[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; B-EDVMu
} $|!@$Aj
int i1=l; 7& G#&d
int i2=mid+1; [5s4Jp$+
for(int cur=l;cur<=r;cur++){ y@u,Mv
if(i1==mid+1) >Gi*BB
data[cur]=temp[i2++]; n*vhCeL
else if(i2>r) K6@9=_A
data[cur]=temp[i1++]; !ZTBiC5R
else if(temp[i1] data[cur]=temp[i1++]; 2W vf[2Xw
else X,i^OM_
data[cur]=temp[i2++]; zUd{9B$
} _t;Mi/\P
} W)m\q}]FYz
WxI_wRKx
} _q1E4z
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改进后的归并排序: |GnqfD
2]f?c%)I
package org.rut.util.algorithm.support; Pvu*Y0_p
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import org.rut.util.algorithm.SortUtil; n>:|K0u"
dSw%Qv*y
/** :x/L.Bz
* @author treeroot (SGU]@)g
* @since 2006-2-2 y9)Rl)7-:
* @version 1.0 x^P~+(g
*/ %SlF7$
public class ImprovedMergeSort implements SortUtil.Sort { 7\sRf/
`u7"s'
private static final int THRESHOLD = 10; 15tT%TC
@Zov&01
/* $@Fvl-lK
* (non-Javadoc) }qn@8}
* .cA'6J"Bm\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ed=]RR4R
*/ yi$Jk}w
public void sort(int[] data) { La#otuw+?
int[] temp=new int[data.length]; -P'KpX:]hd
mergeSort(data,temp,0,data.length-1); l&LrcM
} yCLDJ%8
'2BE"e
private void mergeSort(int[] data, int[] temp, int l, int r) { Zbobi,
int i, j, k; 22gk1'~dO
int mid = (l + r) / 2; >qhoGg
if (l == r) 7G<v<&
return; 3iC$ "9!p
if ((mid - l) >= THRESHOLD) c[QXc9
mergeSort(data, temp, l, mid); 2N$yn
else -p\uW0XA
insertSort(data, l, mid - l + 1); E |BE(F;K
if ((r - mid) > THRESHOLD) v;m}<3@'
mergeSort(data, temp, mid + 1, r); BQTibd
else GIGC,zP@k
insertSort(data, mid + 1, r - mid); /9..hEq^
8kwe._&)
for (i = l; i <= mid; i++) { cun&'JOH?U
temp = data; lE@ V>%b
} IxQ(g#sj_k
for (j = 1; j <= r - mid; j++) { .3JLa8y
temp[r - j + 1] = data[j + mid]; !uwZ%Uxz
} 4Y#F"+m.]
int a = temp[l]; eVy>
int b = temp[r]; ,|r%tNh<8$
for (i = l, j = r, k = l; k <= r; k++) { f8c'`$O
if (a < b) { R&`; C<6}D
data[k] = temp[i++]; 5i42o+'
a = temp; YAoGVey
} else { /\0rRT
data[k] = temp[j--]; l#;DO9
b = temp[j]; XzBnj7E
} c'8pTP%[
} 9AgTrP
} v.Y?<=E+<d
--}5%6
/** 2Vn~o_ga
* @param data >ARZ=x[
* @param l x #Um`
* @param i 4%s6 d,6"
*/ (WISf}[l;
private void insertSort(int[] data, int start, int len) { AJ0 ;wx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ..5rW0lr
} % >\v6ea
} WX9ABh&5
} t(RJc
} @*VfG CQ(
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堆排序： 2`?58&
Uf ?._&:
package org.rut.util.algorithm.support; EL?6x
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import org.rut.util.algorithm.SortUtil; +p Y*BP+~i
5>e#SW
/** oieJ7\h]m
* @author treeroot 7%Q?BH7{
* @since 2006-2-2 m 3Y@p$i5
* @version 1.0 O_kBAC-|R(
*/ '=Z]mi/aw
public class HeapSort implements SortUtil.Sort{ 9[5qN!P;y
[@&0@/s*t'
/* (non-Javadoc) L^{1dVGWNa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5!b+^UR;z
*/ +'ZJ]
public void sort(int[] data) { V8Fp1?E9S
MaxHeap h=new MaxHeap(); YcaomPo
h.init(data); U $2"ZyFii
for(int i=0;i h.remove(); hp$/O4fD
System.arraycopy(h.queue,1,data,0,data.length); Hrk]6*
} FoNkISzW
b5@sG^
private static class MaxHeap{ &qjc+-r{l
wigs1
void init(int[] data){ RnaxRnXVR
this.queue=new int[data.length+1]; !<8-juY
for(int i=0;i queue[++size]=data; 0|J]EsPxu
fixUp(size); V4`
} c;13V(Djy
} t4P`#,:8
H:k?#7D(
private int size=0; ^7Hwpn7E
b4R;#rm
private int[] queue; Z0'&@P$
<3)k M&.B
public int get() { s;ivoGe}
return queue[1]; =.48^$LWx
} E-`3}"{
P2!+ZJ&
public void remove() { "M!]t,?S
SortUtil.swap(queue,1,size--); m}$7d5
fixDown(1); 3!u`PIQv
} 0z =?}xr
file://fixdown 81}JX
private void fixDown(int k) { euyd(y$'k
int j; `w_%HVw>"
while ((j = k << 1) <= size) { GiK4LJ~cH)
if (j < size %26amp;%26amp; queue[j] j++; RD|DHio%
if (queue[k]>queue[j]) file://不用交换 o}p^q:T*
break; \:m1{+l
SortUtil.swap(queue,j,k); *8I"7'xh
k = j; 5<>"d :9
} z}a9%Fb
} U!\~LKfA
private void fixUp(int k) { kj>!&W57
while (k > 1) { X=KC+1e
int j = k >> 1; &~aS24c
if (queue[j]>queue[k]) #I"s{*
break; Q@ Ze+IhK`
SortUtil.swap(queue,j,k); aJ"m`5]=%
k = j; Fy$f`w_H@
} 6dncUfB
} f}t8V% ^E
bP Q=88*
} vB%os Qm
ictV7)
} Z0[d;m*
4:9N]1JCb
SortUtil： I<rT\':9
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package org.rut.util.algorithm; Y:R*AOx
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import org.rut.util.algorithm.support.BubbleSort; !pZ<{|cH
import org.rut.util.algorithm.support.HeapSort; w,az{\
import org.rut.util.algorithm.support.ImprovedMergeSort; Yi j^hs@eV
import org.rut.util.algorithm.support.ImprovedQuickSort; 3yrb7Rn3
import org.rut.util.algorithm.support.InsertSort; P-/"sD
import org.rut.util.algorithm.support.MergeSort; s1]m^,
import org.rut.util.algorithm.support.QuickSort; ,`bmue5
import org.rut.util.algorithm.support.SelectionSort; K3iQ/j~aq
import org.rut.util.algorithm.support.ShellSort; ^ -4~pDv^
Za,myuI+
/** MD^,"!A
* @author treeroot U=WS]
* @since 2006-2-2 %:v<&^oDlm
* @version 1.0 ` {qt4zd0
*/ 9:*[Q"v
public class SortUtil { edo+ o{^
public final static int INSERT = 1; 8iTB
public final static int BUBBLE = 2; S Rk%BJ? ~
public final static int SELECTION = 3; BwkY;Ur/AL
public final static int SHELL = 4; N%?R(
public final static int QUICK = 5; pMJm@f
public final static int IMPROVED_QUICK = 6; c5_/i7
public final static int MERGE = 7; /xSFW7d1
public final static int IMPROVED_MERGE = 8; 2qot(Zs1i
public final static int HEAP = 9; /J(vqYK"
F{4v[WP)
public static void sort(int[] data) { Z5p [*LMO
sort(data, IMPROVED_QUICK); tpblm|sW
} inFS99DKx
private static String[] name={ Gr4v&Mz:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fwvwmZW
}; >C19Kie72
ah%Ws#&
private static Sort[] impl=new Sort[]{ mITNx^p4f
new InsertSort(), I tb_ H
new BubbleSort(), RRXp9{x`
new SelectionSort(), :}yT?LIyP
new ShellSort(), ?;_*8Doq-a
new QuickSort(), 1Au+X3
new ImprovedQuickSort(), :0,yq?M
new MergeSort(), e_|Z&
new ImprovedMergeSort(), @H<*|3J
new HeapSort() sPG500=)
}; :G6aO
$_iE^zZaU^
public static String toString(int algorithm){ L$i:~6
return name[algorithm-1]; B]H8^
} q-+:1E
F(#?-MCs
public static void sort(int[] data, int algorithm) { lKB9n}P
impl[algorithm-1].sort(data); -|Zzs4bx
} 7FJ4;HLQ
_3:%b6&Pz
public static interface Sort { 6UqAs<c9
public void sort(int[] data); Av?R6
} A.Wf6o
0ki- /{;
public static void swap(int[] data, int i, int j) { vc&v+5Y
int temp = data; J8!2Tt
data = data[j]; 9(J,&)J
data[j] = temp; &92/qRh7
} ol*,&C:{
} ^?Mp(o