[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; KBj@V6Q
} r0uJ$/!
int i1=l; 8<c'x]~
int i2=mid+1; D-D#`
for(int cur=l;cur<=r;cur++){ zzE]M}s
if(i1==mid+1) WL/5 oj
data[cur]=temp[i2++]; Ys%'#f
else if(i2>r) tNB%eb{
data[cur]=temp[i1++]; I1i:}g/
else if(temp[i1] data[cur]=temp[i1++]; q;No"_aAd
else L6xB`E9
data[cur]=temp[i2++]; hpas'H>J
} SctJxY(}!
} T+(M8qb
p9Z].5Pd"
} /} a_8iM\
bw020@O*
改进后的归并排序: H7}g!n?
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package org.rut.util.algorithm.support; LS{bg.e
%rw}u"3T
import org.rut.util.algorithm.SortUtil; ]2PQ X4t0
[bsXF#
/** )# p.`J
* @author treeroot 6UO$z-e
* @since 2006-2-2 Enu!u~1]F
* @version 1.0 _tA7=*@8
*/ nPcxknl(pd
public class ImprovedMergeSort implements SortUtil.Sort { <c(&T<$
m^'~&!ba
private static final int THRESHOLD = 10; }|SIHz!R
'V1!&Q6
/* D(!;V KH
* (non-Javadoc) PP],HB+*[
* CX]RtV!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?P%|P
*/ )=y.^@UT@
public void sort(int[] data) { Jb7iBQ2%
int[] temp=new int[data.length]; b'&LBT7
mergeSort(data,temp,0,data.length-1); 40R"^*
} y2GQN:X
b$dBV}0 L
private void mergeSort(int[] data, int[] temp, int l, int r) { 1E8$% 6VV
int i, j, k; k]t,q$Vd
int mid = (l + r) / 2; (v]P<3%
if (l == r) 7,f:Qi@g
return; ccRlql(
if ((mid - l) >= THRESHOLD) JR])xPI`
mergeSort(data, temp, l, mid); ZTr:xX{R6
else (Z5q&#f
insertSort(data, l, mid - l + 1); 3'.! +#
if ((r - mid) > THRESHOLD) Fs?( UM
mergeSort(data, temp, mid + 1, r); DE5d]3B
else NS h%t+XU]
insertSort(data, mid + 1, r - mid); SE6>vKR/.
Tc9&mKVE%(
for (i = l; i <= mid; i++) { 6euR'd^Qi
temp = data; (qJIu
} u.$Ym
for (j = 1; j <= r - mid; j++) { K/!/M%GB6
temp[r - j + 1] = data[j + mid]; a:=q8Qy
} |Uc<;> l
int a = temp[l]; "w>rlsT<O
int b = temp[r]; ,NjX&A@
for (i = l, j = r, k = l; k <= r; k++) { yZ?xt'tn
if (a < b) { Cq-hPa}2
data[k] = temp[i++]; Qk?jGXB>^
a = temp; AqKHjCI
} else { 7ESN!
data[k] = temp[j--]; 0PYvey }[
b = temp[j]; W/b"a?wE{
} KX0<j
} =AWX +znP
} TFAYVK~
-0{T
/** ;7;zhJs1t
* @param data Su$18a"Bc
* @param l K4iI:
* @param i J@oEV=L
*/ `6|i&w:b
private void insertSort(int[] data, int start, int len) { Gtj(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); { z-5GH|
} 6XQ*:N/4al
} yTzY?
} pYYqGv^oa
} p>2||
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堆排序： t#fs:A7P?}
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package org.rut.util.algorithm.support; b=6MFPbg
aR`_h=a
import org.rut.util.algorithm.SortUtil; `4q5CJ2
p:DL:^zx
/** jlYD~)
* @author treeroot ygmv_YLjm
* @since 2006-2-2 ^n\9AE3
* @version 1.0 Q%M'[L?[
*/ _myg._[
public class HeapSort implements SortUtil.Sort{ +)/Rql(lY
!^c:'I>~
/* (non-Javadoc) (|yRo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }*fW!(*
*/ LydbP17K}
public void sort(int[] data) { [@,OG-"&
MaxHeap h=new MaxHeap(); b*I&k":
h.init(data); "#mXsp-ut
for(int i=0;i h.remove(); MgJ%26TZ
System.arraycopy(h.queue,1,data,0,data.length); .){e7U6b{
} Q3<bC6$r
6vD]@AF
private static class MaxHeap{ "D ts*
ua]\xBWx
void init(int[] data){ 1g~Dm}m
this.queue=new int[data.length+1]; dWzDSlP&
for(int i=0;i queue[++size]=data; 9_M H
fixUp(size); AijPN
} R-r+=x&
} kPx]u\
baUEsg[~V
private int size=0; u4b3bH9U
OPvj{Dv$0
private int[] queue; 2ru*#Z#(
&^CL]&/
public int get() { TIK/%T
return queue[1]; d&PE,$XC
} aH5t.x79b
]t.WJC %
public void remove() { ue6/EN;}
SortUtil.swap(queue,1,size--); "VT{1(]t
fixDown(1); 'Yaf\Hp
} [M7iJcwt
file://fixdown 9[t]]
private void fixDown(int k) { U<ku_(2"#
int j; fd!pM4"0
while ((j = k << 1) <= size) { .NV)hg)|cZ
if (j < size %26amp;%26amp; queue[j] j++; <'>d0:>N
if (queue[k]>queue[j]) file://不用交换 (]zl$*k
break; u):%5F/
SortUtil.swap(queue,j,k); 5@R15q@c6n
k = j; N[+o[%A
} ohQz%?r
} 2g ?Jb5)
private void fixUp(int k) { ?;ALF
while (k > 1) { +H)!uLvaB
int j = k >> 1; F?RCaj
if (queue[j]>queue[k]) E5Snl#Gl\0
break; M@!]U:5~V
SortUtil.swap(queue,j,k); h|c:!VN@
k = j; Zi<Sw
} |(J ?#?
} X_0{*!v8
(04j4teE
} m5'__<
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} (zM+7tJH
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SortUtil： 4Rrw8Bw
T|BY00Sz`
package org.rut.util.algorithm; *s<dgFA'
72s$
import org.rut.util.algorithm.support.BubbleSort; fUL{c,7xda
import org.rut.util.algorithm.support.HeapSort; 9sO{1rF
import org.rut.util.algorithm.support.ImprovedMergeSort; \fM!^
import org.rut.util.algorithm.support.ImprovedQuickSort; YVZSKU
import org.rut.util.algorithm.support.InsertSort; <Hr@~<@~
import org.rut.util.algorithm.support.MergeSort; _,K>u6N&
import org.rut.util.algorithm.support.QuickSort; vUIK4uR.
import org.rut.util.algorithm.support.SelectionSort; @WDqP/4
import org.rut.util.algorithm.support.ShellSort; gKm~cjCB`~
o{-USUGj7
/** <-oRhi4
* @author treeroot fbx;-He!
* @since 2006-2-2 M*T# 5
* @version 1.0 G"UH4n[1ur
*/ Tm~#wL +r
public class SortUtil { g6a3MJV`
public final static int INSERT = 1; {L2Gb(YLW
public final static int BUBBLE = 2; 8w@W8(3B
public final static int SELECTION = 3; 5f`XFe$8
public final static int SHELL = 4; }~\].I6
public final static int QUICK = 5; 1Sc~Vb|>
public final static int IMPROVED_QUICK = 6; -Bwu$$0
public final static int MERGE = 7; $RFu m'`5
public final static int IMPROVED_MERGE = 8; uTlT'9)
public final static int HEAP = 9; nO.+&kA
$85o%siS'
public static void sort(int[] data) { 9jzLXym
sort(data, IMPROVED_QUICK); 2S10j%EeI
} :PjUl
private static String[] name={ Mb/6>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zH\;pmWiN9
}; r;6YCI=z
PS<tS_.
private static Sort[] impl=new Sort[]{ 7!yF5+_d
new InsertSort(), my\oC^/9
new BubbleSort(), Ef*.}gcU
new SelectionSort(), nTtt$I@hW
new ShellSort(), I(kIHjV|
new QuickSort(), b%~3+c
new ImprovedQuickSort(), uu/7Ie
new MergeSort(), .STf
new ImprovedMergeSort(), N,+g/o\f
new HeapSort() ^fiRRFr[
}; E#V-F-@2
<.%8j\j(
public static String toString(int algorithm){ 68br
return name[algorithm-1]; 9M~$W-5
} 8}`8lOE7
GDQg:MgX
public static void sort(int[] data, int algorithm) { /ykxVCvAt
impl[algorithm-1].sort(data); 4Jy,IKPp
} "7g8 d
BL^Hj
public static interface Sort { l#f]KLv4N_
public void sort(int[] data); dSD}NM
} n[S*gX0
CpdY)SMSL
public static void swap(int[] data, int i, int j) { Us~wv"L=UX
int temp = data; /%'7sx[p
data = data[j]; (eIxU&o'
data[j] = temp; "1TM
} ;HwJw\fo
} MP&4}De