[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; rhHX0+
} q --NLm@;
int i1=l; 2.Th29]
int i2=mid+1; wVP{R3
for(int cur=l;cur<=r;cur++){ P`cEu6:
if(i1==mid+1) t8E'd:pE
data[cur]=temp[i2++]; `.>2h}op
else if(i2>r) yf2U-s
data[cur]=temp[i1++]; M)!8`]
else if(temp[i1] data[cur]=temp[i1++]; =YE"6iU
else cRDjpc]
data[cur]=temp[i2++]; p&_Kb\}U
} S%R:GZEf_
} VSc;}LH
"=MRzSke3
} My&h{Qk
Z; r}Gm
改进后的归并排序: xoA\^AA
kQRNVdiz
package org.rut.util.algorithm.support; m%X~EwFc.
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import org.rut.util.algorithm.SortUtil; /Uz2.Ua=
O|O#T.Tg
/** 8Tyf#`'I
* @author treeroot @=E@ *@g
* @since 2006-2-2 s,\!@[N
* @version 1.0 dUk^DI,:l
*/ aqK<}jy
public class ImprovedMergeSort implements SortUtil.Sort { =.#*MYB.l
lGwX.cA!'
private static final int THRESHOLD = 10; jt@k<#h~
J'sVT{@GS
/* .\7R/cP}{A
* (non-Javadoc) _1VtVfiZ{
* D[x0sly
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JVD#wwic
*/ n"Ot'1yr
public void sort(int[] data) { P#Z$+&)b)s
int[] temp=new int[data.length]; 22a$//}E
mergeSort(data,temp,0,data.length-1); JM0'V0z
} ZXsm9
l}&egq DC
private void mergeSort(int[] data, int[] temp, int l, int r) { M~t S *
int i, j, k; N1jj\.nB
int mid = (l + r) / 2; 3+;]dqZ
if (l == r) 79AOvh
return; w&8gA[y*u
if ((mid - l) >= THRESHOLD) cfyN)#9
mergeSort(data, temp, l, mid); P ^R224R
else {e/Qs|a R
insertSort(data, l, mid - l + 1); {0WLY@7 2?
if ((r - mid) > THRESHOLD) 8p }E
mergeSort(data, temp, mid + 1, r); X!2/cgU7
else U{gJn#e/.
insertSort(data, mid + 1, r - mid); w8:~LX.n
R;,+0r^i
for (i = l; i <= mid; i++) { &Y;z[+(P
temp = data; ;]3Tuq
} 6 :K~w<mMJ
for (j = 1; j <= r - mid; j++) { 'KMyaEh.u
temp[r - j + 1] = data[j + mid]; ):E4qlB
} u* G|TF
int a = temp[l]; u~=>$oT't
int b = temp[r]; )s4#)E1
for (i = l, j = r, k = l; k <= r; k++) { d\WnuQR[
if (a < b) { xV @X%E
data[k] = temp[i++]; $/ew'h9q
a = temp; +]*4!4MK6
} else { BX;Z t9"*
data[k] = temp[j--]; J~9l+?
b = temp[j]; c~[L;_
} Jb Hn/$
} J'`,];su
} !>W _3Ea
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/** 'z0@|a
* @param data y)X1!3~(
* @param l D|} y{~
* @param i O+A/thI%*S
*/ .e%PK[o
private void insertSort(int[] data, int start, int len) { hVo]fD|W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T},Nqt<
} ~]a:9Ev*
} ,d'x]&a
} fmILkXKz
} ^5x\cR
H]K(`)y}4
堆排序： `6koQZm
Z%Q[W}iD
package org.rut.util.algorithm.support; ZNNgi@6>
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import org.rut.util.algorithm.SortUtil; uA dgR
QL%&b\K
/** #G%[4.$n.
* @author treeroot }"BXqh"\`
* @since 2006-2-2 nm2bBX,fh
* @version 1.0 9#L0Q%,*
*/ 7KXc9:p+
public class HeapSort implements SortUtil.Sort{ a[bu{Z]%
*U|K~dl]K
/* (non-Javadoc) ^cB83%<Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GZ( W64
*/ |{]W (/
public void sort(int[] data) { A J<Sa=
MaxHeap h=new MaxHeap(); B%QvFxZz
h.init(data); wGD*25M7$
for(int i=0;i h.remove(); >J,Rx!fq3
System.arraycopy(h.queue,1,data,0,data.length); RuSKJ,T:9
} MgkeD
?_*X\En*3
private static class MaxHeap{ w'E&w)Z]
<XG&f
void init(int[] data){ Lq<#
this.queue=new int[data.length+1]; CmKbpN*
for(int i=0;i queue[++size]=data; LldZ"%P
fixUp(size); yXyL,R
} f*U3s N^y
} _dCdyf
1'ts>6b
private int size=0; Hz39v44
OOJg%y*H
private int[] queue; y}Ji( q~
8>Az<EF^=#
public int get() { "@uKe8r|y
return queue[1]; foO/Yc
} c&4EO|
}EM vEA
public void remove() { *9Eep~ 6
SortUtil.swap(queue,1,size--); wj$l 093
fixDown(1); ,`kag~bZ
} !0i6:2nw
file://fixdown W>$2BsO
private void fixDown(int k) { 5DB4vh
int j; mN+ w,
while ((j = k << 1) <= size) { Y~vyCU5nWR
if (j < size %26amp;%26amp; queue[j] j++; Mkc
if (queue[k]>queue[j]) file://不用交换 n$]78\C
break; ;\1/4;m
SortUtil.swap(queue,j,k); /Wos{}Z0
k = j; 3azyqpwU$
} NPc@;g]d"
} 0m8mHJ<&
private void fixUp(int k) { cP8g.+
while (k > 1) { }XHB7,
int j = k >> 1; R#QOG}
if (queue[j]>queue[k]) s}3g+T\l1w
break; vZhC_G+tGd
SortUtil.swap(queue,j,k); MPaF
k = j; Fl8*dXG&
} CYkU-
} R-%v??
bxU2.YC
} ,v<GSiO
7S^ba
} l 1C'<+2j!
pf&H !-M
SortUtil： ')G,+d^
5t('H`,2
package org.rut.util.algorithm; R -#40
K14FY2"
import org.rut.util.algorithm.support.BubbleSort; G#uD CF,O
import org.rut.util.algorithm.support.HeapSort; 'BUix!k0<
import org.rut.util.algorithm.support.ImprovedMergeSort; UYLCzv~W
import org.rut.util.algorithm.support.ImprovedQuickSort; }o9fpo|
import org.rut.util.algorithm.support.InsertSort; ?LxBH-o(
import org.rut.util.algorithm.support.MergeSort; /2s=;tA1
import org.rut.util.algorithm.support.QuickSort; c\P,ct }>
import org.rut.util.algorithm.support.SelectionSort; kJP`C\4}f
import org.rut.util.algorithm.support.ShellSort; Dt#( fuk#
9K4]~_%h\
/** ;,WI_iP(w
* @author treeroot 5)@UpcjUA
* @since 2006-2-2 \}Hi\k+h':
* @version 1.0 W{@,DQ
*/ u)X]]6YJ
public class SortUtil { Fy6(N{hql
public final static int INSERT = 1; '}$]V>/
public final static int BUBBLE = 2; i#pBzJ
public final static int SELECTION = 3; eE=}^6)(*
public final static int SHELL = 4; v~B "Il
public final static int QUICK = 5; tZL|;K
public final static int IMPROVED_QUICK = 6; jV 'u*2&9
public final static int MERGE = 7; \86:f<)P
public final static int IMPROVED_MERGE = 8; ;:WM^S
public final static int HEAP = 9; t>KvR!+`g
$*\GZ$y>
public static void sort(int[] data) { 6d;_}
sort(data, IMPROVED_QUICK); G~ONHXL
} Vb57B.I
private static String[] name={ )i^+=TZq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {9c_T!c
}; r9 5hW
f,(@K%
private static Sort[] impl=new Sort[]{ E*"-U!?)l2
new InsertSort(), .Ce0yAl~
new BubbleSort(), QJH((
new SelectionSort(), y 1I(^<qO=
new ShellSort(), AqZ()p*z
new QuickSort(), A[hvT\X
new ImprovedQuickSort(), hY(q@_s
new MergeSort(), SHA6;y+U/~
new ImprovedMergeSort(), 'Szk!,_
new HeapSort() oC }
}; -)pVgf
<)]j;Tl
public static String toString(int algorithm){ v(GT+i)|
return name[algorithm-1]; Fs_zNN
} ^ZD0rp(l
b~td^
public static void sort(int[] data, int algorithm) { 6j6P&[
impl[algorithm-1].sort(data); D/`b~Yl
} .4%6_`E
Aq*,cOF+
public static interface Sort { :c3'U_H^
public void sort(int[] data); (GJX[$@
} _|C T|q
dXMO{*MF{H
public static void swap(int[] data, int i, int j) { @wTRoMHPQ
int temp = data; NGp^/PZX0
data = data[j]; &eIwlynm
data[j] = temp; SrT=XX,
} *USzzLq
} N 6t`45