[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; 14*6+~38m&
} M}q;\}
int i1=l; @.`k2lxGd~
int i2=mid+1; OXn-!J90P
for(int cur=l;cur<=r;cur++){ wSPmiJ/!
if(i1==mid+1) .tQ(q=#
data[cur]=temp[i2++]; <FI*A+I4\
else if(i2>r) @]p{%"$
data[cur]=temp[i1++]; ]Tg@wMgI
else if(temp[i1] data[cur]=temp[i1++]; *xY3F8
else T8Q_JQ
data[cur]=temp[i2++]; _x^rHADp
} gQJLqs"F
} E&5S[n9{3
#z7yoP
} PsD)]V9%:
w.#z>4#3-
改进后的归并排序: TQ0ZBhd
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package org.rut.util.algorithm.support; q8FpJ\
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import org.rut.util.algorithm.SortUtil; c;06>1=wP5
xq=!1>
/** 0Ub'=`]5a
* @author treeroot S\Le;,5Z
* @since 2006-2-2 =1'WZp}D5
* @version 1.0 .D\oKhV(
*/ yPs6_Qo!p
public class ImprovedMergeSort implements SortUtil.Sort { ?mSZQF:d@
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private static final int THRESHOLD = 10; {9.UeVz
" Up(Vj@
/* aw~h03R_Z
* (non-Javadoc) + #E?)
* Ei\>gXTH1-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @^ *62
*/ <W)F{N?
public void sort(int[] data) { |5X59! JL
int[] temp=new int[data.length]; %e3E}m>
mergeSort(data,temp,0,data.length-1); %lGOExV%
} !H{>c@i
DT)][V^w
private void mergeSort(int[] data, int[] temp, int l, int r) { NGkxg:
int i, j, k; pV;0Hcy
int mid = (l + r) / 2; Cc,V ]
if (l == r) qswC>Gi
return; 3}&3{kt
if ((mid - l) >= THRESHOLD) ,4 _H{+M
mergeSort(data, temp, l, mid); yFQaNuZPC
else (2M00J-o
insertSort(data, l, mid - l + 1); v+`'%E
if ((r - mid) > THRESHOLD) )pT5"{
mergeSort(data, temp, mid + 1, r); "#-iD
else aR('u:@jHi
insertSort(data, mid + 1, r - mid); s/s&d pT*
8"g+ k`PRy
for (i = l; i <= mid; i++) { b6sf1E
temp = data; _~ei1 G.R
} R8eBIJ/@_
for (j = 1; j <= r - mid; j++) { jw{B8<@s
temp[r - j + 1] = data[j + mid]; ^blw\;LB
} SE@TY32T
int a = temp[l]; 9p3~WA/M@
int b = temp[r]; Kg"eS`-
for (i = l, j = r, k = l; k <= r; k++) { %N&W_.F6
if (a < b) { u a_w5o7
data[k] = temp[i++]; % XZ&(
a = temp; 9+s&|XS*
} else { hfyU}`]
data[k] = temp[j--]; GiEt;8
b = temp[j]; X;GU#8W
} US"g>WLwJ
} QT^b-~^
} ~9vK6;0
Zl3e=sg=
/** q oi21mCn
* @param data yt5<J-m
* @param l Lw_|o[I}
* @param i X#JUorGp
*/ {"{]S12N
private void insertSort(int[] data, int start, int len) { SlR//h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "G.X=, V
} n5.sx|bI?
} sCrP+K0D
} ;R#RdUFH
} U0:*?uA.
j=M%*`@
堆排序： 5 m-/N?c
6Q]c}
package org.rut.util.algorithm.support; ; YQB
M."/"hV`-
import org.rut.util.algorithm.SortUtil; 4* >j:1
w(S~}'Sg*P
/** `NgQ>KV!
* @author treeroot 2z;3NUL$n
* @since 2006-2-2 {2P18&=
* @version 1.0 Y)5O %@Rl
*/ [w@S/K[_|
public class HeapSort implements SortUtil.Sort{ |/n7(!7$[v
L@6]~[JvP
/* (non-Javadoc) Q. O4R_H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hB.8\-}QMq
*/ !'F1Ht
public void sort(int[] data) { m+s*Io{Ip
MaxHeap h=new MaxHeap(); ?yq=c
h.init(data); xp95KxHHo
for(int i=0;i h.remove(); }kvix{
System.arraycopy(h.queue,1,data,0,data.length); ,;w~ VZ4
} r/ g{j
# M/n\em"X
private static class MaxHeap{ PN]hG,q*4O
Q> y!
void init(int[] data){ a_5s'Dh
this.queue=new int[data.length+1]; q 9xA.*
for(int i=0;i queue[++size]=data; ly*v|(S&
fixUp(size); #vyf*jPr
} [ R+M .5
} } (-9d
%?gG-R
private int size=0; AJ*17w
bs~P
private int[] queue; 7JQ4*RM
~<VxtcEBz
public int get() { FD 8Lk
return queue[1]; v(.mM9>
} U; m@
,>6a)2xh
public void remove() { \z!lw
SortUtil.swap(queue,1,size--); ~s HdOMw
fixDown(1); @hg[v`~
} -kLBq:M
file://fixdown :K2 X~Ty
private void fixDown(int k) { 95@u|#n
int j; v {HF}L
while ((j = k << 1) <= size) { U3:|!CC)T
if (j < size %26amp;%26amp; queue[j] j++; ,%IP27bPW
if (queue[k]>queue[j]) file://不用交换 # f-hI
break; qF bj~ec
SortUtil.swap(queue,j,k); v\?J=|S+
k = j; ms}o[Z@n
} Fn`Zw:vp6
} "M iJM+,
private void fixUp(int k) { =h-EN_[
while (k > 1) { unn2I|XH
int j = k >> 1; T>nH=
if (queue[j]>queue[k]) _dk[k@5W{'
break; >^g2Tg:
SortUtil.swap(queue,j,k); Y3[KS;_fr9
k = j; zx\-He
} 18F}3t??
} RA<ky*^dr
PV~D;
} y-.{){uaD
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} U'" #jT
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SortUtil： #b428-
y$-@|M$GG
package org.rut.util.algorithm; eJ45:]_%I@
71[?AmxV
import org.rut.util.algorithm.support.BubbleSort; JGvhw,g
import org.rut.util.algorithm.support.HeapSort; W3UxFs]$
import org.rut.util.algorithm.support.ImprovedMergeSort; iLBORT!;
import org.rut.util.algorithm.support.ImprovedQuickSort; *l =f=
import org.rut.util.algorithm.support.InsertSort; |X>'W"Mn
import org.rut.util.algorithm.support.MergeSort; dcmf~+T
import org.rut.util.algorithm.support.QuickSort; %b*N.v1+
import org.rut.util.algorithm.support.SelectionSort; n^{h@u
import org.rut.util.algorithm.support.ShellSort; d*Mqs}8
ELnUpmv\
/** Yn [ F:Z
* @author treeroot Ow>u!P!
* @since 2006-2-2 *Lz'<=DLoW
* @version 1.0 b3>zdS]Q
*/ -V4{tIQY
public class SortUtil { \`~YW<D
public final static int INSERT = 1; |z3!3?%R
public final static int BUBBLE = 2; e{87n>+,
public final static int SELECTION = 3; E@k'uyIu
public final static int SHELL = 4; lFtEQ '}
public final static int QUICK = 5; 5%9Uh'y#
public final static int IMPROVED_QUICK = 6; o[KZm17
public final static int MERGE = 7; K!9K^h
public final static int IMPROVED_MERGE = 8; zOSUYn
public final static int HEAP = 9; <S7SH-{_\
C@q#s
public static void sort(int[] data) { lbt8S.fx
sort(data, IMPROVED_QUICK); `qmwAT
} Ag\RLJ.KD
private static String[] name={ oh$"?N7n1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iT{4-j7|P4
}; 3YLfh`6
,sc#l<v
private static Sort[] impl=new Sort[]{ x*F-d2D
new InsertSort(), ,_(=w.F
new BubbleSort(), \,/ozfJ7dT
new SelectionSort(), S)zw[m
new ShellSort(), +pT;; 9
new QuickSort(), JXkx!X_{
new ImprovedQuickSort(), vjGJRk|XED
new MergeSort(), =/a`X[9vI
new ImprovedMergeSort(), w{T$3F`@9
new HeapSort() "2C}Pr,p8
}; [g@qZ5I.
N e{=KdzT
public static String toString(int algorithm){ .{ILeG
return name[algorithm-1]; t*Ro2QZ
} f2gh|p`
rz|Sjtq
public static void sort(int[] data, int algorithm) { vgtAJp+p*
impl[algorithm-1].sort(data); ;sYDs71y
} P]^8Enp
B0yGr\KJ
public static interface Sort { GjW(&p$&
public void sort(int[] data); <`Fl Igo
} <HJLs+C
q7aqbkwz}
public static void swap(int[] data, int i, int j) { WLU_t65
int temp = data; UGM:'xa<T
data = data[j]; 9=iMP~?xF
data[j] = temp; d!<>Fh^6,
} S9l po_!z
} {}'Jr1