[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; rw*#ta O
} Z$h39hm?c
int i1=l; &^-quzlZ
int i2=mid+1; vF45tw
for(int cur=l;cur<=r;cur++){ 71GLqn?
if(i1==mid+1) S&BJR!FQ
data[cur]=temp[i2++]; +*OY%;dQ7@
else if(i2>r) 4qw&G
data[cur]=temp[i1++]; z1oikg:?4
else if(temp[i1] data[cur]=temp[i1++]; "WKE%f
else ^%|(dMo4
data[cur]=temp[i2++]; cpV:y
} n1Ag o3NM
} 7QdU|1]
E%L]ifA9!
} ,nMc. G3
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改进后的归并排序: qwka77nNT
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package org.rut.util.algorithm.support; /uSEG<D
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import org.rut.util.algorithm.SortUtil; GnbXS>
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/** w}Q|*!?_
* @author treeroot &HKrmFgX{
* @since 2006-2-2 xe)< )y
* @version 1.0 wzAp`Zs2Dm
*/ 7S<Z&1(
public class ImprovedMergeSort implements SortUtil.Sort { ?3tR(H<
A/NwM1z[o)
private static final int THRESHOLD = 10; "yMr\jt~-
6"Tr$E
/* 64s9Dy@%F
* (non-Javadoc) ~g2ColFhu
* |L{<=NNs:D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mnpb".VU#T
*/ U4*5o~!=S
public void sort(int[] data) { (tGK~!cAv
int[] temp=new int[data.length]; cTRQI3Oa>
mergeSort(data,temp,0,data.length-1); e=nExY
} X~RET[L2
bHcb.;<
private void mergeSort(int[] data, int[] temp, int l, int r) { &,':@OQ
int i, j, k; (bo{vX
int mid = (l + r) / 2; hB:R8Y^?H
if (l == r) Fs:l"5~>1
return; Jrlc%,pZ
if ((mid - l) >= THRESHOLD) zqAK|jbL
mergeSort(data, temp, l, mid); ;2RCgX!'%
else Nzc1)t=
insertSort(data, l, mid - l + 1); Z2B59,I
if ((r - mid) > THRESHOLD) LV=!nF0
mergeSort(data, temp, mid + 1, r); ~AuvB4xe~
else k}-%NkQ 9O
insertSort(data, mid + 1, r - mid); r8C6bFYM
xU1dy*-
for (i = l; i <= mid; i++) { gDnG!i+
temp = data; m^_)aS
} 'w.:I TJf
for (j = 1; j <= r - mid; j++) { avls[Bq
temp[r - j + 1] = data[j + mid]; }vO^%Gd
} Cm}ZeQ
int a = temp[l]; ja2LQe@Q
int b = temp[r]; GpF,=:
for (i = l, j = r, k = l; k <= r; k++) { >fo &H_a
if (a < b) { &K k+RHM
data[k] = temp[i++]; ,K7C2PV6
a = temp; yoV"?W>!
} else { GMOv$Tn-_L
data[k] = temp[j--]; {U=za1Ga
b = temp[j]; uXeBOLC
} j^ZpBNL
} rjU $*+
} yB}y'5
X4i$,$C
/** N|q:wyS|
* @param data vzaxi;S<
* @param l @N.W#<IG
* @param i zE.4e&m%Z?
*/ ?Z!itB~
private void insertSort(int[] data, int start, int len) { R|t.wawCo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5n.4>yOY
} D]b5*_CT
} ^f!d8 V
} cJ:BEe
} -<&"geJA
O\OG~`HBN
堆排序： :[(X!eP
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package org.rut.util.algorithm.support; k` (_~/#
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import org.rut.util.algorithm.SortUtil; /]]\jj#^
1;L!g*!E
/** #=t:xEz
* @author treeroot R|NmkqTK~(
* @since 2006-2-2 bz H5Lc{%
* @version 1.0 2~h)'n7Mw
*/ Q*$x!q
public class HeapSort implements SortUtil.Sort{ TQ@*eoJj
lKIHBi
/* (non-Javadoc) 9 J5Z'd_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f{ S)wE>;
*/ 1t!Mg{&e[x
public void sort(int[] data) { 2T?t[;-
MaxHeap h=new MaxHeap(); u[2R>=
h.init(data); (U/[i.r5Cj
for(int i=0;i h.remove(); !^q<)!9<EO
System.arraycopy(h.queue,1,data,0,data.length); mMT7`r;l
} jy@}$g{
pSq\3Hp]Q
private static class MaxHeap{ `-ENKr]
lu-VBVwR
void init(int[] data){ 4KybN
this.queue=new int[data.length+1]; f<|8NQ2y.
for(int i=0;i queue[++size]=data; #FaR?L![Y
fixUp(size); !;CY @=
} -oF4mi8S
} `j=CzZ*em?
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private int size=0; zCvR/
WlZ[9,:p1
private int[] queue; |7%$+g
Y!&dj95y
public int get() { 7\{<AM?*
return queue[1]; <#|3z8N2
} x6Z$lhZ
%q>gwq A
public void remove() { E? F @
SortUtil.swap(queue,1,size--); +~FH'DsT
fixDown(1); _,Fwt
} F>*w)6 4~
file://fixdown <\zb*e&vr
private void fixDown(int k) { :sT<<LtI-
int j; z eIBB
while ((j = k << 1) <= size) { UQW;!8J#R(
if (j < size %26amp;%26amp; queue[j] j++; >y]YF3?
if (queue[k]>queue[j]) file://不用交换 :X`J1E]Rjd
break; `m'2RNSc+#
SortUtil.swap(queue,j,k); ?Cu#(
k = j; TqbKH08i/
} SKRD{MRsux
} d G:=tf&1R
private void fixUp(int k) { >b*Pd *f
while (k > 1) { |Ca$>]?
int j = k >> 1; {8I93]
if (queue[j]>queue[k]) 2?-}(F;Z
break; ol`]6"Sc
SortUtil.swap(queue,j,k); ^Gs!"Y
k = j; kf5921(P
} PrN?;Z.
} yx/:<^"-$
NmtBn^t
} %8{' XJ!
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} ]Dx?HBM"DC
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SortUtil： cVulJ6
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package org.rut.util.algorithm; /[EI0~P
`VBjH]$
import org.rut.util.algorithm.support.BubbleSort; .WG@"2z|
import org.rut.util.algorithm.support.HeapSort; Hh!x&;x}
import org.rut.util.algorithm.support.ImprovedMergeSort; 3*arW|Xm
import org.rut.util.algorithm.support.ImprovedQuickSort; T,?^J-h^
import org.rut.util.algorithm.support.InsertSort; T 86}^=-5
import org.rut.util.algorithm.support.MergeSort; G0*$&G0nb
import org.rut.util.algorithm.support.QuickSort; ,sLV6DM
import org.rut.util.algorithm.support.SelectionSort; Vl9\&EL
import org.rut.util.algorithm.support.ShellSort; 23+GX&Rp
b|fq63ar;
/** hZzsZQ`
* @author treeroot .2Rh_ful
* @since 2006-2-2 i1G}mYz_
* @version 1.0 (4c<0<"$
*/ UJ6WrO5#kB
public class SortUtil { NWNgh/9?
public final static int INSERT = 1; W BiBtU
public final static int BUBBLE = 2; g?@(+\W
public final static int SELECTION = 3; Z.R^@@RqJ
public final static int SHELL = 4; <,cDEN7
public final static int QUICK = 5; 8@$QN4^u^
public final static int IMPROVED_QUICK = 6; $rjv4e}7
public final static int MERGE = 7; cIgFSwQ4
public final static int IMPROVED_MERGE = 8; jJ?3z,h
public final static int HEAP = 9; LQ{4r1,u]
{ZfTUt)-P
public static void sort(int[] data) { l_}c[bAUu
sort(data, IMPROVED_QUICK); c8}1-MKs_R
} vk#xCggK
private static String[] name={ _wHqfj)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7CQ48LH]
}; jliKMd<?
Pel3e ~?t
private static Sort[] impl=new Sort[]{ %HSoQ?qA
new InsertSort(), aMj3ov8p
new BubbleSort(), &'|bZms g
new SelectionSort(), Bq$bxuhV
new ShellSort(), {=R=\Y?r&
new QuickSort(), t~bjDV^`
new ImprovedQuickSort(), \{~x<<qFd
new MergeSort(), m*I5 \
new ImprovedMergeSort(), a{u)~:/G
new HeapSort() w93yhV?
}; ].1R~7b
^|gN?:fA}
public static String toString(int algorithm){ =CqLZ$10
return name[algorithm-1]; @P@t/
} !A<?nz Uv
g\jdR_/
public static void sort(int[] data, int algorithm) { Crey}A/N
impl[algorithm-1].sort(data); khEHMvVH
} h<uRlTk
]AfeaU'>
public static interface Sort { %Y!lEzB5
public void sort(int[] data); Y*7.3 +#
} Kk/qd)nk
fCF93,?$
public static void swap(int[] data, int i, int j) { b8`O7@ar
int temp = data; AalyEn&>
data = data[j]; pWQ?pTh
data[j] = temp; 5B@&]-'~
} B6ys5eQ
} duwZe+