[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; 4zyQ"?A~
} 1iF=~@Nz_
int i1=l; m]n2wmE3n
int i2=mid+1; "Vp nr +6
for(int cur=l;cur<=r;cur++){ 9B0ON*`
if(i1==mid+1) :H]d1
data[cur]=temp[i2++]; 4#IT" i
else if(i2>r) 2VN].t:
data[cur]=temp[i1++]; #gC[L=01
else if(temp[i1] data[cur]=temp[i1++]; ?EFRf~7JP
else G[k3`
data[cur]=temp[i2++]; e0`z~z]6&
} hY&Yp^"}]^
} aKj|gwo!
NxHUOPAJc
} ~q ^o|?
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改进后的归并排序: b G:\*1T
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package org.rut.util.algorithm.support; CTNL->
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import org.rut.util.algorithm.SortUtil; $?56 i4
n4{%M
/** +9Tc.3vQ
* @author treeroot EVPQe-
* @since 2006-2-2 ;\pVc)\4"
* @version 1.0 aj5HtP-
*/ 'gf[Wjb,%
public class ImprovedMergeSort implements SortUtil.Sort { z8X7Y >+SA
.y s_'F-]0
private static final int THRESHOLD = 10; [.}qi[=n
1$0Kvvg[
/* vfkF@^D
* (non-Javadoc) 2d.$V,U<
* *Ypn@YpSp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @;4;72@O
*/ =dAAb\:
public void sort(int[] data) { AX v q~XE
int[] temp=new int[data.length]; MH.+pqIv^
mergeSort(data,temp,0,data.length-1); t(3f} ?
} H,%bKl#
7fR5V
private void mergeSort(int[] data, int[] temp, int l, int r) { U6&`s%mIa
int i, j, k; 0f@+o}i=)
int mid = (l + r) / 2; uz!8=,DFw
if (l == r) ({E,}x
return; u !BU^@P
if ((mid - l) >= THRESHOLD) rCw4a?YS
mergeSort(data, temp, l, mid); @\g}I`_M
else FsED9+/m
insertSort(data, l, mid - l + 1); !/p|~K
if ((r - mid) > THRESHOLD) )J 'F]s
mergeSort(data, temp, mid + 1, r); lq9|tt6Z
else nq!=9r
insertSort(data, mid + 1, r - mid); IH`Q=Pj
FDl/7P`b(
for (i = l; i <= mid; i++) { C'I&<
temp = data; sx#O3*'>1
} 76w[X=Fv
for (j = 1; j <= r - mid; j++) { TDo)8+.2z
temp[r - j + 1] = data[j + mid]; Y(Qb)>K
} S(PV*e8
int a = temp[l]; <W0(!<U
int b = temp[r]; ??/bI~Sd
for (i = l, j = r, k = l; k <= r; k++) { zx$YNjeV
if (a < b) { b\"F6TF:
data[k] = temp[i++]; 6:2*<
a = temp; NMkP#s7.y
} else { qraXAQ
data[k] = temp[j--]; x"z\d,O%W
b = temp[j]; Tr?p/9.m
} g4^-B
} R[m-jUL
} ?^~ZsOd8B
PlB3"{}0Q
/** .s<0}<Aq>
* @param data -- %XkO
* @param l WR #XPbk
* @param i lR %#R
*/ &4OJJ9S
private void insertSort(int[] data, int start, int len) { Ar>B_*dr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )|=1;L
} V(TtOuv
} fK7 ?"^`/
} xo@1((|z
} hF-QbO
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堆排序： @{@b^tk
h{)m}"n<R
package org.rut.util.algorithm.support; e`0C0GaP
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import org.rut.util.algorithm.SortUtil; z- q.8~Z
|cC3L09
/** o+|>D&CW%
* @author treeroot {qw'gJmX
* @since 2006-2-2 [x)T2sA
* @version 1.0 9Z-2MF
*/ 5mAb9F8@
public class HeapSort implements SortUtil.Sort{ +k6` tl~*
7u"Q1n(h/
/* (non-Javadoc) %i\rw*f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CNRSc4Le
*/ m@<,bZkl
public void sort(int[] data) { uRy}HLZ"
MaxHeap h=new MaxHeap(); G+=Gc(J
h.init(data); bg|$1ue
for(int i=0;i h.remove(); j*QdD\)
System.arraycopy(h.queue,1,data,0,data.length); ZW;Ec+n_K
} Qy9_tvq X
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private static class MaxHeap{ fExFpR,`
KOg,V_(I
void init(int[] data){ o135Xh$_>'
this.queue=new int[data.length+1]; i5r<CxS
for(int i=0;i queue[++size]=data; rTR$\ [C
fixUp(size); \Hb!<mrp
} ;I5P<7VW
} -+){;,
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private int size=0; +\+j/sa
NzZ(Nz5
private int[] queue; p{oz}}
pq0Z<b;2
public int get() { .+>fD0fW7Y
return queue[1]; fmYx
} ox SSEs
iJOoO"Ai
public void remove() { w&IYCYK_
SortUtil.swap(queue,1,size--); 3F,M{'q
fixDown(1); Jm ,:6T
} \r aP
file://fixdown 8T"L'{ggWB
private void fixDown(int k) { G>pedE\
int j; 5!ngM
while ((j = k << 1) <= size) { ;r2DQg"#@
if (j < size %26amp;%26amp; queue[j] j++; f IV"U
if (queue[k]>queue[j]) file://不用交换 C1AX
break; M"]?'TMfXc
SortUtil.swap(queue,j,k); <]?71{7X
k = j; g Nz
} Hva!6vwO%O
} JAHmmNlW
private void fixUp(int k) { k|xmZA*
while (k > 1) { DzhLb8k
int j = k >> 1; * 0K]/tn<
if (queue[j]>queue[k]) 9V)cf
break; )*%uG{h
SortUtil.swap(queue,j,k); %o9mG<.T
k = j; |j"C52Q
} $Ud9v4
} kPOk.F%)
HpbwW=;V
} TS#1+f]9J<
=_&,^h@'3e
} Z3o HOy
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SortUtil： #}.{|'L
R;AcAJ;
package org.rut.util.algorithm; lYe2;bu
@}jg5}
import org.rut.util.algorithm.support.BubbleSort; yq, qS0Fo
import org.rut.util.algorithm.support.HeapSort; &T-:`(
import org.rut.util.algorithm.support.ImprovedMergeSort; "viZ"/~6
import org.rut.util.algorithm.support.ImprovedQuickSort; xe OfofC(l
import org.rut.util.algorithm.support.InsertSort; @/aJi6d"^E
import org.rut.util.algorithm.support.MergeSort; bHq.3;
import org.rut.util.algorithm.support.QuickSort; j^/<:e c.
import org.rut.util.algorithm.support.SelectionSort; >WO;q
import org.rut.util.algorithm.support.ShellSort; y-@`3hYM@
}#Up:o]A!
/** n{|j#j
* @author treeroot yo5-x"ze
* @since 2006-2-2 /p;OZf]
* @version 1.0 GQ Flt_
*/ k'.cl^6Z8
public class SortUtil { e8SAjl"}
public final static int INSERT = 1; \B 8j9
public final static int BUBBLE = 2; Dt5AG
public final static int SELECTION = 3; "pX|?ap
public final static int SHELL = 4; WjVm{7?{
public final static int QUICK = 5; uYFy4E3
public final static int IMPROVED_QUICK = 6; |@rf#,hTDp
public final static int MERGE = 7; o7tlkSZ
public final static int IMPROVED_MERGE = 8; K\}qYdPF
public final static int HEAP = 9; {'P?wv
!j6CvclT
public static void sort(int[] data) { </9c=GoJ
sort(data, IMPROVED_QUICK); |I]G=.*E
} `j2|aX %Z*
private static String[] name={ f U<<GK70
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SP=8v0
}; z\k6."e_&
cor!Sa>
private static Sort[] impl=new Sort[]{ ;[C_ho
new InsertSort(), 4\U"e*
new BubbleSort(), 22d>\u+c
new SelectionSort(), Yg!fEopLb
new ShellSort(), 3cqc<
new QuickSort(), M%13b$i~f
new ImprovedQuickSort(), J"eE9FLM
new MergeSort(), RXO}mu]Iu
new ImprovedMergeSort(), |Ntretz`\
new HeapSort() !':y8(Ou
}; Q >h7H{c
0 4ceDe
public static String toString(int algorithm){ rb.:(d)T
return name[algorithm-1]; lA,[&
} O2Y1D`&5
9j5k=IXg#a
public static void sort(int[] data, int algorithm) { Y>i Qp/k:
impl[algorithm-1].sort(data); ;k1VY Ie}
} 1N.weey}W
Zh:@AFz:R
public static interface Sort { 6 #jpA.;
public void sort(int[] data); 2ak*aI
} 1VXn`O?LW
p1s& y0:d
public static void swap(int[] data, int i, int j) { {bNKyT
int temp = data; jJkc vC8d
data = data[j]; F @!9rl'
data[j] = temp; ?DM!=.]
} !M7727
} .P!pC