[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; !UD62yw~
} zVs_|x="
int i1=l; 1{%EQhNd
int i2=mid+1; ,LXuU8sB
for(int cur=l;cur<=r;cur++){ &tKs t,UR8
if(i1==mid+1) <}%>a@
data[cur]=temp[i2++]; &j/ WjZPF
else if(i2>r) +b]g;
data[cur]=temp[i1++]; 6:B[8otQ
else if(temp[i1] data[cur]=temp[i1++]; :eI.E:/'
else vZC2F
data[cur]=temp[i2++]; x!q$`zF\\
} ,SJB3if
} .bvB8VOrW
$6:j3ZTXrt
} |Gjd
nD.4c-hd$q
改进后的归并排序: #GK&{)$
TeQWrms
package org.rut.util.algorithm.support; FpfOxF6A3
!xMyk>%2
import org.rut.util.algorithm.SortUtil; I?"cEp
_{,e-_hYM
/** MyuFZ7Q4$
* @author treeroot mY.[AIB
* @since 2006-2-2 sRo%=7Z
* @version 1.0 [S":~3^B6
*/ >E?626*
public class ImprovedMergeSort implements SortUtil.Sort { DJrE[wI
<!&nyuSz
private static final int THRESHOLD = 10; kAf:_0?6
B{QY-F~
/* A7-QOqST(
* (non-Javadoc) Te2XQU2,F
* v%V$@MF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S'V0c%'QQV
*/ W*-+j*e|_P
public void sort(int[] data) { 1d|+7
int[] temp=new int[data.length]; rO 6oVz#x
mergeSort(data,temp,0,data.length-1); 'HkV_d[li
} " 9 h]P^
d/- f]
private void mergeSort(int[] data, int[] temp, int l, int r) { pF#nj`L
int i, j, k; j,Qp*b#Qo
int mid = (l + r) / 2; WU{G_Fqaz
if (l == r) 3yDa5q{
return; 'wLQ9o%=p|
if ((mid - l) >= THRESHOLD) 6\g]Y
mergeSort(data, temp, l, mid); EdE,K1gD
else &BCl>^wn}
insertSort(data, l, mid - l + 1); V;~W,o!
if ((r - mid) > THRESHOLD) <y\>[7Y
mergeSort(data, temp, mid + 1, r); Cz Jze
else ?A2#V(4
insertSort(data, mid + 1, r - mid); QOEcp% 6I}
e[yk'E
for (i = l; i <= mid; i++) { 3F[z]B
temp = data; 5sEq`P}5
} !V$m!i;
for (j = 1; j <= r - mid; j++) { Sh*LD QL<?
temp[r - j + 1] = data[j + mid]; z(aei(U=
} 9Rzu0:r.,
int a = temp[l]; `3SY~&X
int b = temp[r]; B~V^?."
for (i = l, j = r, k = l; k <= r; k++) { {b"V7vn,
if (a < b) { N{tNe-5
data[k] = temp[i++]; 4EJ
a = temp; yK_$6EtNKj
} else { G 2+A`\]
data[k] = temp[j--]; 7d]}BLpjWz
b = temp[j]; U{} bx
} 9h<];
} C!]hu)E
} ib0M$Y1tIS
t`o-HWfS.
/** PR|F-/o
* @param data fDNiU"
* @param l vtKQvQ
* @param i 9sFZs]uM
*/ G}&B{Ir
private void insertSort(int[] data, int start, int len) { p2GkI/6)uu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (2[tQ`~
} 1CU-^j
} r;g[<6`!S
} "6w-jT
} 0+}42g|_Z
)AEJ`xC
堆排序： 7$b!-I+a2
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package org.rut.util.algorithm.support; d00#;R
f(:+JH<P~
import org.rut.util.algorithm.SortUtil; =5/ow!u8
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/** |tIr?nXSW3
* @author treeroot $nF|n+m
* @since 2006-2-2 /2l&D~d"
* @version 1.0 _8A
*/ z/!LC;(
public class HeapSort implements SortUtil.Sort{ SK [1h3d
7aRtw:PQn
/* (non-Javadoc) 7rQwn2XD{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @W6:JO
*/ )12.W=p
public void sort(int[] data) { ">cLPXX
MaxHeap h=new MaxHeap(); +Ac.@!X}%
h.init(data); SQ8xfD*
for(int i=0;i h.remove(); [p3{d\=*?
System.arraycopy(h.queue,1,data,0,data.length); IR;l{q&`
} yJQ>u
7OAM
private static class MaxHeap{ *N>n5B2
-fpe
void init(int[] data){ $`j%z@[g
this.queue=new int[data.length+1]; _D~l2M
for(int i=0;i queue[++size]=data; "| Oj!&0
fixUp(size); !yqez
} & "i4og<
} Y`F)UwKK
B@cC'F#G
private int size=0; +t*V7nW
yPY}b_W
private int[] queue; ~,ZU+
DW( /[jo\
public int get() { O6*2oUKqK
return queue[1]; Kzwbr?&z
} F>Pr`T?>
Hjhgu=
public void remove() { r{>Q{$Q
SortUtil.swap(queue,1,size--); RW~!)^
fixDown(1); hL4T7`
} I~T
file://fixdown .RNY}bbk
private void fixDown(int k) { >{6U1ft):
int j; Tp46K\}Uf
while ((j = k << 1) <= size) { 8Q%g<jX*
if (j < size %26amp;%26amp; queue[j] j++; mR|L'[l
if (queue[k]>queue[j]) file://不用交换 Ml_Hq>\U
break; D:] QBA)C
SortUtil.swap(queue,j,k); wE[gp+X~
k = j; d|#&j."
} e,kxg^
} ZnKjU ]m
private void fixUp(int k) { IG+g7kDCY
while (k > 1) { E1r-$gf_
int j = k >> 1; }7non
if (queue[j]>queue[k]) b5Q|$E
break; hrNB"W|?x
SortUtil.swap(queue,j,k); {FQ@eeU
k = j; @E 8P>kq
} @An}
} 0=0,ix7?#
\sMe2OL#z
} zu3Fi= |0
H )51J:4
} Y5CDdn
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SortUtil： +0}z3T1L
i0:1+^3^U
package org.rut.util.algorithm; 7s0\`eXo/
=cpUc]~
import org.rut.util.algorithm.support.BubbleSort; },n?
import org.rut.util.algorithm.support.HeapSort; WNY:HH
import org.rut.util.algorithm.support.ImprovedMergeSort; NnH]c+
import org.rut.util.algorithm.support.ImprovedQuickSort; NSa6\.W)
import org.rut.util.algorithm.support.InsertSort; zO`4W!x&
import org.rut.util.algorithm.support.MergeSort; h1t~hrq
import org.rut.util.algorithm.support.QuickSort; 3k3C\Cw
import org.rut.util.algorithm.support.SelectionSort; 6r|=^3{
import org.rut.util.algorithm.support.ShellSort; yky%+@2q
lD^c_b
/** 0G31Kou
* @author treeroot &szYa-K*
* @since 2006-2-2 V408uy-M
* @version 1.0 ]]0Yh
*/ ?K+q~DzNSD
public class SortUtil { ~NZL~p
public final static int INSERT = 1; ;j.-6#n
public final static int BUBBLE = 2; E!'6vDVC:
public final static int SELECTION = 3; AsD$M*It
public final static int SHELL = 4; o%bf7)~s
public final static int QUICK = 5; ~-<MoCm!
public final static int IMPROVED_QUICK = 6; ,Nt^$2DZW
public final static int MERGE = 7; t~7OtPF
public final static int IMPROVED_MERGE = 8; (dfC}x(3h
public final static int HEAP = 9; c]h@<wnv
0SfW:3
public static void sort(int[] data) { B0U(B\~Y
sort(data, IMPROVED_QUICK); ;4U"y8PVTh
} l?QA;9_R'
private static String[] name={ +OqEe[Wk#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]#Cc7wa
}; ue^HhZ9
GE`1j'^-
private static Sort[] impl=new Sort[]{ &|j0GP&
new InsertSort(), I_5/e>9
new BubbleSort(), U shIQh
new SelectionSort(), s7afj t
new ShellSort(), RC}m]!Uz
new QuickSort(), w3ATsIw
new ImprovedQuickSort(), _p>F43%p
new MergeSort(), ,-hbwd~M
new ImprovedMergeSort(), (H5#r2h%Y
new HeapSort() ,{mv6?_
}; m}u)C&2>
X;H\u6-|>6
public static String toString(int algorithm){ NXQ=8o9,9
return name[algorithm-1]; !zvjgDlZv
} PtYG%/s
IITUM)
public static void sort(int[] data, int algorithm) { Th$Z9+()
impl[algorithm-1].sort(data); @R}3f6@67
} |_+#&x
AT)b/ycC
public static interface Sort { ;DSH$'1i
public void sort(int[] data); Ml$<x"Q
} QyxUK}6mr
gROK4'j6y
public static void swap(int[] data, int i, int j) { P3`$4p?
int temp = data; (BFwE@1"
data = data[j]; &e6UEG
data[j] = temp; (8aj`> y
} J^`5L7CO
} -uWV( ,|