[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; d?E4[7<t$1
} 8F.(]@NY
int i1=l; [29$~.m$Y
int i2=mid+1; ^S3A10f,
for(int cur=l;cur<=r;cur++){ !/[AQ{**T!
if(i1==mid+1) .Pqj6Ko9
data[cur]=temp[i2++]; s')!<E+z\t
else if(i2>r) \y<+Fac1S
data[cur]=temp[i1++]; pq@$&G
else if(temp[i1] data[cur]=temp[i1++]; KF*B
else >l6XZQ >
data[cur]=temp[i2++]; &<m WA]cAL
} RNsJ!or
} Q9SPb6O2
pZW}^kg=
} T`j
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改进后的归并排序: xXl$Mp7
eDvXU_yA
package org.rut.util.algorithm.support; {_+>"esc
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import org.rut.util.algorithm.SortUtil; %pQdq[J={
t"4Rn<-
/** 8'>.#vyMGv
* @author treeroot xy2eJJq
* @since 2006-2-2 e=|F(iW
* @version 1.0 #IcT @(
*/ s#4))yUR6Z
public class ImprovedMergeSort implements SortUtil.Sort { )3d:S*ly
_AA`R`p;
private static final int THRESHOLD = 10; axt6u)4%7:
k0Oc,P`'*
/* Va&KIHw
* (non-Javadoc) m^(E:6T
* zhD`\&G.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GhaAvyN
*/ j>0SE
public void sort(int[] data) { Fvcq^uZ
int[] temp=new int[data.length]; >V77X+!
mergeSort(data,temp,0,data.length-1); ,5%aP%
} V1AEjh
h=mI{w*
private void mergeSort(int[] data, int[] temp, int l, int r) { J:k@U42
int i, j, k; aa'0EU:
int mid = (l + r) / 2; :X]lXock0
if (l == r) -#:Y+"'
return; !^Qb[ev
if ((mid - l) >= THRESHOLD) u:p:*u_^I
mergeSort(data, temp, l, mid); +Uc&%Px
else j.e`ip
insertSort(data, l, mid - l + 1); D z]}@Z*jK
if ((r - mid) > THRESHOLD) C[HE4xF6
mergeSort(data, temp, mid + 1, r); VbY>l' rY
else =iPd@f"$
insertSort(data, mid + 1, r - mid); j8F~j?%!
u/K)y:ZZ
for (i = l; i <= mid; i++) { BBZ)H6TzL
temp = data; cviN$oL
} '{1W)X
for (j = 1; j <= r - mid; j++) { -+Awm{X_@
temp[r - j + 1] = data[j + mid]; j/; @P
} pU\xzLD
int a = temp[l]; zS>:7eG
int b = temp[r]; )yz9? ]a
for (i = l, j = r, k = l; k <= r; k++) { rA&#>R`
if (a < b) { n[S41809<
data[k] = temp[i++]; ^y;OHo
a = temp; z;Gbqr?{{
} else { P"[l86:
data[k] = temp[j--]; zrWq!F*-V\
b = temp[j]; K{7S
} .LhbhUEfn
} OQX{<pQ6
} 9#.NPfMF
eo}S01bt
/** g~WNL^GGS
* @param data b{ubp
* @param l S|Ij q3
* @param i NUO,"Bqq
*/ FcbA)7dD
private void insertSort(int[] data, int start, int len) { Cvu8X&y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U3dR[*
} ^FyvaO
} ,nuDoc
} ct|'I]nB.h
} n!EH>'T
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堆排序： <8xP-(wk;
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package org.rut.util.algorithm.support; _<' kzOj
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import org.rut.util.algorithm.SortUtil; f%"_U'
O7#}8-@}<u
/** c`N`xU+z
* @author treeroot ]$`s}BN
* @since 2006-2-2 {D_4~heF
* @version 1.0 * y"GgI
*/ Ar{=gENn
public class HeapSort implements SortUtil.Sort{ 1rzq$,O
\t~u :D
/* (non-Javadoc) S0o,)`ZB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m@ 'I|!^
*/ U*Q5ff7M6"
public void sort(int[] data) { 9@&Z`b_
MaxHeap h=new MaxHeap(); QW"6]
h.init(data); e|+;j}^C
for(int i=0;i h.remove(); ,LW%'tQ~"
System.arraycopy(h.queue,1,data,0,data.length); E'kQ
} z$im4'\c
u=UM^C!
private static class MaxHeap{ KzH}5:qI
RX<^MzCDV
void init(int[] data){ JNz"lTt>[g
this.queue=new int[data.length+1]; {II7%\ya
for(int i=0;i queue[++size]=data; ez<wEtS
fixUp(size); %A[p!U
} NbK?Dg8WJG
} A#07Ly8kXn
:+V1682u
private int size=0; b-=[(]_$h
0 VgnN
private int[] queue; z E7ocul
e hB1`%@
public int get() { .$x[!fuuR&
return queue[1]; <OO/Tn'a
} oG_'<5Bv>
}4ghT(C}$
public void remove() { qYrGe
SortUtil.swap(queue,1,size--); $T%<'=u|E
fixDown(1); zSM7x
} ;<GTtt#D
file://fixdown _"t.1+-K
private void fixDown(int k) { %TggNU,
int j; }oxaB9r
while ((j = k << 1) <= size) { 0tL/:zID
if (j < size %26amp;%26amp; queue[j] j++; ?b''
if (queue[k]>queue[j]) file://不用交换 7VZ JGRnn
break; t 6IaRD
SortUtil.swap(queue,j,k); zinl.8Uk
k = j; T_B.p*\BM
} tMk>Bx9[
} gkn/E}K#
private void fixUp(int k) { bb_jD^
while (k > 1) { OcS`Fxs
int j = k >> 1; XGl13@=O
if (queue[j]>queue[k]) TF3q?0
break; w 4gZ:fR=
SortUtil.swap(queue,j,k); 5J#gJFA
k = j; nv[Sb%/
} ,* vnt6C*
} s3RyLT
'\mZ7.Jj
} 3#ZKuGg=
Ip|^?uyrk
} Wjk;"_"gd
!P^$g R
SortUtil： 1? hd
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package org.rut.util.algorithm; 9wJmX<Rm
v@s`l#
import org.rut.util.algorithm.support.BubbleSort; ;{7lc9uRj
import org.rut.util.algorithm.support.HeapSort; @"7dk.|
import org.rut.util.algorithm.support.ImprovedMergeSort; hGHzO
import org.rut.util.algorithm.support.ImprovedQuickSort; Llc|j&yHQ
import org.rut.util.algorithm.support.InsertSort; >f05+%^[
import org.rut.util.algorithm.support.MergeSort; pXlBKJmW
import org.rut.util.algorithm.support.QuickSort; M<m64{m1
import org.rut.util.algorithm.support.SelectionSort; F+9`G[
import org.rut.util.algorithm.support.ShellSort; [bVP2j
0P/LW|16
/** ? bg pUv
* @author treeroot T.dO0$,Q@$
* @since 2006-2-2 ojqX#>0K
* @version 1.0 ~{!!=@6
*/ M#2U'jy
public class SortUtil { uM<+2S
public final static int INSERT = 1; jCv+m7Z
public final static int BUBBLE = 2; VQx-gm8}!
public final static int SELECTION = 3; %4^/.) Q
public final static int SHELL = 4; > V}NG
public final static int QUICK = 5; pr89zkYw
public final static int IMPROVED_QUICK = 6; '^Np<
public final static int MERGE = 7; .7rsbZzs
public final static int IMPROVED_MERGE = 8; GV[BpH
public final static int HEAP = 9; s'=]a-l~
.Vjpkt:H
public static void sort(int[] data) { xEWa<P#.u
sort(data, IMPROVED_QUICK); 7+-}8&syu
} Rp9iX~A`e
private static String[] name={ S60`'!y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sgsMlZ3/
}; <W^~Y31:0
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private static Sort[] impl=new Sort[]{ 0].5[Jo
new InsertSort(), 8rNxd=!
new BubbleSort(), b4PK
new SelectionSort(), "n-xsAG
new ShellSort(), w2V E_
new QuickSort(), !]T|=yw
new ImprovedQuickSort(), '(>N gd[
new MergeSort(), ?`}U|]c
new ImprovedMergeSort(), t\0JNi$2
new HeapSort() m_f^#:
}; &!MKqJ@t
;<rJ,X#
public static String toString(int algorithm){ ]`m5!V_Y
return name[algorithm-1]; emO!6]0gJ
} H9[.#+ln
_{);n$`
public static void sort(int[] data, int algorithm) { P=z':4,M}
impl[algorithm-1].sort(data); svgi!=
} <[~M|OL9q,
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public static interface Sort { gI{F"7fa=
public void sort(int[] data); `-2`UGB-
} zg"ZXZ
5%/%i}e~(
public static void swap(int[] data, int i, int j) { 2ARh-zLb
int temp = data; 3Mt6iZW
data = data[j]; 4B(qVf&M
data[j] = temp; t|_g O!w8
} q[g^[~WM#
} Iqv 5lo .