[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; &0-Pl.M
} H{Na'_sL
int i1=l; \z2d=E
int i2=mid+1; dBW#PRg
for(int cur=l;cur<=r;cur++){ #-d-zV*
if(i1==mid+1) -%t8a42
data[cur]=temp[i2++]; -ktYS(8&
else if(i2>r) B#4 J![BX
data[cur]=temp[i1++]; e}L(tXZ
else if(temp[i1] data[cur]=temp[i1++]; a\I`:RO=<Z
else GuJIN"P]
data[cur]=temp[i2++]; .q$/#hN:e
} ]6HnK%
} 2Xfy?U
_LZ 442
} NMP*q @
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改进后的归并排序: /3~}=b
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package org.rut.util.algorithm.support; tLx8}@X"
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import org.rut.util.algorithm.SortUtil; z.kBQ{P
2wgdrO|B
/** {|@N~c+
* @author treeroot Wy$Q!R=i
* @since 2006-2-2 g|4v>5Y
* @version 1.0 Al]z=
*/ .ZH5^Sv$vp
public class ImprovedMergeSort implements SortUtil.Sort { :.\h.H;
TC'^O0aZ_
private static final int THRESHOLD = 10; \V.U8asfI
dtq]_HvTJ
/* 9'JkLgz;d+
* (non-Javadoc) ;4]l P
* |n&EbOmgf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v#+tu,)V;
*/ H\e<fi%Q
public void sort(int[] data) { QgX[?2
int[] temp=new int[data.length]; rkWW)h(e
mergeSort(data,temp,0,data.length-1); 9L9mi<,
} 8f|+045E@
fBt7#Tc=U
private void mergeSort(int[] data, int[] temp, int l, int r) { tA{<)T
int i, j, k; JTB5#S4W
int mid = (l + r) / 2; 6@ )bZ|
if (l == r) pG:)u cj
return; u@zBE? g
if ((mid - l) >= THRESHOLD) -^7n+ QX
mergeSort(data, temp, l, mid); uc;QSVWGy8
else 9Uh nr]J.
insertSort(data, l, mid - l + 1); tt>=Vt'
if ((r - mid) > THRESHOLD) h9J
mergeSort(data, temp, mid + 1, r); S b3@7^
else uw@|Y{(K r
insertSort(data, mid + 1, r - mid); jDc5p3D&[]
wD&b[i
for (i = l; i <= mid; i++) { _&m
temp = data; T/C1x9=?
} W1J7$
for (j = 1; j <= r - mid; j++) { V|fs"HY
temp[r - j + 1] = data[j + mid]; [HENk34
} uJ$!lyJ6L
int a = temp[l]; c =i6
int b = temp[r]; n_*k e
for (i = l, j = r, k = l; k <= r; k++) { Nm=W?i
if (a < b) { nEm+cHHo?
data[k] = temp[i++]; 1{V*(=Tp
a = temp; xTL"%'|
} else { SLc'1{
data[k] = temp[j--]; 07+Qai-]
b = temp[j]; D*j\gI
} QRv2%^L
} `4 A%BKYB
} 4<&`\<jZ
_\LAWQ|M4[
/** 5q?ZuAAA
* @param data I(Yyg,1Z
* @param l ,9p 4(jjX
* @param i |ldRs'c{
*/ K(HP PM\
private void insertSort(int[] data, int start, int len) { ,tL<?6_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L[*Xrp;/&
} I.\fhNxHY
} /^\6q"'
} 'DQKpk'
} (v8jVbg
7m=tu?@
堆排序： @vaK-&|#$
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package org.rut.util.algorithm.support; /%U+kW
a ^b_&}y
import org.rut.util.algorithm.SortUtil; Bn/{J
GV([gs
/** amIG9:-1'
* @author treeroot v>71?te
* @since 2006-2-2 @DrMaTr
* @version 1.0 Khxl'qj
*/ ALiXT8q
public class HeapSort implements SortUtil.Sort{ \5Jpr'mY5
DxT8;`I%
/* (non-Javadoc) gX34'<Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }cG!93
*/ 7!`,P
public void sort(int[] data) { snV,rZ
MaxHeap h=new MaxHeap(); s7<x~v+^
h.init(data); FHI`/
for(int i=0;i h.remove(); RI"A'/56
System.arraycopy(h.queue,1,data,0,data.length); g#1_`gK
} Jn.WbS
g~Zel}h#
private static class MaxHeap{ ,\f!e#d
`Q*L!/K+
void init(int[] data){ `|;R}"R;
this.queue=new int[data.length+1]; ;K0kQ<y-Y
for(int i=0;i queue[++size]=data; W@1Nit-R
fixUp(size); ?*a:f"vQ
} 5TVDt
} C-$S]6
[dL4u^]{
private int size=0; A -G?@U
>v`lsCGb
private int[] queue; v*1UNXU\
>9(lFh0P
public int get() { [C)-=.Xx)j
return queue[1]; Be+vC=\K
} d:6?miMH]t
xGJ{_M
public void remove() { m#mM2Guxe
SortUtil.swap(queue,1,size--); !h{qO&ZH=
fixDown(1); 2`Xy}9N/Y
} z)r)w?A
file://fixdown HP2]b?C
private void fixDown(int k) { #m6 eG&a
int j; _U)DL=a'
while ((j = k << 1) <= size) { INsc!xOQ
if (j < size %26amp;%26amp; queue[j] j++; e;56}w
if (queue[k]>queue[j]) file://不用交换 h84}lxT^]
break; _pM&Ya
SortUtil.swap(queue,j,k); C$xU!9K[+
k = j; _gjsAbM
} e7ixi^Q
} rE-Xv. |
private void fixUp(int k) { CEE`nn
while (k > 1) { ;Id%{1
int j = k >> 1; 2Tt@2h_L
if (queue[j]>queue[k]) Bhl@\Kq
break; Ft>Abj,6
SortUtil.swap(queue,j,k); IDb|J%e^P
k = j; ,YJ\ $?
} Q_xE:#!;
} yw2^kk93|
c-!rJHL`
} iK1<4)
1K&z64Q5J
} [J0L7p*6
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SortUtil： G:$wdT(u
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package org.rut.util.algorithm; 6|t4\'
BCk$FM@
import org.rut.util.algorithm.support.BubbleSort; iVzv/Lqm1
import org.rut.util.algorithm.support.HeapSort; ~oh=QakW
import org.rut.util.algorithm.support.ImprovedMergeSort; -@-cG\{
import org.rut.util.algorithm.support.ImprovedQuickSort; 2P~zYdjS
import org.rut.util.algorithm.support.InsertSort; M;={]w@n
import org.rut.util.algorithm.support.MergeSort; b2. xJ4
import org.rut.util.algorithm.support.QuickSort; {n=)<w
import org.rut.util.algorithm.support.SelectionSort; z@^l1)m
import org.rut.util.algorithm.support.ShellSort; 0m6Vf x
lqa.Nj
/** a-,!K
* @author treeroot !-%i" a
* @since 2006-2-2 +Cl(:kfYB
* @version 1.0 ZkkXITQkPM
*/ @kn0f`
public class SortUtil { ^)conSm
public final static int INSERT = 1; /i$E|[
public final static int BUBBLE = 2; _`|Hk2O
public final static int SELECTION = 3; |AW[4Yn>
public final static int SHELL = 4; V= U=
public final static int QUICK = 5; a;D{P`%n
public final static int IMPROVED_QUICK = 6; ~sshhuF
public final static int MERGE = 7; /cUcfe#X
public final static int IMPROVED_MERGE = 8; (X@JlAfB
public final static int HEAP = 9; 0:R}
0F6^[osqtl
public static void sort(int[] data) { h #Od tc1)
sort(data, IMPROVED_QUICK); y.26:c(
} =O1N*'e
private static String[] name={ 6]rIYc[,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k!b\qS~Q
}; Mb=vIk{Bf
P Ig)h-w?
private static Sort[] impl=new Sort[]{ _ro^<V$%
new InsertSort(), 8Br*
new BubbleSort(), ;?1H&
new SelectionSort(), UP}Ys*
new ShellSort(), W)ihk\E
new QuickSort(), sH(4.36+
new ImprovedQuickSort(), r.0IC*Y
new MergeSort(), Q\ TawRK8
new ImprovedMergeSort(), /<vbv
new HeapSort() 3:X3n\z
}; m+||t
7R[4XQ%
public static String toString(int algorithm){ ehl){Dd^
return name[algorithm-1]; |Xk'd@<
} 2i*-ET
mBSa*s)
public static void sort(int[] data, int algorithm) { W#E`h
impl[algorithm-1].sort(data); 3t5`,R1@t
} u;p{&\(]
s3kHNDdC
public static interface Sort { H%> E6rVB
public void sort(int[] data); G1z[v3T
} ~UX@%0%)N
(wU<Kpt?J
public static void swap(int[] data, int i, int j) { B>*zQb2:
int temp = data; "<H.F87Z)
data = data[j]; -"[o|aa^
data[j] = temp; |} ;&xI
} X:bv ?o>Y
} ~q4KQ&.!