[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; C+mU_g>
} f0F$*"#G
int i1=l; F, "x~C
int i2=mid+1; DjKjEZHgM
for(int cur=l;cur<=r;cur++){ Z*)<E)
if(i1==mid+1) y\[=#g1(@
data[cur]=temp[i2++]; 7PMZt$n
else if(i2>r) y{N9.H2
data[cur]=temp[i1++]; p%s D>1k
else if(temp[i1] data[cur]=temp[i1++]; JjmL6(*ui
else ymzm x$o=
data[cur]=temp[i2++]; S;NXOsSu
} ![ QQF|
} =bDG|:+
"OPUGwf
} =~h54/#[I
s*IfXv
改进后的归并排序: 6~}H3rvO}
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package org.rut.util.algorithm.support; |h7v}Y
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import org.rut.util.algorithm.SortUtil; W)#`4a^xj7
5c"kLq6r
/** E;qwoTmul
* @author treeroot 1bBK1Uw
* @since 2006-2-2 JvDsr0]\#
* @version 1.0 WdT|xf.Q&
*/ _(hwU>.
public class ImprovedMergeSort implements SortUtil.Sort { vf2K2\fn
|(SW
private static final int THRESHOLD = 10; 7'|PHQ?S
(Y>MsqwWfC
/* xR:h^S^W ~
* (non-Javadoc) ueR42J%s
* .bE,Q9:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?@1'WD t
*/ p[b\x_0%c
public void sort(int[] data) { ZYA(Bg^
int[] temp=new int[data.length]; +RkYW*|$S
mergeSort(data,temp,0,data.length-1); @>Keu\)
} BGX@n#:
ng*%1;P
private void mergeSort(int[] data, int[] temp, int l, int r) { =r~.I
int i, j, k; z m'jk D|
int mid = (l + r) / 2; ! Cl/=0$[L
if (l == r) +2SX4Kxu
return; Iqsk\2W]a3
if ((mid - l) >= THRESHOLD) qC)VT3
mergeSort(data, temp, l, mid); .N=hA
else qj&)w9RLJE
insertSort(data, l, mid - l + 1); jO55<s94
if ((r - mid) > THRESHOLD) HhvG#Sam!
mergeSort(data, temp, mid + 1, r); {<kG{i/
else Z=0W@_s
insertSort(data, mid + 1, r - mid); =FmU]DV
x/=j$oA
for (i = l; i <= mid; i++) { j;)6uia*A
temp = data; qedGBl&
} MbfzGYA2~
for (j = 1; j <= r - mid; j++) { Y9;Mey*oW
temp[r - j + 1] = data[j + mid]; ?_aR-[XRg
} spJ(1F{|V
int a = temp[l]; 4*x!B![]y
int b = temp[r]; PAHlj,n)
for (i = l, j = r, k = l; k <= r; k++) { 0Mg8{
if (a < b) { ^>Y%L(>
data[k] = temp[i++]; &r%*_pX
a = temp; ^{:jY, ?]
} else { iIE(zw)H
data[k] = temp[j--]; <^U(ya
b = temp[j]; %7msAvbk
} (GG"'bYk
} 2~V Im#
} ZRB 0OH
Yys~p2
/** t\i1VXtO
* @param data m]\zt
* @param l SbZt\a 8
* @param i u4@e=vWI
*/ iwQ-(GjM[A
private void insertSort(int[] data, int start, int len) { "Vq]|j,B/c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4Umsc>yfK
} aLi_Hrb9
} +5[oY,^cO
} -kbm$~P
} }4SSo)Uv/
Y/H^*1
堆排序： xXZKj
pFTlhj)1
package org.rut.util.algorithm.support; s&hA
S |>$0P4W(
import org.rut.util.algorithm.SortUtil; 7E`(8i
5L}>+js2
/** 5lnSa+_/f
* @author treeroot ulf/C%t,R
* @since 2006-2-2 <zuE=0P~%
* @version 1.0 Wk\@n+Q{]
*/ ^Pd37&B4V
public class HeapSort implements SortUtil.Sort{ T[-c|
]M;6o@hq
/* (non-Javadoc) W@,p9=425
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KC:4
*/ YX`=M
public void sort(int[] data) { T:dm0iau
MaxHeap h=new MaxHeap(); _AYC|R|
h.init(data); EWIc|b:
for(int i=0;i h.remove(); 3]<re{)J9O
System.arraycopy(h.queue,1,data,0,data.length); ~9r!m5ws
} QaWHz
$-Pqs ^g
private static class MaxHeap{ >}b6J7_
IzdTXc f
void init(int[] data){ tRnW%F5
this.queue=new int[data.length+1]; 1/ pA/UVO
for(int i=0;i queue[++size]=data; _]xt65TL
fixUp(size); RR!!hY3 K
} ]<T8ZA_Y;
} +'/}[1q1/T
(\t_Hs::a
private int size=0; 12sD|j
@GQ8q]N:<
private int[] queue; VtO;UN
dAr)%RZ
public int get() { g'ZMV6b?K
return queue[1]; 7sc<dM
} 8ts+'65|F
vA"niO
public void remove() { Y^2Qxo3"3
SortUtil.swap(queue,1,size--); RO{@RhnV
fixDown(1); iv:/g|MBI&
} /J.\p/%\
file://fixdown B>Cs&}Y!
private void fixDown(int k) { xs'kO=
int j; O R<"LTCL
while ((j = k << 1) <= size) { 4su_;+]
if (j < size %26amp;%26amp; queue[j] j++; s`=/fvf.
if (queue[k]>queue[j]) file://不用交换 Bw<zc=%
break; x}&a{;
SortUtil.swap(queue,j,k); ]hE+$sKd
k = j; .S!>9X,
} 5m^Hi}S_
} 4b2mtLn_
private void fixUp(int k) { Mf:M3H%YV+
while (k > 1) { N3gNOq&
int j = k >> 1; 0UGiPH,()
if (queue[j]>queue[k]) d"I28PIS"
break; 'DzBp
SortUtil.swap(queue,j,k); 8.CKH4h
k = j; +K;Y+ K&;2
} X#DL/#z k
} ')5L_$
J4G> E.8
} px_s@>l`
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} r|^lt7\
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SortUtil： >H}jR[H'
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package org.rut.util.algorithm; SgpZ;\_
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import org.rut.util.algorithm.support.BubbleSort; (@ fa~?v>@
import org.rut.util.algorithm.support.HeapSort; @1v3-n=
import org.rut.util.algorithm.support.ImprovedMergeSort; b+IOh|
import org.rut.util.algorithm.support.ImprovedQuickSort; 3zB|!pC6s
import org.rut.util.algorithm.support.InsertSort; 7k[pvd|L
import org.rut.util.algorithm.support.MergeSort; 9$o<
import org.rut.util.algorithm.support.QuickSort; EK?@Z.q+
import org.rut.util.algorithm.support.SelectionSort; G;C8Kde
import org.rut.util.algorithm.support.ShellSort; {jOzap|
}A1|jY)x
/** *#lBQBH|.
* @author treeroot @%OPy|=,{
* @since 2006-2-2 & =73D1A
* @version 1.0 X<~k =qwA
*/ 7-".!M
public class SortUtil { &_9YLXtMi;
public final static int INSERT = 1; 'u(=eJ@1
public final static int BUBBLE = 2; [J)/Et
public final static int SELECTION = 3; 7`IUMYl#~
public final static int SHELL = 4; cgs3qI
public final static int QUICK = 5; ZT) !8
public final static int IMPROVED_QUICK = 6; Cf0|Z
public final static int MERGE = 7; *$i;o3
public final static int IMPROVED_MERGE = 8; HKTeqH_:
public final static int HEAP = 9; [x!i* rW3
(;0$i?3\
public static void sort(int[] data) { .4Qb5I2#
sort(data, IMPROVED_QUICK); )o#6-K+b
} /a[V!<"R
private static String[] name={ y]}b?R~p=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }_{y|NW
}; 5/B#)gm
D:wnO|:
private static Sort[] impl=new Sort[]{ .P)s4rQ\
new InsertSort(), , Aq9fyC%
new BubbleSort(), ^IX%dzM
new SelectionSort(), _1>SG2h{fV
new ShellSort(), C-llq`(d
new QuickSort(), 7hB#x]oQo
new ImprovedQuickSort(), 59{;VY81
new MergeSort(), >u=%Lz"J
new ImprovedMergeSort(), h6u2j p(+
new HeapSort() q&zny2])
}; ;asm 0H(
MV:W@)rg
public static String toString(int algorithm){ w4\BD&7V
return name[algorithm-1]; P<%v+O
} -xJX_6}A
iv:,fkwG
public static void sort(int[] data, int algorithm) { {(rf/:X!p
impl[algorithm-1].sort(data); X*pZNz&E
} QVIcb;&:}
In f9wq\
public static interface Sort { 9s! 2 wwh
public void sort(int[] data); /~40rXH2C
} Hm>-LOCcl
m6b$Xyq[
public static void swap(int[] data, int i, int j) { m</]D WJ
int temp = data; }>2t&+v+
data = data[j]; gaQ[3g
data[j] = temp; Hx$.9'Oq\Q
} 0 _Q*E3
} JXH",""bq