[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; b .9]b
} \>0F{-cR$
int i1=l; ebk{p<
int i2=mid+1; /1X0h
for(int cur=l;cur<=r;cur++){ 7 4rmxjiN
if(i1==mid+1) "hRw_<
data[cur]=temp[i2++]; h:QKd!Gq
else if(i2>r) zh5{t0E}C
data[cur]=temp[i1++]; 'jp nQcwxx
else if(temp[i1] data[cur]=temp[i1++]; n7~!klF-
else Xrnxpp!#^D
data[cur]=temp[i2++]; &gc8"B@V
} $M\[^g(q
} owA3>E5t&
h,Y MR3:X
} g`KVF"8
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改进后的归并排序: K~nk:}3Ui
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package org.rut.util.algorithm.support; ]a|3"DP5
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import org.rut.util.algorithm.SortUtil; <wwcPe}
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/** }a@ZFk_>
* @author treeroot oD,f5Ci-
* @since 2006-2-2 ehEXC
* @version 1.0 $rf4h]&<
*/ |xaJv:96%
public class ImprovedMergeSort implements SortUtil.Sort { L|G!of[8n
)L#C1DP#
private static final int THRESHOLD = 10; _%Ay\4H^\
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/* )f4D2c&VE
* (non-Javadoc) IC}?oXs5G
* hvu>P {
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :<d\//5<9
*/ CQfrAk4mu
public void sort(int[] data) { Xui${UYN
int[] temp=new int[data.length]; ouKID_'
mergeSort(data,temp,0,data.length-1); U6qv8*~
} >`DbT:/<
$NP5Z0v7
private void mergeSort(int[] data, int[] temp, int l, int r) { 'pOtd7Vr
int i, j, k; WAiEINQ^)
int mid = (l + r) / 2; UD[S>{
if (l == r) 03L"W^gc
return; -}k'a{sj=
if ((mid - l) >= THRESHOLD) S1^u/$*6
mergeSort(data, temp, l, mid); '2=u<a B
else fAWjk&9
insertSort(data, l, mid - l + 1); GP ;c$pC
if ((r - mid) > THRESHOLD) /=4P<&J
mergeSort(data, temp, mid + 1, r); 8Dpf{9Y-E
else V%&t'H{
insertSort(data, mid + 1, r - mid); haW8zb0z
[6qa"Ie
for (i = l; i <= mid; i++) { ~*-ar6
temp = data; p8y_uNQE
} `pY\Mmgv1
for (j = 1; j <= r - mid; j++) { ^a|$z$spf
temp[r - j + 1] = data[j + mid]; l(9$s4R
} ''!pvxA
int a = temp[l]; 6\4ny0
int b = temp[r]; Q17"hO>kC
for (i = l, j = r, k = l; k <= r; k++) { m` cw:
if (a < b) { i](,s.
data[k] = temp[i++]; hb9X<N+p
a = temp; ~u1ox_v`%(
} else { IjN3 jU
data[k] = temp[j--]; Rk^Fasg"
b = temp[j]; hu\HK81m
} TCp!4-~,
} &$ F0
} ~6@zXHAS
Mw7!w-1+
/** 6cSMKbgZJ
* @param data gs 8w/
* @param l ws tI8">
* @param i hC<X\yxe
*/ I"@X~Y7}
private void insertSort(int[] data, int start, int len) { 3tI=?E#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N+l~r]: &
} C.s{&
} V4qHaG
} %@$h?HP
} ^G=wRtS
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堆排序： R B.j@*
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package org.rut.util.algorithm.support; a*CP1@O
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import org.rut.util.algorithm.SortUtil; 5}9-)\8=z
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/** KpC)A5u6
* @author treeroot t*<vc]D
* @since 2006-2-2 +@]1!|@(
* @version 1.0 \l{*1lQ`
*/ 0{v?
public class HeapSort implements SortUtil.Sort{ n)} J<
4DEsB)%X
/* (non-Javadoc) =b32E^z,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b@^M|h.Va
*/ @S?.`o
public void sort(int[] data) { V-A^9AAPm
MaxHeap h=new MaxHeap(); 3{Ze>yFE
h.init(data); /`\-.S9
for(int i=0;i h.remove(); &[*_ -
System.arraycopy(h.queue,1,data,0,data.length); dVVeH\o
} Y@KZ:0<
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private static class MaxHeap{ tA#X@HIE
Yp 6;Y7^
void init(int[] data){ #lltXqvD?
this.queue=new int[data.length+1]; Qat%<;P2
for(int i=0;i queue[++size]=data; >1pD'UZIy7
fixUp(size); z:u`W#Rf
} =d~]*[8
} $DA0lY\
&-<"HW
private int size=0; M42Zpb].
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private int[] queue; ^Q!:0D*
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public int get() { r4+w?=`
return queue[1]; lx$Y-Tb^F
} Q)#<T]~=
`Kym{og
public void remove() { {Hp?rY@
SortUtil.swap(queue,1,size--); [7<X&Q
fixDown(1); ]|u}P2
} #Yw^n?~~
file://fixdown [2i+f<
private void fixDown(int k) { %T'?7^\>
int j; ^l$(-#'y
while ((j = k << 1) <= size) { b8b-M]P-=
if (j < size %26amp;%26amp; queue[j] j++; O b8[P=
if (queue[k]>queue[j]) file://不用交换 rA`zuYo
break; R%#c~NOO
SortUtil.swap(queue,j,k); |]GEJUWtCd
k = j; dZ%b|CUb
} Jk{>*jYk`
} ,<EmuEw |
private void fixUp(int k) { v[Q)cqj/
while (k > 1) { 7e8hnTzl8<
int j = k >> 1; S BFhC
if (queue[j]>queue[k]) GK&yP%Z3
break; M<ad>M
SortUtil.swap(queue,j,k); g!~j Wn?A
k = j; WZm^:,
} an5Ss@<4AA
} DVB:8"Bu
e. [+xOu`
} \&TTe8
J&3;6I &
} 3_h%g$04s
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SortUtil： ?5(L.XFm
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package org.rut.util.algorithm; `Mjm/9+18
[")0{LSA=
import org.rut.util.algorithm.support.BubbleSort; yBl<E$=
import org.rut.util.algorithm.support.HeapSort; jV<LmVcZY
import org.rut.util.algorithm.support.ImprovedMergeSort; 'R'>`?Nh
import org.rut.util.algorithm.support.ImprovedQuickSort; KDXo9FzF
import org.rut.util.algorithm.support.InsertSort; ]$L[3qA.
import org.rut.util.algorithm.support.MergeSort; Fe=4^.
import org.rut.util.algorithm.support.QuickSort; PN'8"8`{
import org.rut.util.algorithm.support.SelectionSort; 78.sf{I
import org.rut.util.algorithm.support.ShellSort; 'P~*cr ?A
.1pEq~>
/** t&&OhHK
* @author treeroot JBwTmOvQ
* @since 2006-2-2 `Ch6"=t
* @version 1.0 kEXcEF_9P
*/ HhpP}9P;
public class SortUtil { \;?\@vo<
public final static int INSERT = 1; }`MO}Pz
public final static int BUBBLE = 2; ]Yj>~k:K
public final static int SELECTION = 3; Kz<xuulr
public final static int SHELL = 4; .Yf h*
public final static int QUICK = 5; [-CG&l2?L
public final static int IMPROVED_QUICK = 6; ex|kD*=
public final static int MERGE = 7; zJsoenU
public final static int IMPROVED_MERGE = 8; =CVw0'yZ
public final static int HEAP = 9; ,S5#Kka~a
$`oA$E3
public static void sort(int[] data) { bo*q{@Ue
sort(data, IMPROVED_QUICK); /Mk)H d
} x)?\g{JH
private static String[] name={ ]SPB c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E??%)q
}; %*gO<U4L]
w %zw+E
private static Sort[] impl=new Sort[]{ SH(kUL5
new InsertSort(), VsmL#@E
new BubbleSort(), 4w?7AI]Ej
new SelectionSort(), xC{NIOYn'
new ShellSort(), 9=o b:
new QuickSort(), HUghl2L.<
new ImprovedQuickSort(), |-mazvA
new MergeSort(), N:<O
new ImprovedMergeSort(), $W?XxgkB?
new HeapSort() 6a@~;!GlI
}; 6Te}"t>
Gw./qu-W
public static String toString(int algorithm){ zb" hy"hKw
return name[algorithm-1]; .$k"+E
} J v#^GNm
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public static void sort(int[] data, int algorithm) { HZm i?
impl[algorithm-1].sort(data); |rvrSab)
} Z]Y4NO;
lP e$AI
public static interface Sort { 6:,^CI|@t
public void sort(int[] data); d.AjH9 jg
} eTc`FXw`
`@M4THt
public static void swap(int[] data, int i, int j) { [FL I+;gY
int temp = data; R u5&xIQ
data = data[j]; @>]3xHE6#=
data[j] = temp; ~Hs{(7
} %Let AR
} `VsGa