[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; q\gvX 76a
} ZRr S""V
int i1=l; 875BD U
int i2=mid+1; '#faNVPABh
for(int cur=l;cur<=r;cur++){ 0;pOQF
if(i1==mid+1) ^S'tMT_
data[cur]=temp[i2++]; GY;q0oQ,
else if(i2>r) 7TN94@kCF
data[cur]=temp[i1++]; t4E=
else if(temp[i1] data[cur]=temp[i1++]; N2_9V~!
else YDMimis\H5
data[cur]=temp[i2++]; baVSQtda
} J)xc mK
} l-mf~{
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} ,J0BG0jB^u
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改进后的归并排序: 4;hgi[
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package org.rut.util.algorithm.support; rtM!|apr
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import org.rut.util.algorithm.SortUtil; =z$XqT.'
Qy+&N*k>
/** zz+p6`
* @author treeroot ;Pi-H,1b
* @since 2006-2-2 Sn lKPd
* @version 1.0 A/4HR]
*/ P,[O32i#
public class ImprovedMergeSort implements SortUtil.Sort { 1TvR-.e
O7AW9*<
private static final int THRESHOLD = 10; P95A_(T=[
[Nn ?:5"
/* @Ja8~5:
* (non-Javadoc) VY9|8g/
* u< ,c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q/,jv5
*/ 79svlq=
public void sort(int[] data) { W l+[{#
int[] temp=new int[data.length]; uKcwVEu
mergeSort(data,temp,0,data.length-1); uM^eoh_
} m% {4
1E*No1
private void mergeSort(int[] data, int[] temp, int l, int r) { 0` {6~p
int i, j, k; ~KufSt*
int mid = (l + r) / 2; .#] V5g,
if (l == r) R""P01IZH
return; oVLgHB\zL
if ((mid - l) >= THRESHOLD) :OVre*j
mergeSort(data, temp, l, mid); =a<};X
else &l=%*`On
insertSort(data, l, mid - l + 1); M=hH:[6 &
if ((r - mid) > THRESHOLD) E.kjYIH8
mergeSort(data, temp, mid + 1, r); uWYI p\NN
else s2{d<0x?v
insertSort(data, mid + 1, r - mid); ?1?zmaS
0DBA 'Cv
for (i = l; i <= mid; i++) { `KgWaf-
temp = data; R`F54?th
} HCI|6{k
for (j = 1; j <= r - mid; j++) { xnW3,:0
temp[r - j + 1] = data[j + mid]; \p-3P)U
} |@x^5Ab$T
int a = temp[l]; 0 7CufoI
int b = temp[r]; |-HV@c]
for (i = l, j = r, k = l; k <= r; k++) { {1Z`'.FU
if (a < b) { YFVNkBO%
data[k] = temp[i++]; ^0/FZ)V8
a = temp; +%'S>g0W=
} else { p. eq N
data[k] = temp[j--]; 3+_ .I{
b = temp[j]; cGhnI&
} ,{HxX0
} :[1^IH(sb
} )5}=^aqd
t}zffe-
/** +h}>UK\
* @param data /R@,c B=
* @param l GnlP#;
* @param i }hralef #N
*/ UvSvgDMl
private void insertSort(int[] data, int start, int len) { )")_aA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gNdEPaaFI
} G`B e~NU
} ;/ iBP2
} [4NJ]r M%
} FYI*44E
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堆排序： =kz(1Pb
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package org.rut.util.algorithm.support; i(^&ZmG
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import org.rut.util.algorithm.SortUtil; :1q)l
s4@dEK8W
/** 2F0@M|'
* @author treeroot W0X/&v,k*
* @since 2006-2-2 {8)Pke
* @version 1.0 8\?7k
*/ z+K-aj w
public class HeapSort implements SortUtil.Sort{ iNX%Zk[
h01 HX
/* (non-Javadoc) Fb&Xy{kt1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c/Fy1Lv\
*/ l,n0=Ew
public void sort(int[] data) { jP?YV
MaxHeap h=new MaxHeap(); T5; zgr
h.init(data); )~{T
for(int i=0;i h.remove(); QxRT%;'Zh]
System.arraycopy(h.queue,1,data,0,data.length); g\CRx^s
} ~C1lbn b
i`3h\ku
private static class MaxHeap{ `ZCeuOH
^ lrq`1k
void init(int[] data){ (!72Eaw:]
this.queue=new int[data.length+1]; .E'Tfa
for(int i=0;i queue[++size]=data; CdCo+U5z{
fixUp(size); B{UL(6\B
} sb Wn1 T U
} 9`P<|(
Gkz\By
private int size=0; >h^CC*&'pw
u^DfRd&P0
private int[] queue; LUGyc( h
DJxe3<
public int get() { :DI``]Si\
return queue[1]; _MF:?p,l
} 3*< O-Jr
#k%$A}9
public void remove() { &cDLSnR
SortUtil.swap(queue,1,size--); Hc`)Q vFRW
fixDown(1); EwvW: t1
} 4~mYj@lvd
file://fixdown WmO.&zp
private void fixDown(int k) { )-D{]>8
int j; _4eSDO[h
while ((j = k << 1) <= size) { !c}?u_Z/
if (j < size %26amp;%26amp; queue[j] j++; .<0|V
if (queue[k]>queue[j]) file://不用交换 |'$E-[
break; Tm!pAD
SortUtil.swap(queue,j,k); P9Yee!*H
k = j; CH!>RRF
} S$ u`)BG):
} Wpgp YcPS
private void fixUp(int k) { HeV6=&#
while (k > 1) { @>>8CU^~
int j = k >> 1; Y?ADM(j
if (queue[j]>queue[k]) +#%#QL
break; BE`{? -G
SortUtil.swap(queue,j,k); eI?|Ps{S
k = j; [1+ o
} [BPK0
} 4R 9lA
`/W6,]
} v|IPus|>
_Xs(3V@'}
} Q"o* \I
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SortUtil： &J>XKO nl
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package org.rut.util.algorithm; tM&O<6Y
]>j>bHG
import org.rut.util.algorithm.support.BubbleSort; OVwcjhQ
import org.rut.util.algorithm.support.HeapSort; /y8=r"'G
import org.rut.util.algorithm.support.ImprovedMergeSort; #~3$4j2U(y
import org.rut.util.algorithm.support.ImprovedQuickSort; iME)Jl&
import org.rut.util.algorithm.support.InsertSort; h(M_ K
import org.rut.util.algorithm.support.MergeSort; ^^q9+0@
import org.rut.util.algorithm.support.QuickSort; #%Z 0!
import org.rut.util.algorithm.support.SelectionSort; 3X&'hz@
import org.rut.util.algorithm.support.ShellSort; O!uZykdX4!
K fM6(f:
/** GyirE`
* @author treeroot BHmmvbM#Qm
* @since 2006-2-2 qDG{hvl[1r
* @version 1.0 Pu|PIdu!08
*/ (R'GrN>
public class SortUtil { mEL<d,XhI
public final static int INSERT = 1; 29a~B<e7s
public final static int BUBBLE = 2; Ptt
public final static int SELECTION = 3; (d9G`
public final static int SHELL = 4; 54X=58Q
public final static int QUICK = 5; 7T\LYDT
public final static int IMPROVED_QUICK = 6; gu~JB
public final static int MERGE = 7; %Aqt0e
public final static int IMPROVED_MERGE = 8; b-)m'B}`
public final static int HEAP = 9; HuVx^y` @
p$5uS=:4`8
public static void sort(int[] data) { Ly\ `
sort(data, IMPROVED_QUICK); 8i epG
} @fI1|v=eF
private static String[] name={ T^z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B^7B-RBi0
}; I_?+;<n
)6~s;y!
private static Sort[] impl=new Sort[]{ [h5~1N
new InsertSort(), fGZZ['E
new BubbleSort(), m`;dFL7"E
new SelectionSort(), (]_smsok
new ShellSort(), UF_?T.Rl^
new QuickSort(), dBWi1vTF
new ImprovedQuickSort(), D)O2=aQ;]
new MergeSort(), p`+=) n
new ImprovedMergeSort(), [8kufMY|
new HeapSort() 'P AIh*qA
}; !6`pq
n]%T>\gw
public static String toString(int algorithm){ 5`_UIYcI
return name[algorithm-1]; ''Pu
} U4$}8~o4
Jw+k=>
public static void sort(int[] data, int algorithm) { tv]^k]n{rf
impl[algorithm-1].sort(data); (h8RthQt
} Ihn#GzM?u
U"qR6
public static interface Sort { QIK;kjr*A3
public void sort(int[] data); %qycxEVP
} i?HN
{wp~
public static void swap(int[] data, int i, int j) { +hIC N,8!
int temp = data; eNHSfq
data = data[j]; !#NGGIp;
data[j] = temp; EDDld6O,
} ;bYpMcH
} hL?"!