[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; +wz`_i)!
} KSgQ:_u4}
int i1=l; 8g# Y
int i2=mid+1; +A'q#~yILa
for(int cur=l;cur<=r;cur++){ |P. =
if(i1==mid+1) LTYuxZ
data[cur]=temp[i2++]; vN0L(B
else if(i2>r) U-~*5Dd
data[cur]=temp[i1++]; J"D&q
else if(temp[i1] data[cur]=temp[i1++]; 1(:b{Bl
else ]*g ss'N
data[cur]=temp[i2++]; ^b"x|8
} SA`J.4yn
} 8V=HyF#
t7*G91Hoq&
} 0{"dI;b%
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改进后的归并排序: u]1-h6
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package org.rut.util.algorithm.support; oz\{9Lwc
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import org.rut.util.algorithm.SortUtil; JO&;bT<
f*|8n$%
/** (5Z8zNH`3
* @author treeroot T.R>xd`9 "
* @since 2006-2-2 I5TQ>WJbf
* @version 1.0 VGTeuu5i
*/ F,L82N6\U
public class ImprovedMergeSort implements SortUtil.Sort { 45r]wT(C
@H3s2|
private static final int THRESHOLD = 10; ,yHzo
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/* &#vk4C_8m
* (non-Javadoc) F1?CqN M
* z^ aCQ3E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jpYw#]Q
*/ Pg*?[^*
public void sort(int[] data) { xVsa,EX b
int[] temp=new int[data.length]; CU#L *kz
mergeSort(data,temp,0,data.length-1); `G"|MM>P
} sW]yuu!/
U,%s;
private void mergeSort(int[] data, int[] temp, int l, int r) { h"VpQhi
int i, j, k; e/]O<,*
int mid = (l + r) / 2; S\! a"0$
if (l == r) ;-3h~k
return; G?Qe"4 .
if ((mid - l) >= THRESHOLD) N<L$gw+)$D
mergeSort(data, temp, l, mid); lF;ziF
else `YFkY^T
insertSort(data, l, mid - l + 1); _9Dn\=g
if ((r - mid) > THRESHOLD) ZfFIX5Qd\
mergeSort(data, temp, mid + 1, r); -vv
else O tXw/
insertSort(data, mid + 1, r - mid); =gMaaGg p,
) >>u|#@z
for (i = l; i <= mid; i++) { [5]R?bQ0q{
temp = data; th.M.jas
} 2k.S[?)
for (j = 1; j <= r - mid; j++) { rtB|N-
temp[r - j + 1] = data[j + mid]; !pd7@FwC
} gZw\*9Q9
int a = temp[l]; uuI3NAi~
int b = temp[r]; U-Af7qO
for (i = l, j = r, k = l; k <= r; k++) { q6;OS.f
if (a < b) { M*g2VyZ
data[k] = temp[i++]; K%Usjezv&
a = temp; L/qZ ;{
} else { :@:g*w2K
data[k] = temp[j--]; |RHO+J
b = temp[j]; 68vxI|EZ
} 3mpP|b"
} C$KaT3I
} 3M}AxEu
!d:tIu{)
/** Tx y]"_
* @param data K&j'c
* @param l hWe}'L-
* @param i k TFz_*6.
*/ 1t0bUf;(M
private void insertSort(int[] data, int start, int len) { w0#%AK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *Zc9yZl2
} H"2U)HJl
} ]a78tTi
} s ;48v
} MNkKy(Za
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堆排序： 0v;ve
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package org.rut.util.algorithm.support; 0Wa#lkn$I
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import org.rut.util.algorithm.SortUtil; 8r5xs-
G=vN;e_$_b
/** (&q@~ dJ
* @author treeroot l#b:^3
* @since 2006-2-2 |__d 8a
* @version 1.0 j6`6+W=S(
*/ 7}gA0fP9
public class HeapSort implements SortUtil.Sort{ O\%j56Bf
Q{O/xLf
/* (non-Javadoc) X)I/%{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x]H3Y3
*/ /#29Y^Z)=
public void sort(int[] data) { 2K Pqu:lv
MaxHeap h=new MaxHeap(); ^n t~-%
h.init(data); c qv.dC
for(int i=0;i h.remove(); $,!hD\a
System.arraycopy(h.queue,1,data,0,data.length); nZe\5`
} VcP:}a< B\
R j-jAH
private static class MaxHeap{ 4>l0V<
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void init(int[] data){ S45'j(S=
this.queue=new int[data.length+1]; dZF8R
for(int i=0;i queue[++size]=data; R;%^j=Q
fixUp(size); S=4R5igrC
} .-J`d=Krp
} !TGr.R
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private int size=0; *jGPGnSo
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private int[] queue; 4AJ9`1d4
.6LS+[
public int get() { hRk,vB]
return queue[1]; 8*vFdoE_oO
} iW'_R{)T
f]c<9Q>*
public void remove() { 7$K}qsr<
SortUtil.swap(queue,1,size--); n7@j}Q(&?
fixDown(1); <H!O:Mf_p
} Bf/|{@
file://fixdown WBa /IM
private void fixDown(int k) { :fhB*SYK
int j; a`s/qi
while ((j = k << 1) <= size) { R#D#{cC(
if (j < size %26amp;%26amp; queue[j] j++; 7O"hiDQ
if (queue[k]>queue[j]) file://不用交换 &eU3(F`.
break; W|0My0y
SortUtil.swap(queue,j,k); ghX:"vV{n
k = j; @bE~@4mOu
} X`D+jiQ(f
} 2!BsEvB(
private void fixUp(int k) { =88t*dH(,"
while (k > 1) { .izf#r:<
int j = k >> 1; h>| g2h
if (queue[j]>queue[k]) i]dz}=j'
break; jK e.gA
SortUtil.swap(queue,j,k); 1EQvcw#
k = j; v:?o3 S
} xuF5/(__
} q P'[&h5Y
q#jEv-j.
} >GmN~"iJ
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} d[S#Duz<&
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SortUtil： YroNpu]s
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package org.rut.util.algorithm; [1Uz_HY["3
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import org.rut.util.algorithm.support.BubbleSort; H@Q`
import org.rut.util.algorithm.support.HeapSort; Hxn<(gd G
import org.rut.util.algorithm.support.ImprovedMergeSort; z|Ap\[GS
import org.rut.util.algorithm.support.ImprovedQuickSort; LZ4xfB(
import org.rut.util.algorithm.support.InsertSort; `/0u{[
import org.rut.util.algorithm.support.MergeSort; 4QO/ff[ o
import org.rut.util.algorithm.support.QuickSort; SD^E7W$?
import org.rut.util.algorithm.support.SelectionSort; JCNk\@0i*
import org.rut.util.algorithm.support.ShellSort; e$32
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/** :6zC4Sr^
* @author treeroot )d:K:YXt
* @since 2006-2-2 8<{;=m8cQ
* @version 1.0 XddHP;x
*/ BKX9SL]
public class SortUtil { Fe5jdV<
public final static int INSERT = 1; %Lyz_2q A
public final static int BUBBLE = 2; x~z_,':
public final static int SELECTION = 3; -Uri|^t
public final static int SHELL = 4; c_Tzyh7l4
public final static int QUICK = 5; K\aAM;)-
public final static int IMPROVED_QUICK = 6; Xo8DEr
public final static int MERGE = 7; NocFvF7\
public final static int IMPROVED_MERGE = 8; /K@$#x_{
public final static int HEAP = 9; 3p&jLFphL
`.[ 8$
public static void sort(int[] data) { SY|Ez!tU:N
sort(data, IMPROVED_QUICK); vtZ?X';wh
} L1{T ?aII
private static String[] name={ gApz:K[l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [IMQIX
}; YmgCl!r@
ami09JHy
private static Sort[] impl=new Sort[]{ .jargvAL*
new InsertSort(), }PZ=`w*O
new BubbleSort(), / gu3@@h
new SelectionSort(), JhJLqb@q
new ShellSort(), '?8Tx&}U8
new QuickSort(), . ,R4WA,
new ImprovedQuickSort(), \K}aQKB/j
new MergeSort(), :u-.T.zZl
new ImprovedMergeSort(), OXCQfT@\
new HeapSort() cix36MR_
}; R8 jovr
PQ3h\CL1n
public static String toString(int algorithm){ i-.c=M
return name[algorithm-1]; mW +tV1XjG
} F@EJtwLd5y
*KJ7nRKx(w
public static void sort(int[] data, int algorithm) { J=9#mOcg"
impl[algorithm-1].sort(data); AerFgQiS
} t%$@fjz
!+KhFC&Py
public static interface Sort { ,E9d\+j
public void sort(int[] data); (tKMBxQo8
} M _(2sq
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public static void swap(int[] data, int i, int j) { GO~k '
int temp = data; Q1T@oxV
data = data[j]; A?,A(-0C
data[j] = temp; |7c`(.
} )5GQJiY
} Q7(eq0na