[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; /:U\U_j
} *(o~pxFTR
int i1=l; gtCd#t'(V
int i2=mid+1; s=U_tfpH
for(int cur=l;cur<=r;cur++){ J tYnBg?[E
if(i1==mid+1) lg1?g)lv
data[cur]=temp[i2++]; q'K=Ly+
else if(i2>r) )W*S6}A
data[cur]=temp[i1++]; g%9I+(?t
else if(temp[i1] data[cur]=temp[i1++]; #1V vK
else mjB%"w!S
data[cur]=temp[i2++]; #G9S[J=xe
} g w}t.3}
} -] J V
6\b B#a
} E>SnH
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改进后的归并排序: 8LR_K]\
%Vive2j C
package org.rut.util.algorithm.support; roW8 4x
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import org.rut.util.algorithm.SortUtil; w(.k6:e
Bv!j.$0d{
/** WBTX~%*U
* @author treeroot =3/||b4c
* @since 2006-2-2 %4+r&
* @version 1.0 tR0o6s@v/<
*/ oh#6>|
public class ImprovedMergeSort implements SortUtil.Sort { $Wb"X=}tl
9<\wa/#
private static final int THRESHOLD = 10; ]hL 1qS
Td"f(&Hk&
/* Wd&!##3$Q
* (non-Javadoc) vPSH
* [T~O%ly7x&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'iUfr@
*/ GG%j+Ed
public void sort(int[] data) { }MXZ
int[] temp=new int[data.length]; EiIbp4*e
mergeSort(data,temp,0,data.length-1); J%3S3C2*m
} ZqS'xN:k
}&`#
private void mergeSort(int[] data, int[] temp, int l, int r) { 0=L:8&m
int i, j, k; ~A [ Ju%R
int mid = (l + r) / 2; }|{yd03+
if (l == r) C!RxMccTh
return; d8dREhK&
if ((mid - l) >= THRESHOLD) 'UW7zL5
mergeSort(data, temp, l, mid); jyLpe2 S
else Ok2k; +l
insertSort(data, l, mid - l + 1); QZt/Rm>W0
if ((r - mid) > THRESHOLD) u|O5ZV-cd
mergeSort(data, temp, mid + 1, r); J3y5R1?EP
else 0@^YxU[YN
insertSort(data, mid + 1, r - mid); !-LPFy>
SDDs}mV
for (i = l; i <= mid; i++) { 552c4h/T
temp = data; )5Gzk&|
} @&mv4zz&W
for (j = 1; j <= r - mid; j++) { qmtVk
temp[r - j + 1] = data[j + mid]; X2q$i
} I_'vVbK+>
int a = temp[l]; zSj.Y{J
int b = temp[r]; &6r".\;^
for (i = l, j = r, k = l; k <= r; k++) { P0k|33;7L
if (a < b) { {cq; SH
data[k] = temp[i++]; =ni&*&
a = temp; o24`5Jdh
} else { DJ[U^dWRn
data[k] = temp[j--]; L8/o9N1
b = temp[j]; -O^b
} kIP~XV~
} `c(,_oa{
} Rfeiv
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/** %* vYX0W"
* @param data -`&4>\o2Lx
* @param l P/,7CfyPd
* @param i leg@ia
*/ "Yq-s$yBi
private void insertSort(int[] data, int start, int len) { K3!|k(jt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K>w}(td
} \02j~r`o
} 9IN=m 5
} Ajs<a(,6
} NnGQ=$e
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堆排序： hy3[MOD$G
C W7E2 ^P$
package org.rut.util.algorithm.support; FWq6e,
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import org.rut.util.algorithm.SortUtil; }8fxCW*|
3!Rb{
/** 0A9x9l9Wd
* @author treeroot 3k5Mty
* @since 2006-2-2 G0^23j
* @version 1.0 mhnD1}9,Ih
*/ 9K Ih}Q@P
public class HeapSort implements SortUtil.Sort{ de[c3!#1d
|t4k&Dkx`
/* (non-Javadoc) ~ifq_Ag.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #- z*c
*/ fP&F$"o8
public void sort(int[] data) { slOki|p;
MaxHeap h=new MaxHeap(); "5synfO
h.init(data); f8lBxK
for(int i=0;i h.remove(); \-#~)LB]M
System.arraycopy(h.queue,1,data,0,data.length); $io-<Z#Q
} y~SFlv36
^ B=x-G.
private static class MaxHeap{ Q7N4@w;e
G"5Nj3vd
void init(int[] data){ F$ZWQ9&5U0
this.queue=new int[data.length+1]; mkk74NY
for(int i=0;i queue[++size]=data; XG<^j}H{}
fixUp(size); f0IljY!.
} Jk}L+Xvv
} e%R+IH5i
2^ ^;Q:
private int size=0; 5y(irbk7
k{s#wJA
private int[] queue; ]n _-
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public int get() { ^n@iCr9
return queue[1]; <^~Xnstl
} d;mQ=k 1
_a+0LTo".
public void remove() { Eh!%NeO
SortUtil.swap(queue,1,size--); j /)cdP
fixDown(1); CBnD)1b\
} l YH={jJ
file://fixdown !Ya +
private void fixDown(int k) { Kp~k!6x
int j; +(/XMx}a
while ((j = k << 1) <= size) { vEtogkFA"
if (j < size %26amp;%26amp; queue[j] j++; %b\xRt[0v7
if (queue[k]>queue[j]) file://不用交换 K[~Wj8W0
break; <j:3<''o
SortUtil.swap(queue,j,k); }td+F&l($V
k = j; s.=)p"pTd
} {)4Vv`n
} AA>5h<NM
private void fixUp(int k) { uqTOEHH7
while (k > 1) { {@Diig
int j = k >> 1; 7 aDI6G
if (queue[j]>queue[k]) nXi6Q+YI
break; j"94hWb
SortUtil.swap(queue,j,k); j@GMZz<
k = j; ;jX_e(T3m
} :vurU$\
} `c:'il?
Ic#+*W\ZW
} \RQ5$!O
M8KfC!
} hXz"}X n
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SortUtil： Ql&P1|&
h@{@OAu?
package org.rut.util.algorithm; ^jf$V#z0/
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import org.rut.util.algorithm.support.BubbleSort; nJ*NI)
import org.rut.util.algorithm.support.HeapSort; {E6W]Mno
import org.rut.util.algorithm.support.ImprovedMergeSort; JiI(?I
import org.rut.util.algorithm.support.ImprovedQuickSort; GExG1n-
import org.rut.util.algorithm.support.InsertSort; UwE^ij
import org.rut.util.algorithm.support.MergeSort; #:s'&.6
import org.rut.util.algorithm.support.QuickSort; HowlJ[km%
import org.rut.util.algorithm.support.SelectionSort; l\$C)q6O
import org.rut.util.algorithm.support.ShellSort; ~-W.yg6D{
SCGQo.~,
/** ;H:qDBH
* @author treeroot R`1$z8$
* @since 2006-2-2 f_Wn[I{
* @version 1.0 lPFMNRt~8
*/ jU4Ir{f
public class SortUtil { 29av8eW?3
public final static int INSERT = 1; Z<&: W8n
public final static int BUBBLE = 2; :"QRB#EC%
public final static int SELECTION = 3; X='4N<
public final static int SHELL = 4; )9<)mV*EB(
public final static int QUICK = 5; <n6/np!
public final static int IMPROVED_QUICK = 6; xUSIck
public final static int MERGE = 7; UI!EIZ*~
public final static int IMPROVED_MERGE = 8; Mm/GIa
public final static int HEAP = 9; 7s.sbP~
Pc4sReo'
public static void sort(int[] data) { 0f-gQD
sort(data, IMPROVED_QUICK); D~mGv1t"
} =%]dk=n?TN
private static String[] name={ w6wXe_N+M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lcUL7
}; nZ%<2
wwpvmb
private static Sort[] impl=new Sort[]{ qY0Ic5wCY
new InsertSort(), +:Y6O'h.
new BubbleSort(), :^ cA\2=
new SelectionSort(), N86Hn]#
new ShellSort(), 3b[_0
new QuickSort(), Z>X-ueV
new ImprovedQuickSort(), >G-D& A+
new MergeSort(), Fe/*U4xU
new ImprovedMergeSort(), IGbQ L
new HeapSort() &j>`H:
}; /#Xz+#SqY
@|cas|U.r
public static String toString(int algorithm){ +Uk/Zg w^
return name[algorithm-1]; #cmj?y()
} a2g15;kM
=UYc~VUYnT
public static void sort(int[] data, int algorithm) { E8V,".!+E
impl[algorithm-1].sort(data); QzV:^!0J
} $:<KG&Br
\.*aC)
public static interface Sort { aIm\tPbb
public void sort(int[] data); p oNQ<ijK
} ikofJl]9
^WVr@6
public static void swap(int[] data, int i, int j) { evn ]n
int temp = data; v4 c_UFEh<
data = data[j]; eR;cl$
data[j] = temp; .=K@M"5&
} O-mP{
} paiF ah