[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; Wgt[ACioN
} OIuEC7XM^C
int i1=l; C>d_a;pX
int i2=mid+1; z8SrZ#mg
for(int cur=l;cur<=r;cur++){ /mb?C/CI
if(i1==mid+1) A{5^A)$
data[cur]=temp[i2++]; *20$u% z2
else if(i2>r) `Ns$HV
data[cur]=temp[i1++]; ZYy,gu<
else if(temp[i1] data[cur]=temp[i1++]; Q)\~=/Lb
else y^o*wz:D*
data[cur]=temp[i2++]; bIR AwktD
} Q1fJ`A=
} r*|#*"K"a
ay\e#)
} ?I6us X9$
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改进后的归并排序: q1Ja*=r
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package org.rut.util.algorithm.support; @O7hY8",
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import org.rut.util.algorithm.SortUtil; q;dg,Om
wt;7+
/** *CHLs^)
* @author treeroot vjy59m
* @since 2006-2-2 yw|O,V<4N
* @version 1.0 3x=f}SO&
*/ <+1d'VQ2
public class ImprovedMergeSort implements SortUtil.Sort { hrpql_9.
#S57SD
private static final int THRESHOLD = 10; =Fq"lq %
,\y)k}0lH
/* x \.qzi
* (non-Javadoc) vJheM*C
* _;] 3w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X~DI d
*/ "v @h
public void sort(int[] data) { SH"e x,=
int[] temp=new int[data.length]; Iv6(Z>pAB
mergeSort(data,temp,0,data.length-1); ^f:oKKaAW;
} iWbrX1 I+
fdIO'L_
private void mergeSort(int[] data, int[] temp, int l, int r) { > .L\>
int i, j, k; 1 m)WM,L
int mid = (l + r) / 2; JG%y_ Qy?K
if (l == r) '%@fW:r~
return; ,O[HX?>
if ((mid - l) >= THRESHOLD) jG"n);WF
mergeSort(data, temp, l, mid); I`?6>Z+%)
else ?U~9d"2=
insertSort(data, l, mid - l + 1); <P)vx
if ((r - mid) > THRESHOLD) K,7IBv,B[
mergeSort(data, temp, mid + 1, r); /8\gT(@
else 1epj/bB&
insertSort(data, mid + 1, r - mid); 9?xMsu-H
DYJ F6O
for (i = l; i <= mid; i++) { -r%3"C=m
temp = data; +I$ k_
} xFU*,Y
for (j = 1; j <= r - mid; j++) { kY8aK8M
temp[r - j + 1] = data[j + mid]; /Ulv/Thl
} 4ZY0!'be-R
int a = temp[l]; ,qF;#nB-
int b = temp[r]; :Ogt{t
for (i = l, j = r, k = l; k <= r; k++) { #&JhA2]q
if (a < b) { j[zo~Y4z
data[k] = temp[i++]; #HjiE
a = temp; Ww9%6 #it
} else { &,pL3Qos
data[k] = temp[j--]; =2[5g!qX
b = temp[j]; '.jr" 3u
} J?d&+mt
} KZFnp=i
} (Sr D
D -Goi-4
/** !,f{I5/
* @param data }@ Nurs)%_
* @param l b5kw*h+/'h
* @param i C?v_ig
*/ [<;4$}f\
private void insertSort(int[] data, int start, int len) { dg9 DBn#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8lAs~c
} gOkq>i_
} jmgU'w-s
} {\!_S+}{
} 3urL*Fw,
%:bTOw[4r
堆排序： ][b_l(r$?
!a"RHg:HO
package org.rut.util.algorithm.support; 0^l|W|.Z
Tx)X\&ij&
import org.rut.util.algorithm.SortUtil; %d<uOCf\Q
u{F^Ngy )
/** zKycd*X
* @author treeroot 's.%rre%
* @since 2006-2-2 UZ8 vZ
* @version 1.0 8!a6)Zeux
*/ pBW|d\8
public class HeapSort implements SortUtil.Sort{ .VFa,&5;3
9>y6zFTV
/* (non-Javadoc) ?&Zfb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }cov"o
*/ }}AooziH9
public void sort(int[] data) { aJ[K'5|
MaxHeap h=new MaxHeap(); 5,3Yt~\m
h.init(data); F`W8\u'db
for(int i=0;i h.remove(); Vo@[
System.arraycopy(h.queue,1,data,0,data.length); *\9JIi 2
} H5@N<v5u
(DzV3/+p^
private static class MaxHeap{ iOCx7j{BS
5(@P1Bi
void init(int[] data){ }yde9b?F
this.queue=new int[data.length+1]; >heFdKq1
for(int i=0;i queue[++size]=data; nwH'E
fixUp(size); ]#n,DU}V
} nJ!`^X5I
} qA4w*{JN
t@KN+ C
private int size=0; h^{D "
&X0qH8W
private int[] queue; }O+F#/6
o.qeF4\d6
public int get() { u`Ew^-">
return queue[1]; 2=X\G~a
} ?NV3]vl
~-r*2bR
public void remove() { jD@KG
SortUtil.swap(queue,1,size--); 2rS|V|d
fixDown(1); |Qq_;x]
} obUX7N
file://fixdown i3T]<&+j5
private void fixDown(int k) { dW3q
int j; 1aC?*,e?
while ((j = k << 1) <= size) { zLQplw`#
if (j < size %26amp;%26amp; queue[j] j++; F<'@T,LVc
if (queue[k]>queue[j]) file://不用交换 o<\CA[
break; TCW[;d
SortUtil.swap(queue,j,k); `(j}2X'[
k = j; Hu"?wZj
} tvH{[e$
} }@-4*5P3
private void fixUp(int k) { B(<;]
while (k > 1) { ekB!d
int j = k >> 1; >P7|-bV
if (queue[j]>queue[k]) P4vW.|@
break; [[{y?-U
SortUtil.swap(queue,j,k); tx=~bm"*?
k = j; JFw<Po,MEa
} k_)H$*
} ^rd]qii"
&%QtUPvr9
} ISy\g`d`C
&5fM8Opkd
} vi+k#KE
92}UP=RW!
SortUtil： a0y7a/@c
V,=V
package org.rut.util.algorithm; F<wwuCbF
&lg+uK
import org.rut.util.algorithm.support.BubbleSort; '5V2{k$4U
import org.rut.util.algorithm.support.HeapSort; A;~u"g'z&
import org.rut.util.algorithm.support.ImprovedMergeSort; 52-Gk2dp
import org.rut.util.algorithm.support.ImprovedQuickSort; chE~UQ
import org.rut.util.algorithm.support.InsertSort; B2UQO4[w
import org.rut.util.algorithm.support.MergeSort; (uBevU\
import org.rut.util.algorithm.support.QuickSort; fL[(;KcAa
import org.rut.util.algorithm.support.SelectionSort; n GE3O#fv
import org.rut.util.algorithm.support.ShellSort; ht8%A 1|
8 Zy`Z
/** ^+CTv
* @author treeroot }]cKOv2
* @since 2006-2-2 `>^2MHF3LT
* @version 1.0 )L?JH?$C
*/ T7E9l
public class SortUtil { '2+Rb7V
public final static int INSERT = 1; ve.rpF\
public final static int BUBBLE = 2; [ Fid
public final static int SELECTION = 3; o,a3J:j]
public final static int SHELL = 4; 9OYsI
public final static int QUICK = 5; tA?P$5?-*
public final static int IMPROVED_QUICK = 6; +(d\`{A
public final static int MERGE = 7; <<>?`7N
public final static int IMPROVED_MERGE = 8; Q>y2C8rnJ/
public final static int HEAP = 9; 9;3f`DK@2k
[([?+Ouy
public static void sort(int[] data) { y>zPsc,
sort(data, IMPROVED_QUICK); S?.2V@Ic
} !Kv.v7'N/k
private static String[] name={ yQ)y#5/<6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wTBp=)1)f
}; q7-Eu4w
uQ4WM
private static Sort[] impl=new Sort[]{ Z2d,J>-
new InsertSort(), $_,?SXM
new BubbleSort(), ]Y!$HT7\
new SelectionSort(), U[5
new ShellSort(), D.G+*h@ g
new QuickSort(), a@_.uD
new ImprovedQuickSort(), #7OUqp
new MergeSort(), 3^kZydZCN
new ImprovedMergeSort(), 7<&CN0&
new HeapSort() |n-NK&Y(o
}; %H\i}}PTe
LO8V*H(
public static String toString(int algorithm){ w]w>yD>$
return name[algorithm-1]; Lc;4 Hg
} mVGQyX
jdxwS
public static void sort(int[] data, int algorithm) { OZdiM&Zss
impl[algorithm-1].sort(data); gf6<`+/
} D6!`p6r+
HpI[Af}l
public static interface Sort { mq@2zE`.(
public void sort(int[] data); @D%H-X
} <\]o#w*:
xcO Si>
public static void swap(int[] data, int i, int j) { m_~!Lj[u.
int temp = data; E )D*~2o/
data = data[j]; l ,0]iVJ
data[j] = temp; r=[T5,L(s
} e2|2$|
} f1F#U@U