[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; at1oxmy
} hf;S#.k
int i1=l; +RnWeBXAT
int i2=mid+1; ?8;WP&
for(int cur=l;cur<=r;cur++){ <;cch6Z
if(i1==mid+1) N,:G5WxW
data[cur]=temp[i2++]; Dn#UcMO>W
else if(i2>r) b`f6(6
data[cur]=temp[i1++]; PfGiJ]:V-u
else if(temp[i1] data[cur]=temp[i1++]; !sYZ1;WAO
else :z6?
data[cur]=temp[i2++]; 6o*'Q8h
} U/xzl4m6
} MPYYTQ1FB
_xnJfW_
} >ul&x!?@
6X$nZM|g,
改进后的归并排序: +>yspOEz
fuWAw^&
package org.rut.util.algorithm.support; vFeR)Ox's
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import org.rut.util.algorithm.SortUtil; ;alt%:$n
KIKIag#
/** ^==Tv+T9U
* @author treeroot 'z@]hm#
* @since 2006-2-2 -lXQQ#V -
* @version 1.0 C'jCIL
*/ CIRMAX
public class ImprovedMergeSort implements SortUtil.Sort { f 0~Z@\
7e D` is
private static final int THRESHOLD = 10; w7\vrS>&
e)3Mg^
/* J?tnS6V
* (non-Javadoc) 6="o&!
* k0TQFx.A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fG{3S:TQq
*/ .k#O[^~]
public void sort(int[] data) { dF|R`Pa2ML
int[] temp=new int[data.length]; 1f?Fuw
mergeSort(data,temp,0,data.length-1); uzLm TmM+
} `m$,8f%j6_
JIc9csr:b
private void mergeSort(int[] data, int[] temp, int l, int r) { @]42.oP
int i, j, k; 8:uh0
int mid = (l + r) / 2; :_+U[k(#
if (l == r) K9K.mGYc
return; m |.0$+=
if ((mid - l) >= THRESHOLD) ISTAJ8" D
mergeSort(data, temp, l, mid); u;b6uE
else +aqQa~}r
insertSort(data, l, mid - l + 1); [$fB]7A
if ((r - mid) > THRESHOLD) =PnNett}a
mergeSort(data, temp, mid + 1, r); !~j9Oc^
else {96NtR0Z
insertSort(data, mid + 1, r - mid); Zjs,R{
]{I>HA5[
for (i = l; i <= mid; i++) { y{XNB}E
temp = data; *$/Go8t4u
} ucbtPTFYvr
for (j = 1; j <= r - mid; j++) { 8 -w|~y';
temp[r - j + 1] = data[j + mid]; *Tmqs@L
} FRQkD%k
int a = temp[l]; .mOm@<Xdg
int b = temp[r]; Oo ^AE
for (i = l, j = r, k = l; k <= r; k++) { !A14\
if (a < b) { 1k"i"kRM
data[k] = temp[i++]; vi[~Qt
a = temp; B =DV!oUg
} else { pTJ_DH
data[k] = temp[j--]; )5Cqyp~P
b = temp[j]; >z,Y%A
} &?gcnMg$,J
} R/2L9Lcv
} HD,6
#}8VUbJ
/** OSom-?|w
* @param data P8tCzjrV
* @param l $-E<{
* @param i "'>fTk_
*/ r8A'8g4cM
private void insertSort(int[] data, int start, int len) { !u`f?=s;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O_5;?$[m
} e0#{'_C
} @#9xSs#
} tao9icl*`
} :MH=6
kjSzuqB
堆排序： -7EwZRS@9
77 ?TRC
package org.rut.util.algorithm.support; sr~VvciIy
% 5BSXAc
import org.rut.util.algorithm.SortUtil; C3 m_sv#e
Gr3 q
/** DG3Mcf@5
* @author treeroot ADMeOdgca
* @since 2006-2-2 Q0Gfwl
* @version 1.0 HS1{4/
*/ jank<Q&w
public class HeapSort implements SortUtil.Sort{ j\.e6&5%SS
^Je*k)COn
/* (non-Javadoc) :rvBx"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -{yG+1
*/ T{BGg
public void sort(int[] data) { 0+A#k7c6p
MaxHeap h=new MaxHeap(); ZV07;`I
h.init(data); za8+=?
for(int i=0;i h.remove(); S:c lyx
System.arraycopy(h.queue,1,data,0,data.length); )EN,Ry
} 9Lqz:4}
`EiL~*
private static class MaxHeap{ LBcqFvj{&
%Wc$S]>i
void init(int[] data){ #4Cf-$J
this.queue=new int[data.length+1]; {|e7^_ke
for(int i=0;i queue[++size]=data; E/E|*6R
fixUp(size); &(20*Vn,O
} UG<<.1JL
} WkoYkkuzj
pU u')y
private int size=0; >Q)S-4iR
g G|4+' t
private int[] queue; 4&~*;an7
YIYuqtnSJ
public int get() { >EgMtZ88.<
return queue[1]; W7IAW7w8U
} rE\&FVx
b_@bS<wsF}
public void remove() { F<,"{L
SortUtil.swap(queue,1,size--); g#5t8w
fixDown(1); I;mc:@R<
} Ej`G(
file://fixdown fqol-{F.V
private void fixDown(int k) { {_4zm&
int j; o7AI
while ((j = k << 1) <= size) { !,*Uvs@b
if (j < size %26amp;%26amp; queue[j] j++; 2}ywNVS
if (queue[k]>queue[j]) file://不用交换 L_>LxF43
break; McvLU+
SortUtil.swap(queue,j,k); ay28%[Q b4
k = j; JOki4N
} <Oj'0NK-
} ?j} Fxr
private void fixUp(int k) { oMN Qv%U
while (k > 1) { az Oib=3fz
int j = k >> 1; 'EkjySZ]F{
if (queue[j]>queue[k]) X|60W
break; <|:$_&(
SortUtil.swap(queue,j,k); `iwGPG!
k = j; cty
} dwm>!h
} `h1>rP
NbUibxJ
} eZ(o_
{.UK{nA?sm
} |%=c<z+8
m9aP]I3g]\
SortUtil： .r-kH&)"GU
}cg 1CT5
package org.rut.util.algorithm; U[!wu]HMF
Zg >!5{T
import org.rut.util.algorithm.support.BubbleSort; g^:7mG6C
import org.rut.util.algorithm.support.HeapSort; o(xt%'L`t
import org.rut.util.algorithm.support.ImprovedMergeSort; Ly6) ,[q~
import org.rut.util.algorithm.support.ImprovedQuickSort; _Tma1~Gq
import org.rut.util.algorithm.support.InsertSort; 0O?!fd n
import org.rut.util.algorithm.support.MergeSort; bj 0-72V
import org.rut.util.algorithm.support.QuickSort; W-vEh
import org.rut.util.algorithm.support.SelectionSort; X""}]@B9z
import org.rut.util.algorithm.support.ShellSort; 6^nxw>-
4n.EA,:g:(
/** Qexv_:C
* @author treeroot cA+O]",}
* @since 2006-2-2 m pM,&7}
* @version 1.0 iIg99c7/&9
*/ ?yvjX90
public class SortUtil { cX48?srG
public final static int INSERT = 1; [2zS@p
public final static int BUBBLE = 2; =]sM,E,n
public final static int SELECTION = 3; 4)d#dy::\
public final static int SHELL = 4; w;T?m,"
public final static int QUICK = 5; ~ponYc.Y
public final static int IMPROVED_QUICK = 6; K_BF=C.k
public final static int MERGE = 7; {`[u XH?3d
public final static int IMPROVED_MERGE = 8; z)pp{
public final static int HEAP = 9; rh(77x1|(G
ZRoOdo94
public static void sort(int[] data) { AW`+lE'?
sort(data, IMPROVED_QUICK); 1;[ZkRbzL
} 4m/L5W:K
private static String[] name={ X1lL@`r.5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u_ym=N57`
}; -r6LndQs
%|By ?i
private static Sort[] impl=new Sort[]{ WR4\dsgCU
new InsertSort(), #pp6 ycy
new BubbleSort(), =tfS@o/n
new SelectionSort(), `T$CUlt6
new ShellSort(), 4031~A8
new QuickSort(), mybjcsV4
new ImprovedQuickSort(), ZCCwx71j
new MergeSort(), FtxmCIVIV~
new ImprovedMergeSort(), bA3pDt).p
new HeapSort() gA:N>w&<X
}; Twr<MXa
~,P."
public static String toString(int algorithm){ 5TcirVO82
return name[algorithm-1]; +J%9%DqF
} Klk[h
Fu#mMn0c
public static void sort(int[] data, int algorithm) { $~2qEe.h
impl[algorithm-1].sort(data); ai(J%"D"
} _#6ekl|%
Y,C3E>}Dq
public static interface Sort { !l1ycQM
public void sort(int[] data); 9\W }p\c
} a$'=a09
Wq]Lb:&{a
public static void swap(int[] data, int i, int j) { M}tr*L
int temp = data; [#6Eax,j
data = data[j]; `SO"F,
data[j] = temp; A!j6JY.w
} I^fKZ^]8P
} QBfsdu<@^