[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; >Ifr [
} ZAW^/bo<
int i1=l; FDv<\2+ c
int i2=mid+1; On8v//=&
for(int cur=l;cur<=r;cur++){ Ozw.siD
if(i1==mid+1) '<gI8W</
data[cur]=temp[i2++]; mbKZJ{|4s
else if(i2>r) p99]
data[cur]=temp[i1++]; ^NLmgwQ
else if(temp[i1] data[cur]=temp[i1++]; Je';9(ZK
else -5)H<dAQZ
data[cur]=temp[i2++]; rbul8(1h
} `oAW7q)~
} L s G\OG
d}OTO10
} l.(v^3:X
\9.bt:k@OT
改进后的归并排序: a`wc\T^
C/_ZUF(V
package org.rut.util.algorithm.support; XP`Nf)3{Yd
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import org.rut.util.algorithm.SortUtil; %9 SJ E
j SHk{T!J
/** CYt?,qk-r
* @author treeroot M "ui0 ac
* @since 2006-2-2 bAdn &
* @version 1.0 #`~C)=-
*/ Zj_b>O-V
public class ImprovedMergeSort implements SortUtil.Sort { "N;`1ce
XUrXnz|>
private static final int THRESHOLD = 10; .[YuRLGz
.4S.>~^7
/* 1&\0:vA^Y
* (non-Javadoc) %Wg'i!?cB
* sm9k/(-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ] ;KJ6
*/ 3W V"U
public void sort(int[] data) { -6Z\qxKqZ
int[] temp=new int[data.length]; <xup'n^7C
mergeSort(data,temp,0,data.length-1); #+JG(^%B
} 9q)Kfz
rDl*d`He!
private void mergeSort(int[] data, int[] temp, int l, int r) { "<6G6?sz
int i, j, k; S&e0u%8mc
int mid = (l + r) / 2; .nTwPrG
if (l == r) ky8_UnaO
return; W=lyIb{?^0
if ((mid - l) >= THRESHOLD) \1d(9jR
mergeSort(data, temp, l, mid); M\vwI"
else a@8v^G
insertSort(data, l, mid - l + 1); $Y;U[_l#
if ((r - mid) > THRESHOLD) z__EYh
mergeSort(data, temp, mid + 1, r); -N6f1>}pE
else toLV4BtIG
insertSort(data, mid + 1, r - mid); &]V.S7LC#
5]~'_V
for (i = l; i <= mid; i++) { ^/uA?h:]\
temp = data; 'SO %)B
} >~#yu&*D
for (j = 1; j <= r - mid; j++) { !NIhx109q
temp[r - j + 1] = data[j + mid]; 09|K>UC)v
} b`(}.r?W
int a = temp[l]; Wfu(*
int b = temp[r]; w2;eh]k
for (i = l, j = r, k = l; k <= r; k++) { \j+1V1t9
if (a < b) { XYjV.j\
data[k] = temp[i++]; tG:25T0
a = temp; u$h 4lIl
} else { C](f>)Dz /
data[k] = temp[j--]; t\?ik6
b = temp[j]; # Nk;4:[
} :=}BN
} ? 8)'oMD
} Z.c'Hs+;
;"KJ7p
/** B%" d~5Y
* @param data cq5jPZ}
* @param l hM@ HA
* @param i >x/z7v?^I
*/ gRrL[z
private void insertSort(int[] data, int start, int len) { bT\1>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lun#^J
} D~biKrg?=
} *Tas`WA
} a!ud{Dx
} #G.ulX
2!0c4a^z
堆排序： BD68$y
wE[]6\_x1
package org.rut.util.algorithm.support; c(J!~7
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import org.rut.util.algorithm.SortUtil; ?QsQnQ
,">]`|?
/** QXL'^uO
* @author treeroot 1jCLO}
* @since 2006-2-2 %+f>2U4I
* @version 1.0 uPhK3nCGo
*/ %kv0Wefs
public class HeapSort implements SortUtil.Sort{ n\QgOSr<
~kQA7;`j$
/* (non-Javadoc) .}^g!jm~h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MTsM]o
*/ 9`wZz~hL"
public void sort(int[] data) { ?!;7:VIE
MaxHeap h=new MaxHeap(); S)lkz'tdk
h.init(data); E7NV ^4h
for(int i=0;i h.remove(); 9zZr^{lUl
System.arraycopy(h.queue,1,data,0,data.length); l%[EXZ
} M1 :uJkO.
t5[#x4 p
private static class MaxHeap{ >CrA;\l
yXz*5W_0D
void init(int[] data){ ,#Iu 7di
this.queue=new int[data.length+1]; }#.L7SIJ<J
for(int i=0;i queue[++size]=data; 6,)[+Bl
fixUp(size); ZZk=E4aae
} Ge2q%
} p=;=w_^y
^?U!pq-`
private int size=0; X<i^qoV
(0j}-iaQEZ
private int[] queue; 1>*#%R?W
gGr^@=;YC
public int get() { lV`Q{bd+
return queue[1]; +,2:g}5
} EKA#|^Q:NX
]+(6,ct&.
public void remove() { G;&-\0>W
SortUtil.swap(queue,1,size--); 'h/CoTk@,
fixDown(1); +g` 'J$
} KB%"bqB|
file://fixdown sp#p8@Cj
private void fixDown(int k) { ;gBRCZ
int j; PUF/#ck
while ((j = k << 1) <= size) { fF?z|
if (j < size %26amp;%26amp; queue[j] j++; qDv93
if (queue[k]>queue[j]) file://不用交换 {. 2k6_1[
break; c\iA89msp
SortUtil.swap(queue,j,k); T,]7ICF#
k = j; x$IX5:E#e
} Qy.w=80kf
} ?3*l{[@J
private void fixUp(int k) { ~p1j`r;
while (k > 1) { 3{ LP?w:@
int j = k >> 1; zhpx"{_
if (queue[j]>queue[k]) hCCiD9gz
break; t *1u[~=
SortUtil.swap(queue,j,k); {7$c8i
k = j; 'XZ)!1N
} MZlk0o2
} ~MS\
'`eO\huf
} ?**+e%$$
@n(Z$)8tR
} ?mWw@6G,
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SortUtil： ?%`@ub$
hvA^n@nr
package org.rut.util.algorithm; zoOaVV&1
'f[T&o&L/
import org.rut.util.algorithm.support.BubbleSort; VCn{mp*h
import org.rut.util.algorithm.support.HeapSort; >+]_5qc
import org.rut.util.algorithm.support.ImprovedMergeSort; zY,r9<I8_x
import org.rut.util.algorithm.support.ImprovedQuickSort; 1jy9lP=
import org.rut.util.algorithm.support.InsertSort; ^zt-HDBR_
import org.rut.util.algorithm.support.MergeSort; |55N?=8
import org.rut.util.algorithm.support.QuickSort; Z2TL#@
import org.rut.util.algorithm.support.SelectionSort; lD"(MQV@0
import org.rut.util.algorithm.support.ShellSort; O>^C4c!
"NgxkbDEbG
/** Ys,{8Y,7
* @author treeroot cgm81+[%r
* @since 2006-2-2 } w 5l
* @version 1.0 kMtwiB|7j
*/ UVw~8o9s
public class SortUtil { }RHn)}+
public final static int INSERT = 1; MxGu>r
public final static int BUBBLE = 2; Eo#u#IY
public final static int SELECTION = 3; %,D<O,N
public final static int SHELL = 4; A-4h
public final static int QUICK = 5; "Qja1TQ
public final static int IMPROVED_QUICK = 6; dHK`eS$sb
public final static int MERGE = 7; \|E^v6E%0
public final static int IMPROVED_MERGE = 8; 0%m)@ukb
public final static int HEAP = 9; g>dA$h%
q{t*34R
public static void sort(int[] data) { xZ4~Oo@@_'
sort(data, IMPROVED_QUICK); yqi^>Ce0
} B x (uRj
private static String[] name={ p;W.lcO`0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `FsH}UPu b
}; ]3g?hM6
L{(QpgHZ
private static Sort[] impl=new Sort[]{ 6xZ=^;H
new InsertSort(), 4\6N~P86
new BubbleSort(), )hk
new SelectionSort(), iVG-_RsKK
new ShellSort(), {K9/HqH
new QuickSort(), rMUT_^
new ImprovedQuickSort(), nWMmna.5
new MergeSort(), ( YQWbOk
new ImprovedMergeSort(), LE*h9((
new HeapSort() " t7M3i_
}; f|R"uW +
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public static String toString(int algorithm){ RTv qls
return name[algorithm-1]; DSt]{fl`P
} "dI;
(y M^
public static void sort(int[] data, int algorithm) { ]ut5S>,"
impl[algorithm-1].sort(data); FIbp"~
} jLpc Zb,
CT1ja.\;
public static interface Sort { v{9t]s>B
public void sort(int[] data); \mV'mZ9>
} +QE^\a
1}tbH[
public static void swap(int[] data, int i, int j) { *X4PM\ck
int temp = data; MW PvR|Q
data = data[j]; kiRa+w:
data[j] = temp; X+~ XJ
} bzvh%RsW
} c7M%xGrP