[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; qydRmi
} U>-GM>
int i1=l; h`@z61UI
int i2=mid+1; p[8H!=`K
for(int cur=l;cur<=r;cur++){ Y(<(!TJ-
if(i1==mid+1) ]}Jb'(gMO4
data[cur]=temp[i2++]; J5zKwt
else if(i2>r) tt03gU`
data[cur]=temp[i1++]; {5NE jUu{j
else if(temp[i1] data[cur]=temp[i1++]; Jwtt&" c0.
else 3P|z`}Ka
data[cur]=temp[i2++]; 5L0w!q'W
} *km!<L7Y
} q&nEodv>+
Maw$^Tz,
} aJzyEb
n_/;j$h
改进后的归并排序: 5{|tE!
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package org.rut.util.algorithm.support; ($X2SIZh
*G"}m/j-
import org.rut.util.algorithm.SortUtil; NcyE_T
i$g6C
/** Fp(-&,L0fc
* @author treeroot zLSha\X
* @since 2006-2-2 VD90JU]X<
* @version 1.0 m5%E1k$=
*/ vWZ?*0^
public class ImprovedMergeSort implements SortUtil.Sort { iI$;%uY3g
w\}Q.$@
private static final int THRESHOLD = 10; \GdsQAF"
O|mWQp^?q
/* [+wLy3_
* (non-Javadoc) 8=,?Bh".
* ~(-df>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;8Ts
*/ YfUo=ku
public void sort(int[] data) { XNr8,[c
int[] temp=new int[data.length]; 9`Y\`F#}q
mergeSort(data,temp,0,data.length-1); rebWXz7
} ZRP[N)Ld$
e8U6D+jY
private void mergeSort(int[] data, int[] temp, int l, int r) { ^5Ob(FvU
int i, j, k; 4vMjVbr
int mid = (l + r) / 2; /_V4gwb}|-
if (l == r) Is(ZVI
return; 'EO"0,
if ((mid - l) >= THRESHOLD) qpX`ZY^
mergeSort(data, temp, l, mid); k&pV`.Imi
else %g7B*AX]
insertSort(data, l, mid - l + 1); 3a?dNwM@
if ((r - mid) > THRESHOLD) .|/VD'xV"
mergeSort(data, temp, mid + 1, r); [u;>b?[{
else ]owcx=5q%'
insertSort(data, mid + 1, r - mid); ~kOXMLRg
2SXy)m !
for (i = l; i <= mid; i++) { OP98sd&T
temp = data; UW],9r/PD@
} 4v#A#5+O E
for (j = 1; j <= r - mid; j++) { =PmIrvr'[5
temp[r - j + 1] = data[j + mid]; Tilw.z
} feT.d +Fd
int a = temp[l]; . sv uXB
int b = temp[r]; rds0EZ4W
for (i = l, j = r, k = l; k <= r; k++) { h9cx~/7,_)
if (a < b) { )vD|VLV
data[k] = temp[i++]; W744hq@P%
a = temp; ?Vc/mO2X
} else { *|S{%z9>
data[k] = temp[j--]; 7,2#0Z`ge
b = temp[j]; >_u5"&q
} DxzNg_E]
} "64D.c(r$
} hOr4C4
<(x!P=NM-
/** nzl3<Ar
* @param data :Y[?@/m4
* @param l xX\A&9m
* @param i w!/|aZ~*
*/ x-HR[{C
private void insertSort(int[] data, int start, int len) { %!V=noo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T-.Bof(?w
} jWGX:XB
} wQrD(Dv(yA
} RO.bh#A$
} : G0^t
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堆排序： dRXdV7-!
;s w3MRJ
package org.rut.util.algorithm.support; 'ExTnv ~
pTE.,~-J^j
import org.rut.util.algorithm.SortUtil; B0ZLGB
%VGQ{:
/** T#=&oy7
* @author treeroot M<3m/l%`Y
* @since 2006-2-2 r=ht:+m
* @version 1.0 cE3V0voSw1
*/ Y@'ahxF
public class HeapSort implements SortUtil.Sort{ r&O:Bt}x
csms8J
/* (non-Javadoc) 3.?B')
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E>NL/[1d
*/ v$EgVcK
public void sort(int[] data) { "xE;IpO[
MaxHeap h=new MaxHeap(); G-G\l?R(
h.init(data); Wfj*)j Q
for(int i=0;i h.remove(); 3R[,,WAj$
System.arraycopy(h.queue,1,data,0,data.length); (d}z>?L
} (!dwUB
TuMD+^x
private static class MaxHeap{ c7/fQc)h4d
@^K_>s9B
void init(int[] data){ [p 8fg!|
this.queue=new int[data.length+1]; d>jRw
for(int i=0;i queue[++size]=data; T`r\yl}
fixUp(size); ZsL-vlv
} Q=.j>aM+_
} -LMO f[v?
.6y(ox|LL
private int size=0; x#TWZ;
m|k:wuzqK
private int[] queue; -%g{{'9B
o>ZlA3tv
public int get() { =f-.aq(G/
return queue[1]; #{Gojg`5O
} gTqtTd~L
N0']t Gh2
public void remove() { m|cT)-
SortUtil.swap(queue,1,size--); tC'@yX
fixDown(1); ^|h})OHV
} DX4"}w
file://fixdown #wL8=QTcNC
private void fixDown(int k) { I,YP{H4
int j; GeCyq%dN
while ((j = k << 1) <= size) { Zmr*$,v<y
if (j < size %26amp;%26amp; queue[j] j++; gj<Y+Dv>
if (queue[k]>queue[j]) file://不用交换 t 4tXLI;'
break; pk2}]jx"
SortUtil.swap(queue,j,k); S1a}9Z|
k = j; 4XsKOv
} 2Uq4PCx!
} I\oI"\}U
private void fixUp(int k) { %.n 7+
while (k > 1) { F/zbb
int j = k >> 1; o&vODs
if (queue[j]>queue[k]) f/K:~#k
break; Z|dng6ck
SortUtil.swap(queue,j,k); 4.0JgX
k = j; B:QAG
} O)WduhlGQ
} kpt0spp
UXN!iU)
} 7s-ZRb[)1
]U,f}T"e
} Kh;jiK !
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SortUtil： .j_YVYu1&
iPoDesp
package org.rut.util.algorithm; (>gAnebN L
PgF7ug%,@C
import org.rut.util.algorithm.support.BubbleSort; om'DaG`A
import org.rut.util.algorithm.support.HeapSort; +:fr(s!OE
import org.rut.util.algorithm.support.ImprovedMergeSort; ??.9`3CYo
import org.rut.util.algorithm.support.ImprovedQuickSort; C!r9+z)<
import org.rut.util.algorithm.support.InsertSort; 6Jf\}^4@k
import org.rut.util.algorithm.support.MergeSort; _& qM^
import org.rut.util.algorithm.support.QuickSort; {=GWQn6cc
import org.rut.util.algorithm.support.SelectionSort; fb||q-E
import org.rut.util.algorithm.support.ShellSort; 6su^yt
-H;p +XAY
/** ]$gBX=
* @author treeroot @(_M\>!%M
* @since 2006-2-2 fooQqWC)
* @version 1.0 Q-LDFnOFwp
*/ .|g67PH=
public class SortUtil { A(>kp=~
public final static int INSERT = 1; ]jL`*tI\S
public final static int BUBBLE = 2; 3d0Yq
public final static int SELECTION = 3; zHsWj^m"
public final static int SHELL = 4; (1my9k5C
public final static int QUICK = 5; Q~p[jQ,4wZ
public final static int IMPROVED_QUICK = 6; ]C me)&hX
public final static int MERGE = 7; umD[4aP~;
public final static int IMPROVED_MERGE = 8; A&~<qgBTp
public final static int HEAP = 9; E6NrBPm
>9v?p=
public static void sort(int[] data) { Pxn;]!Z#
sort(data, IMPROVED_QUICK); \x_fP;ma=_
} G~\ SI.
private static String[] name={ '/"xMpN4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $2j?Z.yEG
}; yIdM2#`u
Ltt+BUJc
private static Sort[] impl=new Sort[]{ ^?3e?Q?
new InsertSort(), ird q51{G
new BubbleSort(), I3ZbHb-)_,
new SelectionSort(), >^Zyls
new ShellSort(), )~X*&(7RR}
new QuickSort(), O]Mz1 ev|
new ImprovedQuickSort(), '<YVDB&-d,
new MergeSort(), _(<D*V[
new ImprovedMergeSort(), 9-9:]2~g!
new HeapSort() cNd2XQB9=
}; FGP~^Dr/
68^5X"OGF
public static String toString(int algorithm){ Dx-G0 KIG
return name[algorithm-1]; zkt+"P{az[
} m8|&z{
H' [#x2
public static void sort(int[] data, int algorithm) { +|w-1&-
impl[algorithm-1].sort(data); Z=vzF0
} jBvZ>H+w~
/}Z0\,
public static interface Sort { - :0{
public void sort(int[] data); lTh}0t
} G 39
N8>;BHBV!
public static void swap(int[] data, int i, int j) { ktr l|
int temp = data; Hlw0ia
data = data[j]; v<`1z?dch
data[j] = temp; EQ j2:9f
} f V|Zh
} vh~:{akR