[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; ~;A36M-[.
} vf+GC*f
int i1=l; 2}P?N
int i2=mid+1; [80L|?, *
for(int cur=l;cur<=r;cur++){ E6 2{sA^
if(i1==mid+1) 1\_S1ZS
data[cur]=temp[i2++]; t_PAXj
else if(i2>r) yJJNr]oq
data[cur]=temp[i1++]; CfoT$g
else if(temp[i1] data[cur]=temp[i1++]; nmn 8Y V1
else IOx9".
data[cur]=temp[i2++]; ?,J'3nZ'
} CVp`G"W:
} 8MH ZWi
k%5o5Hx
} O.%' 47A
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改进后的归并排序: cZ{-h
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package org.rut.util.algorithm.support; 4#oLf1
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import org.rut.util.algorithm.SortUtil; 4]F:QS% x
y()7m/
/** J1Ay^*qRU
* @author treeroot ?n 9<PMo
* @since 2006-2-2 yaiw|j`A
* @version 1.0 M~Tx4_t
*/ t<Iy`r71
public class ImprovedMergeSort implements SortUtil.Sort { F|t3%dpj
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private static final int THRESHOLD = 10; y Q_lJIX
-^i[
/* J_]B,' 6
* (non-Javadoc) bF5mCR:
* h <s.o#8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u dhj$:t
*/ mT@8(
public void sort(int[] data) { 0(2r"Hi
int[] temp=new int[data.length]; 9%i|_c}
mergeSort(data,temp,0,data.length-1); p,hDZea
} xWv@PqXD
A.@S>H'P
private void mergeSort(int[] data, int[] temp, int l, int r) { 6PF7Wl7.
int i, j, k; e_Ue9c.}
int mid = (l + r) / 2; gZI88Q
if (l == r) Flrpk`4
return; HB}!Lf#*P
if ((mid - l) >= THRESHOLD) .""?k[f5Q
mergeSort(data, temp, l, mid); $wgHaSni
else Sz.sX w;
insertSort(data, l, mid - l + 1); 8Z{e/wnVF
if ((r - mid) > THRESHOLD) uTgvMkO
mergeSort(data, temp, mid + 1, r); MCBZq\c
else Dp)5u@I
insertSort(data, mid + 1, r - mid); o(=\FNe
%s}c#n)N
for (i = l; i <= mid; i++) { %|&WcpQR
temp = data; n*UD0U}`
} -RisZ-n*
for (j = 1; j <= r - mid; j++) { r2WW}W
temp[r - j + 1] = data[j + mid]; r &<sSE;5
} W+v7OSd92
int a = temp[l]; VM 3~W
int b = temp[r]; 8U98`# i
for (i = l, j = r, k = l; k <= r; k++) { g%P6f
if (a < b) { s<f<:BC
data[k] = temp[i++]; 73b(A|kQ@
a = temp; Qy>n]->%
} else { N,Fmu
data[k] = temp[j--]; Z2HH&3HA
b = temp[j]; `Ap<xT0H
} MN wMF
} }YiE}+VW|
} D%CKkQ<u2
~J:cod
/** z}>q/!q
* @param data #GTR}|Aga
* @param l zGDLF`
* @param i ws!pp\F
*/ ak:Y<}
private void insertSort(int[] data, int start, int len) { `Bw>0%.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .c+NsI9}
} 4CUzp.S`h
} 4'Svio
} &:K!$W
} 2U;6sn*e
<OQn|zU\
堆排序： S}@J4}*u["
kx6AMx!nX
package org.rut.util.algorithm.support; ZCP r`H
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import org.rut.util.algorithm.SortUtil; }XJA#@
M0+xl+c+
/** `x{*P.]N!<
* @author treeroot |ia#Elavo
* @since 2006-2-2 ]LcCom:]
* @version 1.0 3PmM+}j3
*/ gk&
public class HeapSort implements SortUtil.Sort{ >S<`ri'5_
zEHX:-f8
/* (non-Javadoc) <'{*6f@n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F$tshe(
*/ reBAxmt
public void sort(int[] data) { ~pv|
MaxHeap h=new MaxHeap(); Y(a0*fh
h.init(data); >s5i
for(int i=0;i h.remove(); i?{cB!7
System.arraycopy(h.queue,1,data,0,data.length); sbeS9vE
} ><t4 f(d
8>\tD
private static class MaxHeap{ J@CKgE
F.]D\"0`
void init(int[] data){ M<nKk#!+h
this.queue=new int[data.length+1]; ';>]7oT`
for(int i=0;i queue[++size]=data; $N;Nvp2
fixUp(size); <$"
} U]o
} zJ"`40V*;
U=kPxe
private int size=0; e7n[NVrX
<8 $fo
private int[] queue; r]sNI[
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public int get() { DlMT<ld
return queue[1]; | e?:Uq
} ^~ 95q0hq:
5_H`6-q
public void remove() { _l{`lQ}
SortUtil.swap(queue,1,size--); -nHt6AbqP
fixDown(1); K:<j=j@51
} [w1 4hHnq
file://fixdown pXoD*o b
private void fixDown(int k) { ktA5]f;
int j; x6qQ Y<>
while ((j = k << 1) <= size) { d~0k}|>
if (j < size %26amp;%26amp; queue[j] j++; (dH "b *
if (queue[k]>queue[j]) file://不用交换 8zI*<RX.Q
break; // k`X
SortUtil.swap(queue,j,k); ;2k!KW@
k = j; o)V@|i0Js
} fTq/9=Rq4
} EE{]EW(
private void fixUp(int k) { *F^t)K2
while (k > 1) { Wb1?>q
int j = k >> 1; 4#^E$N:
if (queue[j]>queue[k]) DN$[rCi7
break; 6rP?$mn2
SortUtil.swap(queue,j,k); prk@uYCa =
k = j; io[>`@=
} uht>@ WSg|
} ehpU`vQz
e|-%-juI
} }xA Eu,n^
rGn6S&-
} *^+]`S
j5Cf\*B4J
SortUtil： d,5,OJY2f
]B2%\}c
package org.rut.util.algorithm; k#oe:u`<
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import org.rut.util.algorithm.support.BubbleSort; p.ks jD
import org.rut.util.algorithm.support.HeapSort; X-_ $jKfM
import org.rut.util.algorithm.support.ImprovedMergeSort; Ue?mb$ykC.
import org.rut.util.algorithm.support.ImprovedQuickSort; =$wQA
import org.rut.util.algorithm.support.InsertSort; K!<3|d
import org.rut.util.algorithm.support.MergeSort; 83i;:cn
import org.rut.util.algorithm.support.QuickSort; Jv8JCu"eky
import org.rut.util.algorithm.support.SelectionSort; u6t%*''
import org.rut.util.algorithm.support.ShellSort; )w_hbU_Pb&
A!:R1tTR;S
/** y),yks?iv
* @author treeroot zMg(\8
* @since 2006-2-2 ;"9$LHH*
* @version 1.0 nu6p{_M
*/ B<Zm'hdX
public class SortUtil { 2{6%+>jB
public final static int INSERT = 1; w;wgh`ur
public final static int BUBBLE = 2; CZzgPId%x
public final static int SELECTION = 3; f;`7}7C
public final static int SHELL = 4; 2Kmnt(>
public final static int QUICK = 5; riu_^!"Z_
public final static int IMPROVED_QUICK = 6; ~p!=w#/
public final static int MERGE = 7; !^x;4@Ejm
public final static int IMPROVED_MERGE = 8; P-_2IZiz
public final static int HEAP = 9; _qf$dGqc
A=f)ntH~
public static void sort(int[] data) { Y(<(!TJ-
sort(data, IMPROVED_QUICK); ]}Jb'(gMO4
} z=j,-d%9
private static String[] name={ o]<@E uG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )4;$;a1
}; n|'}W+
q&nEodv>+
private static Sort[] impl=new Sort[]{ Ywo=w:'
new InsertSort(), MFtC2*
new BubbleSort(), r @URs;O=
new SelectionSort(), Yma-$ytp
new ShellSort(), f{w[H S,z
new QuickSort(), KLpFW}
new ImprovedQuickSort(), -\[&<o@/D
new MergeSort(), ;[q>
new ImprovedMergeSort(), +'"NKZ.>TT
new HeapSort() = tY%k!R
}; L$3{L"/
sHPK8Wsg
public static String toString(int algorithm){ Qm)c!
return name[algorithm-1]; S^:7V[=EgI
} =KW~k7TaN
A5IW[Gu!
public static void sort(int[] data, int algorithm) { w\}Q.$@
impl[algorithm-1].sort(data); \GdsQAF"
} w?JM;'<AYQ
87-z=>IU
public static interface Sort { w gkY\Q
public void sort(int[] data); 5`FPv4
} A2%RcKY7
p7p6~;P
public static void swap(int[] data, int i, int j) { G<FB:?|
int temp = data; iTVepYv4m
data = data[j]; C5^9D
data[j] = temp; vm.%)F#@
} ehV}}1>O
} U1=]iG<%