;i h.remove(); B_5q}Bp<
System.arraycopy(h.queue,1,data,0,data.length); *MagicA
} Wc3!aLNx
n+GCL+Mo
private static class MaxHeap{ j{_MDE7N
4d]
void init(int[] data){ s*9tWSd
this.queue=new int[data.length+1]; 88j ;7
for(int i=0;i queue[++size]=data; nW_
fixUp(size); !X8R
} BkfBFUDQ
} Uzn|)OfWP
j.}V~Sp*
private int size=0; I "2FTGA
Kj 8 W
private int[] queue; :t^})%
u_8 22Z
public int get() { s= fKAxH
return queue[1]; y3]"H(
} pNFIO t:(
vKC&Qi ;
public void remove() { pH%c7X/[3L
SortUtil.swap(queue,1,size--); v6\2mc.
fixDown(1); )du{ZWr
} J*X.0&Toc
file://fixdown h_yR$H&tX
private void fixDown(int k) { z{L;)U B^
int j; _|:bac8pL
while ((j = k << 1) <= size) { F@bCm+z-
if (j < size %26amp;%26amp; queue[j] j++; ,z)NKt#
if (queue[k]>queue[j]) file://不用交换 'LLx$y.Ei[
break; 86F+N_>Z
SortUtil.swap(queue,j,k); *+4iBpyiB
k = j; $yFuaqG`Wo
} 2{Iz
} ^3o8F
private void fixUp(int k) { '|N4fbZd
while (k > 1) { jdf)bO(9#
int j = k >> 1; D D;+& fe
if (queue[j]>queue[k]) RyWOiQk;
break; g 'a?
SortUtil.swap(queue,j,k); d|+jCTKS
k = j; x>"JWD
} 3|r!*+.
} .OS?^\
}QW~.>`
} VhIIW"1
-f|^}j?
} psy(]Pf
"gajBY
SortUtil： ={@ @`yP^$
Ny7=-]N4{"
package org.rut.util.algorithm; Y6?mY!
&\`a5[
import org.rut.util.algorithm.support.BubbleSort; xWe1F2nY
import org.rut.util.algorithm.support.HeapSort; zRE8299%z
import org.rut.util.algorithm.support.ImprovedMergeSort; lT!$\E$1
import org.rut.util.algorithm.support.ImprovedQuickSort; <O)X89dFM
import org.rut.util.algorithm.support.InsertSort; YkAWKCOni
import org.rut.util.algorithm.support.MergeSort; )r,R!8
import org.rut.util.algorithm.support.QuickSort; 7+hF;
import org.rut.util.algorithm.support.SelectionSort; +Z~!n
import org.rut.util.algorithm.support.ShellSort; 2$W,R/CLh
a{Hb7&
/** JP,(4h*
* @author treeroot jP.b oj_u*
* @since 2006-2-2 ~G:2iSi(#
* @version 1.0 c1AG3Nb
*/ [67E5rk-
public class SortUtil { >AX~c jo
public final static int INSERT = 1; Cm<j*Cnl
public final static int BUBBLE = 2; bKMR7&e.Ep
public final static int SELECTION = 3; (yAvDyJOn
public final static int SHELL = 4; ?&<o_/`-H5
public final static int QUICK = 5; 5~%,u2
public final static int IMPROVED_QUICK = 6; po2[uJ
public final static int MERGE = 7; HGQ?(2]8$
public final static int IMPROVED_MERGE = 8; 4zfRD`;
public final static int HEAP = 9; X8SRQO^
O:=|b]t
public static void sort(int[] data) { ie~fQ!rf
sort(data, IMPROVED_QUICK); VMye5 P
} sqpOS!]
private static String[] name={ )!}-\5F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1LId_vJtJ
}; ^0tf1pV2
oYh<k
private static Sort[] impl=new Sort[]{ 5H:~6z
new InsertSort(), $K_YC~
new BubbleSort(), :{WrS
new SelectionSort(), [kuVQ$)
new ShellSort(), 6+B{4OY
new QuickSort(), 87pXv6'FQ
new ImprovedQuickSort(), cI%"Ynq"3
new MergeSort(), ;y~{+{{Ow
new ImprovedMergeSort(), 1S(\2{Ylo
new HeapSort() H9san5{
}; u|OzW}xb7j
@6 ;oN
public static String toString(int algorithm){ ]dbSa1?
return name[algorithm-1]; ta4JWllf
} jWK@NXMH
o!toO&=
public static void sort(int[] data, int algorithm) { rx6-~0!eI=
impl[algorithm-1].sort(data); I' ! r
} {s8U7rmML
JYg% ~tW'
public static interface Sort { t.E4Tqzc>
public void sort(int[] data); wLOQhviI^-
} { 8f+h
jH&_E'XMX
public static void swap(int[] data, int i, int j) { M6jp1:ZH2q
int temp = data; @<OO
data = data[j]; 4j@i%
data[j] = temp; K/2.1o;9
} 3xzkZ8]/
} JS/M~8+Et