[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; rx1u*L
} D_DwP$wSo
int i1=l; ub-3/T
int i2=mid+1; &zdS9e-fF
for(int cur=l;cur<=r;cur++){ ""0Y^M2I
if(i1==mid+1) q!y.cyL
data[cur]=temp[i2++]; mgAjD.
else if(i2>r) P}v ;d]
data[cur]=temp[i1++]; u2 s
else if(temp[i1] data[cur]=temp[i1++]; pAE (i7
else yV(#z2|
data[cur]=temp[i2++]; ]F4QZV( M
} ,|:.0g[n
} gwoe1:F:J
*#T: _
} k83K2>]
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改进后的归并排序: j=l2\W#}
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package org.rut.util.algorithm.support; Vp/XVyL}R
i%K6<1R;y{
import org.rut.util.algorithm.SortUtil; IzpE|8l
EZ)b E9
/** .xJ54Vz
* @author treeroot K%v:giN$l`
* @since 2006-2-2 o08WC'bX
* @version 1.0 ^wIB;!W
*/ n/_q
public class ImprovedMergeSort implements SortUtil.Sort { L 4j#0I]lq
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private static final int THRESHOLD = 10; ~T_|?lU`R
z9aR/:W}
/* |]?f6^|4
* (non-Javadoc) F1#{(uW
* T+Z[&|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J4T"O<i$58
*/ (U:-z=E#1
public void sort(int[] data) { cRLw)"|
int[] temp=new int[data.length]; t*IePz]/
mergeSort(data,temp,0,data.length-1); Lh[0B.g<
} u cpU$+
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private void mergeSort(int[] data, int[] temp, int l, int r) { os/h~,=
int i, j, k; & FhJ%JK
int mid = (l + r) / 2; ^Ps!
if (l == r) >+M[!;m}
return; ${Un#]g
if ((mid - l) >= THRESHOLD) xt^1,V4Ei~
mergeSort(data, temp, l, mid); ?Q"andf
else 6$urrSQ`N0
insertSort(data, l, mid - l + 1); nwFBuP<LR
if ((r - mid) > THRESHOLD) MQoA\
mergeSort(data, temp, mid + 1, r); qp})4XTv
else &-=~8
insertSort(data, mid + 1, r - mid); g *Js4
Cbff:IP
for (i = l; i <= mid; i++) { oco,sxT
temp = data; z!g$#hmL>
} mw"FQ?bJ
for (j = 1; j <= r - mid; j++) { pJHdY)Cz
temp[r - j + 1] = data[j + mid]; UIAazDyC
} vbid>$%
int a = temp[l]; XoKgs,y4
int b = temp[r]; :h(HKMSk1
for (i = l, j = r, k = l; k <= r; k++) { ?X|)0o
if (a < b) { [MIgQ.n
data[k] = temp[i++]; ~B;}jI]d[
a = temp; PuNL%D
} else { X:W\EeH
data[k] = temp[j--]; t\Vng0
b = temp[j]; )E9!m
} 2.v{W-D[
} v9f+ {Y%-
} jEBn"]\D
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/** q;eb
* @param data #/YS
* @param l kLgkUck8]
* @param i apL$`{>US
*/ aO1^>hy
private void insertSort(int[] data, int start, int len) { =Y2 Rht
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lh;fqn`
} K#OL/2^ 5
} FyEKqYl
} 1/-3m Po
} m9[ 7"I
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堆排序： ,WyEwc]
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package org.rut.util.algorithm.support; '4'Z
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import org.rut.util.algorithm.SortUtil; yJ?=##
p"0#G&-
/** 1 uU$V =
* @author treeroot ?Bu*%+
* @since 2006-2-2 +R*DE5dz
* @version 1.0 DtANb^
*/ !<];N0nt#
public class HeapSort implements SortUtil.Sort{ %+'Ex]B
{"]!zL
/* (non-Javadoc) 2^'Ec:|f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ys`-QlkB
*/ D\Ez~.H
public void sort(int[] data) { tX^6R
MaxHeap h=new MaxHeap(); ]aPf-O*
h.init(data); do8[wej<:
for(int i=0;i h.remove(); ](JrEg$K
System.arraycopy(h.queue,1,data,0,data.length); 6_`Bo%
} f/Y&)#g>k
[5&k{*}}
private static class MaxHeap{ =`+D/ W\[Y
%,[,mW4l
void init(int[] data){ eA& #33
this.queue=new int[data.length+1]; ta?NO{*
for(int i=0;i queue[++size]=data; 9dNB_
fixUp(size); ,b5'<3\
} t'2A)S
} $#rkvG_w
qm=U<'b^
private int size=0; h3`}{ w
,>B11Z}PH
private int[] queue; Z )c\B
|^1g*fy?
public int get() { fTj@/"a
return queue[1]; gXI-{R7Me
} d[6 'w ?
cX9o'e:C
public void remove() { Tx}Nr^
SortUtil.swap(queue,1,size--); JMB#KzvN[
fixDown(1); XZ%[;[
} 1'f_C<.0
file://fixdown |:C0_`M9
private void fixDown(int k) { s)WA9PiC
int j; ~\am%r>
while ((j = k << 1) <= size) { CU|E-XPW
if (j < size %26amp;%26amp; queue[j] j++; V0^{Ss1M
if (queue[k]>queue[j]) file://不用交换 C+'-TLeu
break; %Yu~56c-
SortUtil.swap(queue,j,k); (7qlp*8.s
k = j; nXn@|J&z~U
} 3(oMASf
} AFi_P\X
private void fixUp(int k) { i(%2t(wf+
while (k > 1) { 1 *' /B
int j = k >> 1; g|Lbe4?
if (queue[j]>queue[k]) bll[E}E|3
break; *)RKU),3nL
SortUtil.swap(queue,j,k); >N#Nz 0|(
k = j; g**!'T4&o
} MFROAVPZ5
} #e@NV4q
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} _;3,
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} zr!7*, p
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SortUtil： yBy7d!@2
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package org.rut.util.algorithm; {m*lt3$k
bD{tsxm[9
import org.rut.util.algorithm.support.BubbleSort; q0}u%Yz
import org.rut.util.algorithm.support.HeapSort; b>ZAkz)U+
import org.rut.util.algorithm.support.ImprovedMergeSort; V.{HMeE4
import org.rut.util.algorithm.support.ImprovedQuickSort; w1I07 (
import org.rut.util.algorithm.support.InsertSort; FO/cEu
import org.rut.util.algorithm.support.MergeSort; lo!pslqsn
import org.rut.util.algorithm.support.QuickSort; [yMSCCswW
import org.rut.util.algorithm.support.SelectionSort; KKsVZ~<6u
import org.rut.util.algorithm.support.ShellSort; ^N^G?{EV/#
MiZ<v/L2
/** ow'G&<0b
* @author treeroot HrE,K\^
* @since 2006-2-2 )n)AmNpq
* @version 1.0 X{x(p
*/ S*<Jy(:n
public class SortUtil { ou-#+Sdd
public final static int INSERT = 1; ,marNG
public final static int BUBBLE = 2; ZP~H!
public final static int SELECTION = 3; ZV--d'YiEm
public final static int SHELL = 4; sgOau\E
public final static int QUICK = 5; E#_/#J]UQn
public final static int IMPROVED_QUICK = 6; no8\Oees
public final static int MERGE = 7; "_&ZRcd*
public final static int IMPROVED_MERGE = 8; Y$>NsgQn6
public final static int HEAP = 9; /Pextj<
E0I/]0
public static void sort(int[] data) { _]@u)$
sort(data, IMPROVED_QUICK); $,K@xq5
} DY#195H
private static String[] name={ w4P;Z-Cd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I8! .n
}; GZi`jp
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private static Sort[] impl=new Sort[]{ @2T8H
new InsertSort(), }vh <x6
new BubbleSort(), _FOIMjh%N
new SelectionSort(), H<|}pZ
new ShellSort(), (-$5YKm
new QuickSort(), bVz<8b6h'-
new ImprovedQuickSort(), +c/!R|h=S
new MergeSort(), &wlD`0v
new ImprovedMergeSort(), G2N0'R"
new HeapSort() a+HK fK
}; kxKb}>=
6:wk=#w
public static String toString(int algorithm){ >TglX t+
return name[algorithm-1]; K&&T:'=/
} .tKBmq0xo"
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public static void sort(int[] data, int algorithm) { hY!ek;/Gc
impl[algorithm-1].sort(data); :rM2G@{
} `^#4okg]
<lR:^M[v5<
public static interface Sort { Zj -#"Gm
public void sort(int[] data); 9n is8
} 'Z#_"s#L
J-/w{T8:
public static void swap(int[] data, int i, int j) { pq r_{
int temp = data; ,vLQx\m{
data = data[j]; U\Y0v.11
data[j] = temp; ~S<aIk0l
} ?,x\46]>_K
} Yr"Of*VNH