[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; Cx(HsJ!,
} JPT&!%~
int i1=l; U'5p;j)_
int i2=mid+1; lu.xv6+
for(int cur=l;cur<=r;cur++){ F3Vvqt*2
if(i1==mid+1) U;.cXU{
data[cur]=temp[i2++]; DX3jE p2
else if(i2>r) 2%fkXH<
data[cur]=temp[i1++]; \B/( H)Cd*
else if(temp[i1] data[cur]=temp[i1++]; (lYC2i_b#
else l`0JL7
data[cur]=temp[i2++]; {"|GV~
} 5y0LkuRR:
} ;tD?a7
EmP2r*"rb
} P:XX8&#
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改进后的归并排序: c No)LF
|?' gT"#
package org.rut.util.algorithm.support; ND 8;1+3
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import org.rut.util.algorithm.SortUtil; 'e x/IqbK
T[0CD'|E
/** "6?Y$y/wm
* @author treeroot =<=[E:B
* @since 2006-2-2 )In;nc
* @version 1.0 .J5or
*/ NH1|_2
public class ImprovedMergeSort implements SortUtil.Sort { n=!5ha%#N
)s 1 Ei9J
private static final int THRESHOLD = 10; c1f`?i}.
Uf[Gs/!NV
/* %-!:$ 1;
* (non-Javadoc) /h&>tYVio
* ZhoB/TgdL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wYHyVY2tj2
*/ )GC[xo4bg
public void sort(int[] data) { aO\@5i_r
int[] temp=new int[data.length]; dUceZmAl
mergeSort(data,temp,0,data.length-1); DshRH>7s8
} E@="n<uS
U.WMu%
private void mergeSort(int[] data, int[] temp, int l, int r) { D%'rq
int i, j, k; #M[Cq= 2
int mid = (l + r) / 2; N9f;X{
if (l == r) Ahg6>7+R.
return; kRzqgVr%
if ((mid - l) >= THRESHOLD) P'Jb')m
mergeSort(data, temp, l, mid); G&0JK ,Y
else UZc{ Av
insertSort(data, l, mid - l + 1); 0j'k%R[l
if ((r - mid) > THRESHOLD) N_.`5I;e
mergeSort(data, temp, mid + 1, r); (W`=`]!
else |qibO \_
insertSort(data, mid + 1, r - mid); V3\}]5
FC8= ru
for (i = l; i <= mid; i++) { NsSl|m
temp = data; ?[O Sy.6
} l{\@+m
for (j = 1; j <= r - mid; j++) { n8e}8.Bu
temp[r - j + 1] = data[j + mid]; 3Q+THg3~?
} qSL~A-
int a = temp[l]; l)1ySX&BU
int b = temp[r]; Nx(y_.I{K
for (i = l, j = r, k = l; k <= r; k++) { f^XfIH_#
if (a < b) { !r0 z3^*N
data[k] = temp[i++]; /lvH p
a = temp; UC9w T
} else { HR k^KB
data[k] = temp[j--]; VoUAFEcs
b = temp[j]; C?b_E
} g\,HiKBXd
} \3z^/F~
} Hn(L0#Oqy
%G~%:uJ5
/** =CO#Q$
* @param data "[]72PC
* @param l af7\2g3*
* @param i ~E7=c3:"
*/ >E(IkpZ
private void insertSort(int[] data, int start, int len) { *W<g%j-a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tZY(r {
} wsfn>w?!V
} q|ZQsFZ
} ^S`c-N
} We#O'm
KY;E.D`
堆排序： W?auY_+P
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package org.rut.util.algorithm.support; (z<&PP
#bLeK$
import org.rut.util.algorithm.SortUtil; [kq+a]q
uH!;4@uI
/** "7a;Apq*
* @author treeroot rB%acTCz=[
* @since 2006-2-2 Q1@V?`rkS{
* @version 1.0 #9Dixsl*Q
*/ }vdhk0
public class HeapSort implements SortUtil.Sort{ =u`^QE
Y3I+TI>x
/* (non-Javadoc) I"+;L4o`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <%rG*vzi
*/ ^k?Ig.m
public void sort(int[] data) { =2[cpF]
MaxHeap h=new MaxHeap(); 2myHn/%C
h.init(data); <)(STo
for(int i=0;i h.remove(); dmD':1
System.arraycopy(h.queue,1,data,0,data.length); C_Z[ul
} #S4{,
21U,!
private static class MaxHeap{ 7uRXu>h
a|@^N
void init(int[] data){ . RNQlh3
this.queue=new int[data.length+1]; `ja**re
for(int i=0;i queue[++size]=data; XA:v:JFS
fixUp(size); fXYg %
} <%Re!y@OL
} aOj5b>>
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private int size=0; U(=cGA.$
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private int[] queue; RyxIJJui
1]v.Qu<
public int get() { "U&
return queue[1]; UvOB`Vj
} x_\e&"x
@cF aYI
public void remove() { '?k*wEu
SortUtil.swap(queue,1,size--); B9^@]
fixDown(1); Jj'~\j
} *(x`cf;k
file://fixdown l+Tw#2s$
private void fixDown(int k) { %zB `Sd<
int j; w]\O3'0Js
while ((j = k << 1) <= size) { |L7 `7!Z
if (j < size %26amp;%26amp; queue[j] j++; (byFr9z
if (queue[k]>queue[j]) file://不用交换 '5eW"HGU]`
break; vV|u+v{
SortUtil.swap(queue,j,k); sT3O_20{
k = j; @Tzh3,F2
} uU>Bun
} Rj%q)aw'
private void fixUp(int k) { }o?@
while (k > 1) { DP*[t8
int j = k >> 1; 8\t~*@"
if (queue[j]>queue[k]) mY3x (#I
break; fN>o465I6
SortUtil.swap(queue,j,k); j4Cad
k = j; H6*d#!
} C sn"sf
} i3>7R'q>
Zl.}J,0F
} /'}O-h
)fR'1_
} o%!a
w.Ft-RXA W
SortUtil： aC$hg+U$G
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package org.rut.util.algorithm; ueYZM<],
KaHjL&!
import org.rut.util.algorithm.support.BubbleSort; bY;ah;<
import org.rut.util.algorithm.support.HeapSort; oO>mGl36H
import org.rut.util.algorithm.support.ImprovedMergeSort; T.aY{Y
import org.rut.util.algorithm.support.ImprovedQuickSort; 5>JrTO5
import org.rut.util.algorithm.support.InsertSort; dHzo_VV
import org.rut.util.algorithm.support.MergeSort; >t O(S
import org.rut.util.algorithm.support.QuickSort; BfIGw
import org.rut.util.algorithm.support.SelectionSort; -2mm 5E~N
import org.rut.util.algorithm.support.ShellSort; QE$sXP7&u
Ry0n_J:7
/** zrG&p Z
* @author treeroot _Y*]'?g`
* @since 2006-2-2 5+'1 :Sa(i
* @version 1.0 Rg,pC.7;
*/ _w=si?q
public class SortUtil { a4L8MgF&$-
public final static int INSERT = 1; $v+Q~\'
public final static int BUBBLE = 2; N'!a{rF
public final static int SELECTION = 3; F\Ex$:%~
public final static int SHELL = 4; aDTNr/I
public final static int QUICK = 5; 3xh~xE
public final static int IMPROVED_QUICK = 6; +PY LKyS>
public final static int MERGE = 7; &aaXw?/zr
public final static int IMPROVED_MERGE = 8; ](@Tbm8
public final static int HEAP = 9; S=ebht=
q3e%L
public static void sort(int[] data) { !,PG!Gnl
sort(data, IMPROVED_QUICK); s7iguFQ
} 8AVM(d@
private static String[] name={ InMF$pw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +hRAU@RA
}; :}v&TQ
">*PH}b
private static Sort[] impl=new Sort[]{ vz*QzVk1
new InsertSort(), mHUQtGAVQ
new BubbleSort(), Pp6(7j
new SelectionSort(), %<DXM`Y
new ShellSort(), vu;pILN
new QuickSort(), -S OP8G
new ImprovedQuickSort(), P|_>M SO1'
new MergeSort(), !&Vp5]c
new ImprovedMergeSort(), ,[%KSyH
new HeapSort() {xp/1?Mo*
}; vZmM=hW~
U|={LU
public static String toString(int algorithm){ t0d1??G
return name[algorithm-1]; lW1Al>dW<
} Mk7,:S
kcVEE)zb
public static void sort(int[] data, int algorithm) { 0p:FAvvNI
impl[algorithm-1].sort(data); Ua)ARi %
} B)O{+avu
fa;\4#
public static interface Sort { t{| KL<d]
public void sort(int[] data); PW x9CT
} +;tXk
U@!e&QPn
public static void swap(int[] data, int i, int j) { +LCpE$H
int temp = data; yf*^Y74
data = data[j]; hW6og)x
data[j] = temp; &xo,49`!
} ;tP-#Xf
} $+!/=8R)