[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; %cDTy]ILu
} ;'o:1{Y
int i1=l; R!v ?d2
int i2=mid+1; -&#H@Gyw
for(int cur=l;cur<=r;cur++){ s}~'o!}W
if(i1==mid+1) bS0z\!1
data[cur]=temp[i2++]; l_G&#sQ0
else if(i2>r) Wcgy:4K3
data[cur]=temp[i1++]; hBSci|*f
else if(temp[i1] data[cur]=temp[i1++]; Lv;R8^n
else K1P3 FfG
data[cur]=temp[i2++]; uW.)(l
} nDR)UR
} 9w-V +Nf
a;Nj'M~U
} S?Y,sl+A:
~%6GF57gC
改进后的归并排序: OVsZUmSG
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package org.rut.util.algorithm.support; [*-DtbEk
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import org.rut.util.algorithm.SortUtil; \#bk$R@
;rSpM
/** [qHLo>HaL
* @author treeroot #&Zb8HAj
* @since 2006-2-2 Y)x(+#
* @version 1.0 6J|Ee1Ez
*/ erG;M!9\
public class ImprovedMergeSort implements SortUtil.Sort { G/F0)M
P'prp=JD
private static final int THRESHOLD = 10; {r9fKA
yDt3)fP#
/* FW)G5^Tf
* (non-Javadoc) 49o5"M(
* I_Q*uH.Y5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ToUeXU [
*/ `Gl@?9,i
public void sort(int[] data) { RH,1U3?
int[] temp=new int[data.length]; P1f?'i?J
mergeSort(data,temp,0,data.length-1); ")l_>y?
} 0Ey*ci^ue
KrQ8//Ih
private void mergeSort(int[] data, int[] temp, int l, int r) { Rt$Q*`u
int i, j, k; E%CJM+r!
int mid = (l + r) / 2; rYnjQr2a
if (l == r) e1e2Wk
return; wv 7jES
if ((mid - l) >= THRESHOLD) 3>[_2}l
mergeSort(data, temp, l, mid); Z4\$h1tl
else v{ F/Bifo
insertSort(data, l, mid - l + 1); *"N756Cj
if ((r - mid) > THRESHOLD) )V!dmVQq{g
mergeSort(data, temp, mid + 1, r); +LwE=unS
else :y)'_p *l/
insertSort(data, mid + 1, r - mid); <y+8\m
S[o_$@|
for (i = l; i <= mid; i++) { q?x.P2
temp = data; *QzoBpO<
} I'URPj:t
for (j = 1; j <= r - mid; j++) { -[kbHrl&
temp[r - j + 1] = data[j + mid]; zOR
} <r*A(}Y
int a = temp[l]; 33O@jbs@
int b = temp[r]; [.}-nAN
for (i = l, j = r, k = l; k <= r; k++) { l<7)uO^8
if (a < b) { tUXq!r<'dT
data[k] = temp[i++]; 3|/<Pk
a = temp; 'F'v/G~F
} else { 6?U2Et
data[k] = temp[j--]; sR`WV6!9
b = temp[j]; Qh)QdW4
} .bh>_ W_h
} :tu_@3bg-
} W s!N%%g
%J06]FG7
/** a7#J af
* @param data ?)9mHo^
* @param l tA+ c
* @param i mZVYgJQ[
*/ }.<%46_Z-
private void insertSort(int[] data, int start, int len) { ]KMOLe6(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hSmu"a,S
} D.2HM
} 'kW'e
} z5CZ!"&v
} JFx=X=C
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堆排序： (,<ti):
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package org.rut.util.algorithm.support; Gc) Zu`67
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import org.rut.util.algorithm.SortUtil; W{\){fr6O
uy~KJn?Tu
/** [@@Ovv
* @author treeroot *yGOmi
* @since 2006-2-2 Cc:m~e6r
* @version 1.0 n237%LH[
*/ CErkmod{}e
public class HeapSort implements SortUtil.Sort{ f!}c0nb
pQaP9Y{OK
/* (non-Javadoc) i)V-q9\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PgZ~of&
*/ ZFy>Z:&S,
public void sort(int[] data) { 6g@@V=mf
MaxHeap h=new MaxHeap(); dA<PQKm
h.init(data); {q2H_H
for(int i=0;i h.remove(); s1XW}Dw
System.arraycopy(h.queue,1,data,0,data.length); ;b:Ct<
} wVD-}n1"
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private static class MaxHeap{ h5Y3 v
2U6j?MyH2
void init(int[] data){ 'z\K0
this.queue=new int[data.length+1]; y: @[QhV
for(int i=0;i queue[++size]=data; vVF#]t b|
fixUp(size); 4*9y4"
} rm*Jo|eH`
} G0Wzx)3]
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private int size=0; Fkas*79
$smzP.V
private int[] queue; I(E1ym
2 @g'3M
public int get() { C !81Km5
return queue[1]; SGMLs'D
} jcF/5u5e
wU.K+4-k
public void remove() { 4NxtU/5-sU
SortUtil.swap(queue,1,size--); vkan+~H
fixDown(1); fSdv%$;Hc
} b'fj
file://fixdown Y418k
private void fixDown(int k) { e[}R1/!L
int j; ,R$n I*mf_
while ((j = k << 1) <= size) { F|X-|Co
if (j < size %26amp;%26amp; queue[j] j++; }5^j08
if (queue[k]>queue[j]) file://不用交换 j'i-XIs
break; z#b31;A@$
SortUtil.swap(queue,j,k); Gnmj-'x
k = j; 6C>x,kU
} 9="i'nYp
} a3]'%kKp
private void fixUp(int k) { :Vq gmn
while (k > 1) { M:h~;+s
int j = k >> 1; ]*-9zo0
if (queue[j]>queue[k]) -\yaP8V
break; v`B7[B4K3
SortUtil.swap(queue,j,k); b9HE #*d,
k = j; Owalt4}C
} aX6.XHWbDf
} 4f~hd-z
Zk2-U"0\o
} MId\dFu
u2'xM0nQ
} o Wg5-pMWZ
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SortUtil： BvpGP
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package org.rut.util.algorithm; e-f_#!bW
elXY*nt8h
import org.rut.util.algorithm.support.BubbleSort; 0mL#8\'"
import org.rut.util.algorithm.support.HeapSort; E]6C1C&K
import org.rut.util.algorithm.support.ImprovedMergeSort; \}t(g}7T
import org.rut.util.algorithm.support.ImprovedQuickSort; `bO+3Y'5
import org.rut.util.algorithm.support.InsertSort; JI5?, )-St
import org.rut.util.algorithm.support.MergeSort; ^lB'7#7
import org.rut.util.algorithm.support.QuickSort; XXacWdh \
import org.rut.util.algorithm.support.SelectionSort; #X7fs5$&
import org.rut.util.algorithm.support.ShellSort; $Y][-8{t
p_=^E*J]
/** xtN%v0ZZ
* @author treeroot iNf+ -C3
* @since 2006-2-2 J=W"FEXTL7
* @version 1.0 Mi.xay%
*/ &| el8;D
public class SortUtil { [-_u{j
public final static int INSERT = 1; oUR'gc :
public final static int BUBBLE = 2; (Ac '}O
public final static int SELECTION = 3; Z2`(UbG}
public final static int SHELL = 4; o <8L,u(U
public final static int QUICK = 5; $zq`hI!1
public final static int IMPROVED_QUICK = 6; 9)s=%dL
public final static int MERGE = 7; MsCY5g
public final static int IMPROVED_MERGE = 8; 31k.{dnm
public final static int HEAP = 9; C/ow{MxA
9f;\fe
public static void sort(int[] data) { ~:Dr]kt
sort(data, IMPROVED_QUICK); <oTIzj7f
} `TKe+oS)
private static String[] name={ =dUeQ?>t=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ix !O&_6s
}; i;`rzsRb
em<(wJ-Y
private static Sort[] impl=new Sort[]{ ^.Vq0Qzy]
new InsertSort(), z+&mMP`-
new BubbleSort(), lM"@vNgK
new SelectionSort(), !HM{imT
new ShellSort(), py9(z`}
new QuickSort(), rC}r99Pe:x
new ImprovedQuickSort(), YmFJlMK
new MergeSort(), }'a}s0h
new ImprovedMergeSort(), Gr&5 mniu
new HeapSort() v! uD]}
}; 3,e^;{w
cD Z]r@AQ
public static String toString(int algorithm){ 0Z8K+,'!
return name[algorithm-1]; WMZ&LlB%
} BdB/`X*
zn&NLsA
public static void sort(int[] data, int algorithm) { qYZX, x
impl[algorithm-1].sort(data); BftW<1,U^
} 0Jz'9
Jj_E/c"
public static interface Sort { i,M<}e1
public void sort(int[] data); !.H< dQS
} $0V<wsVM
O8TAc]B
public static void swap(int[] data, int i, int j) { =K~<& l8
int temp = data; BZ<Q.:)
data = data[j]; 4]u53`
data[j] = temp; NMM0'tY~
} rq Dre`m
} DG}t!