[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; / _-?NZ
} b\"JXfw
int i1=l; 2sjV*\Udf
int i2=mid+1; k# ZO4
for(int cur=l;cur<=r;cur++){ -o6K_R}R
if(i1==mid+1) h|mh_T{+
data[cur]=temp[i2++]; 52/^>=t
else if(i2>r) "d/x`Dx
data[cur]=temp[i1++]; ik_Ll|
else if(temp[i1] data[cur]=temp[i1++]; 724E(?>J
else }E[S%W[
data[cur]=temp[i2++]; ;" '`P[
} 0!o&=Qh
} \=v7'Hp
XUfj 0
} R0_%M
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改进后的归并排序: U%"c@%B0
[{ K$sd
package org.rut.util.algorithm.support; nORm7sa9
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import org.rut.util.algorithm.SortUtil; ae{%* \J
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/** E@hvO%
* @author treeroot <w+K$WE {
* @since 2006-2-2 fxXZ^#2wX
* @version 1.0 ^;$a_eR
*/ ?W1( @.
public class ImprovedMergeSort implements SortUtil.Sort { E).Nu
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private static final int THRESHOLD = 10; {tk42}8k
5'?K(Jdmp
/* bT,]=h"0
* (non-Javadoc) U PGS
* L qMH]W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]MfT5#(6h
*/ `]_#_
public void sort(int[] data) { J1YP-:
int[] temp=new int[data.length]; ,m{Zn"?kS
mergeSort(data,temp,0,data.length-1); ]L^X}[SH
} R#1h.8
`22F@JYN
private void mergeSort(int[] data, int[] temp, int l, int r) { F4M<5Yi
int i, j, k; &`0y<0z
int mid = (l + r) / 2; Z 3m5DK
if (l == r) `XB(d@%
return; *eH[~4
if ((mid - l) >= THRESHOLD) -i:Zi}f
mergeSort(data, temp, l, mid); {kD|8["Ie'
else R}8!~Ma`|
insertSort(data, l, mid - l + 1); `LVItP(GUM
if ((r - mid) > THRESHOLD) &7,Kv0j}
mergeSort(data, temp, mid + 1, r); CSRcTxH
else z,87;4-
insertSort(data, mid + 1, r - mid); }N#jA yp!
s7tNAj bgD
for (i = l; i <= mid; i++) { 15x~[?!
temp = data; p )etl5
} ba1zu|@w
for (j = 1; j <= r - mid; j++) { ah>;wW!6/
temp[r - j + 1] = data[j + mid]; ,u-i9`B
} fCJ:QK!
int a = temp[l]; Mou>|U1e"
int b = temp[r]; |#^u%#'[2
for (i = l, j = r, k = l; k <= r; k++) { "KcSOjvJ
if (a < b) { Z=|:D,&
data[k] = temp[i++]; t~)w921>
a = temp; wr~# rfH
} else { MIub^ $<C
data[k] = temp[j--]; U O YM
b = temp[j]; lfOF]Kiqr
} 5]:fkx
} D06'"
} @C0{m7q
) 2wof(
/** I?c# T Rm
* @param data Y\(Q
* @param l q{n~v>wU
* @param i 0\qbJ
*/ QxwZ$?w%
private void insertSort(int[] data, int start, int len) { sl}bNzT#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gn<s>3E
} yd]W',c
} _*0!6?c
} w{#K.dx
} kpsus \T
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堆排序： 30-XFl
#.$p7]
package org.rut.util.algorithm.support; rtS(iD@B"
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import org.rut.util.algorithm.SortUtil; Qf6]qJa|
rV<yM$IA
/** 2P`hdg
* @author treeroot KV k 36;$
* @since 2006-2-2 12gcma}
* @version 1.0 PPU,o8E+
*/ kG[u$[B
public class HeapSort implements SortUtil.Sort{ yBXdj`bV
^:5;H=.
/* (non-Javadoc) oZHsCQ%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sw6]Bc
*/ A-aukJg9
public void sort(int[] data) { /k|y\'<
MaxHeap h=new MaxHeap(); 'uGn1|Pvy
h.init(data); \9geDX9A
for(int i=0;i h.remove(); {wih)XNY
System.arraycopy(h.queue,1,data,0,data.length); =>-:o:Cu{
} 1"RO)&
v*7}ux8
private static class MaxHeap{ (/14)"Sk
K{B[(](
void init(int[] data){ DNcf2_m
this.queue=new int[data.length+1]; U 3aY =8B
for(int i=0;i queue[++size]=data; @\e2Q&O
fixUp(size); d&&^_0O
} 4ZrX=e,
} hC4##pAa
kIWQ _2
private int size=0; 8G`fSac`
}BlVLf%C
private int[] queue; u7ZSs-LuHw
wo5"f}vd#
public int get() { v~[=|_{
return queue[1]; v3x_8n$C9
} dqwAQ-x
Z)<ljW
public void remove() { _Isju S
SortUtil.swap(queue,1,size--); SL zL/5s
fixDown(1); @Iia>G@Rz
} }OZ%U2PU
file://fixdown U+CZv1
private void fixDown(int k) { C=2
int j; Iz*'
while ((j = k << 1) <= size) { f9W@!]LHJ
if (j < size %26amp;%26amp; queue[j] j++; UX}ZE.cV
if (queue[k]>queue[j]) file://不用交换 k(+EY%
break; Vcz ExP
SortUtil.swap(queue,j,k); <k-&Lh:o3
k = j; =o^oMn
} 8ME_O~,N
} 2~Z P[wr
private void fixUp(int k) { FPE[}
while (k > 1) { YHAhF@&
int j = k >> 1; Y*/:IYr`
if (queue[j]>queue[k]) 3?iRf6;n
break; E;.<'t>
SortUtil.swap(queue,j,k); ~KHGh29
k = j; ,#hS#?t
} OJPxV~y
} }-?_c#G3
t}>6"^}U
} *%5.{J!
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} _p<W
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SortUtil： 6d&dB
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package org.rut.util.algorithm; ,l^; ZE
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import org.rut.util.algorithm.support.BubbleSort; p \A^kX^5
import org.rut.util.algorithm.support.HeapSort; o%XAw
import org.rut.util.algorithm.support.ImprovedMergeSort; kW0|\
import org.rut.util.algorithm.support.ImprovedQuickSort; DP ,owk
import org.rut.util.algorithm.support.InsertSort; c ]M!4.
import org.rut.util.algorithm.support.MergeSort; ~XQj0'
import org.rut.util.algorithm.support.QuickSort; fgIzT!fyz
import org.rut.util.algorithm.support.SelectionSort; va F^[/ (g
import org.rut.util.algorithm.support.ShellSort; =Ryh@X&
M]4qS('[
/** ,r~pf(nz
* @author treeroot teH.e!S
* @since 2006-2-2 )w(-Xc?P
* @version 1.0 4Xt.}S!
*/ }tA77Cm)45
public class SortUtil { j hf%ze
public final static int INSERT = 1; H^z6.!$m
public final static int BUBBLE = 2; (oTtnQ""+
public final static int SELECTION = 3; QxZYy}2
public final static int SHELL = 4; <9z2:^
public final static int QUICK = 5; (8qD'(@
public final static int IMPROVED_QUICK = 6; piKYO+;W'
public final static int MERGE = 7; &oI;^|
public final static int IMPROVED_MERGE = 8; L;N)l2m.\
public final static int HEAP = 9; Q%)da)0:c
#$7d1bx
public static void sort(int[] data) { Xu\FcQ{
sort(data, IMPROVED_QUICK); 12qX[39/
} lx_jy>$}r
private static String[] name={ vVB8zS~l ,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `>KB8SY:qK
}; XgL-t~_
jkCa2!WQ'i
private static Sort[] impl=new Sort[]{ V'?bZcRr~
new InsertSort(), {R<0'JU
new BubbleSort(), H8.Aq\2S
new SelectionSort(), J&Ig%&/
new ShellSort(), "#,]`ME;
new QuickSort(), YHBH9E/B
new ImprovedQuickSort(), j_H"m R
new MergeSort(), g(Q)fw
new ImprovedMergeSort(), ?.Mw
new HeapSort() ERD( qL.J
}; f$#--*
gS{hfDpk,h
public static String toString(int algorithm){ %N+8K
return name[algorithm-1]; _RI`I}&9Z
} *+|D8xp
mU0j K@^&M
public static void sort(int[] data, int algorithm) { qQK0s*^W
impl[algorithm-1].sort(data); v0uDL7
} -OV:y],-
6[3oOO:uo
public static interface Sort { \yt-_W=[
public void sort(int[] data); s zBlyT
} S}L$-7Ct
r:pS[f|4\
public static void swap(int[] data, int i, int j) { d&[Ct0!++u
int temp = data; `! ~~Wf'
data = data[j]; v:/+OzY
data[j] = temp; JxI\ss?O
} 1EE4N\
} 3sr>?/>: