[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; ]MmFtdvE
} x,j%3/J^2
int i1=l; 3S=$ng
int i2=mid+1; dthtWnB@
for(int cur=l;cur<=r;cur++){ 's\rQ-TV
if(i1==mid+1) :2*0Jh3_
data[cur]=temp[i2++]; @>q4hYF
else if(i2>r) -_^#7]
data[cur]=temp[i1++]; qE*hUzA
else if(temp[i1] data[cur]=temp[i1++]; "BA&
else 1deK}5'
data[cur]=temp[i2++]; [5;_XMj%
} Pah*,
} /:ju/~R}
qS/ 'Kyp_
} 4Dw| I${O
k[a5D/b
改进后的归并排序: sp7#e%R\
b>@fHmpwD
package org.rut.util.algorithm.support; ZfU &X{
x }.&?m
import org.rut.util.algorithm.SortUtil; Ch'e'EmI
Zfc{}ius
/** !N74y%=M
* @author treeroot #SR )tU
* @since 2006-2-2 l<UA0*t
* @version 1.0 4bq+(CI6
*/ \F9HsR6
public class ImprovedMergeSort implements SortUtil.Sort { 6g)X&pZ
j)mi~i*U
private static final int THRESHOLD = 10; ?OBB)hj
0~Iq9}{*P
/* ,veo/k<"r8
* (non-Javadoc) 1[]V @P^
* ]T>|Y0|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c|F26$rv
*/ {4B7a6
public void sort(int[] data) { ')Qb,#/,%
int[] temp=new int[data.length]; 7,3 g{8
mergeSort(data,temp,0,data.length-1); A",Xn/d
} JpZ3T~Wrf
tN_~zP
private void mergeSort(int[] data, int[] temp, int l, int r) { "u3 N9
int i, j, k; M5`wfF,j
int mid = (l + r) / 2; v%)=!T,
if (l == r) 2#Y5*r's\
return; ]D@y""{--s
if ((mid - l) >= THRESHOLD) J@RV^2
mergeSort(data, temp, l, mid); ?MD\\gN
else uWkuw5;
insertSort(data, l, mid - l + 1); "9OOyeKu%
if ((r - mid) > THRESHOLD) v03^
mergeSort(data, temp, mid + 1, r); ;5:3 =F>ao
else ksV^Y=]
insertSort(data, mid + 1, r - mid); t]6 4=
)%bY2 pk
for (i = l; i <= mid; i++) { U(\ ^!S1
temp = data; kYu"`_n}
} v;:. k,E0
for (j = 1; j <= r - mid; j++) { tRXR/;3O
temp[r - j + 1] = data[j + mid]; 2l}3L
} 0c]3 ,#
int a = temp[l]; $Hal]
int b = temp[r]; 24I~{Qy
for (i = l, j = r, k = l; k <= r; k++) { yG:Pg MrB
if (a < b) { "FXT8Qxg
data[k] = temp[i++]; '_%`0p1
a = temp; =%0r_#F%=
} else { X`0`A2 n
data[k] = temp[j--]; ktiC*|fd
b = temp[j]; J72YZrc
} o%l|16DR
} ^w~Utx4
} ;mXw4_{
$jN,]N~
/** t**o<p#)f
* @param data 3k* U/*
* @param l FQw@@
* @param i !;.nL-NQ
*/ xmwH~UWp
private void insertSort(int[] data, int start, int len) { IfpFsq:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K ZQ `
} u =|A
} fMIKA72>{
} r8vF I6J
} bS*oFm@u
/;xmM2B'
堆排序： T^.W'
`YPNVm<3)
package org.rut.util.algorithm.support; =xPBolxm5U
Y 9~z7
import org.rut.util.algorithm.SortUtil; usOIbrQ
>@StKj
/** X]v.Yk=wu
* @author treeroot k?ksv+e\
* @since 2006-2-2 KHt.g`1:R
* @version 1.0 `+EjmY
*/ pYaq1_<+
public class HeapSort implements SortUtil.Sort{ YJ~3eZQ
7VKTI:5y
/* (non-Javadoc) Oz7WtN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H8?Kgaj~vf
*/ ccJ!N
public void sort(int[] data) { y3pr(w9A
MaxHeap h=new MaxHeap(); .RxAYf|
h.init(data); Zn"1qLPF
for(int i=0;i h.remove(); \!,qXfTMB
System.arraycopy(h.queue,1,data,0,data.length); |k=L&vs
} @Xq3>KJ_)H
/WE1afe_R
private static class MaxHeap{ l} UOg
K;#9: Z^+
void init(int[] data){ XV*uu "F
this.queue=new int[data.length+1]; tS&rR0<OW
for(int i=0;i queue[++size]=data; 4O'X+dv^I
fixUp(size); Dl95Vo=1
} \D,c*I|p7
} d`&F
,MdK "Qa>
private int size=0; ET}Dh3A
4^Ghn
private int[] queue; :s`\jJ
}dO^q-t$3
public int get() { 9?#L/
return queue[1]; K\`>'C2_V
} J\x.:=V
WZJ}HHePr
public void remove() { -VlXZj@u+
SortUtil.swap(queue,1,size--); isR|K9qf^
fixDown(1); '{xPdN
} $E]WU?U
file://fixdown 7iBN!"G0
private void fixDown(int k) { p@+r&Mg%W"
int j; a'2^kds
while ((j = k << 1) <= size) { CN, oH4IU
if (j < size %26amp;%26amp; queue[j] j++; ]:vo"{*C
if (queue[k]>queue[j]) file://不用交换 V_Oj?MMpn
break; >gFEA0-
SortUtil.swap(queue,j,k); =g+Rk+jn
k = j; "iY=1F"\R
} qg#|1J6e
} ~kW[d1'c
private void fixUp(int k) { +>wBGVvS
while (k > 1) { e4/Y/:vFO
int j = k >> 1; 5T4!'4n
if (queue[j]>queue[k]) ET 2@dY~
break; {`M 'ruy.%
SortUtil.swap(queue,j,k); !*@sX7H
k = j; xf]_@T;
} a@&P\"k
} 8e3I@mv
-r!sY+Z>
} 8Cw+<A*
U%nLo[k
} u+Q<>>lU
6@[7
SortUtil： lboi\GP|
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package org.rut.util.algorithm; V O= o)H\
rr=e
import org.rut.util.algorithm.support.BubbleSort; pZg}7F{$
import org.rut.util.algorithm.support.HeapSort; -@EAL:kY
import org.rut.util.algorithm.support.ImprovedMergeSort; >MeM
import org.rut.util.algorithm.support.ImprovedQuickSort; n6Qsug$z
import org.rut.util.algorithm.support.InsertSort; lmRdl>
import org.rut.util.algorithm.support.MergeSort; GnzKDDH '
import org.rut.util.algorithm.support.QuickSort; ')mR87
import org.rut.util.algorithm.support.SelectionSort; jA}b=c
import org.rut.util.algorithm.support.ShellSort; U2D2?#
V"`t*m$
/** c/Ykk7T9--
* @author treeroot 2)zAX"#/
* @since 2006-2-2 C>:'@o Z
* @version 1.0 b,Vg3BS
*/ }[gk9uM_7
public class SortUtil { ecRY,MN
public final static int INSERT = 1; U'(@?]2<G
public final static int BUBBLE = 2; "$Mz>]3&q
public final static int SELECTION = 3; Z.DO 2=+=
public final static int SHELL = 4; TppuEC>
public final static int QUICK = 5; fT.GYvt`
public final static int IMPROVED_QUICK = 6; ]'iOV-2^'
public final static int MERGE = 7; p2/Pj)2
public final static int IMPROVED_MERGE = 8; y]e[fZ`L
public final static int HEAP = 9; ZcLW8L
WQ1~9#
public static void sort(int[] data) { muJR~4
sort(data, IMPROVED_QUICK); 88l\8k4r
} RMvq\J}w!
private static String[] name={ 2`;&Uwt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C@3`n;yZ=
}; F?B`rw@xr
Qmg2lP.)
private static Sort[] impl=new Sort[]{ t) :'XGk@
new InsertSort(), il5Qo
new BubbleSort(), DQy<!Wb+
new SelectionSort(), bk}'wcX<+]
new ShellSort(), p9`!.~[
new QuickSort(), t3// U#
new ImprovedQuickSort(), ;n~-z5)
new MergeSort(), [ u.r]\[J
new ImprovedMergeSort(), x[_SNX"
new HeapSort() O;dtz\
}; 'fIoN%
f~0CpB*X
public static String toString(int algorithm){ # zbAA<f
return name[algorithm-1]; Ap<kK0#h
} ZZu{ct9
OkV*,n
public static void sort(int[] data, int algorithm) { 3Hd~mfO\
impl[algorithm-1].sort(data); &{uj3s&C
} nign"r
45aUz@
public static interface Sort { \QvoL
public void sort(int[] data); wJ%;\06
} {)?:d6"
Z.l4<
public static void swap(int[] data, int i, int j) { S<Os\/*
int temp = data; w$##GM=Tq
data = data[j]; A 6IrA/b
data[j] = temp; bQlvb
} g]Jt (aYK
} ?-Zl(uX