[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; K<sCF[
} WKM)*@#,
int i1=l; hn)a@
int i2=mid+1; &-yGVx
for(int cur=l;cur<=r;cur++){ V3N0Og3
if(i1==mid+1) cR{>IH4^
data[cur]=temp[i2++]; H!IshZfktn
else if(i2>r) 2C^B_FUg|]
data[cur]=temp[i1++]; 5ABhj*7
else if(temp[i1] data[cur]=temp[i1++]; n| O [a6G
else yqOuX>m1c
data[cur]=temp[i2++]; Yj(4&&Q
} EOKzzX7 S
} Iry
4NR@u\S
} G* b2,9&F
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改进后的归并排序: \,UZX&ip
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package org.rut.util.algorithm.support; :,pSWfK H
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import org.rut.util.algorithm.SortUtil; ;$j7H&UNQj
#C*8X+._y
/** Yepe=s+9
* @author treeroot er.L7
* @since 2006-2-2 al9.}
* @version 1.0 x<i}_@Sn_+
*/ {U!St@
public class ImprovedMergeSort implements SortUtil.Sort { gIEl.
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private static final int THRESHOLD = 10; (n{wg(R
pI[ZBoR~
/* ,3DXFV'uxb
* (non-Javadoc) ?dZt[vAMn
* 9 t n!t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N[|Nxm0z/C
*/ g+8hp@a
public void sort(int[] data) { 1n*W2:,z
int[] temp=new int[data.length]; ,.IEDF<&
mergeSort(data,temp,0,data.length-1); 8[%Ao/m
} qa >Ay|92e
=4!nFi
private void mergeSort(int[] data, int[] temp, int l, int r) { 1r)kR@!LNG
int i, j, k; cp Ear
int mid = (l + r) / 2; n}-3o]ku
if (l == r) Ok-.}q>\Mv
return; ;(6g\'m
if ((mid - l) >= THRESHOLD) VzS&`d.h
mergeSort(data, temp, l, mid); @gGRm
else BZK`O/
insertSort(data, l, mid - l + 1); 4pz|1Hw7
if ((r - mid) > THRESHOLD) }A$WO{2
mergeSort(data, temp, mid + 1, r); s Wjy6;
else ({}(qm
insertSort(data, mid + 1, r - mid); ewsKH\#
]LPQYL
for (i = l; i <= mid; i++) { cFd >oDS
temp = data; i=FQGWAUu
} `ejUs]SR
for (j = 1; j <= r - mid; j++) { y? (2U6c
temp[r - j + 1] = data[j + mid]; XkKC!
} QvPD8B
int a = temp[l]; wt}9B[
int b = temp[r]; o6kNx>tc)
for (i = l, j = r, k = l; k <= r; k++) { hmbj*8
if (a < b) { AF\T\mtvRm
data[k] = temp[i++]; C"T1MTB
a = temp; J<n+\F-s
} else { ;+"f
data[k] = temp[j--]; z+2V4s=
b = temp[j]; wgeNs9L
} pj|pcv^
} >:sUL<p
} tS# `.F~y
5 +9Ze9
/** :bU(S<%M
* @param data Ac k}QzXO
* @param l :HViX:]H
* @param i +~Cy$MCX
*/ Fr?z"
private void insertSort(int[] data, int start, int len) { e59dVFug.U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P3tx|:gV
} 7iC *Pr
} TTNkr`
} 8 }'|]JK
} [(LV
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堆排序： jLg@FDb~
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package org.rut.util.algorithm.support; ;a"q'5+Ne
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import org.rut.util.algorithm.SortUtil; aiCFH_H4;L
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/** v"u^M-_
* @author treeroot ][PzgzG
* @since 2006-2-2 ~o3Hdd_#}N
* @version 1.0 }WFf''Z-
*/ }7<5hn E
public class HeapSort implements SortUtil.Sort{ Zwt;d5U
D6D1S/:ij'
/* (non-Javadoc) 9W*+SlH@!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qf'm=efRyu
*/ JM$.O;y -
public void sort(int[] data) { pz^<\
MaxHeap h=new MaxHeap(); XP[uF ;w
h.init(data); K5Wg"^AHY/
for(int i=0;i h.remove(); 1tzV8(7
System.arraycopy(h.queue,1,data,0,data.length); u}hF8eD
} ,M !tm7
<M?:
private static class MaxHeap{ wl=61Mb
-OZ 5vH0
void init(int[] data){ ^:, l\Y
this.queue=new int[data.length+1]; RH0>ZZR
for(int i=0;i queue[++size]=data; 5R$G(Ap_
fixUp(size); i yYJR
} mbl]>JsQD
} y2HxP_s?P?
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private int size=0; yKagT$-
=?0lA_ 0
private int[] queue; }`VDD?M
<c[U#KrvJ
public int get() { wHjLd$ +o
return queue[1]; FwKj+f"
} =Yo1v=wxN
9D\4n
public void remove() { d87vl13
SortUtil.swap(queue,1,size--); Qq-"Cg@-/
fixDown(1); 4S0>-?{
} /h2b;"
file://fixdown bte~c
private void fixDown(int k) { {'+QH)w(
int j; z"4]5&3A
while ((j = k << 1) <= size) { XK(`mEi
if (j < size %26amp;%26amp; queue[j] j++; +KGZHO!
if (queue[k]>queue[j]) file://不用交换 =]R3& ]#n
break; VvbFp
SortUtil.swap(queue,j,k); MWk:sBCqr
k = j; ;#GoGb4AM
} jd`},X/
} S&C1TC
private void fixUp(int k) { X8eJ4%
while (k > 1) { A?Qa 4i
int j = k >> 1; 3q[WHwmm
if (queue[j]>queue[k]) ivgpS5 M`Y
break; ajl 2I/D
SortUtil.swap(queue,j,k); ChryJRuwv5
k = j; hlZ@Dq%f
} SZ![%)83
} S/vf'gj
rtJl _0`
} `pZs T ^G[
%wV>0gQTf
} }H4=HDO
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SortUtil： j Ib
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package org.rut.util.algorithm; x Ha=3n
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import org.rut.util.algorithm.support.BubbleSort; PHg48Y"Nd
import org.rut.util.algorithm.support.HeapSort; et,GrL)l
import org.rut.util.algorithm.support.ImprovedMergeSort; jg 2qGC
import org.rut.util.algorithm.support.ImprovedQuickSort; ^ OJyN,A
import org.rut.util.algorithm.support.InsertSort; t-u|U(n
import org.rut.util.algorithm.support.MergeSort; V5"CSMe
import org.rut.util.algorithm.support.QuickSort; NY$uq+Z>
import org.rut.util.algorithm.support.SelectionSort; m^%|ZTrwN7
import org.rut.util.algorithm.support.ShellSort; d&cU*
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/** QlFZO4 P3|
* @author treeroot +YOKA*
* @since 2006-2-2 wCs3:@UH
* @version 1.0 7z6b@$,
*/ \ A1uhHP!
public class SortUtil { ){s*n=KIO
public final static int INSERT = 1; vqslirC
public final static int BUBBLE = 2; P=L$;xgp
public final static int SELECTION = 3; |6:=}dE#[
public final static int SHELL = 4; $$i.O}
public final static int QUICK = 5; 1PaUI#X"2F
public final static int IMPROVED_QUICK = 6; A\rt6/
public final static int MERGE = 7; <HWS:'1
public final static int IMPROVED_MERGE = 8; @4~=CV%j
public final static int HEAP = 9; Dq\ Jz~
J`M&{UP
public static void sort(int[] data) { |XYEn7^r
sort(data, IMPROVED_QUICK); eC DIwB28
} 8GPIZh'0h
private static String[] name={ \2[<XG(^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TG48%L
}; m4K* <
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private static Sort[] impl=new Sort[]{ Eu}b8c
new InsertSort(), 5/",<1
new BubbleSort(), 6[qA`x#
new SelectionSort(), pN6%&@) =
new ShellSort(), x"kjs.d7[<
new QuickSort(), J;t 7&Zpe
new ImprovedQuickSort(), }F6<w{|
new MergeSort(), )/ Ud^wi
new ImprovedMergeSort(), rr`;W}3
new HeapSort() =*BIB5
}; { kSf{>Ia
Mpue
public static String toString(int algorithm){ %U7.7dSOI;
return name[algorithm-1]; -b&{+= ^c
} v7
}/dRU${!
public static void sort(int[] data, int algorithm) { ubsSa}$q
impl[algorithm-1].sort(data); D(W,yq~7uY
} +1JH
m8Vdb"0
public static interface Sort { Y&H}xn
public void sort(int[] data); 2N#$X'8
} <%}QDO8\i
h/eR
public static void swap(int[] data, int i, int j) { ~na!@<zB{
int temp = data; |!|^ v
data = data[j]; ! hd</_#
data[j] = temp; s1Ok|31|
} Bm$"WbOq*R
} 5 *}R$