[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; s\3Z?zm8
} ux/[d6To
int i1=l; A+bubH,
int i2=mid+1; 2=Vkjh-
for(int cur=l;cur<=r;cur++){ o#KPrW`XJ/
if(i1==mid+1) 8m13M5r
data[cur]=temp[i2++]; ?L~=Z\H
else if(i2>r) )=SYJ-ta<
data[cur]=temp[i1++]; }X W#?l
else if(temp[i1] data[cur]=temp[i1++]; JVIcNK)
else "8C(_z+]K`
data[cur]=temp[i2++]; k*UR#z(I
} SjNwT[.nr7
} !]jNVg
L{o >D"
} +-KRp1qq
<}x|@u
改进后的归并排序: MIMPJXT#.
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package org.rut.util.algorithm.support; ?-6x]l=]
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import org.rut.util.algorithm.SortUtil; Z:o' +oh
v'2OHb#
/** Kw5+4R(5
* @author treeroot bju,p"J1-E
* @since 2006-2-2 #VMBn}
* @version 1.0 N%M>,wT
*/ BzG!Rg|J
public class ImprovedMergeSort implements SortUtil.Sort { fAA@ziKg
ss M9t
private static final int THRESHOLD = 10; 3\U,Kg
JwG5#CFu^
/* e^l+#^fR
* (non-Javadoc) 0 S`b;f
* oT5rX ,8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JXa%TpI: E
*/ :N'[de
public void sort(int[] data) { h}VYA\+<B
int[] temp=new int[data.length]; jJ{ w -$
mergeSort(data,temp,0,data.length-1); x.4)p6
} ` a<|CcUGU
URzE+8m^
private void mergeSort(int[] data, int[] temp, int l, int r) { fN? Lz%z3
int i, j, k; v.8S V]
int mid = (l + r) / 2; .qU%SmQ^
if (l == r) Pt)}HF|u
return; kHIQ/\3?Q
if ((mid - l) >= THRESHOLD) mYs->mg1
mergeSort(data, temp, l, mid); G QB^
else HI`A;G]
insertSort(data, l, mid - l + 1); p=5H^E m1
if ((r - mid) > THRESHOLD) MAhPO!e5.
mergeSort(data, temp, mid + 1, r); $R#L@iL-
else 5t1DB'K9$_
insertSort(data, mid + 1, r - mid); 5<GRi"7A@
:aFpz6<
for (i = l; i <= mid; i++) { p-03V"^&
temp = data; bJMcI8`
} ST[1'T+L
for (j = 1; j <= r - mid; j++) { "OAZ<
temp[r - j + 1] = data[j + mid]; Y Z2VP
} j!8+|eAkk
int a = temp[l]; {,mRMDEy
int b = temp[r]; v}*u[GWl]
for (i = l, j = r, k = l; k <= r; k++) { N)I T?
if (a < b) { ,8 NEnB
data[k] = temp[i++]; l$~bkVNL
a = temp; 7|eSvC
} else { +Q#Qu0_
data[k] = temp[j--]; _w,0wn9N$
b = temp[j]; 5$G??="K
} Xq)%w#l5?
} '!L1z45
} ob5nk^y
0*M}QXt
/** Y,Zv0-"
* @param data :H8L(BsI
* @param l g[+Q~/yq
* @param i ZJ}LnPr
*/ 7wEG<,D
private void insertSort(int[] data, int start, int len) { D\&y(=fzf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N'BctKL
} T-8nUo}i
} Y/I6.K3
} aZCT|M1
} pC.T)k
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堆排序： m-FDCiN>
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package org.rut.util.algorithm.support; .E8p-R5)V>
EuA<{%i
import org.rut.util.algorithm.SortUtil; 7?WBzo!!L
cTx/Y&\9
/** 6 &Aa b56
* @author treeroot SpiC0
* @since 2006-2-2 f0bV]<_9
* @version 1.0 =v=!x
*/ yQ&%* ?J
public class HeapSort implements SortUtil.Sort{ 1b%7FrPkd
R'HA>?D
/* (non-Javadoc) \ OINzfbr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Afl'-
*/ 17 iq
public void sort(int[] data) { ga9:*G!b{)
MaxHeap h=new MaxHeap(); =0yJ2[R7Do
h.init(data); &/FwV'
for(int i=0;i h.remove(); xyWdzc](p
System.arraycopy(h.queue,1,data,0,data.length); .TS=[WGMS
} :Rx"WY
la7QN QW
private static class MaxHeap{ ]Wm ?<7H
&nw~gSe
void init(int[] data){ Ou,_l
this.queue=new int[data.length+1]; ZTC1t_
for(int i=0;i queue[++size]=data; z6r/ w
fixUp(size); ,PxQ[CGg
} wo9f99
} [mvHa;-w
3+uoK f[
private int size=0; XB 7^Ka
uL AXN
private int[] queue; " CoR?[,x
,]qX_`qF
public int get() { ]}y'3aW
return queue[1]; nQ3goVRFP
} WN1-J(x6
C P v}A
public void remove() { 4ux5G`oL
SortUtil.swap(queue,1,size--); <t@*[Aw
fixDown(1); ID+k`nP
} Mwk_SCy
file://fixdown cBf{R^>Fd
private void fixDown(int k) { ^C|9K>M
int j; _oVA0@#n
while ((j = k << 1) <= size) { ?{")Wt
if (j < size %26amp;%26amp; queue[j] j++; =@
if (queue[k]>queue[j]) file://不用交换 (.+n1)L?
break; YcZ4y@6"
SortUtil.swap(queue,j,k); MX\-)e#
k = j; W/Q%%)J
} N)Kr4GC
} @ xr
private void fixUp(int k) { EIm\!'R]
while (k > 1) { XnOl*#P
int j = k >> 1; M3`A&*\;
if (queue[j]>queue[k]) kn|l3+
break; U8z"{
SortUtil.swap(queue,j,k); dig76D_[e
k = j; p ivS8C
} 2oASz|
} @'4D9A
k@U`?7X
} [nD4\x+
XePBA J
} Jj:4@p:
X jN.X
SortUtil： Q6>( Z
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package org.rut.util.algorithm; HpAZ{P7
*X=-^\G
import org.rut.util.algorithm.support.BubbleSort; KL`>mJo$
import org.rut.util.algorithm.support.HeapSort; v}D!
import org.rut.util.algorithm.support.ImprovedMergeSort; *?&O8SSBH
import org.rut.util.algorithm.support.ImprovedQuickSort; iK:]Q8b
import org.rut.util.algorithm.support.InsertSort; RVnYe='
import org.rut.util.algorithm.support.MergeSort; $g;xw?~#
import org.rut.util.algorithm.support.QuickSort; "FS.&&1(
import org.rut.util.algorithm.support.SelectionSort; L9)&9 /f
import org.rut.util.algorithm.support.ShellSort; |pY0IqO
RoRVu,1
/** rd{(E
* @author treeroot SbivW5|61
* @since 2006-2-2 X_l,fu^C#$
* @version 1.0 )v0vdAh'b
*/ jp`N%O]6
public class SortUtil { `_)dEu
public final static int INSERT = 1; ;0gpS y$#
public final static int BUBBLE = 2; mo$*KNW%\
public final static int SELECTION = 3; k>`X! "
public final static int SHELL = 4; I),8EEf\
public final static int QUICK = 5; 4[q *7m
public final static int IMPROVED_QUICK = 6; JK`P mp>
public final static int MERGE = 7; 5yID%
public final static int IMPROVED_MERGE = 8; 'h6RZKG T
public final static int HEAP = 9; h6t>yC\
1 Y&d%AA
public static void sort(int[] data) { .YRSd
sort(data, IMPROVED_QUICK); YSif`W!
} P+UK@~D+G
private static String[] name={ cj *4XYu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,YTIYG](
}; p2K9R4
gKCIfxM
private static Sort[] impl=new Sort[]{ "Wp<^ssMo
new InsertSort(), Le!I-i(aD
new BubbleSort(), < r~Tj
new SelectionSort(), ehq6.+l
new ShellSort(), }o4Cd$,8
new QuickSort(), 2Mda'T8
new ImprovedQuickSort(), kn\>ZgU
new MergeSort(), Y')+/<Q2E
new ImprovedMergeSort(), b'YbHUyu
new HeapSort() Zpmy)W]1
}; #UQ[8e
sh1()vT
public static String toString(int algorithm){ U|nk86r
return name[algorithm-1]; i}19$x.D`
} ,R+u%bmn#
($kwlj~c
public static void sort(int[] data, int algorithm) { JSU\Hh!
impl[algorithm-1].sort(data); Y$^\D'.k
} [6|vx},N
jo~Pr
public static interface Sort { `upNP/,
public void sort(int[] data); MR}\fw$(.
} _c2#
x3Uv&
public static void swap(int[] data, int i, int j) { :-)[B^0
int temp = data; EIRf6jL
data = data[j]; V_* ^2c)
data[j] = temp; =j0V/=
} [>;O'>
} @!$NUY8,A#