[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; J;7O`5J
} mGqT_
int i1=l; q/yL={H?
int i2=mid+1; Sf*b{6lcC
for(int cur=l;cur<=r;cur++){ Gd%E337d
if(i1==mid+1) nc.X+dx:
data[cur]=temp[i2++]; *f$wmZ5A
else if(i2>r) WT>2eMK[
data[cur]=temp[i1++]; RgT|^|ZA
else if(temp[i1] data[cur]=temp[i1++]; )]5}d$83
else }W k!):=y
data[cur]=temp[i2++]; uVw|fT
} -?68%[4lm_
} -.X-02
5m&Zq_Qe
} S&YC"
<;Bv6.Z
改进后的归并排序: ,L}
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package org.rut.util.algorithm.support; |\MgE.N
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import org.rut.util.algorithm.SortUtil; vMV}M%~
2bk~6Osp
/** Grw|8xN0t
* @author treeroot 6S#e?>"+
* @since 2006-2-2 `aW>h8$I)
* @version 1.0 ^5sO;vf
*/ v5;V$EGD&
public class ImprovedMergeSort implements SortUtil.Sort { f?A1=lm~
na1*^S`[
private static final int THRESHOLD = 10; 3KW4 ]qo~
gK8{=A0c
/* zn'F9rWx>
* (non-Javadoc) F"<TV&xf
* &{c.JDO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hf~'EdU
*/ GF-\WD
public void sort(int[] data) { o1kY|cnGH
int[] temp=new int[data.length]; 89[5a
mergeSort(data,temp,0,data.length-1); TZk.?@s5
} 6eh\-+=
r#%z1u
private void mergeSort(int[] data, int[] temp, int l, int r) { 'dstAlt?
int i, j, k; x4C}AyR
int mid = (l + r) / 2; RHc-kggk!
if (l == r) ZCAdCKX|
return; d/O~"d
if ((mid - l) >= THRESHOLD) YxUC.2V|7$
mergeSort(data, temp, l, mid); x$;I E
else _Fz]QxO
insertSort(data, l, mid - l + 1); 7xIXFuu
if ((r - mid) > THRESHOLD) +q/ j
mergeSort(data, temp, mid + 1, r); bZ$;`F5})
else dyz)22{\!`
insertSort(data, mid + 1, r - mid); %9!,PeRe
R"9^FQ13
for (i = l; i <= mid; i++) { "Vg1'd}f
temp = data; 3S~Gi,
} {T^"`%[
for (j = 1; j <= r - mid; j++) { YnzhvE
temp[r - j + 1] = data[j + mid]; 1sqBBd"=PY
} j[Y$)HF
int a = temp[l]; kIlc$:K^
int b = temp[r]; axSJ:j8
for (i = l, j = r, k = l; k <= r; k++) { M[^
if (a < b) { ueyz@{On~
data[k] = temp[i++]; +;P8QZK6
a = temp; /Jjub3>Q
} else { ;|.^_Xs
data[k] = temp[j--]; J.r^"K\
b = temp[j]; -r6cK,WVU
} t0 1@h_WS
} ?9Eshw2
} <GbF4\ue
S~9K'\vO
/** 3:Mq40]x
* @param data CHeU?NtFps
* @param l Stkyz:,(
* @param i Ca&5"aki
*/ 0Y_?r$M
private void insertSort(int[] data, int start, int len) { {hzU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (|<e4HfZL
} 0@K?'6
} 'Olp2g8=
} 6 K+DgNK
} =r3%jWH6
O]\6Pv@N
堆排序： E,S[3+
i:6`Rmz1.
package org.rut.util.algorithm.support; s[ ze8:
)AxgKBW
import org.rut.util.algorithm.SortUtil; aL9yNj}2
/A8ua=Kn
/** (aAv7kB&
* @author treeroot {{G`0i2KV
* @since 2006-2-2 B^;P:S<yG
* @version 1.0 G234UjN%
*/ M7O5uW`
public class HeapSort implements SortUtil.Sort{ ^usZ&9"@P
J4yL"iMt
/* (non-Javadoc) ZPktZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6`>WO_<z
*/ o7/S'Haxc]
public void sort(int[] data) { E<j}"W$a
MaxHeap h=new MaxHeap(); p(jY2&g
h.init(data); /k$h2,O"*
for(int i=0;i h.remove(); M.|cl#
System.arraycopy(h.queue,1,data,0,data.length); ,f4VV\
} |Va*=@&6J
U7)#9qS4
private static class MaxHeap{ gn2*'_V~3
,N[N;Uoj
void init(int[] data){ [1-1^JY
this.queue=new int[data.length+1]; -YXNB[C
for(int i=0;i queue[++size]=data; }e7os0;s
fixUp(size); o$*aAgS+
} gx-ib/_f1
} ,g.*Mx`-
'pCZx9*c
private int size=0; k$u\\`i]oC
DChqcdx~~
private int[] queue; {XHAQ9'
PTU_<\
public int get() { V`/E$a1&
return queue[1]; UlG8c~p
} =cwQG&as
qO;.{f
public void remove() { aC\O'KcH
SortUtil.swap(queue,1,size--); y /$Q5P+o
fixDown(1); 'qL:7
} /$Qs1*
file://fixdown {|KFgQ'\
private void fixDown(int k) { E,~|-\b}h
int j; J`E,Xw>2
while ((j = k << 1) <= size) { kLsp0%2
if (j < size %26amp;%26amp; queue[j] j++; <G};`}$a
if (queue[k]>queue[j]) file://不用交换 U$*AV<{%
break; Jy#c 6
SortUtil.swap(queue,j,k); dRdI('
k = j; bW]7$?acv
} HE;}B!>
} iyA=d{S;V
private void fixUp(int k) { ~XzT~WxW
while (k > 1) { L}~"R/iWCT
int j = k >> 1; $?_/`S13
if (queue[j]>queue[k]) rr@h9bak;g
break; %DK0s(*w0
SortUtil.swap(queue,j,k); (yx^zW7
k = j; S!Alno
} q9e(YX>
} &d%\&fCm(
q,i&%
} *^ZJ&.
J!{t/_aw
} eD|p1+76
f`$F^=
SortUtil： ,4Q1[K35B
3WVH8Sb
package org.rut.util.algorithm; TpAE9S
fH@P&SX
import org.rut.util.algorithm.support.BubbleSort; ty"|yA
import org.rut.util.algorithm.support.HeapSort; r}**^"mFy
import org.rut.util.algorithm.support.ImprovedMergeSort; Qe[ejj1o:
import org.rut.util.algorithm.support.ImprovedQuickSort; &RJ*DAmL
import org.rut.util.algorithm.support.InsertSort; B\73Vf
import org.rut.util.algorithm.support.MergeSort; kB)u@`</mV
import org.rut.util.algorithm.support.QuickSort; R@X65o
import org.rut.util.algorithm.support.SelectionSort; V< Ib#rd'
import org.rut.util.algorithm.support.ShellSort; *:5S*E&}V
K2XRKoG
/** z#[PTqD-_
* @author treeroot L@5j? N?F
* @since 2006-2-2 t)4><22of
* @version 1.0 D-/q-=zd
*/ vGCvJ*4!
public class SortUtil { %.h&W;
public final static int INSERT = 1; Dhe*)
public final static int BUBBLE = 2; 4'+g/i1S F
public final static int SELECTION = 3; u?-|sv*
public final static int SHELL = 4; 9-W3}4'e
public final static int QUICK = 5; R_4eME2LB
public final static int IMPROVED_QUICK = 6; O .ESI
public final static int MERGE = 7; %eE0a4^".
public final static int IMPROVED_MERGE = 8; tD~ nPbbB
public final static int HEAP = 9; 2 rFjYx8D!
] 6X;&=H
public static void sort(int[] data) { t/wo G9N
sort(data, IMPROVED_QUICK); qkM)zOZ^
} g@O H,h/
private static String[] name={ E0*KKo%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q4EOI
}; :`>$B?x+
Mp?Gi7o=
private static Sort[] impl=new Sort[]{ :MP*Xy\7&J
new InsertSort(), $} @gR] Z
new BubbleSort(), :R{pV7<O
new SelectionSort(), kR+7JUq]
new ShellSort(), 68?>#o865
new QuickSort(), +SB>>
new ImprovedQuickSort(), :R-_EY$k6
new MergeSort(), %/4_|.8u
new ImprovedMergeSort(), ]vflx^<?
new HeapSort() xZ]QT3U+
}; +n%d,Pz
@DNwzdP
public static String toString(int algorithm){ Y#5v5
return name[algorithm-1]; IAHQT<]
} Hl#?#A5
T,oZaJ<
public static void sort(int[] data, int algorithm) { *mJ\Tzc)
impl[algorithm-1].sort(data); 64L;np>
} f<{f/lU@
2oF1do;
public static interface Sort { Z[9t?ePL
public void sort(int[] data); i'QR-B&Z
} .iC!Ttr
N/!(`Z,
public static void swap(int[] data, int i, int j) { ]$,3vYBf
int temp = data; oF~+L3&X
data = data[j]; :4r{t?ytXw
data[j] = temp; dBkM~"
} '~9w<dSB!r
} <])]1r8