[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; h9I)<_}R
} X*"Kg
int i1=l; nIjQLx
int i2=mid+1; g5Dx9d{
for(int cur=l;cur<=r;cur++){ {K:Utdu($q
if(i1==mid+1) $dP)8_Z2
data[cur]=temp[i2++]; W/>?1+r.Z
else if(i2>r) iy]}1((hR
data[cur]=temp[i1++]; $3TTHS o
else if(temp[i1] data[cur]=temp[i1++]; i .N1Cvp&
else 7fay:_
data[cur]=temp[i2++]; $vBU}~l7
} JF*g!sV%
} >, E$bm2
9+QrTO
} 6p"c^
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改进后的归并排序: ]M(mq`K
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package org.rut.util.algorithm.support; *d@Hnu"q
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import org.rut.util.algorithm.SortUtil; EaD@clJS
=%\6}xPEl<
/** EKPTDKut
* @author treeroot ;J(,F:N
* @since 2006-2-2 C._sgO
* @version 1.0 ak) -OL1
*/ X~he36-+<
public class ImprovedMergeSort implements SortUtil.Sort { XO#)i6}G
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private static final int THRESHOLD = 10; 0Qp'}_
,)$KS*f"*z
/* 38rZ`O*D
* (non-Javadoc) 5|CiwQg|,p
* 3\n{,Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #( sNk,^Ax
*/ =&pN8PEn\
public void sort(int[] data) { &fW=5'
int[] temp=new int[data.length]; s[q4K
mergeSort(data,temp,0,data.length-1); %vtSeJ
} ;p 5v3<PC
K$cIVsfr
private void mergeSort(int[] data, int[] temp, int l, int r) { g/,Bx!'8p
int i, j, k; oqba:y;AR
int mid = (l + r) / 2; B bw1k
if (l == r) SECQVA_y`
return; RQCQGa^cP
if ((mid - l) >= THRESHOLD) V;-.38py
mergeSort(data, temp, l, mid); Ue#yDTjc
else _IV@^v
insertSort(data, l, mid - l + 1); )v=G}j^
if ((r - mid) > THRESHOLD) cXcx_-
mergeSort(data, temp, mid + 1, r); (VaN\+I:T
else RVnyl`s
insertSort(data, mid + 1, r - mid); h+3Z.WKhwP
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for (i = l; i <= mid; i++) { Ig3(|{R
temp = data; g]<Z]R`
} OgN1{vRFx
for (j = 1; j <= r - mid; j++) { L4pjh&+8
temp[r - j + 1] = data[j + mid]; =O#AOw`
} G>,nZ/,A{
int a = temp[l]; %lJiM`a
int b = temp[r]; 6 2`PK+
for (i = l, j = r, k = l; k <= r; k++) { NWHH.1|
if (a < b) { Q|B|#?E==
data[k] = temp[i++]; ; eF4J
a = temp; Rca Os
} else { $SzCVWS
data[k] = temp[j--]; Qf-k&d
b = temp[j]; 9G&l qfX:
} y3nm!tjyM
} C^" Hj
} O)xEF~DaD
6IY}SI0N
/** tnF9Vj[#%_
* @param data mvA xx`jc
* @param l *:T>~ilF
* @param i Sq|1f?_gU
*/ gZ"{{#:}
private void insertSort(int[] data, int start, int len) { gn W~KLqH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r.wIk0
} N9=r#![>,
} 2v9s@k/k)6
} K%c ATA3
} U=i8>6V
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堆排序： ]X: rby$
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package org.rut.util.algorithm.support; !+A"Lej
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import org.rut.util.algorithm.SortUtil; j t`p<gI
7#9'2dI
/** 380->
* @author treeroot '^ e/F)0
* @since 2006-2-2 sL7`=a.&T
* @version 1.0 ]v@tZ}
*/ Iwt2}E(e
public class HeapSort implements SortUtil.Sort{ @b!R2Yq
"dK|]w8
/* (non-Javadoc) y/}VtD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c_z/At;4
*/ L_gsG|xX
public void sort(int[] data) { aC,vh1")F
MaxHeap h=new MaxHeap(); < k+fKl
h.init(data); e.}3OK
for(int i=0;i h.remove(); LD~Jbq
System.arraycopy(h.queue,1,data,0,data.length); `F2*o47|t
} 3_oD[ ])A
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private static class MaxHeap{ B)DC,+@$
Jl>at
void init(int[] data){ D){"fw+b
this.queue=new int[data.length+1]; 2[LX\
for(int i=0;i queue[++size]=data; gl9pgY1ni
fixUp(size); @r/Id{pCI
} 8XYD L]I'
} ?BDlB0jxzi
u_4:#~b
private int size=0; ?b@q5Y
*H%0Gsk
private int[] queue; 6>=-/)p}
$ o5V$N D
public int get() { T^'*_*m
return queue[1]; ?+ -/';
} FI`nRFq)C
(pE\nuA\
public void remove() { T+K` ^xv_L
SortUtil.swap(queue,1,size--); %;<k(5bhGJ
fixDown(1); J\xz^%p
} ycrh5*g
file://fixdown )'j_D<
private void fixDown(int k) { )l!J$X+R
int j; h{W$ fZc<
while ((j = k << 1) <= size) { Y|m_qB^_
if (j < size %26amp;%26amp; queue[j] j++; qD(fYOX{C
if (queue[k]>queue[j]) file://不用交换 bIb6yVnHi
break; u+mjguIv
SortUtil.swap(queue,j,k); Q$?7)yyu+
k = j; 7cUR.PI#Q
} %UUp=I
} s<Ex"+
private void fixUp(int k) { ReI=4Jq11
while (k > 1) { N?a1sdR
int j = k >> 1; P&[Ft)`
if (queue[j]>queue[k]) :jk)(=^
break; ~{7zm"jN
SortUtil.swap(queue,j,k); {WYu0J@
k = j; hF{x')(#l
} jU]]:S4xD/
} `P^u:
<}28=d
} K-2o9No?j`
vs\'1^*D
} ldAov\X
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SortUtil： $PatHY@h
'w`SBYQ5
package org.rut.util.algorithm; X+dR<GN+YX
;g: U[cE
import org.rut.util.algorithm.support.BubbleSort; l~]hGLviJE
import org.rut.util.algorithm.support.HeapSort; [Krm .)
import org.rut.util.algorithm.support.ImprovedMergeSort; t4f (Y,v
import org.rut.util.algorithm.support.ImprovedQuickSort; zB#_:(1qK
import org.rut.util.algorithm.support.InsertSort; LyuSZa]
import org.rut.util.algorithm.support.MergeSort; MekT?KPQ{L
import org.rut.util.algorithm.support.QuickSort; ( oQ'4,F
import org.rut.util.algorithm.support.SelectionSort; FF%\gJ
import org.rut.util.algorithm.support.ShellSort; 0Y5LDP
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/** .mvB99P{<
* @author treeroot x[vpoB+c
* @since 2006-2-2 g(-;_j!=
* @version 1.0 Ci]'G>F@"
*/ tMxsR>sH
public class SortUtil { Q3'fz 9v
public final static int INSERT = 1; 0hrCG3k.91
public final static int BUBBLE = 2; 0V<Aub[${
public final static int SELECTION = 3; x r-;,W
public final static int SHELL = 4; _7Xd|\Zc
public final static int QUICK = 5; z$9@j2
public final static int IMPROVED_QUICK = 6; t[]['Iosd
public final static int MERGE = 7; `Mg8]H~
public final static int IMPROVED_MERGE = 8; cJxW;WI!,
public final static int HEAP = 9; d{QMST2&
&_"ORqn&
public static void sort(int[] data) { ^y&q5p jj
sort(data, IMPROVED_QUICK); ;\<""Yj@l
} \p5|}<Sr)
private static String[] name={ zb"rMzCH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SQh+5
}; :d;[DYFLxb
69t7=r
private static Sort[] impl=new Sort[]{ F;IP3tD
new InsertSort(), mSU@UD|'
new BubbleSort(), C-Nuy1o
new SelectionSort(), c:=7lI
new ShellSort(), `%$8cZ-kr
new QuickSort(), _REqT
new ImprovedQuickSort(), <e;jWK
new MergeSort(), dv"as4~%
new ImprovedMergeSort(), f'1(y\_fb
new HeapSort() c*N50%=4
}; Iq)(UfaSve
ctp?y
public static String toString(int algorithm){ {/-y>sm
return name[algorithm-1]; j_!bT!8
} }TSgAwsbC
dX_!0E[c
public static void sort(int[] data, int algorithm) { Wt>J`
impl[algorithm-1].sort(data); x|.v{tQa
} mfZ)^X
]kRI}Om2
public static interface Sort { j*tk(o}qG
public void sort(int[] data); bsB},pc
} _~tm7o+js
fZ[kh{|
public static void swap(int[] data, int i, int j) { y&1%1 #8F
int temp = data; uCw>}3
data = data[j]; RG&I\DTyt
data[j] = temp; }-d)ms!
} EbCIIMbe"
} K'x4l,rq