[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; 5RFro^S9E
} X%j`rQk`
int i1=l; \Ta5c31S+
int i2=mid+1; *1{A'`.=\
for(int cur=l;cur<=r;cur++){ ]& ckq
if(i1==mid+1) yxHo0U
data[cur]=temp[i2++]; @#OL{yMy
else if(i2>r) ,;Wm>V)o
data[cur]=temp[i1++]; ^4+NPk
else if(temp[i1] data[cur]=temp[i1++]; GIH{tr1:<
else (${ #l
data[cur]=temp[i2++]; fmj}NV&ma
} k6&~)7 -f
} Zk((VZ(y
;!A8A4~nu
} N%}J:w
]tN)HRk1
改进后的归并排序: `G1"&q,i
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package org.rut.util.algorithm.support; RQ=$, i`
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import org.rut.util.algorithm.SortUtil; 7PMz6
g:ky;-G8b
/** os"R'GYmf
* @author treeroot Ig}hap]G
* @since 2006-2-2 S',h*e
* @version 1.0 BInSS*L
*/ ?D _4KFr
public class ImprovedMergeSort implements SortUtil.Sort { RU7+$Z0K
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private static final int THRESHOLD = 10; M$%ON>Kq
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/* JxtzI2
* (non-Javadoc) j0}wv~\
* @i!+Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Awxm[:r>^
*/ X^N6s"2
public void sort(int[] data) { klnNBo!
int[] temp=new int[data.length]; e}yF2|0FD
mergeSort(data,temp,0,data.length-1); 7;q0'_G
} GqL&hbpi
_Sfu8k>):
private void mergeSort(int[] data, int[] temp, int l, int r) { $I*}AUp v?
int i, j, k; jyW={%&
int mid = (l + r) / 2; Mb2a;s
if (l == r) /)J]ItJlz
return; M?sax+'
if ((mid - l) >= THRESHOLD) kE'p=dXx
mergeSort(data, temp, l, mid); ]vz6DJs
else 1a(\F7
insertSort(data, l, mid - l + 1); &?bsBqpN
if ((r - mid) > THRESHOLD) _]o7iqtv
mergeSort(data, temp, mid + 1, r); N.q~\sF^
else ^g6v#]&WA
insertSort(data, mid + 1, r - mid); PWl;pBo
i=#\`"/
for (i = l; i <= mid; i++) { vc|tp_M67
temp = data; ,dQ*0XO!
} \-]Jm[]^
for (j = 1; j <= r - mid; j++) { I2CI9,0
temp[r - j + 1] = data[j + mid]; ffL]_E
} WuY#Kx~2
int a = temp[l]; qzxWv5UH
int b = temp[r]; J&~I4ko]
for (i = l, j = r, k = l; k <= r; k++) { 4z5qXI/<m4
if (a < b) { e_epuki
data[k] = temp[i++]; D? %*L
a = temp; /r'Fq =z
} else { VdM Ksx`r
data[k] = temp[j--]; jm<^WQ%Cc
b = temp[j]; (Ud"+a
} $!9U\Au>2
} N*Q*>q
} h/\Zq
%IVM1
/** 4K:Aqqhds
* @param data oe^JDb#
* @param l GPh;r7xg6
* @param i #]c_2V
*/ "" ^n^$
private void insertSort(int[] data, int start, int len) { TxQsi"0c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t&43)TPb.
} sYXLVJ>b
} <ndY6n3
} Z<d=v3q
} 9s5s;ntz"
P|ibUxSA~,
堆排序： 8u)>o* :
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package org.rut.util.algorithm.support; qmnl
]]r;}$
import org.rut.util.algorithm.SortUtil; ~P}ng{x4z
<^> nR3E
/** P*;[&Nn4
* @author treeroot KI\bV0$p<
* @since 2006-2-2 b(@GKH"W
* @version 1.0 <nk/w5nKL
*/ DS4y@,/)'
public class HeapSort implements SortUtil.Sort{ v\9f 8|K
e9'0CH<
/* (non-Javadoc) t 4M-;y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B)DuikV.D
*/ :/PxfN5
public void sort(int[] data) { I+Yq",{%
MaxHeap h=new MaxHeap(); fA1{-JzV<4
h.init(data); N6BOUU]
for(int i=0;i h.remove(); M7Xn=jc
System.arraycopy(h.queue,1,data,0,data.length); =`(W^&|
} UT{`'#iT
4yTgH0(T
private static class MaxHeap{ Zr6.Nw
aEa.g.SZ
void init(int[] data){ .P5'\
this.queue=new int[data.length+1]; mIrN~)C4\
for(int i=0;i queue[++size]=data; +:aNgO#e8
fixUp(size); w?*79 u
} wLI1qoDM
} _2<UcC~
/74h+.amg
private int size=0; 3=Uyt
Dwr"-
private int[] queue; 7GErh,
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public int get() { CQ{{J{pU"
return queue[1]; 3U!=R-
} *L Y6hph"
7@k3-?q
public void remove() { g"c7$
SortUtil.swap(queue,1,size--); /Ah'KN|EN
fixDown(1); cc1M9kVi
} udc9KuR@
file://fixdown NMC0y|G
private void fixDown(int k) { \PG_i'R
int j; 'V <ZmJ2
while ((j = k << 1) <= size) { ~Dw% d;
if (j < size %26amp;%26amp; queue[j] j++; xwHE,ykE
if (queue[k]>queue[j]) file://不用交换 Y;E'gP-J
break; *xj2Z,u
SortUtil.swap(queue,j,k); \O,yWyU4
k = j; v:9'k~4)
} 6o(.zk`d
} <*/Z>Z_c2
private void fixUp(int k) { qwn EVjf
while (k > 1) { QvOl-Lfc
int j = k >> 1; $ )2zz>4
if (queue[j]>queue[k]) `fG<iBD
break; +br' 2Pn
SortUtil.swap(queue,j,k); 9JILK9mVO
k = j; ]n:R#55A
} W(-son~I
} Znh;#%n|
#~qzaETv,
} CC$rt2\e
`/i/AZ{
} 3.ShAL
,KPrUM}
SortUtil： gt~u/Z%
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package org.rut.util.algorithm; *UG?I|l|I
~u[1Vz4#3
import org.rut.util.algorithm.support.BubbleSort; VOg'_#I
import org.rut.util.algorithm.support.HeapSort; zx+}>(U\U
import org.rut.util.algorithm.support.ImprovedMergeSort; #P!M"_z
import org.rut.util.algorithm.support.ImprovedQuickSort; /,$V/q+
import org.rut.util.algorithm.support.InsertSort; )}_}D+2
import org.rut.util.algorithm.support.MergeSort; :RBeq,QaO
import org.rut.util.algorithm.support.QuickSort; #%#N.tB5
import org.rut.util.algorithm.support.SelectionSort; sP=^5K`g
import org.rut.util.algorithm.support.ShellSort; |;p.!FO
3e\IRF xzb
/** A ;|P\V
* @author treeroot OekE]`~w
* @since 2006-2-2 @2_E9{T
* @version 1.0 <KoOJMx(
*/ 45jImCm
public class SortUtil { _?I*:: I
public final static int INSERT = 1; #2Iw%H2q&
public final static int BUBBLE = 2; #60gjHYaV
public final static int SELECTION = 3; hx:^xW@r4P
public final static int SHELL = 4; hC]:+.Q+
public final static int QUICK = 5; }"kF<gG1
public final static int IMPROVED_QUICK = 6; )%8st'
public final static int MERGE = 7; L EFLKC
public final static int IMPROVED_MERGE = 8; >S{8sN
public final static int HEAP = 9; t/3qD7L
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public static void sort(int[] data) { P{StF`>Y
sort(data, IMPROVED_QUICK); 'S&Zq:
} ={o)82LV
private static String[] name={ zzd PR}VG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" um( xZ6&m
}; GsiKL4|mj
t2m7Yh5B
private static Sort[] impl=new Sort[]{ qc';<
new InsertSort(), VAqZ`y
new BubbleSort(), zpzxCzU
new SelectionSort(), )YwLj&e4tf
new ShellSort(), Ya!PV&"Z
new QuickSort(), g{K \
new ImprovedQuickSort(), g{kjd2
new MergeSort(), yOk{l$+
new ImprovedMergeSort(), Gj[5ew?@
new HeapSort() WB `h)
}; PO:sF]5
M.EL^;r
public static String toString(int algorithm){ 6k{gI.SG
return name[algorithm-1]; f=8{cK0j
} ~I~lb/
(iJ /
public static void sort(int[] data, int algorithm) { m5,&;~
impl[algorithm-1].sort(data); +NeoGnj
} ;sx4w!Y,
tOo\s&j
public static interface Sort { R+.kwq3CED
public void sort(int[] data); ]c6h'}
} ~b4kV)[ q
!lM.1gTTC
public static void swap(int[] data, int i, int j) { ,&Vir)S
int temp = data; 8~|v:qk
data = data[j]; 'rVB2 `z-
data[j] = temp; -av=5hm
} 1hc`s+N
} Fw#1?/K~